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Application of Nano-silver Antibacterial Agent

Nanotechnology is the 21st century’s most promising emerging technology, widely used in information, biological, pharmaceutical, chemical, aerospace, energy, defense and other fields, which has huge market potential. Nanoparticles are particles in the particle diameter between 1~100nm, also referred to as ultrafine particles. Excellent performance of nanomaterials depends on its unique microstructure. Nanoparticles having a small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect, which shows a material different from conventional thermal, optical, electrical, magnetic, catalytic and sensitive properties.

Nano-silver material has a very stable chemical and physical properties that has a very excellent performance in many aspects of electrical, optical and catalytic, now widely used in many fields of ceramic materials, environmentally friendly materials and coatings. When silver particles are embedded in the different substrates, the original material exhibits different electrical and optical properties. Nowadays, study on silver nanoparticles is still a hot spot with a wide application. At present, nano-silver antibacterial nonwoven fabric as raw material of a variety of medical, health, household and industrial use antibacterial products have been listed.

On the domestic market, the successful launch of nano-silver wound paste, paste nanosilver burns and has dual protective effect of nano silver antimicrobial masks. In recent years, a seriou of products have developed in market, such as a nano-silver antibacterial sanitary napkins, sanitary pads nano-silver, nano-silver antibacterial diapers etc. The newly developed nano-silver antibacterial deodorant antibacterial socks and various types of air filter media, antibacterial wipes, antibacterial mop, antibacterial wipes and the like. Today because of people’s increasing emphasis on health care, nanosilver has excellent antimicrobial efficacy of its products and more widely. Nano silver can also be applied to antibacterial interior wall paint.

Antibacterial interior wall paint can effectively inhibit and kill harmful bacteria in the environment, reduce environmental microbiological hazards on the human body, thus achieving the purpose of the clean environment, the protection of human health, improve the living environment of great significance. Inorganic antibacterial agent is present advantages in safety, durability, broad-spectrum antimicrobial resistance, heat resistance, etc., to overcome the disadvantages of conventional paint mildew fungicides greater toxicity, a soluble, heat, poor durability, and increasingly draw people’s attention.

Currently there are natural antibacterial materials antibacterial materials, organic materials and inorganic synthetic antibacterial antibacterial materials.

In general, natural antibacterial material has the advantage of high security, but it generally short-lived, poor heat resistance, easy re-processing; synthetic organic antibacterial materials having a wide range antibacterial, sterilization speed, etc., but in general it side effects is relatively large, easy hydrolysis, life is short; nano-silver is an inorganic antibacterial material, from the current situation of people in research and development of nano-silver watch, which has a high safety, good heat resistance, antibacterial wide range continuous sterilization of long shelf life and other advantages.

It is precisely because of the nano silver antimicrobial material having the above characteristics and quantum effects of nanomaterials itself and a small effect size and great specific surface features, it attracts so many researchers to so researches and development.

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Nanoparticles In Modern Life

Nano-materials with traditional materials do not have the bizarre or unusual physical and chemical properties, such as the original conductive copper to a nanometer limit is not conductive, the original insulation silica, crystal, etc., when in a nanoscale boundaries electrical conduction. This is due to nano-materials with small particle size, surface area, surface energy is high, a large proportion of surface atoms, etc., as well as its unique three effects: surface effect, small size effect and macroscopic quantum tunneling effect.

Nowadays, nanoparticles, one of the “building blocks” of nanotechnology are all around us and have been with us throughout our history. Electron micrograph of gold nanoparticles is a snap shot of tiny gold crystals that are 1/10,000th the diameter of a human hair. In every aspect of our day to day lives, from the size of our personal electronic devices to the way diagnose and treat cancer; all part of the promised nanotechnology revolution, nanoparticles may soon transform it. The very word “nanotechnology” seems to suggest something alien; something that belongs far in the future or in the realm of our favorite sci-fi movies.

Gold nanopowders were with us when human beings began making their first tools, and they are present in products we buy at the grocery store every day. They largely flew under the radar until electron microscopes become commonplace several decades ago, but now, the more we turn our microscopes on everyday objects, the more nanoparticles we seem to find.

Even the most seemingly mundane objects can give rise to nanoparticles; detecting them is simply a matter of being able to look closely enough to see them (no simple matter for such small materials). You could find nanoparticles in your jewelry box or the drawer with your family’s fanciest silverware.

I got to see this first hand while I was working in the Hutchison lab at the University of Oregon several years ago.1 Some of my colleagues were trying to understand why silver nanoparticles change size and shape so rapidly, even when they are just left in storage on the shelf. Because they saw such rapid changes in the size and shape of silver nanoparticles, they thought to look and see if large every day pieces of silver and copper (Sterling silver forks, earrings, and wires) might give off nanoparticles.2 To test this, they simply left the fork (or any of the other items) on an electron microscopy grid for several hours, then took the fork away, and had a peek at what it had left behind. Surprisingly, they found that the silver and copper items had left silver and copper nanoparticles behind all over the grid; a most elegant demonstration that human beings can come into contact with a variety of nanoparticles, even in our own homes. Forks and earrings are merely the tip of the iceberg, though. Wherever we go during our day-to-day routine we can encounter nanoparticles (both synthetic and natural).

Synthetic nanoparticles (sometimes called anthropogenic nanoparticles) fall into two general categories: “incidental” and “engineered” nanoparticles. Incidental nanoparticles are the byproducts of human activities, generally have poorly controlled sizes and shapes, and may be made of a hodge-podge of different elements. Many of the processes that generate incidental nanoparticles are common every day activities: running diesel engines, large-scale mining, and even starting a fire.

Engineered nanoparticles on the other hand, have been specifically designed and deliberately synthesized by human beings. Not surprisingly, they have very precisely controlled sizes, shapes, and compositions. They may even contain “layers” with different chemical compositions(e.g. a core made out of gold, covered in a shell of silica, and coated with specifically chosen antibodies). Although engineered nanoparticles get more sophisticated with each passing year, simple engineered nanoparticles can be created by relatively simple chemical reactions that have been within the scope of chemists and alchemists for many centuries. This means that long before people could “see” a nanoparticle through an electron microscope, human beings were both deliberately and accidentally generating a wide variety of these materials.

Related reading: Copper Oxide Nanoparticles silicon dioxide nanoparticles

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The wide application of nanotechnology

Nanometer and meters, micrometers and other units, is a unit of length, and a nanometer is equal to ten-nine meters, about an order of magnitude than chemical bonds grew up. Nanotechnology is the study by between 0.1 and 100 nm in size the system motion laws of matter and interactions as well as possible technical problems in the practical application of science and technology. Can be derived from nano-electronics, mechanical, biological, materials processing and so on.

Nano-materials refers to at least three dimensional spatial scale of one-dimensional nanoscale materials, it is made between the size of atoms, molecules and the macroscopic system of next-generation materials composed of nanoparticles. Due to its small scale units, interface takes up a fair amount of ingredients. Therefore, nano-materials with a variety of features, which lead to different system of nano-particles from mostly large chunks of the macro-system of many of the special nature of the material. Nano system makes people awareness natural and entered a new of levels, it is contact Atomic, and molecular and macro system of link, is people past never exploration had of new field, actually by nano particles composition of material to macro system evolution process in the, in structure Shang ordered degrees of changes, in State Shang of non-balance nature, makes system of nature produced is big of difference, on Nano material of research will makes people from micro to macro of transition has more in-depth of awareness. Characteristics of nanomaterials?

When the particle size down to the nanoscale, will lead to sound, light, electricity, magnetism, and thermal performance of new features. For example: is a wide research of II-VI semiconductor cadmium sulfide, the absorption band edge and luminescence spectra of peak position will significantly blue shift as the grain size decreases. According to this principle, can control the grain size to get different energy gap in cadmium sulfide, which greatly enriched material for content and is expected to get new use. We know the type of material is limited, micro-and nano-CDs are made of cadmium and sulfur, but by controlling production, band gap and luminescent properties of different materials can be obtained. In other words, through nano-technology is a new material. Nano Element Particles Often has a large surface area per gram surface area of the solid can reach hundreds of thousands of square meters, which makes them available as a highly active adsorbents and catalysts, hydrogen storage, organic synthesis and has important applications in areas such as environmental protection.

Nano-effects means that nano-materials with traditional materials do not have the exotic or unusual physical, chemical characteristics, such as conductive copper to a Nano-grade boundaries are not conductive, insulating silicon dioxide, crystals, and began conducting at a Nano line.

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Development of nanometer drug carrier

Common nano drug carriers include inorganic and polymeric nano-drug delivery nano drug carriers. Among them, the polymeric nanoparticles as drug delivery research earlier, has a small amount of polymer-based drug of nano carrier got some European and American countries the drug agency approved for clinical treatment. This is because the polymer nanoparticles good biocompatibility, toxicity, drug coated through physical or chemical bonding in its polymer nanoparticles, excreted polymeric carrier via degradation after their release. Common inorganic nano-drug delivery system include magnetic nanoparticles, mesoporous silica, Nano-carbon materials, quantum dots, and the inorganic nano-drug delivery system, in achieving the targeted drug delivery, controlled-release and sustained-release drugs, as well as targeted cancer therapy is a good prospect

And Nano Element Particles compared to, inorganic nano particles not only size, and morphology can controlled sex like surface area big, and unique of light, and electric, and magnetic nature gives its has potential of imaging developer, and target to conveying and collaborative drug treatment, function, makes its more for in cell within for drug conveying. main introduced Fe3O4 magnetic Nano grain, and contains drug Nano hydroxy apatite, and quantum points several new contains drug nano particles of typical preparation process and the exists of problem, And looks forward to the prospect of drug-loaded nanoparticles.

Biomedical uses of magnetic nano-particles is mainly due to its special magnetic properties, it is usually based on magnetic nano-particles for nuclear, organic or inorganic shell by surface modification coating formed by assembling composite particles with unique features. Nano magnetic target to drug carrier as a new drug carrier, can in specific of oriented mechanism Xia, will drug efficient of transport to target organ, makes drug in local played role, greatly to reduced has drug on body of HIV side effects. magnetic nano particles due to its good of Super Shun magnetic can makes its outside magnetic field of role Xia convenient to for magnetic separation and oriented, and due to magnetic nano particles can in magnetic field in the not was permanent magnetization, so in body both security and easily control. In addition, the magnetic nanoparticles also has suspension stability, functional group characteristics and biocompatibility, biodegradability and magnetic fluorescent double-functional advantages.

There are many kinds of magnetic materials, including Tungsten Carbide Cobalt Powder, chromium oxide, iron oxide, ferrite and iron nitride, including magnetic particles of Fe3O4 is the most widely used. Magnetic Fe3O4 nanoparticle size distribution around 1-100 nm, Nano-size particles with different from atoms is also different from the physical and chemical properties of the bulk materials [6], magnetic nanoparticles of quantum size effect and surface effects causes significant changes in magnetic properties. Nano-particle size d<16 NM, anisotropic thermal motion reduced and compared, easy magnetization direction without the law change, they generate superparamagnetic. And Fe3O4 has was proved nontoxic and has bio compatible sex, based on unique of physical, and chemical, and thermal and magnetic performance, Super Shun magnetic iron oxide nano particles has is big of potential application Yu variety bio medicine field, as cell mark, and target to and the as cell ecological research of tool for cell separation and purification, cell treatment; organization repair; drug transmission; NMR Imaging; cancer of fever treatment,. Fe3O4 become most biomedical research in the field and also the most promising Nano magnetic material.

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Nano-elements multi-purpose

 

Nanometer (nm), also known as NM, as well as cm, DM and m, is a unit of measurement of length. Specifically, a nanometer is equal to the length of one-zero meters, equal to 4 times the Atomic size, one out of 10,000 hair thickness; figuratively speaking, a Nano-objects dropped on the table tennis is like a ping-pong ball placed on the Earth. This is the concept of nanometer length.

Spherical Nano Element surface area is proportional to the square of the diameter of the Particles, the volume is proportional to the cube of diameter, it is inversely proportional to its surface area and diameter. As the particle diameter gets smaller, specific surface area will increase significantly, indicating the percentage of atoms on the surface will be significantly increased. For diameters greater than 0.1 micron particle effects are negligible when at less than 0.1 micron sizes, a drastic increase as a percentage of surface atoms, even 1 g the sum of ultrafine particle surface area of up to 100 square meters, the surface effects can not be ignored. Super micro particles of surface and chunks objects of surface is is different of, if with high rate electronic microscope on gold super micro particles for TV camera, real-time observation found these particles no fixed of form, with time of changes will automatically formed various shape (as cubic eight surface body, ten surface body, 20 surface body more Ulrich,), it both different Yu General solid, and different Yu liquid, is a associate solid. Under electron beam irradiation in electron microscopy, surface atoms as if into the “boiling” status, size greater than 10 nm, I just don’t see this instability of the structure and micro-particles with a stable structure.

Hongwu International Group Ltd, with HWNANO brand, is a high-tech enterprise focusing on manufacturing, research, development and processing of nanoparticles,nanopowders, nanowires,Nano Element Particles. oxides. We have our own nano powders production base,located in Xuzhou, Jiangsu, mainly supplying silver nanoparticles, copper nanoparticles, silicon carbide whisker/powders, carbon nanotubes, graphene, silicon carbide nanopowders, silver nanopowders, silver nanowires and other nano materials with small quantity for researchers and bulk order for industry groups.

Nano element also plays an important role in the drug, commonly include inorganic nano-drug delivery nano drug carriers and polymeric nano-drug delivery system. Among them, the polymeric nanoparticles as drug delivery research earlier, has a small amount of polymer-based drug of nano carrier got some European and American countries the drug agency approved for clinical treatment. This is because the polymer nanoparticles good biocompatibility, toxicity, drug coated through physical or chemical bonding in its polymer nanoparticles, excreted polymeric carrier via degradation after their release. Common of inorganic nano drug carrier including magnetic nano particles, and between hole II oxidation silicon, and nano carbon material, and quantum points, these inorganic nano drug carrier, in achieved target to sex to drug, and controlled release gentle release drug and cancer target to treatment, aspects performance out good of application prospects, and polymer nano particles compared to, inorganic nano particles not only size, and morphology can controlled sex like surface area big, and unique of light, and electric, and magnetic nature gives its has potential of imaging developer, and target to conveying and collaborative drug treatment, function, To make it more suitable for intracellular drug delivery.

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Nitrides Nanoparticles Suppliers

 

Nano-scale fabrication of nitride particles while there are already a number of relevant reports, but the international community still does not have a systematic, comprehensive method of thermal plasma (NPMR) study on preparation of nitride nanoparticles.

Nano-particles or nano-powder, usually refers to the particle size 100nm, is a cross between atoms, molecules and macroscopic objects in the intermediate state between solid materials. Its unique physical and chemical properties make it popular, is expected to have wide application in high density magnetic recording materials absorbing material; magnetic fluid materials radiation materials monocrystalline silicon and polishing materials for precision optical components; electrode materials for advanced batteries and solar cell materials efficient catalyst efficient combustion-supporting agent sensors; ceramics with high toughness; human restoration materials; anticancer agent and so on.

Nano particles material of preparation method variety, currently compared mature of method main is divided into three big class: < a > gas phase method: has gas in the evaporation method, such as resistance heating method, and HF induction heating method, and plasma heating method, and electron beam heating method, and laser heating method,; chemical gas instead should method, such as laser induced chemical its instead should method, and plasma strengthened chemical its instead should method,; chemical gas phase condensed method; sputtering method etc. < Ii > liquid phase, such as precipitation, hydrolysis, aerosol, emulsion method and-melt Adhesive gel.  Three  solid method: pyrolysis, solid phase reaction method, for example by ball-milling method.

Had has many people using similar of method preparation nitride real, but they more using elemental and ammonia, containing nitrogen of compounds, used hot, stereo heating chemical reactions of approach for preparation: but currently also rarely was using hot plasma method will nitrogen directly and pure of elemental reaction preparation nitride real particles, especially also no preparation nitride silicon, and nitride boron, and nitride gallium of system research of reported.

Hongwu International Group Ltd, with HWNANO brand, is a high-tech enterprise focusing on manufacturing, research, development and processing of nanoparticles,Nitrides Nanoparticles Suppliers,nanopowders, nanowires, oxides. We have our own nano powders production base,located in Xuzhou, Jiangsu, mainly supplying silver nanoparticles, copper nanoparticles, silicon carbide whisker/powders, carbon nanotubes, graphene, silicon carbide nanopowders, silver nanopowders, silver nanowires and other nano materials with small quantity for researchers and bulk order for industry groups.

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The unique characteristics of nano-particles of elements

 

Nanometer (nm) and meters, micrometers and other units, is a unit of length, and a nanometer is equal to ten–nine meters, about an order of magnitude than chemical bonds grew up. Nanotechnology is the study by between 0.1 and 100 nm in size the system motion laws of matter and interactions as well as possible technical problems in the practical application of science and technology. Can be derived from nano-electronics, mechanical, biological, materials processing and so on.
Nano Element Particles of material refers to at least three dimensional spatial scale of one-dimensional nanoscale materials it is made between the size of atoms, molecules and the macroscopic system of next-generation materials composed of nanoparticles. Due to its small scale units, interface takes up a fair amount of ingredients. Therefore, nano-materials with a variety of features, which lead to different system of nano-particles from mostly large chunks of the macro-system of many of the special nature of the material. Nano system makes people awareness natural and entered a new of levels, it is contact Atomic, and molecular and macro system of link, is people past never exploration had of new field, actually by nano particles composition of material to macro system evolution process in the, in structure Shang ordered degrees of changes, in State Shang of non-balance nature, makes system of nature produced is big of difference, on Nano material of research will makes people from micro to macro of transition has more in-depth of awareness. Characteristics of nanomaterials?
When the particle size down to the nanoscale, will lead to sound, light, electricity, magnetism, and thermal performance of new features. For example: is a wide research of II-VISemiconductor cadmium sulfide, the absorption band edge and luminescence spectra of peak position will significantly blue shift as the grain size decreases. According to this principle, can control the grain size to get different energy gap in cadmium sulfide, which greatly enriched material for content and is expected to get new use. We know the type of material is limited, micro-and nano-CDs are made of cadmium and sulfur, but by controlling production, band gap and luminescent properties of different materials can be obtained. In other words, through nano-technology is a new material. Nanoparticles often have a great deal of surface area per gram surface area of the solid can reach hundreds of thousands of square meters, which makes them available as a highly active adsorbents and catalysts, hydrogen storage, organic synthesis and has important applications in areas such as environmental protection. Nano-materials, we can use a “lighter, higher, stronger” it summed up in six words. “Lighter” refers to the aid of nano-materials and technologies, we can prepare a smaller performance even better devices, reducing the volume of devices to make it lighter. Need three houses to the first computer store, and with micron semiconductor manufacturing technology, miniaturization is realized, and popularity of the computer. In terms of energy and resource use, this “small” benefits were all very stunning. “Higher” refers to the nanostructured materials is expected to have a higher optical, electrical, magnetic and thermal properties. “Stronger” refers to the mechanical properties of nano-materials have a stronger (such as strength and toughness), Nano ceramics, Nano is expected to solve the brittleness problem of ceramic, and may exhibit similar to the materials such as metal-plastic
Nano-effects means that nano-materials with traditional materials do not have the exotic or unusual physical, chemical characteristics, such as conductive copper to a Nano-grade boundaries are not conductive, insulating silicon dioxide, crystals, and began conducting at a Nano line. Nano-materials with small particle size, this is due to large specific surface area, the percentage of high surface energy and surface features, as well as its three major effects: surface effect, small size and macroscopic quantum tunneling effect. Meaning of nanotechnology–1. So-called nanotechnology refers to the 0.1~100 in the nano-scale, study the motion of electrons, atoms and molecules and characteristics of a new technology. Scientists studying the matter of process, found at the nano-scale several, dozens of isolated Atom or molecule, show many significant new features, and take advantage of these features made with a specific device technology, called nanotechnology … Nanotechnology and microelectronics is the main difference between: is nanotechnology research to control individual atoms and molecules to achieve device–specific features, is the volatility of electronic working; is controlled primarily through electronic and microelectronic technology group to implement its functionality is the use of electronic particle. Purpose of the research and development of nanotechnology, is to achieve effective control of the entire microcosm … Nanotechnology is a cross with very strong multidisciplinary research covering large areas of modern science and technology.
Hongwu International Group Ltd, with HWNANO brand, is a high-tech enterprise focusing on manufacturing, research, development and processing of nanoparticles,nanopowders, nanowires, oxides. We have our own nano powders production base,located in Xuzhou, Jiangsu, mainly supplying silver nanoparticles, copper nanoparticles, silicon carbide whisker/powders, carbon nanotubes, graphene, silicon carbide nanopowders, silver nanopowders, silver nanowires and other nano materials with small quantity for researchers and bulk order for industry groups.
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Antimony Doped Tin Oxide market demand

 

With the rapid economic development, electronics, chemicals, textiles, machine room, static electricity problems in packaging and other industries have attracted wide attention. Conductive filler can eliminate the matrix materials, such as plastics, coatings, chemical fiber, rubber, ceramic tile is the main method of static electricity, by on the principle of conductive filler in the insulating substrate forming a conductive network charge to reach the matrix release purposes. Commonly used include permanently conductive filler metal powder, carbon, oxides, and so on. To reduce costs or improve existing in conductive fillers fillers chroma can be chemically heterogeneous nucleation theory in some white powder coating formation of Antimony Doped Tin Oxide composite conductive powder. Due to the conductive path formed in the substrate is a prerequisite for eliminating static electricity, so using high aspect ratio materials, such as conductive carbon nanotubes, carbon fiber, conductive metal fibers (stainless, nickel fiber, etc), needle-shaped titanium dioxide coated ATO, can reduce the amount of conductive material, thereby reducing production costs.

Antimony Doped Tin Oxide coating should first consider its dispersion in the paint, though Antimony Doped Tin Oxide compared to have better dispersion of metal powders, but due to its high surface energy of nanometer powder made prevailing in its powder agglomeration, increase of the dispersion degree of difficulty. This years of slow progress in the application of nano-ATO conductive powder are the main reasons. Of nanometer ATO powder by dispersing and anti-static application data show that, with the decrease of slurry particle size of nano-ATO particles in, that are required to achieve the same anti-static effect of nanometer ATO powder dosage reduced, reduce operating costs, while mechanical and optical properties of materials have also been improved.

Its good insulating properties, is widely used in the coatings, chemical fibre, polymer film and other fields. In addition as a conductive materials, dispersion, activity, thermoplastic-resistance, abrasion resistance, security with other conductive material (such as graphite, surfactants, such as metal powders), incomparable advantages. Is used in optoelectronic display, transparent electrode, solar cell and LCD, catalytic, and so on.

Antimony Doped Tin Oxide powders and conductive material offers significant advantages over traditional, in transparent, conductive, anti-static, infrared blocking and other fields, has broad application prospects. But in electro-optical mechanism of Antimony Doped Tin Oxide powders, Nano-ATO powder application and secondary development of nanometer ATO powders and other aspects to be further studied.

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Aluminum Oxide Nanopowder

 

Alumina is a diverse class of metallic oxides, main polymorphic forms include the most common are type a and y, crystalline transition mainly depends on the temperature. Aluminum hydroxide or hydrated aluminium oxide is heated to 800 degrees Celsius converted into y-alumina and 1200 degrees Celsius converted into a-alumina. Structures and properties of alumina-special features to make it in the electronics, chemical, aerospace and other fields has been widely used. With the development of high technology and society more and more attention on new materials, domestic and foreign workers to pay great attention to the development and application of new materials, all kinds of material with special functionality to get people’s attention. Among them, the micronization of substances considered to be materials development research foundation. Superfine powder usually refers to the scale the so-called molecular, Atomic and macroscopic objects, the granularity (1-100) particles in the nm range.

High pure Super fine Aluminum Oxide Nanopowder is purity in 99.99% above of super micro-powder body material, is 21st century materials in the production maximum, and output Supreme, and uses most wide of tip material is one of, high pure alumina powder body due to its purity high, grain diameter small, displayed out has general material by not has of light, and electric, and magnetic, and heat and mechanical characteristics, thus it as a new function material widely application Yu optical, and chemical and the special ceramic, multiple field. Overseas studies on Nano-alumina work carried out earlier, the technology has advanced. Following is some has representative of research results: in gas phase method in the, United States of Chen y j with gas phase rule prepared out grain diameter for of no reunion alumina nano particles; with gas phase hot solution to three methyl aluminum Al (CH3) 3 and N20 for material, joined C2H4 as reaction sensitive of agent, used C02 laser (C2H4 in C02 laser launches wavelength at has resonance absorption) heating for reaction, Then 1200-1400 deg heat successfully synthesizes A1203 particle diameter of 15-20nm; Japan patent by evaporation-condensation method, alumina (purity of 99.99%) as the evaporation source and put them in a pressure up to 0. 01 Pa in a vacuum, into 02,CO or C02, keeping pressure at 15Pa alumina ceramics using C02 laser irradiation makes it evaporate, in alumina in gas evaporation cools rapidly to get ultra high-purity alumina. In liquid phase method in the, Felde b with sol-gel glue method, to ISO butanol aluminum for precursor body, joined acetyl acetone and ammonium nitrate, by hydrolysis, and sank of formed gel glue, again by dry, and forged burn get grain diameter for 50nm of Alpha-A1203 particles; France of Eponthieu using nitric acid aluminum, and xylene, and tween80 composition micro emulsion system, business got 40-50nm of alumina particles. Study of nano-alumina in China is from the beginning of the 90 ‘s, which was mainly concentrated in the Chinese Academy of Sciences and universities during 10 years in 1990-2000, China to break Western embargo on China. Has set up a variety of physical and chemical method for preparation of nano-materials. Research on Nano-Alumina was also a certain degree of progress.

At present, the preparation of Aluminum Oxide Nanopowder mainly stay at the trial stage, and conducted some exploration of the industrialization level of production, but most of the preparation methods of nano-alumina wide particle size distribution, and poor preparation process is repeated. There are a lot of basic work requires a lot of manpower and resources to complete.

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Nano silver antibacterial is widely used

Nano-Silver as a special form of the metal silver, refers to the particle size of powders of 1~100nm metallic silver granules. Since the particles are extremely small and large surface area, so that it will have significant surface effects, quantum size effect and the quantum tunneling effect, which makes silver with superior permeability activity and its bactericidal effect is hundreds of times times the ordinary silver. In addition, due to the nano-scale electronic properties of metallic silver, it can be used with sparse radicals on bacterial proteins, amino group electron withdrawing groups formed, such as ligand, which further enhances the antibacterial effect. Is a new class of Nano Silver antimicrobial agent, has a strong bacteriostatic and bactericidal action and a broad spectrum of antibacterial activity, and inorganic antibacterial effect of antibacterial agent is unable to compare with traditional, non–resistance, and high security. With the serious of antibiotic bacterial resistance, study and application of Nano-Silver disinfect areas increasingly wide attention.
Humans found Silver Nanoparticles Antimicrobial for a long time, as early as in ancient times, useful silver food storage to prevent bacteria growth record. With the progress of science and technology, it was discovered that silver is a safe and broad spectrum bactericidal materials apply it gradually spread. Now clinical Shang people has widely using sulfa pyrimidine silver, and fluoride piperazine acid silver, and zinc silver breast cream, and sulfa pyrimidine silver collagen protein film, and irradiation fluoride silver pigskin, treatment Burns burns to prevent green pus bacteria, bacteria of reproduction, nitric acid silver water solution as eye anti-inflammatory, and Silver Mercury alloy as dental material and the containing silver water solution treatment toothache, and glue State silver in gynecological lotion in the are application widely. Also available on a daily basis in activated carbon containing silver or silver woven filters purify drinking water, and so on.
Silver Nanoparticles principle. Nano Silver due to its structure unit size between macro material and micro Atomic and molecular Zhijian, performance out special of surface effect, and small size effect, and quantum size effect and macro quantum tunnel effect, can easily to entered disease original body; Nano Silver particles size small, surface by accounted for of volume percentage big, surface of key State and electronic State and particles internal different, surface Atomic distribution bit not congruent led to surface of activity location increased, has has as antibacterial agent of basic conditions; has is strong penetrating force, Have full access to and attack pathogens, thereby fostering stronger biological effects, high security, and antibacterial wide advantages of long continuous sterilization time. Antibacterial properties of silver nanoparticles in particular, pathogenic bacteria, cocci, bacteria killing effect of silver ion is much larger than the traditional disinfectant. Silver nano-particles can kill bacteria, fungi, Mycoplasma, chlamydia, and other disease-causing organisms.
Nano Silver antibacterial agent of role main including 3 a links and pathogens metabolism enzyme in the of sh base combines, makes enzyme lost live and exposed of bacteria cell wall occurred peptide poly sugar reaction, formed reversible composite real, makes bacteria cannot will oxygen and energy trans-into cell and pathogenic microbial in the of DNA combines, led to DNA structure degeneration, inhibition DNA copy. In addition, the Nano-Silver and non-antibiotic antimicrobial agent, of silver ions do not develop resistance in bacteria, is a long-acting antibiotic agents.
Application of Nano-Silver. Nano-materials because of their size decreases, surface area, surface energy and surface tension are greatly increased, with volume effect and quantum size effect, make it light, heat, electric, magnetic, mechanical and chemical properties is quite different from the traditional characteristics of materials. Silver nano-particles with UV resistance, absorption of visible and infrared radiation, high strength and toughness, good conductivity and shielding effects, antimicrobial, antiseptic, deodorant, and other outstanding features. At present, Nano-Silver anti-bacterial nonwovens material of a variety of medical, health, household and industrial use of antibacterial products already listed.