The Dispersion of SiC Nanopowders in Ethanol

The dispersion of SIC Nanopowders in Ethanol, dispersant is Polyethylene glycol PEG.

Silicon carbide SIC nanopowders is a ceramic material with excellent performance, such as low density, high hardness, high elastic modulus, wear resistance, heat resistance, corrosion resistance, low cost, easy to use, is the basic raw material preparation of engineering materials, functional materials, is also the ideal reinforced material, widely used in metal matrix composites, absorbing material, etc.

Eliminate  agglomeration  mainly include physical and chemical methods, the latter is the mainly one, because the smaller nano size is,  the more stubborn aggregate is.The surface chemical modification and dispersant dispersion become into the mainstream.By adding appropriate dispersant to wetting sic nanopowders surface to reduce the surface energy.different dispersants have the different dispersion mechanism, whose adding strengthen the mutually exclusive role between the particles.

The dispersion behavior of SiC nanopowders in ethanol solution was strongly dependent on the pH values, types and amounts of dispersant. Nonionic surfactant Polyethylene glycol PEG was found to be effective for the dispersion of SiC nanopowders in ethanol solution(PEG must be high molecular weight > 1000). When the medium is ethanol, as ethanol has good solubility to polyethylene glycol (peg), so that the chain of polyethylene glycol (peg) at full stretch and dispersed uniformly. the result is better for SIC nanopowders dispersion when liquid medium for ethanol and 5 wt % PEG adding amount .PEG adsorption quantity increases with the increased amount of PEG on the surface of the powders,  the medium will not affect the adsorption quantity.The study found that SIC nanopowders can well dispersed in ethanol with 30 to 60 vol % content in aqueous solution.With ethanol solution of 50 vol % content for the study of special case,  found SIC dispersion effect is best in alkaline conditions and PH value between 9 and 10. 

more info about disperssion of silicon carbide SIC nanopowders and pricing on SIC Nanopowders, pls contact us at hwnano@xuzhounano.com.