明胶改性银微粉的电动电势和悬浮稳定性

The Zeta Potential and Suspension Stability of Silver Micro-powders Modified by Glutin

用光照还原制备银微粉分散体系,测量了不同还原条件下所得改性银微粉的电动电势及等电点,讨论了还原条件对银微粉等电点的影响。通过不同光照时间、明胶浓度、酸度及盐度下所得银微粉分散体系的紫外-可见光谱的测试和分析,讨论了以上条件对生成的银微粉分散体系悬浮稳定性的影响。

Modified silver micro-powders were prepared by radiation of the glutin/Ag^＋ system. The ξ potential and isoelectric point（IEP） of the silver particles were measured by JS94F micro-electropho.resis meter. The relations between the reduction conditions and the IEP of silver micro-powders were discussed. The ultra-violet spectrum of ultra-fine silver sol prepared in different conditions, such as radition time, concentrations of glutin, acidity and salinity, were also measured, meanwhile their effect on the suspension Stability of the silver sol was discussed.