用NaBH4还原AgNO3制备了纳米银溶胶,考察了反应温度、反应时间、搅拌速度和固体颗粒浓度对溶胶粒度和zeta电位的影响规律.研究发现,反应温度对粒度影响不明显,zeta电位绝对值随温度升高而升高,胶体稳定性上升;反应时间小于10 min会产生黑色沉淀,反应时间大于10 min后,对粒度影响不明显,zeta电位绝对值随时间增长有降低的趋势,胶体稳定性下降;搅拌速度升高,粒度减小,zeta电位的绝对值有升高趋势,胶体稳定性上升;溶胶中的银颗粒浓度由0.05‰提高到0.07‰时,zeta电位的绝对值降低,粒度增大,胶体稳定性降低.
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