Substrate-induced coagulation (SIC) of nano-disperse alumina in non-aqueous media: The dispersibility and stability of alumina in N-methyl-2-pyrrolidinone

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• 作者：Angelika Basch ; Simona Strnad
• 关键词：Contact angle ; Non-aqueous dispersions ; Electrophoretic ; Mobilities ; Substrate-induced coagulation (SIC) ; Aluminiumoxide ; Zeta potential
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2011
• 出版时间：20 January 2011
• 年：2011
• 卷：374
• 期：1-3
• 页码：9-12
• 全文大小：187 K

文摘

This work investigated colloidal properties such as the zeta-potential, the electrophoretic mobilities and the wetting behaviour of alumina dispersed in non-aqueous media. Non-aqueous dispersions of alumina were prepared in the solvent N-methyl-2-pyrrolidinone (NMP). The wetting behaviour of alumina in NMP was characterized by the powder contact angle method and the Wilhemy plate method. The behaviour of the dispersion should provide information for the development of a substrate-induced coagulation (SIC) coating process of nano-sized alumina in non-aqeous media. SIC is a dip-coating process that coats pretreated but chemically different surfaces with nano-sized particles. It was found that the anionic surfactant dioctyl sulfosuccinate (AOT) had no stabilizing effect on alumina dispersed in NMP.