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《Surface Technology》 2007-04
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Study on Absorption and Stability of Sodium Citrate on Nano-Al_2O_3 Colloform System

REN Yun,LIU Hui-min,SHI Zhi-ming(School of Materials Science and Engineering,Inner Mongolia University of Technology,Huhhot 010051,China)  
In order to reduce surfacation active of nano-alumina,make full use of its nano advantage,adsorption characteristic of sodium citrate on nano-alumina was analyzed qualitatively by sedimentation and viscosity experiments.And adsorption quantity of sodium citrate on nano-alumina was measured under pH=10 by UV spectrum.The wavelength was 198nm.Adsorption images were observed by TEM.The results show that adsorption behaviors accord with langmuir monolayer adsorption.The maximum of adsorption is 1.583mg/mL.When pH value is 10 and the amount of sodium citrate relative to nano-alumina is 2.5 percent,the viscosity and the sedimentation velocity can get the lowest value.That is to say,stability and adsorptive capability reach optimal effect,together.
【Fund】: 教育部“春晖计划”;; 2004年教育部“新世纪优秀人才支持计划”(NCET-040263)
【CateGory Index】: O614.31;TB383.1
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