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液化膜对胶体悬浮液粘度的影响
引用本文:彭昌盛,谷庆宝,宋少先.液化膜对胶体悬浮液粘度的影响[J].中国化学,2005,23(5):603-607.
作者姓名:彭昌盛  谷庆宝  宋少先
作者单位:[1]lnstitutodeMetalurgia,UniversidadAutOnomadeSanLuisPotos [1][,Av.SierraLeona550,SanLuisPotosf,C.P.78210,Mexico [2]ChineseResearchAcademyofEnvironmentalSciences,Beijing100012,China
摘    要:Viscosity is one of the most important properties of colloids in mixing, transportation, stabilization, energy consumption, and so on. According to Einstein‘s viscosity equation, the viscosity of a colloidal dispersion increases with the increase of particle concentration. And the equation can be applicable to all micro-particle dispersions, because the effect of solvation films coated on particles can be neglectable in that case. But with the decrease of particle size to nano-scale, the formation of solvation films on nano-particles can greatly affect the viscosity of a dispersion, and Einstein‘s equation may not be applicable to this case. In this work, one kind of micro-size silica particle and two kinds of nano-size silica particles were used to investigate the effect of solvation films on dispersion viscosity, dispersed in water and ethyl alcohol solvents, respectively. The results of theoretical calculation and experimental investigation show that the increase of viscosity is contributed from solvation films by more than 95 percent for nano-particle dispersions, while less than 10 percent for micro-particle dispersions.

关 键 词:溶剂化薄膜  粘性  胶体分散系  微粒  胶质状态
收稿时间:2004-9-23
修稿时间:2005-1-6

Effect of Solvation Film on the Viscosity of Colloidal Dispersions
Peng Chang‐Sheng,Gu Qing‐Bao,Song Shao‐Xian.Effect of Solvation Film on the Viscosity of Colloidal Dispersions[J].Chinese Journal of Chemistry,2005,23(5):603-607.
Authors:Peng Chang‐Sheng  Gu Qing‐Bao  Song Shao‐Xian
Abstract:Viscosity is one of the most important properties of colloids in mixing, transportation, stabilization, energy consumption, and so on. According to Einstein's viscosity equation, the viscosity of a colloidal dispersion increases with the increase of particle concentration. And the equation can be applicable to all micro‐particle dispersions, because the effect of solvation films coated on particles can be neglectable in that case. But with the decrease of particle size to nano‐scale, the formation of solvation films on nano‐particles can greatly affect the viscosity of a dispersion, and Einstein's equation may not be applicable to this case. In this work, one kind of micro‐size silica particle and two kinds of nano‐size silica particles were used to investigate the effect of solvation films on dispersion viscosity, dispersed in water and ethyl alcohol solvents, respectively. The results of theoretical calculation and experimental investigation show that the increase of viscosity is contributed from solvation films by more than 95 percent for nano‐particle dispersions, while less than 10 percent for micro‐particle dispersions.
Keywords:solvation film  viscosity  dispersion  nano‐particle  micro‐particle  Einstein's viscosity equation
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