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

被引：7

作者：

Basch, Angelika ^{[1
]}

Strnad, Simona ^{[2
]}

Ribitsch, Volker ^{[3
]}

机构：

[1] Graz Univ Technol, Inst Chem Technol Anorgan Stoffe, A-8010 Graz, Austria

[2] Univ Maribor, Inst Engn Mat & Design, SLO-2000 Maribor, Slovenia

[3] Karl Franzens Univ Graz, Inst Chem & Phys Chem, A-8010 Graz, Austria

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2009年 / 333卷 / 1-3期

关键词：

Contact angle; Non-aqueous dispersions; Electrophoretic mobilities; Substrate-induced coagulation (SIC); Titandioxide; Zeta potential; CARBON-BLACK; SURFACES; FIBERS;

D O I：

10.1016/j.colsurfa.2008.09.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Dispersions of 1 wt% titandioxide (titania or TiO2) were investigated with respect to their stability in nonaqueous media. The objective of this work was to find conditions for the substrate-induced coagulation (SIC) process in N-methyl-2-pyrrolidinone (NMP). The SIC process is a dip-coating process that enhances adsorption of fine dispersed particles on a pre-conditioned surface. The wetting behavior of titania and NMP was investigated by the powder contact angle method. The absorption process of the polar solvent NMP on the acid oxide TiO2 and Aerosol OT (AOT) (bis-2-ethylhexyl sodium sulfosuccinate) was also investigated and a polar or hydrophilic interaction was found. The stability of titania in NMIP dispersions and the influence of the solvent AOT and the electrolyte LiCl was investigated. By studying the electrophoretic mobilities of titania particles in NMP and the influence on solutes by the electrophoretic method phase analysis light scattering (PALS) and the electroacoustic method this paper explores suitable conditions for non-aqueous substrate-induced coagulation of titania. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：163 / 169

页数：7

共 31 条

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