Surface Organic Modification of TiO2 Powder and Relevant CharacterizationReport as inadecuate




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Advances in Materials Science and Engineering - Volume 2017 2017, Article ID 9562612, 8 pages - https:-doi.org-10.1155-2017-9562612

Research ArticleBeijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China

Correspondence should be addressed to Hao Ding

Received 9 November 2016; Revised 11 January 2017; Accepted 24 January 2017; Published 2 May 2017

Academic Editor: Michele Iafisco

Copyright © 2017 Hong Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Surface organic modification was conducted to TiO2 with modifiers to improve the dispersity and comparability of pigment TiO2 in application system by adjusting particle surface characteristics. Then, modification effects were characterized according to the changes in wetting contact angle and activation index of TiO2 before and after modification. Moreover, the modification mechanisms of sodium stearate and sodium oleate were studied by analyzing the characteristics of TiO2 surface functional groups in modification system and effects of modifiers. The results showed that, after being wet-processed with sodium stearate and sodium oleate, TiO2 could turn from surface hydrophilic to inductive hydrophobic with controllable degree. The wetting contact angle of modified TiO2 increased from 7° to 125.6° and 121.3°, respectively. The dispersity of TiO2 in organic medium was stronger than that in inorganic medium. The modifiers formed absorption with chemical property on TiO2 particle surface, so the inductive hydrophobicity of surface was stable.





Author: Hong Zhou, Sijia Sun, and Hao Ding

Source: https://www.hindawi.com/



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