Characteristics evaluation of calcium carbonate particles modified by surface functionalization

被引：52

作者：

Tang, Zhongfeng ^{[1
,4
]}

Cheng, Guojun ^{[2
]}

Chen, Youshuang ^{[3
]}

Yu, Xiuhua ^{[2
]}

Wang, Honglong ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[2] Anhui Univ Sci & Technol, Sch Mat Sci & Engn, Huainan 232001, Peoples R China

[3] Guangxi Univ Sci & Technol, Coll Biol & Chem Engn, Liuzhou 545006, Peoples R China

[4] Chinese Acad Sci, Key Lab Nucl Radiat & Nucl Energy Technol, Shanghai 201800, Peoples R China

来源：

ADVANCED POWDER TECHNOLOGY | 2014年 / 25卷 / 05期

基金：

中国国家自然科学基金;

关键词：

CaCO3; particles; Coupling agent; Surface modification; Functionalization; NANOPARTICLES;

D O I：

10.1016/j.apt.2014.05.017

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Calcium carbonate (CaCO3) particles were modified by a direct blending method using different coupling agents. The changes in the CaCO3 particles were determined using different techniques. Compared with pristine particles, the modified CaCO3 particles show good dispersion, particularly those modified by gamma-methacryloxypropyl trimethoxy silane. Results of the thermogravimetric analysis indicated that the coupling agents were adsorbed or anchored on the surface of the CaCO3 particles, thereby hindering aggregation. The formation of covalent bonds [Ca-O-Si] or [Ca-O-Ti] was verified using Fourier transform infrared spectroscopy and X-ray diffraction. The modified CaCO3 particles showed more stable colloidal dispersion in ethyl acetate than that of pristine CaCO3 particles. Some silane or titanate coupling agents can be combined with CaCO3 by covalent bonds, thereby changing the surface properties of CaCO3 and enhancing dispersion in many organic media. The hydroxyl groups on the surface of CaCO3 particles can interact with silanol groups or titanate coupling agents forming an organic coating layer. (C) 2014 The Society of Powder Technology Japan. Published by Elsevier B. V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：1618 / 1623

页数：6

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