期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 335, 期 2, 页码 210-215出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2009.03.067
关键词
Kaolinite; Functionalization; Pyridine-carboxylic acids
资金
- Spanish and Brazilian Ministries of Education [PHB2005-0077-PC, CAPES 110/06]
- Junta de Castilla y Leon [SA101A07]
- MEC
- FAPESP
- CNPq
This paper presents the results of the functionalization of Brazilian Sao Simao kaolinite with pyridine-2-carboxylic and pyridine-2,6-dicarboxylic acids. The functionalization involved refluxing of the pyridinecarboxylic acid in the presence of kaolinite previously intercalated with dimethyl sulfoxide; both acids effectively displaced dimethyl sulfoxide from the clay interlayer. The resulting materials were characterized by X-ray diffraction, thermal analysis, infrared absorption spectroscopy, and C and N elemental analysis. The X-ray diffractograms revealed the incorporation of the acid molecules into the interlayer space of kaolinite. The thermogravimetric curves of the kaolinite samples functionalized with the pyridine-carboxylic acids indicated that the materials were thermally stable up to 300 degrees C. The displacements of the bands due to interlayer hydroxyls in the infrared absorption spectra also confirmed the functionalization of the kaolinite with the pyridine-carboxylic acids. (C) 2009 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据