The gelation mechanism of carbon aerogel spheres

被引：0
|
作者：
Liu, Ning [1 ,2 ]
Li, Ming-Yuan [1 ]
Fu, Ruo-Wen [1 ]
机构：
[1] PCFM Laboratory, Materials Science Institute, Zhongshan University, Guangzhou 510275, China
[2] College of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China
来源：
Xinxing Tan Cailiao/ New Carbon Materials | 2009年 / 24卷 / 01期
关键词：
Aerogels - Carbon - Formaldehyde - Gelation - Phenols - Sols - Ultraviolet spectroscopy;
D O I：
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学科分类号：
摘要：
Carbon aerogel (CA) spheres were prepared by an inverse phase suspension polymerization of resorcinol and formaldehyde (RF) monomers with hexadecyl trimethyl ammonium bromide as catalyst. The gelation mechanism of RF gel was investigated by analyzing the changes of viscosity, pH, temperature and the UV spectra of the as-formed sol. Results indicate that the gelation of resorcinol and formaldehyde is a condensation polymerization, which can be divided into four stages including linear condensation, cross-linking, growth of colloidal particles and macroscopic gelation.
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页码：67 / 72
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