2012•Journal of Shihezi UniversityRequires access

Investigate on Chemical Modification Technology of Xinjiang Vermiculite

Mao Yan-sheng, Xia Xinfu, Liang Hong, Yang Jianrong, Xiaowu Gong

Abstract

Xinjiang vermiculite was modified by the combination methods of acid treatment and sodium ion exchange.Hexadecyltrimethylammonium bromide(HDTMAB) was selected as the catalyst for the organic intercalation of modified vermiculites.The results showed that Na-modified vermiculites could be obtained after being treated by oxalate acid and sodium ion exchange.Furthermore,Na-modified vermiculites with larger interlayer spacing and even exfoliation could be obtained,when the amount of HDTMAB was more than 5 times of the cation exchange capacity(CEC).Conclusion:Structure modification plays a significant role in the organic intercalation of vermiculite.

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Key concepts: Vermiculite, Intercalation (chemistry), Ion exchange, Exfoliation joint, Chemistry, Oxalate, Sodium, Cation-exchange capacity