阳离子表面活性剂对钠基蒙脱土的插层改性研究

doi:10.3724/SP.J.1077.2011.12049

无机材料学报 ›› 2012, Vol. 27 ›› Issue (7): 780-784.DOI: 10.3724/SP.J.1077.2011.12049

• 研究快报 • 上一篇

阳离子表面活性剂对钠基蒙脱土的插层改性研究

刘华斌, 肖汉宁

(湖南大学材料科学与工程学院, 长沙 410082)

收稿日期:2012-01-30 修回日期:2012-03-19 出版日期:2012-07-20 网络出版日期:2012-06-06
作者简介:LIU Hua-Bin(1978-), candidate of PhD. E-mail: huabinliu@163.com
基金资助:
National Natural Science Foundation of China (50972042)

Investigation on Intercalation Modification of Sodium-montmorillonite by Cationic Surfactant

LIU Hua-Bin, XIAO Han-Ning

(College of Materials Science and Engineering, Hunan University, Changsha 410082, China)

Received:2012-01-30 Revised:2012-03-19 Published:2012-07-20 Online:2012-06-06
About author:LIU Hua-Bin(1978-), candidate of PhD. E-mail: huabinliu@163.com
Supported by:
National Natural Science Foundation of China (50972042)

摘要/Abstract

摘要： 用十八烷基三甲基氯化铵(OTAC)通过离子交换法对钠基蒙脱土成功进行了有机化插层改性. 红外分析结果表明: OTAC与蒙脱土之间发生了反应, X射线衍射(XRD)分析结果显示随OTAC浓度的提高, 蒙脱土的(001)晶面间距逐渐扩大, 最大值可增至3.80 nm; 基于以上分析研究, 假定了OTAC分子在蒙脱土片层间的排列分布状态. 扫描电镜(SEM)观察到改性前后蒙脱土的表面形貌发生了显著变化, 改性前蒙脱土团聚成大小不一的致密堆积颗粒, 而改性后的蒙脱土被剥离为松散的鱼鳞片状; 接触角测试和沉降实验结果表明, 改性后钠基蒙脱土的表面润湿性由亲水性转变为亲油性.

关键词: 蒙脱石, 插层改性, 微结构, 表面性能, 纳米材料

Abstract: Sodium-montmorillonite (Na⁺-MMT) was intercalation modified with octadecyl trimethyl ammonium chloride (OTAC) in aqueous suspension via an ion exchange mechanism. Fourier transform infrared spectroscopy (FTIR) study indicates that OTAC is successfully intercalated into Na⁺-MMT layers and/or adsorbed on the surface of Na⁺-MMT. X-ray diffraction (XRD) analysis revealed that the interlayer spacing of the Na⁺-MMT was extended with the content of OTAC increasing, and the maximum spacing can reach about 3.80 nm. Results of scanning electron microscopy (SEM) analysis reveals the morphologies change from soherical-like particles to high-aspect ratio flakes after modification. Different configurations of OTA⁺ chains within MMT interlayer are proposed based on the above analysis. The results of contact angle and the dispersion analysis show that the surface wettability of Na⁺-MMT is converted from hydrophilic to organophilic.

Key words: montmorillonite, intercalation modification, microstructure, surface property, nanomaterials

中图分类号:

TQ174

刘华斌, 肖汉宁. 阳离子表面活性剂对钠基蒙脱土的插层改性研究[J]. 无机材料学报, 2012, 27(7): 780-784.

LIU Hua-Bin, XIAO Han-Ning. Investigation on Intercalation Modification of Sodium-montmorillonite by Cationic Surfactant[J]. Journal of Inorganic Materials, 2012, 27(7): 780-784.

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阳离子表面活性剂对钠基蒙脱土的插层改性研究

Investigation on Intercalation Modification of Sodium-montmorillonite by Cationic Surfactant

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