Desorption of stearic acid upon surfactant adsorbed montmorillonite

被引：18

作者：

Lu, Longfei ^{[1
,2
]}

Cai, Jingong ^{[2
]}

Frost, Ray L. ^{[1
]}

机构：

[1] Queensland Univ Technol, Sch Phys & Chem Sci, Inorgan Mat Res Program, Brisbane, Qld 4001, Australia

[2] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2010年 / 100卷 / 01期

基金：

澳大利亚研究理事会; 中国国家自然科学基金;

关键词：

Thermogravimetric analysis; Differential thermogravimetric analysis; Chemisorption; Montmorillonite; Desorption; Stearic acid; RATE THERMAL-ANALYSIS; MINERAL PARTICLES; ADSORPTION; HYDROZINCITE; SMITHSONITE;

D O I：

10.1007/s10973-009-0169-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Thermal analysis and differential thermal analysis offers a novel means of studying the desorption of acids such as stearic acid from clay surfaces. Both adsorption and chemisorption can be distinguished through the differences in the temperature of mass losses. Increased adsorption is achievable by adsorbing onto a surfactant adsorbed montmorillonite. Stearic acid sublimes at 179 A degrees C but when adsorbed upon montmorillonite sublimes at 207 and 248 A degrees C. These mass loss steps are ascribed to the desorption of the stearic acid on the external surfaces of the organoclays and from the de-chemisorption from the surfactant held in the interlayer of the montmorillonite.

引用

页码：141 / 144

页数：4

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