凹凸棒石表面接枝γ-氨丙基三乙氧基硅烷  

γ-aminopropyl Triethoxysilane Graft on Surface of Attapulgite

作　　者：刘惠[1] 杨海存[1] 叶青[1] 倪庆婷[1] 龚方红[1] 

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164

出　　处：《硅酸盐学报》2013年第6期848-853,共6页Journal of The Chinese Ceramic Society

基　　金：江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：分别采用含水体系和无水体系将γ-氨丙基三乙氧基硅烷(APTES)接枝到凹凸棒石(ATP)表面,制得改性粒子ATP-APTES。用Fourier红外光谱、Raman光谱、热重分析及透射电子显微镜对粒子进行了表征,结果表明:红外光谱的3 350 cm–1和Raman光谱的3321cm–1等处出现了伯氨基吸收峰,证实了APTES已成功接枝到ATP表面。用滴定法测定了改性粒子表面的APTES接枝率,研究了配方及工艺条件对APTES接枝率的影响。结果表明:在含水体系中,APTES用量大于5%、反应时间超过6 h均会造成接枝率的减小;无水体系制备的改性粒子接枝率明显高于含水体系,且接枝效率也较高;在乙二醇体系中,反应时间为6h时,改性粒子的接枝率高达725.8mmol/kg。γ-aminopropyl triethoxysilane（APTES） was grafted onto the surface of attapulgite（ATP） by hydrous system and anhydrous system modification methods respectively, obtained the modification particles AT-APTES. The samples were characterized by Fourier transform infrared spectra, DXR smart Raman spectrometer, thermo gravimetric analyzer and transmission electron microscopy. In infrared and Raman spectra, the appearance of amino group absorption peak at 3 350 cm-1 and 3 321cm-1 both conformed the APTES was successfully grafted onto surface of ATP. Titration method was used to determine the graft degree of APTES. The influence of formulation and grafting process on graft degree of APTES was investigated. The results showed that, in hydrous systems, APTES use more than 5% and the modification time more than 6h both would cause the decrease of graft degree. In anhydrous systems, the graft degree of the modified particles was significantly higher than the hydrous systems, and the graft efficiency was higher. In the glycol system, due to the stacking interactions of hydroxy centers, the graft degree obtained in a reaction time of 6 h was up to 725.8 mmol/kg.

关 键 词：凹凸棒石 Γ-氨丙基三乙氧基硅烷 接枝率 接枝效率 

分 类 号：TB321[一般工业技术—材料科学与工程]