表面活性剂和硅烷偶联剂复合改性水滑石的表面性质  

Surface Characterization of Layered Double Hydroxides by Compounding Modification with Surfactant and Silane Coupling Agent

作　　者：倪哲明[1] 付晓微[1] 薛继龙[1] 李远[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,杭州310032

出　　处：《无机化学学报》2012年第3期471-476,共6页Chinese Journal of Inorganic Chemistry

基　　金：浙江省自然科学基金(No.Y406069)资助项目

摘　　要：采用十二烷基硫酸钠(SDS)和3-氨丙基三乙氧基硅烷(KH550)、乙烯基三乙氧基硅烷(KH151)对锌铝水滑石进行有机改性,得到插层改性与表面改性结合的聚合物/锌铝水滑石复合材料。XRD、FTIR及计算机模拟的分析结果表明,SDS已垂直插入水滑石层间,层间距达到2.70 nm,KH550及KH151只是覆盖在水滑石表面,与层板表面羟基进行偶联。反相气相色谱的结果表明,复合材料的表面能(γsd)均比水滑石小,其中KH151-SDS-LDHs及KH550-SDS-LDHs的表面能较接近,由材料表面的酸碱常数,判断出SDS-LDHs表面趋于两性,KH151-SDS-LDHs及KH550-SDS-LDHs表面偏碱性,适于做碱性聚合物的填料。A polymer/ZnAl-LDHs composite was prepared by modifying the Layered Double Hydroxides（LDHs） organically with sodium dodecylsulfate（SDS） and 3-Triethoxysilylpropylamine（KH550）,Ethylenetriethoxysilane（KH151）.The results from the XRD,FTIR and computer simulation analyses show that SDS intercalates into the layers of LDHs perpendicularly with a spacing of 2.70 nm,KH550 and KH151 cover the surface of LDHs condensing with the hydroxyl groups on the hydrotalcite surface.The inverse gas chromatography results indicate that the dispersive component for the surface energy（γ S d） of nanocomposites is lower than that of LDHs,and γ s d of KH151-SDS-LDH is close to that of KH550-SDS-LDH.Surface properties of SDS-LDH are almost amphoteric,KH151-SDS-LDHs and KH550-SDS-LDHs are slightly basic,which is suitable for stuffing basic polymer.

关 键 词：锌铝水滑石 反相气相色谱法 复合改性 

分 类 号：O641[理学—物理化学]