以张家口宣化高岭土为原料,制备高岭石/二甲基亚砜( dimethylsulfoxide, DMSO)插层复合物。利用X射线衍射( X-ray diffraction, XRD ),傅里叶红外光谱( Fourier transform infrared spectracopy, FT-IR ),热重-差热分析( Thermogravimetric-differential thermal analysis, TG-DTA)对制备的复合物进行表征。其中,XRD和FT-IR显示二甲基亚砜分子已进入高岭石层间,使其层间距由0.718 nm增加至1.130 nm。 TG-DTA结果表明插层复合物热相变经历以下三个阶段：二甲基亚砜分子脱嵌(约199℃),脱羟基(约522℃),高岭石重结晶(997℃)。此外,依据表征结果推测二甲基亚砜分子在高岭石层间存在形式,构建了复合物体系的结构模型,并对高岭石/二甲基亚砜插层作用机理进行了讨论。
Kaolinite/DMSO intercalation complex was prepared with kaolin in Xuanhua, Zhangjiakou. X-ray diffraction ( XRD) , Fourier transform infrared spectracopy ( FT-IR) , Thermogravimetric-differential thermal analysis ( TG-DTA) were used to characterize the complex. Of which, XRD and FT-IR show that DMSO has already insert into interlayer of kaolinite, and the interlayer spacing expands from 0. 718 nm to 1. 130 nm. TG-DTA shows thermal transformation of complex goes through three phases de-intercalation of DMSO ( about 199 ℃) , dehydroxylation ( about 522 ℃) , recrystallization of kaolinite ( 997 ℃) . Moreover, the existing form of DMSO in the kaolinite layers has been surmised according to the characterization results, the structural modeling is constructed in terms of molecular dynamics simulation, and the kaolinite/DMSO intercalating mechanism is discussed.
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