Guimarães JL, Wypych F
Department of Chemistry, Federal University of Paraná, Curitiba, PR, 81531-990, Brazil
J Colloid Interface Sci. 1999 Oct 1;218(1):211-216. doi: 10.1006/jcis.1999.6336.
Hydrated kaolinite phenylphosphonate (KPP-hyd) was reacted with hexylamine under ambient conditions. The reaction produced a stable light-yellow compound (KPP-hex) that was isolated and characterized by X-ray diffraction, thermal methods (simultaneous thermogravimetric and differential scanning calorimetric analysis), Fourier transform infrared spectroscopy, and elemental CHN analysis. The increase in the interlayer distance from 15.02 to 16.36 Å on going from KPP-hyd to KPP-hex was attributed to the replacement of water molecules with the longer hexylamine molecules in the phenylphosphonate P-O-H binding sites of the grafted KPP host. Upon heating, the phase KPP-hex release the hexylamine molecules that burn. The resulting KPP-dry is stable up to 498 degrees C, at which temperature the grafted phenylphosphonate begins to burn and the dehydroxilation of kaolinite takes place. Copyright 1999 Academic Press.
水合高岭石苯基膦酸酯（KPP-hyd）在环境条件下与己胺发生反应。该反应生成了一种稳定的浅黄色化合物（KPP-hex），对其进行了分离，并通过X射线衍射、热分析方法（同步热重分析和差示扫描量热分析）、傅里叶变换红外光谱以及元素CHN分析对其进行了表征。从KPP-hyd转变为KPP-hex时，层间距从15.02 Å增加到16.36 Å，这归因于在接枝的KPP主体的苯基膦酸酯P-O-H结合位点中，水分子被更长的己胺分子所取代。加热时，KPP-hex相释放出燃烧的己胺分子。所得的KPP-dry在高达498摄氏度时是稳定的，在此温度下接枝的苯基膦酸酯开始燃烧，高岭石发生脱羟基作用。版权所有1999年学术出版社。
