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采用有机硅烷(氨丙基三乙氧基硅烷)对蒙脱石及其酸化土进行嫁接改性,制备了有机硅嫁接蒙脱石,并利用X射线衍射(XRD)、傅里叶转换红外光谱(FTIR)和热重分析(TG)等技术对有机硅嫁接蒙脱石的结构进行了表征.XRD结果表明,有机硅烷嫁接产物的层间距明显增大,说明有机硅烷进入了蒙脱石及其酸化土的层间,并以双层排列方式存在于蒙脱石及其酸化土的层间域内.TG结果表明,酸化处理会降低蒙脱石的热稳定性,但通过对其进行有机硅烷嫁接改性后,不仅能够提高产物的热稳定性,而且能够改变蒙脱石及其酸化土表面与端面的亲和性.
The montmorillonite and its acidified soil were grafted and modified with organosilane (aminopropyltriethoxysilane). Silicone grafted montmorillonite was prepared and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TG) were used to characterize the structure of the organosilicone grafted montmorillonite.The results of XRD showed that the interlayer spacing of the organosilane grafted product increased obviously, indicating that the organosilane entered the montmorillonite and its Acidified soil layers and exists in a double-layer arrangement in the interlamellar domain of montmorillonite and its acidified soil.The TG results show that the acidification treatment will reduce the thermal stability of the montmorillonite, but by organosilane grafting After modification, not only can improve the thermal stability of the product, but also can change the affinity of montmorillonite and its acidified soil surface to the end surface.