Changes of alkylammonium intercalated montmorillonite by ball-milling

• Main Authors: Yu-Chen Lee, 李育臣
• Other Authors: Shaw-Bing Wen
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/41293539705827649813

博士 === 國立成功大學 === 資源工程學系碩博士班 === 95 === An experimental study has been conducted to evaluate the changes of montmorillonite under various conditions, such as different chemical ion exchange, alkylammonium, solvent (water and kerosene), intercalation by mixing and stirred ball-milling. Initial montmorillonite sample was prepared from raw bentonite/clay mined in Taitung, Eastern Taiwan. By the purification processes, it belongs to good grade in general clay resources. For the different alkylammonium conditions, the final organic montmorillonite has been obtained via two different straight-chain organic alkylammonium of treatment, namely: C12NH3+ and C18NH3+. The microstructure of the raw material and the products were examined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The X-ray (XRD) results show that stirred ball-milling is an effective physical operation for breaking down the size of the clay particles and facilitating the intercalation of ammonium ions. The degree of the final products is noted that the increase in the layer space, from about 1.50 nm to 4.5 nm, and no obvious peak shape at 2θ = 2–10° over 72 hours. In order to achieve the commercial purpose, study on the effect of solvent (water and kerosene), intercalation by mixing and stirred ball-milling. The final product of exfoliated organic montmorillonite was obtained by treatment in water and kerosene systems. The optimum duration for stirred ball-milling was 6 h in both systems. In water the basal spacing increased gradually from 1.27 nm to 2.41 nm with dodecylammonium ions in the case of mixing and from 3.19 to 4.55 nm for dodecylammonium and hexadecylammonium ions during 2 h of ball-milling, respectively.