冷等离子体辅助硅烷表面改性高岭石的研究

发布时间：2018-05-09 23:04

本文选题：高岭石 + 等离子体　；参考：《非金属矿》2017年01期

【摘要】：采用等离子体预先处理和硅烷偶联剂表面修饰法制备了硅烷-接枝高岭土。通过沉降特性、X射线衍射和红外光谱等分析表征方法,研究了等离子体对高岭石晶体结构和表面性质的影响。结果表明:经氧气等离子体处理后高岭土在水中分散性显著提高,红外光谱显示在3010 cm-1和2904 cm-1处产生了新的红外吸收峰,其表面化学性质发生变化。对比硅烷直接改性和等离子体预处理硅烷改性高岭土样,后者具有明显的甲基和乙烯基双键等乙烯基硅烷的红外吸收峰。可见等离子体预先处理可显著改善高岭石的反应活性,使其易与硅烷偶联剂发生接枝化学反应。
[Abstract]:Silane-grafted kaolin was prepared by plasma pretreatment and surface modification of silane coupling agent. The effect of plasma on the crystal structure and surface properties of kaolinite was studied by means of X-ray diffraction and infrared spectroscopy. The results showed that the dispersion of kaolin in water was improved significantly after oxygen plasma treatment. The infrared spectra showed that new infrared absorption peaks appeared at 3010 cm-1 and 2904 cm-1, and the surface chemical properties of kaolin were changed. Compared with the direct modification of silane and plasma pretreatment of silane modified kaolin, the latter has obvious infrared absorption peaks of vinyl silane such as methyl and vinyl double bond. It can be seen that plasma pretreatment can obviously improve the reaction activity of kaolinite and make it easy to react with silane coupling agent.
【作者单位】：河南理工大学化学化工学院;
【基金】：国家自然科学基金(51304074,51034006) 河南理工大学博士基金(648479) 河南省高等学校矿业工程材料重点学科开放实验室开放基金(MEM12-4)
【分类号】：TD985

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