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自从1921年凝胶首次由小分子制得以来,小分子凝胶研究已经有了一定的进展。特别是近几十年小分子凝胶在医药、化妆品、食品、卫生用品等各个领域应用,被人们广泛关注。但到目前为止,人们对基于表面活性剂的小分子凝胶的结构和生成机理,特别是水、有机溶剂和表面活性剂在形成小分子凝胶过程中的作用仍认识十分有限。可使用水、四氯化碳和三甲基十六烷基溴化铵(CTAB)制出了一种小分子凝胶,并根据滴定和XRD实验结果提出了水和四氯化碳协同增溶表面活性剂CTAB形成凝胶的机理。红外光谱与核磁共振实验结果证明CTAB在凝胶中通过分子堆砌形成准有序结构。
Since 1921 gel was first made from small molecules, small molecule gel studies have made some progress. Especially in recent decades, small molecule gels have attracted wide attention in various fields such as medicine, cosmetics, food and hygiene articles. So far, however, there is little understanding of the structure and mechanism of formation of small molecule gels based on surfactants, especially the role of water, organic solvents and surfactants in the formation of small molecule gels. A small molecule gel can be prepared using water, carbon tetrachloride and trimethylhexadecylammonium bromide (CTAB). Based on the titration and XRD results, it is proposed that water and carbon tetrachloride co-solubilize The mechanism by which surfactant CTAB forms a gel. Infrared spectroscopy and NMR experiments show that CTAB forms a quasi-ordered structure in the gel through molecular packing.