Li 型フッ素四ケイ素雲母 (Li-TSM) の特性と抗菌抗かび剤との複合化

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Synthetic mica has more high thermostability than natural mica and can be controlled expandability and cationexchange-capacity (CEC) by changing magnitude of effective-layer-charge (ELC). In this study, we prepared lithium-type tetra silicic mica (Li-TSM) from Na-TSM by ion exchange method. This mica is one of the expansible synthetic fluoro mica but a few details had been attempted. The negative charge in silicate layer of Li-TSM can be controlled by adjusting the amount of Al^<3+>-fixation, and the CEC is controllable. When the CEC of Li-TSM had been controlled by partially fixation of Al^<3+> to Li-TSM ((Al, Li)-HTSM), their swelling ability increased and their introducable capacity of organic compounds into interlayer also increased more than Na-TSM. Furthermore, the composites of (Al, Ag)-HTSM, which is Ag^+ -exchanged complex from (Al, Li)-HTSM, and (Al, Ag)-HTSM-TBZ (thiazole) complex, which has antifungal activity, was synthesized. The rate of elution of Ag^+ from this TBZ composite was inhibited than (Al, Ag)-HTSM. We thought that this was caused by chelation of Ag^+ and TBZ in interlayer. These composites had an antimicrobial and antifungal activity and this activity was observed for samples heat-treated up to at 400℃ where TBZ in TSM interlayer decomposed completely.
社団法人日本セラミックス協会の論文
2005-04-01