Properties of Li exchanged tetrasilicic fluoro mica (Li-TSM) and synthesis of composites with antimicrobial and antifungal agents

Tetsuya Kishimoto, Hirotaka Fujimori, Koji Ioku, Seishi Goto

Research output: Contribution to journalArticle

Abstract

Synthetic mica has more high thermostability than natural mica and can be controlled expandability and cation-exchange-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 Al3+-fixation, and the CEC is controllable. When the CEC of Li-TSM had been controlled by partially fixation of Al3+ 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 (AI, 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°C where TBZ in TSM interlayer decomposed completely.

Original languageEnglish
Pages (from-to)303-307
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume113
Issue number1316
DOIs
Publication statusPublished - 2005 Apr

Keywords

  • Cation exchange capacity
  • Fixation
  • Layer charge
  • Synthetic mica
  • TBZ

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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