Control of silica-alkyltrimethylammonium bromide mesophases with 1,3,5-trialkylbenzenes under acidic conditions

Ayumu Fukuoka, Izumi Kikkawa, Yukichi Sasaki, Atsushi Shimojima, Tatsuya Okubo*

*この研究の対応する著者

研究成果: Article査読

14 被引用数 (Scopus)

抄録

This article reports the structural variation of SBA-type mesostructured silica formed from a mixture of tetraethyl orthosilicate (TEOS), alkyltrimethylammonium bromides, and 1,3,5-trialkylbenzenes under acidic conditions. Swollen 2D hexagonal mesophases were formed from the silica source and hexadecyltrimethylammonium bromide (C16TAB) with varying amounts of trimethylbenzene (TMB) and triethylbenzene (TEB), whereas drastic structural changes were observed with triisopropylbenzene (TIPB). Characterization by X-ray diffraction and transmission electron microscopy observation revealed that the mesophase was changed from hexagonal p6mm to cubic Pm3̄n to cubic Fm3̄m with increasing amounts of TIPB. Thus, the addition of TIPB leads to the preferential formation of spherical micelles rather than the swelling of rodlike micelles. When tetradecyltrimethylammonium bomide (C14TAB) was used, similar structural changes were triggeredbysmaller amountsof TIPB; however, almostnostructural change was observed when octadecyltrimethylammonium bromide (C18TAB) was used. These findings provide a better understanding of the roles of 1,3,5-trialkylbenzenes in the structural control of silica- alkyltrimethylammonium mesophases.

本文言語English
ページ(範囲)10992-10997
ページ数6
ジャーナルLangmuir
25
18
DOI
出版ステータスPublished - 2009 9 15
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 表面および界面
  • 分光学
  • 電気化学

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