低聚聚合物表面活性剂驱动的亚苯基桥连介孔材料的自组装及其物理化学性质。

Oligomeric polymer surfactant driven self-assembly of phenylene-bridged mesoporous materials and their physicochemical properties.

作者信息

Kapoor Mahendra P, Setoyama Norihiko, Yang Qihua, Ohashi Masataka, Inagaki Shinji

机构信息

Toyota Central R and D Laboratory, Inc., Nagakute, Aichi 480-1192, Japan, and CREST, Japan Science and Technology, Japan.

出版信息

Langmuir. 2005 Jan 4;21(1):443-9. doi: 10.1021/la0482249.

DOI:10.1021/la0482249

PMID:15620337

Abstract

The detailed synthesis of highly hydrophobic average pore benzene-bridged hybrid mesoporous silicas under an acidic medium is described. With the use of a 1,4-bis(triethoxysilane)benzene silsesquioxane precursor and biodegradable alkyl polyoxyethylene (Brij-56 or Brij-76) nonionic surfactant oligomers as supramolecular templates, no molecular scale periodicity was observed. The well-defined mesoporous materials could be synthesized with two-dimensional hexagonal (p6mm) symmetries. The textural and surface properties (adsorption isotherms of water and benzene vapors) were estimated and were compared to the analogous benzene-bridged mesoporous silica with molecular scale periodicity which was prepared using cationic surfactant under basic conditions. Different textural properties resulted for the two kinds of materials and revealed some important insights regarding the structure and nature of the materials.

摘要

描述了在酸性介质中高度疏水的平均孔径苯桥联杂化介孔二氧化硅的详细合成过程。使用1,4 - 双（三乙氧基硅烷）苯倍半硅氧烷前体和可生物降解的烷基聚氧乙烯（Brij - 56或Brij - 76）非离子表面活性剂低聚物作为超分子模板时，未观察到分子尺度的周期性。可以合成具有二维六方（p6mm）对称性的明确介孔材料。对其结构和表面性质（水和苯蒸气的吸附等温线）进行了评估，并与在碱性条件下使用阳离子表面活性剂制备的具有分子尺度周期性的类似苯桥联介孔二氧化硅进行了比较。两种材料具有不同的结构性质，揭示了关于材料结构和性质的一些重要见解。