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作者:

Yu Chun-Xiao (Yu Chun-Xiao.) | Wei Qi (Wei Qi.) | Wang Yan-Li (Wang Yan-Li.) | Li Qun-Yan (Li Qun-Yan.) | Nie Zuo-Ren (Nie Zuo-Ren.) (学者:聂祚仁) | Zou Jing-Xia (Zou Jing-Xia.)

收录:

Scopus SCIE PKU CSCD

摘要:

Methyl-modified mesoporous silica membranes were prepared by acid catalyzed co-hydrolysis and condensation reaction of tetraethylorthosilicate (TEOS) and methyltriethoxysilane (MTES) in the presence of triblock copolymer poly (ethylene glycol)-B-poly (propylene glycol)-B-poly (ethylene glycol) (P123) in ethanol. The pore structure and hydrophobic property of the final materials were characterized by Nitrogen adsorption, FTIR, Si-29 MAS NMR and contact angle meter. The results show that modified silica membranes have a desirable pore structure, with a pore size of 4.65 nm, a pore volume of 0.69 CM3.g(-1) and a BET surface area of 938.4 m(2).g(-1), and tend to be hydrophobic with a water contact angle of 109 degrees +/- 1.1 degrees, as the molar ratio of MTES/TEOS increases to 1.0. Gas permeability test suggests that the gas transport into the membranes is governed by Knudsen diffusion mechanism.

关键词:

hydrophobic property mesoporous silica membrane pore structure

作者机构:

  • [ 1 ] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100022, Peoples R China

通讯作者信息:

  • [Wei Qi]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100022, Peoples R China

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来源 :

CHINESE JOURNAL OF INORGANIC CHEMISTRY

ISSN: 1001-4861

年份: 2007

期: 6

卷: 23

页码: 957-962

0 . 7 0 0

JCR@2022

ESI学科: CHEMISTRY;

JCR分区:4

被引次数:

WoS核心集被引频次: 5

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