文献类型：期刊文献

英文题名：Porous aromatic frameworks of co-cured diethynylbenzene (DEB) and vinyltrimethoxysilane (VTMS) with good thermo-oxidative stability

作者：Yu, Xiaoxiao[1];Yu, Ruobing[1];Li, Qianqian[1];Jiao, Zheng[2]

机构：[1]East China Univ Sci & Technol, Dept Mat Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[2]Shanghai Univ, Dept Environm & Chem Engn, Shanghai 200436, Peoples R China

年份：2017

卷号：26

期号：6

起止页码：413

外文期刊名：IRANIAN POLYMER JOURNAL

收录：;EI(收录号：20172503800364);WOS:【SCI-EXPANDED(收录号:WOS:000405416800003)】；

基金：This work was supported by the National Natural Science Foundation of China (contract Grant Number 51003030).

语种：英文

外文关键词：Porous aromatic framework; Diethynylbenzene; Vinyltrimethoxysilane; Co-curing; Adsorption

摘要：A series of new porous aromatic frameworks (PAA-VTMS) co-cured by diethynylbenzene (DEB) and vinyltrimethoxysilane (VTMS) have been described. Thermally treated PAA-VTMS were also investigated. When the ratio of DEB to VTMS was 1:1 (PAA-VTMS-4), it showed characteristic pores with uniform diameter, confirmed by scanning electron microscope (SEM) and transmission electron microscopy (TEM) analyses. The surface area of PAA-VTMS-4 was up to 457 m(2)/g and its pore size was 7 nm, related to the hyper-cross-linked structure with plentiful benzene units. The co-cured PAA-VTMS samples whose DEB/VTMS ratios were higher or less than 1:1 showed low surface area. CO2 uptake of PAA-VTMS-4 was 83 cm(3)/g at 0 degrees C and 72 cm(3)/g at 25 degrees C. The temperature of 5% weight loss of PAA-VTMS-4 was 388 degrees C in nitrogen and 346 degrees C in air. The surface area of the thermally treated sample (OPAA-VTMS-4) was decreased, but its CO2 uptake was as high as 115 cm(3)/g at 0 degrees C and 105 cm(3)/g at 25 degrees C. The OPAA-VTMS-4 sample almost did not decompose in N-2, and the temperature of its 5% weight loss was 450 degrees C in air. It showed that PAA-VTMS with its new porous aromatic framework can be used at high temperature.