三苯胺基有机微孔聚合物的合成与气体吸附  

Synthesis and Gas Adsorption Properties of Triphenylamine-Containing Microporous Organic Polymers

作　　者：王振博 徐佳伟[1] 汪锋[1] WANG Zhenbo;XU Jiawei;WANG Feng(School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学化工与制药学院

出　　处：《武汉工程大学学报》2019年第5期409-414,共6页Journal of Wuhan Institute of Technology

基　　金：湖北省教育厅重点项目(D20181505)

摘　　要：以三苯胺(TPA)为基本构筑单元,分别选用三(4-乙炔基)苯胺(TEPA)和苯基三(4-乙炔基苯基)硅烷(TEPP)为共聚单体,通过Sonogashira-Hagihara反应合成2种有机微孔聚合物(MOPs)材料。采用傅里叶变换红外光谱、热失重分析仪、粉末X射线衍射、扫描电子显微镜对聚合物的结构和形貌进行表征。氮气吸附结果表明:聚合物TEPA-TPA和TEPP-TPA的BET比表面积分别为992 m^2·g-1和428 m^2·g^-1。由于聚合物骨架中含有TPA富氮基团,在273 K和113 kPa条件下TEPA-TPA表现出较好的CO2吸附能力(2.46 mmol·g^-1)以及适中的CO2/N2的选择性吸附系数(52)。这类MOPs材料具有优良的稳定性、高的比表面积和良好的CO2吸附性能,因此将在气体吸附与分离方面具有潜在的应用前景。Microporous organic polymers (MOPs) derived from triphenylamine(TPA) and triethynyl monomers such as tris(4-ethynylphenyl)amine(TEPA) and tris(4-ethynylphenyl)phenylsilane(TEPP) were synthesized via Sonogashira-Hagihara reaction. The molecular structures and morphology of the resulting MOPs were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, powder X-ray diffraction and scanning electron microscopy. The results of nitrogen adsorption indicate that Brunauer- Emmett-Teller (BET) surface areas of TEPA-TPA and TEPP-TPA reach 992 m^2·g^-1 and 428 m^2·g^-1, respectively. The incorporation of triphenylamine moieties into the polymer skeleton increases the number of electrons donating basic nitrogen sites in the porous frameworks. Thus, the triphenylamine-based polymer TEPA-TPA with higher surface area shows better CO2 uptake capacity of 2.46 mmol·g-1 and moderate CO2/N2 selectivity around 52 at 273 K and 113 kPa. Given the excellent thermal and chemical stability, high BET surface area, and impressive CO2 adsorption performances, these MOPs are promising candidates for potential applications in CO2 capture and sequestration.

关 键 词：三苯胺 有机微孔聚合物 Sonogashira-Hagihara偶联反应 吸附 分离 

分 类 号：TQ028[化学工程]