主链含咪唑环介孔聚酰亚胺气凝胶的制备及其CO_(2)吸附性能  

Preparation of mesoporous polyimide aerogels with imidazole in backbone and its CO_(2) adsorption performance

作　　者：高阳峰 张范 马红卫 李杨[1] GAO Yang-feng;ZHANG Fan;MA Hong-wei;LI Yang(State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,China;SinochemHongrun Weifang Hongrun New Material Co Ltd,Weifang 261108,China)

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116024 [2]中化弘润潍坊弘润新材料有限公司,山东潍坊261108

出　　处：《石化技术与应用》2022年第6期398-405,共8页Petrochemical Technology & Application

摘　　要：以2,2′-二甲基-4,4′-二氨基联苯(DMBZ)为二胺单体、1,3,5-三(4-胺基苯氧基)苯(TAB)为交联剂、2-(3-胺基苯基)-5-胺基苯并咪唑(ABIA)为第3共聚单体,通过调控DMBZ/ABIA(摩尔比),在乙酸酐/吡啶的催化作用下,分别与3,3′,4,4′-联苯四酸二酐进行缩聚反应,制备出系列主链含咪唑环的介孔共聚酰亚胺气凝胶材料。并对其结构进行了分析表征,考察了其CO_(2)吸附性能。结果表明:该气凝胶材料不仅耐热性较高,热分解温度均在510℃以上,而且当ABIA摩尔分数为100%时,气凝胶试样的5%热分解温度最高,达到了569.33℃。此外该气凝胶材料还具有较高的CO_(2)吸附性能,当ABIA摩尔分数为50%时,气凝胶试样对CO_(2)的吸附量最大,高达14.8 cm^(3)/g。A series of mesoporous copolyimide aerogel with imidazole ring in the backbone and corresponding aerogel bulk materials were prepared under the conditions as followed:by using 2,2′-dimethyl-4,4′-diaminobiphenyl(DMBZ)as diamine monomer,using 1,3,5-tri(4-aminophenoxy)benzene(TAB)as cross-linking agent,and using 2-(3-aminophenyl)-5-aminophenyl benzimidazole(ABIA)as the3rdcopolymer,by regulating the molar ratio of DMBZ to ABIA,via the polycondensation reactions with 3,3′,4,4′-biphenyl tetrachlorate dianhydride,along with the catalytic effect of acetic anhydride/pyridine,respectively.Then,their structures were characterized and their CO_(2)adsorption performance were tested.The results showed that:the aerogel materials not only had the high thermal resistance,with the thermal decomposition temperature at above 510℃,but also when the molar fraction of ABIA was at 100%,the 5%thermal decomposition temperature of this aerogel sample was the highest and reached 569.33℃.In addition,the aerogel material also had high CO_(2)adsorption performance,when the molar fraction of ABIA was at 50%,the CO_(2)adsorption capacity of the aerogel sample was the largest at 14.8 cm^(3)/g.

关 键 词：CO_(2)吸附 介孔聚酰亚胺 块体材料 吸附剂 有机聚合物气凝胶 缩聚反应 

分 类 号：TQ[化学工程]