超支化共聚聚酰亚胺膜制备及其CO_(2)/CH_(4)气体分离性能研究  

Preparation of hyperbranched copolyimide membrane and its CO_(2)/CH_(4)gas separation performance

作　　者：衣华磊 郭欣 杨涛 高鹏[1] 段翠佳 骆鑫雨 YI Hualei;GUO Xin;YANG Tao;GAO Peng;DUAN Cuijia;LUO Xinyu(CNOOC Research Institute,Beijing 100028,China;CenerTech Tianjin Chemical Research and Design Institute Co.,Ltd.,Tianjin 300130,China;Dalian University of Technology,Dalian 116081,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]中海油天津化工研究设计院有限公司,天津300130 [3]大连理工大学,大连116081

出　　处：《膜科学与技术》2023年第4期54-59,68,共7页Membrane Science and Technology

摘　　要：以4,4-六氟异丙基邻苯二甲酸酐(6FDA)和4,4′-二氨基二苯醚(ODA)为基体,通过加入不同比例的N,N,N′,N′-四(对氨基苯基)对苯二胺(NTPDA)四胺单体,采用热酰亚胺化法制备一系列超支化共聚聚酰亚胺膜(6FDA-ODA-NTPDA),通过红外光谱(FTIR)、热失重分析(TGA)、差示扫描量热法(DSC)、X-射线衍射(XRD)对膜结构进行了表征,并测试了薄膜对CO_(2)/CH_(4)气体渗透性能和分离性能.结果表明,当四胺摩尔分数为5‰时,膜的CO_(2)渗透系数较纯膜(6FDA-ODA)提升117.32%,CO_(2)/CH_(4)选择性较纯膜提升78.5%.Adding different proportions of N,N,N',N'N'-tetra(p-aminophenyl)p-phenylenediamine(NTPDA)tetramine monomers into the 4,4-hexafluoro-isopropyl phthalic anhydride(6FDA)and 4,4'-diamino-diphenyl ether(ODA)polyimide(6FDA-ODA),a series of hyperbranched copolyimide membranes(6FDA-ODA-NTPDA)were prepared by thermal imimide method.The structure,thermal stability,Tg and crystallinity of the membranes were characterized by infrared spectroscopy(FTIR),thermogravimetric analysis(TGA),differential scanning calorimetry(DSC)and X-ray diffraction(XRD)respectively.The permeability and separation properties of the membranes for CO_(2)/CH gas were tested.The results showed that compared with the pure membrane(6FDA-ODA),when the tetramine mole fraction was 5%o,the CO_(2)permeability coefficient was increased by 117.32%and the CO_(2)/CH_(4)selectivity was increased by 78.5%.

关 键 词：超支化聚酰亚胺 气体分离 四胺 热酰亚胺化 

分 类 号：TQ028.8[化学工程]