ODPA-ODA型聚醚酰亚胺膜的预氧化机理  

Preoxidization mechanism of ODPA-ODA type polyetherimide membrane

作　　者：吴永红[1] 张兵[1,2] 石毅[1] 赵丹丹[1] 党晓龙[1] 王同华[2] 

机构地区：[1]沈阳工业大学石油化工学院,辽宁辽阳111003 [2]大连理工大学化工学院,辽宁大连116024

出　　处：《沈阳工业大学学报》2014年第3期280-285,共6页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(20906063);辽宁省自然科学基金资助项目(20102170);辽宁省高等学校优秀人才项目(LJQ2012010);精细化工国家重点实验室开放课题(KF1107)

摘　　要：为了开发新型高性能炭膜前驱体材料,研究了ODPA-ODA型聚醚酰亚胺膜经430~530℃空气氛围的预氧化机理.借助热重分析、红外光谱、元素分析及x-射线衍射等手段,分析了预氧化温度对预氧化膜的溶解度、柔韧度、表面官能团、元素质量分数及微观结构的影响.结果表明：优化预氧化过程是制备无缺陷高质量炭膜的关键.预氧化可提高热稳定性,形成的交联结构有利于提高残炭量和成膜性.随预处理温度的提高,交联程度提高,但当温度高于490℃时会发生过渡氧化.In order to develop the novel precursor materials with high performance for carbon membrane, the preoxidization mechanism of ODPA-ODA type polyetherimide membrane was investigated under air atmosphere from 430 ℃ to 530 ℃. With such methods as thermogravimetry,infrared spectroscopy,element analysis and x-ray diffraction,the effect of preoxidization temperature on the solubility,flexibility,surface functional groups,elemental weight fraction and microstructure of preoxidized membrane was analyzed. The results showthat the optimization of preoxidization process is the key step for preparing the defect-free carbon membrane with high performance. The preoxidization can improve the thermal stability,and the formed crosslinking structure is beneficial to improving the char yield and membrane-forming property. With increasing the pretreatment temperature,the crosslinking degree increases. However,the over oxidation will occur when the temperature is higher than 490 ℃.

关 键 词：聚醚酰亚胺 预氧化 微观结构 表征 前驱体 交联 炭膜 热稳定性 

分 类 号：TQ316.6[化学工程—高聚物工业]