PEFT聚酯的制备及PEFT纳滤膜的截留性能  

Preparation of PEFT polyester and retention performance of PEFT nanofiltration membrane

作　　者：苏坤梅[1,2] 赵冬生 李振环[2] 张马亮[4] SU Kunmei;ZHAO Dongsheng;LI Zhenhuan;ZHANG Maliang(School of Pharmaceutical Sciences,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Green Chemical Technology and Process Engineering,Tiangong University,Tianjin 300387,China;School of Chemical Engineering and Technology,Tiangong University,Tianjin 300387,China;School of Material Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学药学院,天津300387 [2]天津工业大学天津市绿色化学技术与工艺工程重点实验室,天津300387 [3]天津工业大学化学工程与技术学院,天津300387 [4]天津工业大学材料科学与工程学院,天津300387

出　　处：《天津工业大学学报》2024年第1期1-9,共9页Journal of Tiangong University

基　　金：国家自然科学基金面上资助项目(21878231);天津市应用基础与前沿技术研究计划重点资助项目(22JCZDJC001100)。

摘　　要：为了解决聚对苯二甲酸乙二醇酯(PET)材料制品使用后降解缓慢和聚2,5-呋喃二甲酸二甲酯(PEF)韧性差的问题,开发一种新型嵌段共聚酯聚2,5-呋喃二甲酸-乙二醇-co-对苯二甲酸酯(PEFT),可通过酯交换-熔融缩聚法合成,且PEFT拥有与PEF相媲美的热力学性能。利用FTIR及NMR等对聚酯结构进行表征,结果表明该方法成功制备了PEFT聚酯。通过TG、DSC和紫外光照表征,结果表明PEFT聚酯热学性能优良,且在紫外光照射下可快速降解。又将PEFT聚酯材料通过非溶剂致相分离法(NIPS)制备了不同铸膜液浓度的PEFT纳滤膜,用于对染料离子及金属盐溶液的截留,而后对其表面粗糙度、水接触角、荷电性、染料和金属盐离子的截留能力等方面进行了测试。结果表明:PEFT纳滤膜对甲基蓝(Mr=799.8)染料、酸性品红(Mr=585.4)染料都具有良好的截留性能,最高截留率可达99%和87.7%,并且纳滤膜经长期循环后仍具有较高的稳定性,但对金属盐(MgSO4)溶液截留性能不佳,截留率最高不超过35%。综合研究发现PEFT纳滤膜在染料截留方面性能突出。In order to solve the problems of slow degradation of polyethylene terephthalate(PET) material products after use and poor toughness of polyethylene 2,5-furandicarboxylate(PEF),a novel block copolyester poly-2,5-furandicarboxylic acid-ethylene glycol-co-terephthalate(PEFT) is developed,which can be synthesized by exchangemelt polycondensation,and PEFT possesses thermodynamic properties comparable to PEF.The structure of polyester is characterized by FTIR and NMR,and the results show that PEFT polyester is successfully prepared by this method.Thermal properties of PEFT polyester were characterized by TG,DSC,and UV irradiation,the results show that PEFT polyester has excellent thermal properties and can be rapidly degraded under UV light irradiation.In addition,PEFT polyester materials are prepared by non-solvent-induced phase separation(NIPS)to prepare PEFT nanofiltration membranes with different conce-ntrations of casting liquids,which are used for the retention of dye ions and metal salt solutions,and then the surface roughness,water contact angle,chargeability,retention capacity of dye ions and metal salt ions are tested.The results show that PEFT nanofiltration membrane has good retention performance for methyl blue(Mr = 799.8) dye and acid fuchsin(Mr = 585.4) dye.the highest retention rate can reach 99% and 87.7%,and the nanofiltration membrane still has high stability after long-term circulation.The retention performance of metal salt(Mg SO4) solution is not good,and the maximum retention rate dese not exceed 35%.Overall,the PEFT nanofiltration membrane showed excellent performance in dye retention.

关 键 词：呋喃基聚酯 熔融缩聚 纳滤膜 染料截留 降解 

分 类 号：TS102.54[轻工技术与工程—纺织工程] TQ028.8[轻工技术与工程—纺织科学与工程]