聚咪唑基离子液体的制备及其对甲苯吸附性能的研究  

Preparation of polyimidazole ionic liquid and its adsorption performance for toluene

作　　者：罗方文 田旭娇 董娴[1,2] 梁隆超 陈卓 Luo Fangwen;Tian Xujiao;Dong Xian;Liang Longchao;Chen Zhuo(College of Chemistry and Material Science,Guizhou Normal University,Guiyang 550001;Key Laboratory of Atmospheric Fine Particles and Air Pollution Chemistry of Guiyang City,Guiyang 550001)

机构地区：[1]贵州师范大学化学与材料科学学院,贵阳550001 [2]贵阳市大气细粒子和大气污染化学重点实验室,贵阳550001

出　　处：《化工新型材料》2025年第4期214-219,共6页New Chemical Materials

基　　金：国家自然科学基金(22166013)。

摘　　要：通过阴离子交换反应,合成了阳离子为3-十四烷基-1-乙烯基咪唑(VIC _(14))和阴离子为四氟硼酸[BF_(4)]-、六氟磷酸[PF_(6)]^(-)、三氟甲磺酸[CF_(3)SO_(3)]^(-)、双三氟甲磺酰亚胺[NTf 2]-的4种离子液体,分别将它们与二乙烯基苯聚合,制备了4种聚咪唑基离子液体(PVIC_(14)-NTf_(2)、PVIC 14-CF_(3)SO_(3)、PVIC_(14)-PF 6和PVIC_(14)-BF 4),采用红外光谱(FT-IR)、X射线电子能谱(XPS)、扫描电镜(SEM)和BET比表面积及孔隙分析对结构进行表征,研究它们对甲苯的动态吸附性能、循环吸附性能和吸附机理。结果表明:阴离子为[NTf_(2)]-的聚离子液体对甲苯的吸附量最高,为454.5mg/g,其次为[CF_(3)SO_(3)]-,最低为[BF_(4)]^(-);采用高温氮气吹扫脱附对研究PVIC_(14)-NTf_(2)的循环吸附性能,循环吸脱附5次后,吸附量下降到431.8mg/g,总吸附效率的降低小于5%;对吸附过程进行拟合后发现吸附机理符合Bangham动力学模型和Langmuir等温吸附模型。Four ionic liquids with cation 3-tetradecyl-1-vinylimidazole(VIC_(14))and anions tetrafluoroborate[BF_(4)]-,hexafluorophosphoric acid[PF_(6)]-,trifluoromethanesulfonic acid[CF_(3)SO_(3)]-,and bis(trifluoromethanesulfonyl)[NTf_(2)]-were synthesized by anion-exchange reaction.These ionic liquids were then polymerized with divinylbenzene to obtain four polyimidazolyl ionic liquids(PVIC_(14)-NTf_(2),PVIC_(14)-CF_(3)SO_(3),PVIC_(14)-PF_(6) and PVIC_(14)-BF 4).Their structures were characterized by FT-IR,XPS,SEM,and BET,and the dynamic adsorption performance,cyclic adsorption performance and adsorption mechanism for toluene were investigated.It was found that the polyionic liquids with the anion of[NTf_(2)]-had the highest adsorption amount of toluene,reaching 454.5mg/g,followed by[CF_(3)SO_(3)]-and the lowest was[BF_(4)]-.The cyclic adsorption performance of PVIC_(14)-NTf_(2) was investigated by using high temperature nitrogen purge desorption,and the adsorption amount decreased to 431.8mg/g after cyclic adsorption and desorption five times,with a total adsorption efficiency reduction of less than 5%.Fitting of the adsorption process revealed that the adsorption mechanism was in accordance with Bangham s kinetic model and Langmuir isothermal adsorption model.

关 键 词：咪唑基聚离子液体 阴离子 甲苯 循环吸附 吸附机理 

分 类 号：TQ424.3[化学工程]