添加物尺寸对ZIF-71/PEBA2533/PTFE膜结构及其分离性能的影响  

Effect of additive size on structure and separation performance of ZIF-71/PEBA/PTFE MMMs

作　　者：郝鹏[1] 霍宇辰 王晓东[1] 黄伟[1] HAO Peng;HUO Yu-chen;WANG Xiao-dong;HUANG Wei(State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学省部共建煤基能源清洁高效利用国家重点实验室,山西太原030024

出　　处：《现代化工》2022年第7期147-151,共5页Modern Chemical Industry

基　　金：国家重点研发计划资助项目(2020YFB0606405);2014年度山西省煤基重点科技攻关项目(MH2014-10);山西省回国留学人员科研资助项目(2017-047)。

摘　　要：以合成的颗粒尺寸为140 nm×450 nm×1μm的ZIF-71晶体为添加物、PEBA2533为有机基质,在PTFE载体上制备了一系列ZIF-71/PEBA2533/PTFE混合基质膜,并利用SEM、XRD和FT-IR等表征方法研究不同尺寸ZIF-71晶体及相应膜材料的形貌和结构,探究ZIF-71颗粒尺寸对膜材料结构的调节作用,同时将膜材料应用于苯酚-水溶液的分离。结果表明,小尺寸的ZIF-71晶体在膜中分布均匀且未发生团聚,但当添加物颗粒尺寸较大时会发生团聚现象。掺杂小尺寸ZIF-71颗粒可同时提高膜材料的苯酚通量和分离因子。ZIF-71 crystals with a crystal size of 140 nmx450 nmx1 μm are synthesized.A series of ZIF-71/PEBA2533/PTFE mixed matrix membranes(MMMs) are prepared on PTFE carrier with ZIF-71 as the additive and PEBA2533 as the organic matrix.The morphology and structure of ZIF-71 crystals and corresponding MMMs are characterized by means of SEM,XRD,and FTIR-ATR.The adjustment effect of ZIF-71 particle size on the structure of MMMs is explored.The ZIF-71-based MMMs are applied to phenol-water solution separation.It is found that small particles of ZIF-71 crystals distribute evenly in the MMMs without any agglomeration.There happens to agglomeration when large ZIF-71 particles are added in the MMMs.MMMs loaded with small particles of ZIF-71 shows higher phenol flux and separation factor.

关 键 词：渗透汽化 苯酚 ZIF-71/PEBA2533混合基质膜 

分 类 号：O614[理学—无机化学]