摘要
利用共混交联法将马来酸酐(MAH)加入聚乙烯醇(PVA)和聚乙烯吡咯烷酮(PVP)混合溶液中制备PVA/PVP膜。考察了膜的组成、料液中水质量分数和温度对渗透汽化分离性能的影响。结果表明,在V(PVA)∶V(PVP)=8∶2、水质量分数为3.9%的2-甲基四氢呋喃(2-Me THF)溶液和最佳温度为68℃条件下,渗透通量和分离因子分别可达431.64 g/(m^(2)·h)和272.96。PVA/PVP膜能有效分离2-Me THF/水溶液。SEM、XRD、接触角、机械强度分析结果表明,交联后的PVA/PVP膜均匀致密,结晶度、水接触角明显降低,机械强度显著增强。
PVA/PVP crosslinked blend membranes are prepared by adding directly maleic anhydride( MAH) into a mixed solution of polyvinyl alcohol( PVA) and polyvinylpyrrolidone( PVP).Effects of PVA content,PVP content,mass fraction of water in 2-MeTHF solution and operating temperature on membranes’ pervaporation separation performance are studied.Results indicate that the permeation flux and separation factor of the membranes can reach 431. 64 g/( m^(2)·h)and 272. 96,respectively when V( PVA) ∶V( PVP) = 8 ∶2,2-MeTHF solution contains 3. 9 wt% of water,and the optimal temperature is at 68℃ . It is verified that the prepared PVA/PVP membranes can separate 2-MeTHF/water solution effectively.Analysis through SEM,XRD,contact angle and mechanical strength shows that the crosslinked PVA/PVP membranes are uniform and dense,with significantly reduced crystallinity and water contact angle,as well as significantly enhanced mechanical strength.
作者
刘艳花
王娜
王晓东
黄伟
LIU Yan-hua;WANG Na;WANG Xiao-dong;HUANG Wei(Key Laboratory of Coal Science and Technology of the Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《现代化工》
CAS
CSCD
北大核心
2021年第2期183-187,共5页
Modern Chemical Industry
基金
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)
省部共建煤炭高效利用与绿色化工国家重点实验室项目(2017-K15)。
