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表面喷雾NN-二甲基乙酰胺/水-浸没沉淀相转化法制备PVDF多孔膜的结构和性能

王晨洋 徐浪 成世杰 帅旗 左丹英

王晨洋, 徐 浪, 成世杰, 等. 表面喷雾N,N-二甲基乙酰胺/水-浸没沉淀相转化法制备PVDF多孔膜的结构和性能[J]. 功能高分子学报,2022,35(3):1-7 doi: 10.14133/j.cnki.1008-9357.20210719001
引用本文: 王晨洋, 徐 浪, 成世杰, 等. 表面喷雾NN-二甲基乙酰胺/水-浸没沉淀相转化法制备PVDF多孔膜的结构和性能[J]. 功能高分子学报,2022,35(3):1-7 doi: 10.14133/j.cnki.1008-9357.20210719001
WANG Chenyang, XU Lang, CHENG Shijie, SHUAI Qi, ZUO Danying. Structure and Performance of PVDF Porous Membrane Prepared by Surface Spraying DMAc/H2O-Immersion Precipitation Phase Inversion Method[J]. Journal of Functional Polymers. doi: 10.14133/j.cnki.1008-9357.20210719001
Citation: WANG Chenyang, XU Lang, CHENG Shijie, SHUAI Qi, ZUO Danying. Structure and Performance of PVDF Porous Membrane Prepared by Surface Spraying DMAc/H2O-Immersion Precipitation Phase Inversion Method[J]. Journal of Functional Polymers. doi: 10.14133/j.cnki.1008-9357.20210719001

表面喷雾NN-二甲基乙酰胺/水-浸没沉淀相转化法制备PVDF多孔膜的结构和性能

doi: 10.14133/j.cnki.1008-9357.20210719001
基金项目: 湖北省自然科学基金(2020 CFB799);湖北省大学生创新训练计划(S202010495004)
详细信息
    作者简介:

    王晨洋(1996—),男,硕士,主要研究方向为高分子分离膜材料。 E-mail:1010474282@qq.com

    通讯作者:

    左丹英, E-mail: zdy@wtu.edu.cn

  • 中图分类号: TQ028.8,O631.4

Structure and Performance of PVDF Porous Membrane Prepared by Surface Spraying DMAc/H2O-Immersion Precipitation Phase Inversion Method

  • 摘要: 在刮制的聚偏氟乙烯(PVDF)铸膜液上喷雾NN-二甲基乙酰胺/水(DMAc/H2O)混合溶液进行表面凝胶,随后将表面凝胶的液膜浸入凝固浴中进行沉淀相转变成PVDF多孔膜。考察了喷雾中DMAc的体积分数(φ(DMAc))对平板PVDF多孔膜结构和性能的影响。结果显示,随着φ(DMAc)增加,膜上表面的β晶含量逐渐减少,α晶含量逐渐增多,但是膜总体的结晶度逐渐增加,孔隙率和平均孔径先增加后减小。通过扫描电镜观察,喷雾了DMAc/H2O混合溶液的PVDF膜上表面为多孔皮层,且随着φ(DMAc)的增加,上表面球形晶粒在逐渐增加,断面由指状大孔结构转变为海绵状孔结构。当喷雾中φ(DMAc)为30%时,膜的水通量和牛血清白蛋白(BSA)截留率达到最大。

     

  • 图  1  PVDF膜上表面的红外谱图

    Figure  1.  FT-IR spectra of the top surface of PVDF membranes

    图  2  PVDF膜的(a)WAXD谱图和(b)DSC谱图

    Figure  2.  (a) WAXD spectra and (b) DSC curves of PVDF membranes

    图  3  PVDF膜的SEM图

    Figure  3.  SEM image of PVDF membranes

    图  4  (a)PVDF膜的水通量随时间的变化;(b)PVDF膜的孔隙率、膜厚与水通量的关系

    Figure  4.  (a) Water flux of PVDF membrane changes with time; (b) Relationship between porosity, film thickness and water flux of PVDF membrane

    图  5  PDVF膜的BSA截留率

    Figure  5.  BSA rejection rate of PDVF membrane

    表  1  PVDF膜的孔隙率和平均孔径

    Table  1.   Porosity and average pore size of PVDF membrane

    SamplePorosity /%Average pore size/nm
    PM090650
    PM291808
    PM389915
    PM484762
    下载: 导出CSV

    表  2  PVDF膜的熔点、热焓和结晶度

    Table  2.   Melting point, enthalpy and crystallinity of PVDF membrane

    SampleTm /°CΔH/(J·g−1)Crystallinity/%
    DSCWAXD
    PM0162.934.8333.339.3
    PM2162.735.5233.939.5
    PM3162.635.6534.141.7
    PM4162.536.7335.146.1
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-07-19
  • 录用日期:  2021-12-03
  • 网络出版日期:  2021-12-10

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