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Membrane Separation

Membrane Separation. Lou Liya 2013.09 . 27. 摘要. 对比界面聚合时间对所制备纳滤膜通量和截留率的影响， SEM 表征其横截面结构。. 制备步骤. 25% 的 PEI 刮在无纺布上 250μm 在 10 ℃的水中浸 1h 用 5% （ w/v ）乙二胺甲醇溶液交联 30min 用清水去除膜表面的残留液体，最后用去离子水清洗膜表面，用滤纸把膜表面擦干 用 2% （ w/v ） MPD 浸 2min ，在空气中晾干 用 0.1% （ w/v ） TMC 浸 1/2min ，在通风橱中吹干

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Membrane Separation

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  1. Membrane Separation Lou Liya 2013.09.27

  2. 摘要 对比界面聚合时间对所制备纳滤膜通量和截留率的影响，SEM表征其横截面结构。

  3. 制备步骤 • 25%的PEI刮在无纺布上250μm • 在10℃的水中浸1h • 用5%（w/v）乙二胺甲醇溶液交联30min • 用清水去除膜表面的残留液体，最后用去离子水清洗膜表面，用滤纸把膜表面擦干 • 用2% （w/v）MPD浸2min，在空气中晾干 • 用0.1% （w/v）TMC浸1/2min，在通风橱中吹干 • 在烘箱中100℃下干燥20min

  4. 界面聚合1min，纳滤膜的通量和截留率 图1.2.2MPa下制备的纳滤膜

  5. 界面聚合2min，纳滤膜的通量和截留率 图2.1.8MPa下制备的纳滤膜

  6. a SEM (a)界面聚合1min膜的横截面;(b) a的局部放大图 b

  7. SEM a b (a)界面聚合2min，膜的横截面；(b) a图中的局部放大图

  8. 结论 1.界面聚合2min的纳滤膜比界面聚合1min的纳滤膜的截留 率有所提高； 2.界面聚合2min的纳滤膜的中间层呈指状孔。

  9. 下一步工作计划 从SEM图可以看出，PEI中间层较厚，这也是通量较低的原因之一，所以考虑把PEI减薄到200μm。

  10. Thank you!

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