Diffusion and Flow Across Nanoporous Polydicyclopentadiene-Based Membranes
Diffusion and Flow Across Nanoporous Polydicyclopentadiene-Based Membranes
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DOI：
10.1021/am8001428
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发表时间：
2009-02-01
影响因子：
9.5
通讯作者：
Cussler, Edward L.
中科院分区：
文献类型：
--
作者：
Phillip, William A.;Amendt, Mark;Cussler, Edward L.
我们报告了通过具有 40% 空隙（由 14 nm 孔组成）的膜进行的气体和液体传输测量。反应性聚丙交酯-聚降冰片烯基乙基苯乙烯嵌段聚合物在成膜过程中用作二环戊二烯聚合的结构模板。膜浇铸后，通过使用稀碱水溶液蚀刻聚丙交酯组分来形成孔结构。孔隙结构是各向同性的，因此不需要特殊的排列技术。克努森扩散实验和水流实验显示孔隙的曲折度为1.81，尺寸为14 nm，其直径与氮吸附和小角X射线散射测量一致。这些膜对于超滤是有效的，可通过改变模板共聚物中的组成嵌段的尺寸来调节。
We report gas and liquid tranport measurements through membranes that have 40% voids made of 14 nm pores. a reactive polylactide-polynorborneenylethylstyrene block polymer is used as a structural template in the polymerization of dicyclopentadiene during the membrane formation process. After the membrane is cast, the pore structure is formed by etching the polylactide component using dilute aqueous base. The pore structure is isotropic therefore, therefore, there is no need for special alignment techniques Knudsen diffusion experiments and water flow experiments show pores with a tortuosity of 1.81 and a size of 14 nm, a diameter consistent with nitrogen adsorption and small angle X-ray scattering measurements. These membranes are effective for ultrafiltration, tuned by changing the size of the constituent blocks in the templating copolymer.