Nanoporous morphology control of polyethylene membranes by block copolymer blends
Nanoporous morphology control of polyethylene membranes by block copolymer blends
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DOI：
10.1039/c4ra01676a
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发表时间：
2014-09
期刊：
影响因子：
3.9
通讯作者：
H. Uehara;Makiko Kano;Hidekazu Tanaka;Satomi Kato;H. Masunaga;T. Yamanobe
中科院分区：
文献类型：
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作者：
H. Uehara;Makiko Kano;Hidekazu Tanaka;Satomi Kato;H. Masunaga;T. Yamanobe
通过对PE和聚苯乙烯（PS）组成的二嵌段共聚物进行蚀刻处理而制备的纳米多孔聚乙烯（PE）膜适用于各种装置的生物技术界面。孔径的常规控制受到嵌段组成或蚀刻条件的限制。在这项研究中，通过将上述基础共聚物（PE-b-PS）与PS均聚物或另一种含有更高PS含量的嵌段共聚物共混，可以增加可去除的PS组分。这些共混物的一系列薄膜在最佳条件下等温结晶，并进行温和蚀刻以制备纳米多孔膜。因此，所得纳米多孔膜具有优异的鲁棒性，这有利于更广泛的应用。与由纯基础共聚物制备的纳米多孔膜相比，通过共混具有较低分子量的 PS 均聚物，实现了精确孔径和大孔体积的理想组合，这也通过分子渗透测试得到证实。
Nanoporous polyethylene (PE) membranes prepared by etching treatment for diblock copolymers composed of PE and polystyrene (PS) are applicable for biotechnological interfaces of various devices. The conventional control of pore size is limited by block compositions or etching conditions. In this study, an increase in the removable PS component was enabled by blending the above base copolymer (PE-b-PS) with PS homopolymer or another block copolymer containing a greater PS content. A series of films of these blends were isothermally crystallized under the optimum conditions, and were mildly etched to prepare nanoporous membranes. Therefore, excellent robustness was achieved in the resultant nanoporous membranes, which is beneficial for wider applications. A desirable combination of precise pore dimensions and large pore volume was achieved by blending the PS homopolymer with lower molecular weight, compared to a nanoporous membrane prepared from pure base copolymer, which is also confirmed by molecular permeation tests.