Roll-to-roll dip coating of three different PIMs for Organic Solvent Nanofiltration
Roll-to-roll dip coating of three different PIMs for Organic Solvent Nanofiltration
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DOI：
10.1016/j.memsci.2018.04.046
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发表时间：
2018-07-15
影响因子：
9.5
通讯作者：
Livingston, Andrew G.
中科院分区：
文献类型：
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作者：
Cook, Marcus;Gaffney, Piers R. J.;Livingston, Andrew G.
在两种不同的支撑膜上制备了用于有机溶剂纳滤（OSN）的PIM-1、PIM-7和PIM-8复合膜。这两种支撑膜，PAN和交联的Ultem 1000，显示的孔径范围内的20-25 nm的气液孔隙率测定法的特征。在卷对卷中试生产线上通过浸涂形成厚度< 500 nm的PIM层。所得复合膜表现出典型的MWCO在500-800 g mol（-1）的区域。对于所有三种PIM，在交联Ultem 1000支撑膜上获得的涂层质量始终高于在PAN膜上获得的涂层质量。涂覆在交联Ultem 1000上的PIM复合膜在比PAN载体上的那些更宽的溶剂范围内是稳定的。在具有异构烷烃溶质的模型系统中的OSN测试证实，对聚合物主链的分子结构的操纵变化导致直链和支链烷烃异构体之间的较高分离因子。
PIM-1, PIM-7, and PIM-8 composite membranes have been fabricated for Organic Solvent Nanofiltration (OSN) on two different support membranes. Both support membranes, PAN and crosslinked Ultem 1000, displayed pore sizes within the range of 20-25 nm as characterised by gas liquid porometry. PIM layers of < 500 nm thickness were formed from dip coating on a roll-to-roll pilot line. The resultant composite membranes exhibited typical MWCOs in the region of 500-800 g mol(-1). The quality of coating obtained on the crosslinked Ultem 1000 support membrane was consistently higher for all three PIMs than that obtained on the PAN membrane. The PIM composite membranes coated on to crosslinked Ultem 1000 were stable in a wider range of solvents than those on the PAN support. OSN testing in a model system with isomeric alkane solutes verified that manipulated changes to the molecular architecture of the polymer backbone resulted in a higher separation factor between straight and branched alkane isomers.