Spiral-wound polyaniline membrane modules for organic solvent nanofiltration (OSN)
Spiral-wound polyaniline membrane modules for organic solvent nanofiltration (OSN)
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DOI：
10.1016/j.memsci.2009.11.039
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发表时间：
2010-03-01
影响因子：
9.5
通讯作者：
Livingston, A. G.
中科院分区：
文献类型：
--
作者：
Sairam, M.;Loh, X. X.;Livingston, A. G.
报道了由聚苯胺(PANT)制成的溶剂稳定的整体蒙皮不对称纳滤膜的螺旋缠绕组件。采用相转化法制备了PANT膜，并通过化学和热法对其进行了交联。在化学交联法中，用1.8英寸的戊二醛对浇铸在丙纶非织造布衬里上的PANT膜进行了交联。制备了螺旋缠绕模组。要使薄膜热交联膜，需要1.8英寸。将涤纶非织造布衬底上浇铸成的PANT膜制成螺旋缠绕膜组件，在180℃下加热2 h，制得的膜组件在丙酮、四氢呋喃和N，N-二甲基甲酰胺等有机溶剂中稳定。在丙酮、四氢呋喃和二甲基甲酰胺中进行过滤，在纳滤范围内具有稳定的渗透通量和良好的分离性能。膜的截留分子量(MWCO)取决于溶剂的性质和温度。在30℃时，不同溶剂中的PANT膜的相对分子质量在150到300克摩尔(-1)之间。在65℃或更高的高温下，膜也被发现是稳定的。这些膜即使在干燥后仍保持其纳滤性能，因此可以避免使用调理剂或防腐剂。(C)2009爱思唯尔B.V.保留所有权利。
Spiral-wound modules of solvent stable integrally skinned asymmetric nanofiltration membranes made from polyaniline (PANT) are reported. PANT membranes were made by phase inversion and crosslinked by chemical and thermal processes. In the chemical crosslinking process, PANT membrane cast on polypropylene non-woven backing was crosslinked using glutaraldehyde, and a 1.8 in. spiral-wound module was prepared. To crosslink membranes thermally, a 1.8 in. spiral-wound membrane module prepared from PANT membrane cast on polyester non-woven backing was heated at 180 degrees C for 2 h. The resultant membranes and modules were found to be stable in various organic solvents including acetone, tetrahydrofuran and N,N-dimethyl formamide. Filtrations carried out in acetone, tetrahydrofuran and dimethyl formamide gave stable permeate fluxes and good separation performances in the nanofiltration range. Molecular weight cut-off (MWCO) of the membranes was dependent on the nature of the solvent and temperature. MWCO of PANT membranes in different solvents was found to lie between 150 and 300 g mol(-1) at 30 degrees C. The membranes were also found to be stable for operations at elevated temperatures up to 65 degrees C and possibly higher. These membranes retain their nanofiltration properties even after drying so the use of conditioning or preservative agents can be avoided. (C) 2009 Elsevier B.V. All rights reserved.