Impacts of support membrane structure and chemistry on polyamide-polysulfone interfacial composite membranes
Impacts of support membrane structure and chemistry on polyamide-polysulfone interfacial composite membranes
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DOI：
10.1016/j.memsci.2009.03.024
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发表时间：
2009-07-01
影响因子：
9.5
通讯作者：
Hoek, Eric M. V.
中科院分区：
文献类型：
--
作者：
Ghosh, Asim K.;Hoek, Eric M. V.
在此，我们讨论了在具有不同物理和化学性质的多孔聚砜支撑体上，通过相同的界面聚合条件形成的聚酰胺薄膜的性能。聚砜支撑体是通过非溶剂诱导相分离（即浸没沉淀）形成的，采用了几种铸膜液和沉淀浴化学物质。手工浇铸的聚砜薄膜（以及一种商业聚砜膜）在纯水渗透率、葡聚糖截留率、水接触角和表面粗糙度统计数据方面表现出广泛的差异。这些结果，结合傅里叶变换红外光谱和扫描电子显微镜图像，证实了每种支撑体都提供了不同的皮层孔隙形态和化学性质。在其上形成的聚酰胺复合膜在膜形态、分离性能和界面性质方面表现出很大差异。渗透性更强、亲水性更好的支撑体产生了低渗透性的聚酰胺 - 聚砜界面复合膜，而孔隙率高、相对疏水性的支撑体则产生了渗透性更强的复合膜。提出了一个概念模型来解释聚砜支撑膜性质在聚酰胺界面聚合反应过程中的潜在影响以及聚酰胺 - 聚砜界面复合膜的所得特性。（C）2009爱思唯尔有限公司。保留所有权利。
Herein, we discuss the properties of polyamide thin films formed via identical interfacial polymerization conditions over porous polysulfone supports with different physical and chemical properties. Polysulfone supports were formed by nonsolvent induced phase separation (i.e., immersion precipitation) employing several casting solution and precipitation bath chemistries. Hand-cast polysulfone films (and a commercial polysulfone membrane) exhibited a wide range of pure water permeabilities, dextran rejections, water contact angles, and surface roughness statistics. These results, combined with FTIR spectra and SEM images, confirm that each support offered a different skin layer pore morphology and chemistry. Polyamide composite membranes formed thereon displayed widely varying film morphology, separation performance, and interfacial properties. More permeable, hydrophilic supports produced low permeability polyamide-polysulfone interfacial composite membranes, whereas highly porous, relatively hydrophobic supports produced more permeable composite membranes. A conceptual model was proposed to explain the potential impacts of polysulfone support membrane properties during the polyamide interfacial polymerization reaction and the resulting characteristics of polyamide-polysulfone interfacial composite membranes. (C) 2009 Elsevier B.V. All rights reserved.