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题名: Interfacial morphology between the two layers of the dual-layer asymmetric hollow fiber membranes fabricated by co-extrusion and dry-jet wet-spinning phase-inversion techniques
作者: Ding, Xiaoli1;  Cao, Yiming2;  Zhao, Hongyong1;  Wang, Lina2
关键词: Dual-layer ;  Interface ;  Dope composition ;  Demix ;  Mass transfer resistance
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2013-10-01
DOI: 10.1016/j.memsci.2013.03.035
卷: 444, 页:482-492
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Engineering, Chemical ;  Polymer Science
研究领域[WOS]: Engineering ;  Polymer Science
英文摘要: The dual-layer asymmetric hollow fiber membranes were fabricated with Matrimid (R) 5218 as the functional material by using co-extrusion and dry-jet wet-spinning phase-inversion techniques. Different polymers polysulfone (PSf), polyethersulfone (PES) and polyetherimide (PEI), were used as support materials. Different organic solvents N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc), and dimethylformamide (DMF) were used as solvents in the inner layer spinning dopes. The precipitation order of the two layers was estimated from the cloud point curves for the respective systems. The purpose of this paper was to give out a method to control the interface structure of the dual-layer asymmetric hollow fiber membranes. The experimental result shows that if the inner spinning dope demixes prior to the outer spinning dope, dense skin will form both on the outer surfaces of the two layers, while if the outer spinning dope demixes prior to the inner spinning dope, the dense skin on the outer surface of the outer layer will prevent the formation of the dense skin on the outer surface of the inner layer. The skin morphology investigated by scanning electron microscopy (SEM) proves this result. The double dense skin structure of membranes increases the mass transfer resistance and decreases the gas permeance. (C) 2013 Elsevier BY. All rights reserved.
关键词[WOS]: GAS SEPARATION PERFORMANCE ;  DENSE-SELECTIVE LAYER ;  MIXED-MATRIX MATERIALS ;  DEFECT-FREE ;  OLEFIN/PARAFFIN SEPARATION ;  POLYSULFONE MEMBRANES ;  POLYMER-SOLUTIONS ;  POLYIMIDE ;  DISTILLATION ;  PURIFICATION
语种: 英语
WOS记录号: WOS:000321749200049
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137614
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Tianjin Polytech Univ, State Key Lab Hollow Fiber Membrane Mat & Proc, Tianjin 300387, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Ding, Xiaoli,Cao, Yiming,Zhao, Hongyong,et al. Interfacial morphology between the two layers of the dual-layer asymmetric hollow fiber membranes fabricated by co-extrusion and dry-jet wet-spinning phase-inversion techniques[J]. JOURNAL OF MEMBRANE SCIENCE,2013,444:482-492.
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