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Preparation and properties of PVDF composite hollow fiber membranes for desalination through direct contact membrane distillation
Hou, Deyin; Wang, Jun; Sun, Xiangcheng; Ji, Zhongguang; Luan, Zhaokun
2012
Source PublicationJOURNAL OF MEMBRANE SCIENCE
ISSN0376-7388
Volume405Pages:185-200
AbstractThe polyvinylidene fluoride (PVDF) composite hydrophobic hollow fiber membranes were fabricated for membrane distillation through non-solvent induced phase inversion by dispersing hydrophobic modified calcium carbonate nano-particles in the PVDF casting solution and using the mixture of LiCl and polyethylene glycol (PEG) as non-solvent additive. The influence of nano-particles on the spun hollow fiber membrane characteristics was investigated. The addition of hydrophobic nano-particles could optimize the sandwich-like morphology, narrow the pore size distribution, improve the membrane porosity and increase the membrane surface roughness and contact angle to some extent. The nano-particles also enhanced the crystallinity degree and thermal stability of the hollow fiber. In addition, the composite membranes presented stronger mechanical properties compared to the fiber without particles. During the desalination process of 3.5 wt% sodium chloride solution, the maximum transmembrane permeate flux about 46.3 kg/m(2) h with a lower thermal loss was obtained from the composite fiber when the hot feed inlet temperature and the cold distillate inlet temperature were at 80.5 degrees C and 20.0 degrees C, respectively. Furthermore, the composite membrane exhibited satisfying performance stability compared with the pure PVDF membrane in the 30 days continuous desalination experiments, indicating that the as-spun composite fiber may be of great potential to be utilized in MD process for desalination. (C) 2012 Elsevier B. V. All rights reserved.
Department环境水质学国家重点实验室
KeywordMembrane Distillation Composite Membrane Polyvinylidene Fluoride Calcium Carbonate Mechanical Properties
WOS IDWOS:000302782000021
Citation statistics
Cited Times:88[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/7812
Collection环境水质学国家重点实验室
Recommended Citation
GB/T 7714
Hou, Deyin,Wang, Jun,Sun, Xiangcheng,et al. Preparation and properties of PVDF composite hollow fiber membranes for desalination through direct contact membrane distillation[J]. JOURNAL OF MEMBRANE SCIENCE,2012,405:185-200.
APA Hou, Deyin,Wang, Jun,Sun, Xiangcheng,Ji, Zhongguang,&Luan, Zhaokun.(2012).Preparation and properties of PVDF composite hollow fiber membranes for desalination through direct contact membrane distillation.JOURNAL OF MEMBRANE SCIENCE,405,185-200.
MLA Hou, Deyin,et al."Preparation and properties of PVDF composite hollow fiber membranes for desalination through direct contact membrane distillation".JOURNAL OF MEMBRANE SCIENCE 405(2012):185-200.
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