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Modification of polyacrylonitrile membranes via plasma treatment followed by polydimethylsiloxane coating for recovery of ethyl acetate from aqueous solution through vacuum membrane distillation
Wu, Huanhuan1,2; Shen, Fei1,2; Su, Yi1; Chen, Xiangrong1; Wan, Yinhua1,2
2018-05-31
发表期刊SEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
卷号197页码:178-188
摘要For the recovery of ethyl acetate (EtAc) from aqueous solution via vacuum membrane distillation (VMD), hydrophobic porous membranes with high and stable separation performance were prepared by carbon tetra fluoride (CF4) plasma treatment on polyacrylonitrile (PAN) membrane followed by polydimethylsiloxane (PDMS) coating. The effects of plasma treatment conditions and PDMS contents on the morphology, surface porosity and separation performance of modified membranes were investigated. It was found that both the two modification operations increased the hydrophobicity of the PAN membrane. CF4 plasma treatment increased the hydrophobicity (the contact angle increased from 42 to 124 measured by 2.5 wt% EtAc solution), surface mean pore size (from 24.6 nm to 150.5 nm) and porosity (from 7% to 32.3%) of hydrophilic PAN membrane, suggesting that the CF4-modified membranes (PAN-C membranes) with high hydrophobicity could be used in VMD. Optimized PDMS coating on the PAN-C membranes (PAN-C-P membranes) further narrowed the pore size distribution but retained porous and hydrophobic surface. The PAN-C membranes were much less efficient and stable in separating EtAc from water comparing with the PAN-C-P ones. For instance, for the separation of 1 wt% EtAc/water mixture, the best VMD performance in this work was achieved by the PAN-C3-P3 membrane with a separation factor of 70 and a total flux of 7.85 kg/m(2) h (PSI = 542). Moreover, the PAN-C3-P3 membrane showed a very stable separation performance than that of the PAN-C3 membrane during a 90 h intermittent VMD operation, indicating a very promising application prospect for EtAc recycling.
关键词Plasma Modification Pdms Coating Ethyl Acetate Membrane Distillation
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.seppur.2018.01.011
收录类别SCI
语种英语
关键词[WOS]VOLATILE ORGANIC-COMPOUNDS ; HYDROPHOBIC CERAMIC MEMBRANES ; HOLLOW-FIBER MEMBRANE ; DIRECT-CONTACT ; PERVAPORATION ; WATER ; REMOVAL ; SEPARATION ; MIXTURES ; SIMULATION
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Founds of China(21106153) ; Solar Energy Initiative of the Chinese Academy of Sciences(KGCX2-YW-380) ; National High-Tech R&D Program of China(2012AA021202 ; 2014AA021005)
WOS记录号WOS:000428973600020
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24148
专题生化工程国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Wu, Huanhuan,Shen, Fei,Su, Yi,et al. Modification of polyacrylonitrile membranes via plasma treatment followed by polydimethylsiloxane coating for recovery of ethyl acetate from aqueous solution through vacuum membrane distillation[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2018,197:178-188.
APA Wu, Huanhuan,Shen, Fei,Su, Yi,Chen, Xiangrong,&Wan, Yinhua.(2018).Modification of polyacrylonitrile membranes via plasma treatment followed by polydimethylsiloxane coating for recovery of ethyl acetate from aqueous solution through vacuum membrane distillation.SEPARATION AND PURIFICATION TECHNOLOGY,197,178-188.
MLA Wu, Huanhuan,et al."Modification of polyacrylonitrile membranes via plasma treatment followed by polydimethylsiloxane coating for recovery of ethyl acetate from aqueous solution through vacuum membrane distillation".SEPARATION AND PURIFICATION TECHNOLOGY 197(2018):178-188.
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