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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
Source PublicationSEPARATION AND PURIFICATION TECHNOLOGY
ISSN1383-5866
Volume197Pages:178-188
AbstractFor 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.
KeywordPlasma Modification Pdms Coating Ethyl Acetate Membrane Distillation
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.seppur.2018.01.011
Indexed BySCI
Language英语
WOS KeywordVOLATILE ORGANIC-COMPOUNDS ; HYDROPHOBIC CERAMIC MEMBRANES ; HOLLOW-FIBER MEMBRANE ; DIRECT-CONTACT ; PERVAPORATION ; WATER ; REMOVAL ; SEPARATION ; MIXTURES ; SIMULATION
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational 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 IDWOS:000428973600020
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24148
Collection生化工程国家重点实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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