Perfluoro–coated Hydrophilic Membranes with Improved Selectivity
Most polymeric solvent dehydration pervaporation membranes are made from cross-linked hydrophilic polymers such as cellulose esters or polyvinyl alcohol. At low feed water concentrations, these membranes have very good water/ethanol selectivities. However, the membranes absorb water and swell signif...
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| Veröffentlicht in: | Industrial & engineering chemistry research 2013-01, Vol.52 (3), p.1141-1149 |
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| container_title | Industrial & engineering chemistry research |
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| creator | Huang, Yu Baker, Richard W Wijmans, J. G |
| description | Most polymeric solvent dehydration pervaporation membranes are made from cross-linked hydrophilic polymers such as cellulose esters or polyvinyl alcohol. At low feed water concentrations, these membranes have very good water/ethanol selectivities. However, the membranes absorb water and swell significantly at higher feed water concentrations, leading to a significant loss of selectivity. We have found that coating these hydrophilic membranes with a thin hydrophobic perfluoropolymer layer can effectively prevent the swelling of the underlying hydrophilic membranes. These coated membranes display a higher selectivity than either the hydrophilic base membrane or the perfluoro coating material alone, when measured with the same feed solution. This counterintuitive result is explained by analyzing the transport behavior of the coated membrane. |
| doi_str_mv | 10.1021/ie3020654 |
| format | Article |
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G</creator><creatorcontrib>Huang, Yu ; Baker, Richard W ; Wijmans, J. G</creatorcontrib><description>Most polymeric solvent dehydration pervaporation membranes are made from cross-linked hydrophilic polymers such as cellulose esters or polyvinyl alcohol. At low feed water concentrations, these membranes have very good water/ethanol selectivities. However, the membranes absorb water and swell significantly at higher feed water concentrations, leading to a significant loss of selectivity. We have found that coating these hydrophilic membranes with a thin hydrophobic perfluoropolymer layer can effectively prevent the swelling of the underlying hydrophilic membranes. These coated membranes display a higher selectivity than either the hydrophilic base membrane or the perfluoro coating material alone, when measured with the same feed solution. This counterintuitive result is explained by analyzing the transport behavior of the coated membrane.</description><identifier>ISSN: 0888-5885</identifier><identifier>EISSN: 1520-5045</identifier><identifier>DOI: 10.1021/ie3020654</identifier><language>eng</language><publisher>American Chemical Society</publisher><subject>Coating ; Ethyl alcohol ; Membranes ; Pervaporation ; Selectivity ; Solvents ; Swelling ; Thin films</subject><ispartof>Industrial & engineering chemistry research, 2013-01, Vol.52 (3), p.1141-1149</ispartof><rights>Copyright © 2012 American Chemical Society</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a325t-ddd223764d37f427cbaf8cec869b2bcaf4fc758b27ae24e86f6cdc45346b54533</citedby><cites>FETCH-LOGICAL-a325t-ddd223764d37f427cbaf8cec869b2bcaf4fc758b27ae24e86f6cdc45346b54533</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/ie3020654$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/ie3020654$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,777,781,2752,27057,27905,27906,56719,56769</link.rule.ids></links><search><creatorcontrib>Huang, Yu</creatorcontrib><creatorcontrib>Baker, Richard W</creatorcontrib><creatorcontrib>Wijmans, J. G</creatorcontrib><title>Perfluoro–coated Hydrophilic Membranes with Improved Selectivity</title><title>Industrial & engineering chemistry research</title><addtitle>Ind. Eng. Chem. Res</addtitle><description>Most polymeric solvent dehydration pervaporation membranes are made from cross-linked hydrophilic polymers such as cellulose esters or polyvinyl alcohol. At low feed water concentrations, these membranes have very good water/ethanol selectivities. However, the membranes absorb water and swell significantly at higher feed water concentrations, leading to a significant loss of selectivity. We have found that coating these hydrophilic membranes with a thin hydrophobic perfluoropolymer layer can effectively prevent the swelling of the underlying hydrophilic membranes. These coated membranes display a higher selectivity than either the hydrophilic base membrane or the perfluoro coating material alone, when measured with the same feed solution. This counterintuitive result is explained by analyzing the transport behavior of the coated membrane.</description><subject>Coating</subject><subject>Ethyl alcohol</subject><subject>Membranes</subject><subject>Pervaporation</subject><subject>Selectivity</subject><subject>Solvents</subject><subject>Swelling</subject><subject>Thin films</subject><issn>0888-5885</issn><issn>1520-5045</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqF0MtKAzEYBeAgCtbqwjeYjaCL0dwnXWqptlBRUNchkwtNmWlqMlPpznfwDX0SIxVXgquz-fg5_wHgFMFLBDG68pZADDmje2CAGIYlg5TtgwEUQpRMCHYIjlJaQggZo3QAbh5tdE0fYvh8_9BBddYU062JYb3wjdfFvW3rqFY2FW--WxSzdh3DJpsn21jd-Y3vtsfgwKkm2ZOfHIKX28nzeFrOH-5m4-t5qQhmXWmMwZhUnBpSOYorXSsntNWCj2pca-Wo0xUTNa6UxdQK7rg2mjJCec1ykCE4393NFV57mzrZ-qRt0-R6oU8S8REmDBFU_U8ZxzyPRHimFzuqY0gpWifX0bcqbiWC8ntS-Ttptmc7q3SSy9DHVf73D_cFpdt1og</recordid><startdate>20130123</startdate><enddate>20130123</enddate><creator>Huang, Yu</creator><creator>Baker, Richard W</creator><creator>Wijmans, J. 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Res</addtitle><date>2013-01-23</date><risdate>2013</risdate><volume>52</volume><issue>3</issue><spage>1141</spage><epage>1149</epage><pages>1141-1149</pages><issn>0888-5885</issn><eissn>1520-5045</eissn><abstract>Most polymeric solvent dehydration pervaporation membranes are made from cross-linked hydrophilic polymers such as cellulose esters or polyvinyl alcohol. At low feed water concentrations, these membranes have very good water/ethanol selectivities. However, the membranes absorb water and swell significantly at higher feed water concentrations, leading to a significant loss of selectivity. We have found that coating these hydrophilic membranes with a thin hydrophobic perfluoropolymer layer can effectively prevent the swelling of the underlying hydrophilic membranes. These coated membranes display a higher selectivity than either the hydrophilic base membrane or the perfluoro coating material alone, when measured with the same feed solution. This counterintuitive result is explained by analyzing the transport behavior of the coated membrane.</abstract><pub>American Chemical Society</pub><doi>10.1021/ie3020654</doi><tpages>9</tpages></addata></record> |
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| ispartof | Industrial & engineering chemistry research, 2013-01, Vol.52 (3), p.1141-1149 |
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| language | eng |
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| source | ACS Publications |
| subjects | Coating Ethyl alcohol Membranes Pervaporation Selectivity Solvents Swelling Thin films |
| title | Perfluoro–coated Hydrophilic Membranes with Improved Selectivity |
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