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Nekaj možnih postopkov izdelave hidrofobnih in oleofobnih polimernih membran ter njihova uporaba = Hydrophobic and olephobic membrane usage and production processesDrev, Darko ; Panjan, JožePri nekaterih vrstah uporabe so zelo zaželene hidrofobne in oleofobne lastnosti membran. To daje takšnim membranam odločilno prednost pred drugimi materiali. Na podlagi prikazanega postopka izdelave ... PTFE-membran je razvidno, da njihove pore ne morejo biti manjše od pribl. 0,01 m. To pomeni, da tovrstne membrane ne moremo uporabljati pri zelo finih filtracijah (ultrafiltracija, reverzna osmoza). Poleg politetrafluoretilena imajo zelo izražene hidrofobne in oleofobne lastnosti tudi polisiloksani. Tako kot obstajajo omejitve pri izdelavi PTFE-membran, so tudi pri polisiloksanih (silikonih). Polisiloksanskih membran žal ni mogoče izdelati po klasičnem postopku inverzije faz. Kot zelo grobi nadomestki za drage PTFE-membrane so se uveljavili tudi razni oleofobni in hiodrofobni premazi na osnovi mehanskih pen in emulzij. V obeh primerih mora biti v osnovno matrico vgrajen ustrezni hidrofobni in oleofobni material (na primer fluorkarbon). Odprtost strukture in velikost por pri tovrstnih materialih še zdaleč ni primerljiva s PTFE-membranami. V tem članku je opisan nov postopek izdelave asimetričnih polisiloksanskih membran, ki je osnova za rešitev nastalega problema. Na podlagi takšnega postopka bi bilo morda možno izdelati tudi zelo fine asimetrične polisiloksanske membrane, ki bi imele veliko primerjalno prednost pred vsemi drugimi polimernimi materiali.Source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 44, št. 2, mar.-apr. 2010, str. 51-57)Type of material - article, component partPublish date - 2010Language - slovenianCOBISS.SI-ID - 4903009
Author
Drev, Darko |
Panjan, Jože
Topics
politetrafluoroetilen |
membrane |
hidrofobnost |
filtracija
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source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 44, št. 2, mar.-apr. 2010, str. 51-57)
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Database name | Field | Year |
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Drev, Darko | 11495 |
Panjan, Jože | 09399 |
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