<P><B>Abstract</B></P> <P>Recently, various nanotechnologies have been utilized with regard to membrane modification due to their high activities and the low cost of the nanomaterials involved. In order to enhance the hy...
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
https://www.riss.kr/link?id=A107502307
2016
-
SCI,SCIE,SCOPUS
학술저널
178-184(7쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P><B>Abstract</B></P> <P>Recently, various nanotechnologies have been utilized with regard to membrane modification due to their high activities and the low cost of the nanomaterials involved. In order to enhance the hy...
<P><B>Abstract</B></P> <P>Recently, various nanotechnologies have been utilized with regard to membrane modification due to their high activities and the low cost of the nanomaterials involved. In order to enhance the hydrophobicity of the membrane surface for membrane distillation applications by decreasing the surface energy, a radio-frequency plasma-enhanced chemical vapor deposition (RF-PECVD) process is suggested with surface nanostructuring and a subsequent hydrophobic coating step. In this research, a commercial PVDF membrane was modified by plasma treatments with the two different gases of O<SUB>2</SUB> and CF<SUB>4</SUB>. The water contact angles of the active layers increased from 73 to 117 and 101° and the fluxes of the treated membranes increased to 63 and 27.9% as compared to a virgin PVDF membrane when the feed used was D.I. water by the O<SUB>2</SUB> and CF<SUB>4</SUB> plasma modifications, respectively. Defluorination at the long exposure time (120min) of the plasma treatment and increase of the overall hydrophobicity (the decrease of the contact angle hysteresis) by the HMDSO coating were the reasons of the flux variations for the plasma modified membranes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The PVDF membranes were modified by plasma treatments with O<SUB>2</SUB> and CF<SUB>4</SUB> gases. </LI> <LI> The modified membrane have an enhanced flux and hydrophobicity after the plasma treatment. </LI> <LI> The pore-size and porosity at the membrane surface increased after the plasma treatment. </LI> <LI> The hairy structure was formed at the membrane surface by the HMDSO coating. </LI> <LI> The O<SUB>2</SUB> plasma treatment with HMDSO coating increased the receding contact angle. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>