Hydrophobic polydimethylsiloxane thin films prepared by chemical vapor deposition: Application in water purificationHydrophobic Polydimethylsiloxane Thin Films Prepared by Chemical Vapor Deposition: Application in Water Purification
- Other Titles
- Hydrophobic Polydimethylsiloxane Thin Films Prepared by Chemical Vapor Deposition: Application in Water Purification
- Authors
- Han, S.W.[Han, S.W.]; Kim, K.-D.[ Kim, K.-D.]; Kim, J.H.[ Kim, J.H.]; Uhm, S.[ Uhm, S.]; Kim, Y.D.[Kim, Y.D.]
- Issue Date
- 2017
- Publisher
- Korean Society of Industrial Engineering Chemistry
- Keywords
- Hydrophilicity; Hydrophobicity; PDMS; Water purification
- Citation
- Applied Chemistry for Engineering, v.28, no.1, pp.1 - 7
- Indexed
- SCOPUS
KCI
- Journal Title
- Applied Chemistry for Engineering
- Volume
- 28
- Number
- 1
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/skku/handle/2021.sw.skku/33235
- DOI
- 10.14478/ace.2016.1129
- ISSN
- 1225-0112
- Abstract
- Polydimethylsiloxane (PDMS) can be deposited on various substrates using chemical vapor deposition process, which results in the formation of PDMS thin films with thickness below 5 nm. PDMS layers can be evenly deposited on surfaces of nanoparticles composed of various chemical compositions such as SiO2, TiO2, ZnO, C, Ni, and NiO, and the PDMS-coated surface becomes completely hydrophobic. These hydrophobic layers are highly resistant towards degradation under acidic and basic environments and UV-exposures. Nanoparticles coated with PDMS can be used in various environmental applications: hydrophobic silica nanoparticles can selectively interact with oil from oil/water mixture, suppressing fast diffusion of spill-oil on water and allowing more facile physical separation of spill-oil from the water. Upon heat-treatments of PDMS-coated TiO2 under vacuum conditions, TiO2 surface becomes completely hydrophilic, accompanying formation oxygen vacancies responsible for visible-light absorption. The post-annealed PDMS-TiO2 shows enhanced photocatalytic activity with respect to the bare TiO2 for decomposition of organic dyes in water under visible light illumination. We show that the simple PDMS-coating process presented here can be useful in a variety of field of environmental science and technology. © 2017 The Korean Society of Industrial and Engineering Chemistry. All rights reserved.
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