Improving the Hydrophobicity of ZnO by PTFE Incorporation
The objective of the present study is to obtain a zinc oxide- (ZnO-) based superhydrophobic surface in a simple and cost-effective manner. Chemical immersion deposition being simple and economical has been adopted to develop modified ZnO coating on glass substrate. Several modifications of ZnO like...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/2011/392754 |
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| author | Meenu Srivastava Bharathi Bai J. Basu K. S. Rajam |
| author_facet | Meenu Srivastava Bharathi Bai J. Basu K. S. Rajam |
| author_sort | Meenu Srivastava |
| collection | DOAJ |
| description | The objective of the present study is to obtain a zinc oxide- (ZnO-) based superhydrophobic surface in a simple and cost-effective manner. Chemical immersion deposition being simple and economical has been adopted to develop modified ZnO coating on glass substrate. Several modifications of ZnO like treatment with alkanoic acid (stearic acid) and fluoroalkylsilane to tune the surface wettability (hydrophobicity) were attempted. The effect of thermal treatment on the hydrophobic performance was also studied. It was observed that thermal treatment at 70°C for 16 hrs followed by immersion in stearic acid resulted in high water contact angle (WCA), that is, a superhydrophobic surface. Thus, a modified ZnO superhydrophobic surface involves the consumption of large amount of electrical energy and time. Hence, the alternate involved the incorporation of low surface energy fluoropolymer polytetrafluoroethylene (PTFE) in the ZnO coating. The immersion deposited ZnO-PTFE composite coating on modification with either stearic acid or fluoroalkylsilane resulted in a better superhydrophobic surface. The coatings were characterized using Scanning Electron Microscope (SEM) for the surface morphology. It was found that microstructure of the coating was influenced by the additives employed. A flower-like morphology comprising of needle-like structure arranged in a radial manner was exhibited by the superhydrophobic coating. |
| format | Article |
| id | doaj-art-ff78526b45534cefb241266385cc2097 |
| institution | Kabale University |
| issn | 1687-9503 1687-9511 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nanotechnology |
| spelling | doaj-art-ff78526b45534cefb241266385cc20972025-02-03T01:06:59ZengWileyJournal of Nanotechnology1687-95031687-95112011-01-01201110.1155/2011/392754392754Improving the Hydrophobicity of ZnO by PTFE IncorporationMeenu Srivastava0Bharathi Bai J. Basu1K. S. Rajam2Council of Scientific and Industrial Research, Surface Engineering Division, National Aerospace Laboratories, Bangalore 560 017, IndiaCouncil of Scientific and Industrial Research, Surface Engineering Division, National Aerospace Laboratories, Bangalore 560 017, IndiaCouncil of Scientific and Industrial Research, Surface Engineering Division, National Aerospace Laboratories, Bangalore 560 017, IndiaThe objective of the present study is to obtain a zinc oxide- (ZnO-) based superhydrophobic surface in a simple and cost-effective manner. Chemical immersion deposition being simple and economical has been adopted to develop modified ZnO coating on glass substrate. Several modifications of ZnO like treatment with alkanoic acid (stearic acid) and fluoroalkylsilane to tune the surface wettability (hydrophobicity) were attempted. The effect of thermal treatment on the hydrophobic performance was also studied. It was observed that thermal treatment at 70°C for 16 hrs followed by immersion in stearic acid resulted in high water contact angle (WCA), that is, a superhydrophobic surface. Thus, a modified ZnO superhydrophobic surface involves the consumption of large amount of electrical energy and time. Hence, the alternate involved the incorporation of low surface energy fluoropolymer polytetrafluoroethylene (PTFE) in the ZnO coating. The immersion deposited ZnO-PTFE composite coating on modification with either stearic acid or fluoroalkylsilane resulted in a better superhydrophobic surface. The coatings were characterized using Scanning Electron Microscope (SEM) for the surface morphology. It was found that microstructure of the coating was influenced by the additives employed. A flower-like morphology comprising of needle-like structure arranged in a radial manner was exhibited by the superhydrophobic coating.http://dx.doi.org/10.1155/2011/392754 |
| spellingShingle | Meenu Srivastava Bharathi Bai J. Basu K. S. Rajam Improving the Hydrophobicity of ZnO by PTFE Incorporation Journal of Nanotechnology |
| title | Improving the Hydrophobicity of ZnO by PTFE Incorporation |
| title_full | Improving the Hydrophobicity of ZnO by PTFE Incorporation |
| title_fullStr | Improving the Hydrophobicity of ZnO by PTFE Incorporation |
| title_full_unstemmed | Improving the Hydrophobicity of ZnO by PTFE Incorporation |
| title_short | Improving the Hydrophobicity of ZnO by PTFE Incorporation |
| title_sort | improving the hydrophobicity of zno by ptfe incorporation |
| url | http://dx.doi.org/10.1155/2011/392754 |
| work_keys_str_mv | AT meenusrivastava improvingthehydrophobicityofznobyptfeincorporation AT bharathibaijbasu improvingthehydrophobicityofznobyptfeincorporation AT ksrajam improvingthehydrophobicityofznobyptfeincorporation |