Superhydrophobic fluoropolymer-modified copper surface via surface graft polymerisation for corrosion protection |
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Authors: | Shaojun Yuan SO Pehkonen Bin Liang YP Ting KG Neoh ET Kang |
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Affiliation: | aCollege of Chemical Engineering, Sichuan University, Chengdu 610065, China;bChemical Engineering Program, Masdar Institute of Science and Technology, PO Box 54224, Abu Dhabi, United Arab Emirates;cDepartment of Chemical and Biomolecular Engineering, National University of Singapore, Kent Ridge, Singapore 119260, Singapore |
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Abstract: | With the objective of developing materials with repellent surfaces by combining both low surface energy and rough structure, superhydrophobic fluoropolymer films were prepared via surface graft polymerisation from copper substrates. A vinyl-terminated trimethoxysilane was firstly immobilised on the etched-copper surface to introduce active carbon–carbon double bonds. Subsequent graft polymerisation of 2,2,3,4,4,4-hexafluorobutyl acrylate (HFBA), in the presence of a polymerisation initiator 4,4′-azobis-(4-cyanpentanoic acid), yielded the fluoropolymer films on the copper substrates. The resultant P(HFBA)-grafted surfaces not only exhibited desired superhydrophobic property with water contact angle above 150°, but substantially improved the corrosion resistance of copper substrates. |
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Keywords: | A Copper A Polymer B XPS C Polymer Coatings C Superhydrophobicity |
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