Wettability modification of cyclic olefin copolymer surface and microchannel using micromilling process. (January 2019)

• Record Type: Journal Article
• Authors: Gang, Myeong Gu; Chae, Ki Woon; Kim, Wook-Bae; Jung, Young Hun; Jun, Martin B.G.; Min, Byung-Kwon
• Is Part Of: Journal of manufacturing processes. Volume 37(2019)
• Page Start: 168
• Page End: 176
• Publication Date: 2019-01
• Subjects: Micromachining -- Surface roughness -- Contact angle -- Polymer machining; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2018.10.037
• Languages: English
• ISSNs: 1526-6125

Abstract

Abstract: Microchannels must have appropriate physical (e.g., shape, size and surface roughness) and chemical (e.g., functional groups and wettability) properties to be used in microfluidic devices. In general, microchannels, which are made of polymeric materials, are produced through a molding process and chemically treated to have proper wettability. However, mold fabrication and chemical treatment require a significant amount of time and cost. In this study, we used a micromilling process to fabricate a microchannel on polymer material. The contact angle on the machined surface was changed according to the wettability model by varying the surface roughness controlled by cutting parameters. By mechanical cutting of the naturally hydrophobic polymer, the contact angle could be physically changed from 76° to 109° by changing cutting parameters without any chemical change.