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http://dx.doi.org/10.17702/jai.2019.20.1.1

Fabrication of Poly(methyl methacrylate) Beads Monolayer Using Rod-coater and Effects of Solvents, Surfactants and Plasma Treatment on Monolayer Structure  

Kim, Da Hye (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Ham, Dong Seok (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Lee, Jae-Heung (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Huh, Kang Moo (Department of Polymer Science and Engineering, Chungnam National University)
Cho, Seong-Keun (Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology)
Publication Information
Journal of Adhesion and Interface / v.20, no.1, 2019 , pp. 1-8 More about this Journal
Abstract
Fabrication of monolayer is important method for enhancing physical and chemical characteristics such as light shielding and antireflection while maintaining thin film properties. In previous studies, monolayers were fabricated by various methods on small substrates, but processes were complicated and difficult to form monolayers with large area. We used rod coating equipment with a small amount of coating liquid to form a HCP (hexagonal closed packing) coating of PMMA beads on PET(poly(ethylene terephthalate)) substrate with $20cm{\times}20cm$ size. We observed that changes in morphologies of monolayers by using the solvents with different boiling points and vapor pressures, by adapting surfactants on particles and by applying plasma treatment on substrates. The coverage was increased by 20% by optimizing the coating conditions including meniscus of beads, control of the attraction - repulsion forces and surface energy. This result can potentially be applied to optical films and sensors because it is possible to make a uniform and large-scale monolayer in a simple and rapid manner when it is compared to the methods in previous studies.
Keywords
Monolayer; Coverage; Beads; Rod coating; HCP;
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