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http://dx.doi.org/10.7736/KSPE.2016.33.10.875

Fabrication of Microscale Wrinkles on a Curved Surface Using Weak-Polymerization and Thermal Curing Process  

Yang, Jung Ho (Graduate School, School of Mechanical Engineering, Pusan National University)
Zhao, Zhi Jun (Graduate School, School of Mechanical Engineering, Pusan National University)
Park, Sang Hu (School of Mechanical Engineering, ERC/NSDM, Pusan National University)
Publication Information
Journal of the Korean Society for Precision Engineering / v.33, no.10, 2016 , pp. 875-880 More about this Journal
Abstract
In this study, we proposed an effective and simple way to directly generate wrinkle patterns on a curved surface. A curved surface was prepared using a 3D printer and an UV (Ultraviolet)-lighting system was utilized to weakly polymerize the UV-curable thin resin layer coated on the surface, resulting in a gradient of material properties in the layer thickness. Subsequently, a thermal curing process was conducted to generate microscale wrinkles by compressive forces that were generated during complete curing. Wrinkle shapes from 5, 15, 25 sec of UV-light exposure were compared. With increasing UV-exposure, the line-width of wrinkles became thicker due to much higher strength of skin zone. The results indicated that the proposed fabrication process could be utilized for surface modification in diverse research fields.
Keywords
UV curing resin; Weakly polymerization; Thermal curing; Microscale wrinkle; Curved surface;
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