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

약한 광중합과 열경화를 이용한 곡면 미세 표면주름 제작

  • 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)
  • 양정호 (부산대학교 기계공학부) ;
  • 조지준 (부산대학교 기계공학부) ;
  • 박상후 (부산대학교 기계공학부 / 정밀정형 및 금형가공연구센터)
  • Received : 2016.01.17
  • Accepted : 2016.06.27
  • Published : 2016.10.01

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

References

  1. Persson, B., "Wet Adhesion with Application to Tree Frog Adhesive Toe Pads and Tires," Journal of Physics: Condensed Matter, Vol. 19, No. 37, Article No. 376110, 2007.
  2. Lafuma, A. and Quere, D., "Superhydrophobic States," Nature Materials, Vol. 2, No. 7, pp. 457-460, 2003. https://doi.org/10.1038/nmat924
  3. Whitesides, G.-M., "The Origins and the Future of Microfluidics," Nature, Vol. 442, No. 7101, pp. 368-373, 2006. https://doi.org/10.1038/nature05058
  4. Ohzono, T., Monobe, H., Shiokawa, K., Fujiwara, M., and Shimizu, Y., "Shaping Liquid on a Micrometre Scale Using Microwrinkles as Deformable Open Channel Capillaries," Soft Matter, Vol. 5, No. 23, pp. 4658-4664, 2009. https://doi.org/10.1039/b912235d
  5. Rand, C. J. and Crosby, A. J., "Friction of Soft Elastomeric Wrinkled Surfaces," Journal of Applied Physics, Vol. 106, Article No. 064913, 2009.
  6. Ibn-Eihaj, M. and Schadt, M., "Optical Polymer Thin Films with Isotropic and Anisotropic Nano-Corrugated Surface Topologies," Nature, Vol. 410, No. 6830, pp. 796-799, 2001. https://doi.org/10.1038/35071039
  7. Tian, C., Ji, H.-P., Zong, C.-Y., and Lu, C.-H., "Controlled Fabrication of Hierarchically Microstructured Surfaces Via Surface Wrinkling Combined with Template Replication," Chinese Chemical Letters, Vol. 26, No.1, pp. 15-20, 2015. https://doi.org/10.1016/j.cclet.2014.10.003
  8. He, L., Tang, C., Xu, X., Jiang, P., Lau, W.-M., et al., "Hyperthermal Hydrogen Induced Cross-Linking and Fabrication of Nano-Wrinkle Patterns in Ultrathin Polymer Films," Surface and Coatings Technology, Vol. 261, pp. 311-317, 2015. https://doi.org/10.1016/j.surfcoat.2014.11.013
  9. Kim, S. J., Park, H. J., Lee, J. C., Park, S., Ireland, P., et al., "A Simple Method to Generate Hierarchical Nanoscale Structures on Microwrinkles for Hydrophobic Applications," Materials Letters, Vol. 105, pp. 50-53, 2013. https://doi.org/10.1016/j.matlet.2013.04.043
  10. Park, S.-H., Park, H.-J., Kim, S.-J., and Ireland, P., "Generation of Periodic Surface Wrinkles Using a Single Layer Resin by a Repetitive Dividing Volume (RDV) Technique," Microelectronic Engineering, Vol. 106, pp. 13-20, 2013. https://doi.org/10.1016/j.mee.2013.01.047
  11. Zhao, Z.-J., Li, X., and Park, S.-H., "Generation of Various Wrinkle Shapes on Single Surface by Controlling Thickness of Weakly Polymerized Layer," Materials Letters, Vol. 155, pp.125-129, 2015. https://doi.org/10.1016/j.matlet.2015.04.093
  12. Greco, F., Bellacicca, A., Gemmi, M., Cappello, V., Mattoli, V., et al., "Conducting Shrinkable Nanocomposite Based on Au-Nanoparticle Implanted Plastic Sheet: Tunable Thermally Induced Surface Wrinkling," Applied Materials Interfaces, Vol. 7, No. 13, pp. 7060-7065, 2015. https://doi.org/10.1021/acsami.5b00825
  13. Schweikart, A., Horn, A., Boker, A., and Fery, A., "Controlled Wrinkling as a Novel Method for the Fabrication of Patterned Surfaces," in Complex Macromolecular Systems I, Muller, A. H. E. and Schmidt, H.-W., (Eds.), Springer Berlin Heidelberg, pp. 75-99, 2009.
  14. Yang, S., Khare, K., and Lin, P. C., "Harnessing Surface Wrinkle Patterns in Soft Matter," Advanced Functional Materials, Vol. 20, No. 16, pp. 2550-2564, 2010. https://doi.org/10.1002/adfm.201000034
  15. Li, Y., Dai, S., John, J., and Carter, K. R., "Superhydrophobic Surfaces from Hierarchically Structured Wrinkled Polymers," ACS Applied Materials Interfaces, Vol. 5, No. 21, pp. 11066-11073, 2013. https://doi.org/10.1021/am403209r
  16. Rodriguez-Hernandez, J., "Wrinkled Interfaces: Taking Advantage of Surface Instabilities," Progress in Polymer Science, Vol. 42, pp. 1-41, 2015. https://doi.org/10.1016/j.progpolymsci.2014.07.008
  17. Kim, S. C., Kim, D. H., and Lee, G. Y., "Polymer Engineering I," Heejoongdang, pp. 10-19, 1994.