Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Preparation of Self-Cleaning Coating Films with Nano- and Microstructure

나노마이크로 구조의 자기세정 기능성 코팅막의 제조

  • Jeong, A-Rong (Department of Advanced Engineering, Graduate School, Kyungnam University) ;
  • Kim, Jun-Su (Department of Advanced Engineering, Graduate School, Kyungnam University) ;
  • Yun, Jon-Do (Department of Nano Materials Engineering, Kyungnam University)
  • 정아롱 (경남대학교 대학원 첨단공학과) ;
  • 김준수 (경남대학교 대학원 첨단공학과) ;
  • 윤존도 (경남대학교 나노신소재공학과)
  • Received : 2012.07.18
  • Accepted : 2012.07.28
  • Published : 2012.08.27
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Abstract

Recently nanoscience and nanotechnology have been studied intensively, and many plants, insects, and animals in nature have been found to have nanostructures in their bodies. Among them, lotus leaves have a unique nanostructure and microstructure in combination and show superhydrophobicity and a self-cleaning function to wipe and clean impurities on their surfaces. Coating films with combined nanostructures and microstructures resembling those of lotus leaves may also have superhydrophobicity and self-cleaning functions; as a result, they could be used in various applications, such as in outfits, tents, building walls, or exterior surfaces of transportation vehicles like cars, ships, or airplanes. In this study, coating films were prepared by dip coating method using polypropylene polymers dissolved in a mixture of solvent, xylene and non-solvent, methylethylketon, and ethanol. Additionally, attempts were made to prepare nanostructures on top of microstructures by coating with the same coating solution with an addition of carbon nanotubes, or by applying a carbon nanotube over-coat on polymer coating films. Coating films prepared without carbon nanotubes were found to have superhydrophobicity, with a water contact angle of $152^{\circ}$ and sliding angle less than $2^{\circ}$. Coating films prepared with carbon nanotubes were also found to have a similar degree of superhydrophobicity, with a water contact angle of 150 degrees and a sliding angle of 3 degrees.

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References

  1. W. R. Hansen and K. Autumn, Proc. Natl. Acad. Sci. USA, 102(2), 385 (2005). https://doi.org/10.1073/pnas.0408304102
  2. H. S. Lee, KISTI Market Reports, 2(4), 20 (2012) (in Korean).
  3. W. Barthlott and C. Neinhuis, Planta, 202(1), 1 (1997). https://doi.org/10.1007/s004250050096
  4. M. Ma and R. M. Hill, Curr. Opin. Colloid Interface Sci., 11, 193 (2006). https://doi.org/10.1016/j.cocis.2006.06.002
  5. W. A. Zisman, Contact Angle, Wettability, and Adhesion (in Advances in Chemistry), Vol. 43, p. 1-51, American Chemical Society, Wasington, USA (1964). DOI: 10.1021/ba-1964-0043.ch001.
  6. H. Y. Erbil, A. L. Demirel, Y. Avci and O. Mert, Science, 299, 1377 (2003). https://doi.org/10.1126/science.1078365
  7. J. S. Jeong, K. B. Park and H. S. Choi, Clean Technology, 14(1), 35 (2008) (in Korean).
  8. C. -T. Hsieh, F. -L. Wu and W. -Y. Chen, Mater. Chem. Phys., 121, 14 (2010). https://doi.org/10.1016/j.matchemphys.2009.12.031
  9. H. Li, X. Wang, Y. Song, Y. Liu, Q. Li, L. Jiang and D. Zhu, Angew. Chem. Int. Ed., 40(9), 1743 (2001). https://doi.org/10.1002/1521-3773(20010504)40:9<1743::AID-ANIE17430>3.0.CO;2-#
  10. L. Y. L. Wu, A. M. Soutar and X. T. Zeng, Surf. Coating. Tech., 198, 420 (2005). https://doi.org/10.1016/j.surfcoat.2004.10.050
  11. Y. Wu, H. Sugimura, Y. Inoue and O. Takai, Chem. Vap. Deposition, 8(2), 47, (2002). https://doi.org/10.1002/1521-3862(20020304)8:2<47::AID-CVDE47>3.0.CO;2-#
  12. K. Teshima, H. Sugimura, Y. Inoue, O. Takai and A. Takano, Appl. Surf. Sci., 244, 619 (2005). https://doi.org/10.1016/j.apsusc.2004.10.143