Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Precursor Ratio on the Properties of Inorganic-Organic Hybrid TiO2-SiO2 Coating

유무기 TiO2-SiO2 혼성코팅에 미치는 전구체 배합비율의 영향

  • Kim, Dong Kyu (Department of Engineering Chemistry, College of Engineering, Chungbuk National University) ;
  • Maeng, Wan Young (Department of Nuclear Material, Korea Atomic Energy Research)
  • 김동규 (충북대학교 공과대학 공업화학과) ;
  • 맹완영 (한국원자력연구원 원자력소재개발부)
  • Received : 2015.12.28
  • Accepted : 2016.04.12
  • Published : 2016.05.27
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Abstract

When a single inorganic precursor is used for the synthesis of a sol-gel coating, there is a problem of cracking on the surface of coating layer. In order to solve this problem of surface cracking, we synthesized inorganic-organic coatings that have hybrid properties of inorganic and organic materials. Sols of various ratios (1:0.07, 0.2, 0.41, 0.82, 1.64, 3.26, 6.54, 13.2) of an inorganic precursor of Tetrabutylorthotitanate ($Ti(OBu)_4$, TBOT) and an organic precursor of ${\gamma}$-Methacryloxy propyltrimethoxysilane (MAPTS) were prepared and coated on stainless steels (SUS316L) by dip coating method. The binding structure and the physical properties of the synthesized coatings were analyzed by FT-IR, FE-SEM, FIB (Focused Ion Beam), and a nano-indenter. Dynamic polarization testing and EIS (electrical impedance spectroscopy) were carried out to evaluate the micro-defects and the corrosion properties of the coatings. The prepared coatings show hybrid properties of inorganic oxides and organic materials. Crack free coatings were prepared when the MAPTS ratio was above a critical value. As the MAPTS ratio increased, the thickness and the corrosion resistance increased, and the hardness decreased.

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References

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