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Citation: ZHANG Weigang, XU Guoyue, XUE Lianhai, CHEN Yaxi. Influence of 3-Aminopropyltriethoxysilane on Natural Aging Property of Polyurethane/Al-Sm2O3 Composite Coatings[J]. Chinese Journal of Applied Chemistry, ;2017, 34(4): 430-435. doi: 10.11944/j.issn.1000-0518.2017.04.160260 shu

Influence of 3-Aminopropyltriethoxysilane on Natural Aging Property of Polyurethane/Al-Sm2O3 Composite Coatings

  • a.

    College of Materials and Chemical Engineering, Chuzhou University, Chuzhou, Anhui 239000, China

  • b.

    College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

  • Corresponding author: ZHANG Weigang, abczwg15@163.com
  • Received Date: 21 June 2016
    Revised Date: 16 August 2016
    Accepted Date: 5 September 2016

    Fund Project: Research Projects of Chuzhou University No.2015PY02University Natural Science Research Key Project of Anhui Province No.KJ2016A535Supported by the National Natural Science Foundation of China No.40772033Scientific Research Start Foundation Project of Chuzhou University No.2015qd15

Figures(2)

  • Polyurethane (PU)/Al-Sm2O3 composite coatings were modified by silane coupling agent 3-aminopropyltriethoxysilane (KH550). The variation of natural aging property before and after modification was systematically investigated from the perspectives of functional properties and mechanical properties. The results indicate that the stability of infrared emissivity of PU/Al-Sm2O3 composite coatings for natural aging is significantly enhanced after KH550 modification. The infrared emission of modified coatings is significantly lower than that of unmodified coatings under the same conditions. The dispersion of Sm2O3 particles on the coatings' surface is more uniform after modified by KH550. The near-infrared light absorption intensity has increased, and this leads to a 1.06 μm near-infrared reflectivity of modified coatings, which is significantly lower than that of unmodified coatings. The coatings' hardness has good stability for natural aging before and after modification. The hardness can maintain for 3 H. The adhesion strength and impact strength of the unmodified coatings are significantly affected by natural aging, but it can be significantly strengthened after KH550 modification to maintained at 1 grade and 50 kg·cm after natural aging for 4 months, respectively.
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