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Hydrophobic Waterborne Epoxy Coating Modified by Low Concentrations of Fluorinated Reactive Modifier

  • Hongyi Shi
  • Weiqu LiuEmail author
  • Maiping Yang
  • Xinsheng Liu
  • Yankun Xie
  • Zhengfang Wang
Article
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Abstract

Fluorinated (meth) acrylate oligomer modified epoxy resin (PHFBMA-DGEBA) and polyether-modified epoxy resin (MPEG-DGEBA) were successfully synthesized and used as reactive modifier and emulsifier for epoxy resins, respectively. GPC, FTIR and 1H NMR were employed to verify the synthesis. The influence of both the concentration and the molecular weight of PHFBMA-DGEBA on the properties of waterborne epoxy resin coatings was investigated. Surface energy and surface composition were probed by contact angle measurements and X-ray photoelectron spectroscopy (XPS), which strongly confirmed the enrichment of fluorinate atoms on the surface. The surface energy of waterborne epoxy coating was decreased from 44.46 mN/m to 23.20 mN/m by adding just 0.09 wt% PHFBMADGEBA-2, indicating its high effectiveness in improving the surface hydrophobicity. Moreover, the physical properties of waterborne epoxy coatings prepared with different concentration and molecular weight of fluorinated reactive modifier, such as water absorption, Shore D hardness, adhesion, thermal properties and optical transmittance, were also analyzed in detail. Taken together, the waterborne epoxy coatings prepared with low concentrations of reactive modifier are economical and have great potential in large scale industry applications.

Keywords

reactive modifier emulsifier waterborne epoxy resin hydrophobicity low concentrations 

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Copyright information

© The Polymer Society of Korea and Springer 2019

Authors and Affiliations

  • Hongyi Shi
    • 1
    • 2
    • 3
  • Weiqu Liu
    • 1
    • 2
    Email author
  • Maiping Yang
    • 1
    • 2
    • 3
  • Xinsheng Liu
    • 1
    • 2
    • 3
  • Yankun Xie
    • 1
    • 2
    • 3
  • Zhengfang Wang
    • 1
    • 2
  1. 1.Guangzhou Institute of ChemistryChinese Academy of SciencesGuangzhouP. R. China
  2. 2.Key Laboratory of Cellulose and Lignocellulosics ChemistryChinese Academy of SciencesGuangzhouP. R. China
  3. 3.University of Chinese Academy of SciencesBeijingP. R. China

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