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<p>The waterborne polyurethane (WPU) has been applied in many fields due to environmental friendliness; however, most of the single-component WPU still has the problems of poor water resistance and low stability. Thus, this work developed an interpenetrating network (IPN) waterborne polyurethane/polyacrylate composite emulsion (WPUA) and then used organofluorine as hydrophobic modifier. The stability, morphology, and film-forming performances of as-prepared organofluorine modified WPUA (FWPUA) were investigated. These results showed that the storage stability of as-prepared FWPUA exceeded 6&#xa0;months and the water contact angle of FWPUA film reached 93.38° and the water absorption rate reduced to 9% exhibiting good hydrophobic performance. The surface of FWPUA film was rougher and the degree of “wrinkling” in the cross-section was significantly deeper with the increasing of the organofluorine content. In addition, the tensile strength of optimized FWPUA film was 8.83&#xa0;MPa and the average light transmittance in the range of 390-780&#xa0;nm was 92%. Therefore, as-prepared FWPUA in this work can replace WPUA and has potential in hydrophobic coating and film.</p>

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Synthesis of Waterborne Polyurethane/Polyacrylate Composite Emulsion Modified with Organofluorine and its Film Forming Performances

  • 期刊论文

  • 发表日期：

    2026年1月3日

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  • Youliang Cheng,
  • Zefeng Xu,
  • Changqing Fang,
  • Meng Guo,
  • Fang Yang,
  • Jing Chen,
  • Yifan Deng,
  • Wenke Qiu

摘要

The waterborne polyurethane (WPU) has been applied in many fields due to environmental friendliness; however, most of the single-component WPU still has the problems of poor water resistance and low stability. Thus, this work developed an interpenetrating network (IPN) waterborne polyurethane/polyacrylate composite emulsion (WPUA) and then used organofluorine as hydrophobic modifier. The stability, morphology, and film-forming performances of as-prepared organofluorine modified WPUA (FWPUA) were investigated. These results showed that the storage stability of as-prepared FWPUA exceeded 6 months and the water contact angle of FWPUA film reached 93.38° and the water absorption rate reduced to 9% exhibiting good hydrophobic performance. The surface of FWPUA film was rougher and the degree of “wrinkling” in the cross-section was significantly deeper with the increasing of the organofluorine content. In addition, the tensile strength of optimized FWPUA film was 8.83 MPa and the average light transmittance in the range of 390-780 nm was 92%. Therefore, as-prepared FWPUA in this work can replace WPUA and has potential in hydrophobic coating and film.