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<p>Effective antifouling coatings are critical for protecting marine infrastructure from biofouling and environmental degradation; however, achieving long-term antifouling performance along with environmental stability remains a major challenge. In this study, a multifunctional bio-based epoxy coating is developed by integrating a dual-action antifouling system. Cinnamic acid (CA), which is known for its antibacterial and UV-shielding properties, was chemically grafted into ethylene glycol diglycidyl ether (EGDE) to provide intrinsic antifouling and anti-UV functions. Simultaneously, the KH560-modified silica aerogel was incorporated to create a dense hydrophobic surface that repels microorganism adhesion. The resulting coating exhibited a superhydrophobic contact angle of 154.3°, an ultralow surface energy, and exceptional resistance to protein and algal adhesion. Additionally, it achieves 99% bactericidal efficiency against <i>Escherichia coli</i> (<i>E. coli</i>) and <i>Staphylococcus aureus</i> (<i>S. aureus</i>) while maintaining high transparency and ease of processing. These results highlight a promising strategy for designing durable and ecofriendly antifouling coatings suitable for demanding marine environments.</p>

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Fabrication of Functional Biobased Epoxy Coatings via Cinnamic Acid Grafting: Synergistic Antibacterial, Antifouling, UV-resistant, and Superhydrophobic Properties

  • 期刊论文

  • 发表日期：

    2025年11月12日

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  • Ming-Xuan Chen,
  • Shu Tian,
  • Shuai-Peng Wang,
  • Sakil Mahmud,
  • Guang-Ming Lu,
  • Jin-Yue Dai,
  • Xiao-Qing Liu

摘要

Effective antifouling coatings are critical for protecting marine infrastructure from biofouling and environmental degradation; however, achieving long-term antifouling performance along with environmental stability remains a major challenge. In this study, a multifunctional bio-based epoxy coating is developed by integrating a dual-action antifouling system. Cinnamic acid (CA), which is known for its antibacterial and UV-shielding properties, was chemically grafted into ethylene glycol diglycidyl ether (EGDE) to provide intrinsic antifouling and anti-UV functions. Simultaneously, the KH560-modified silica aerogel was incorporated to create a dense hydrophobic surface that repels microorganism adhesion. The resulting coating exhibited a superhydrophobic contact angle of 154.3°, an ultralow surface energy, and exceptional resistance to protein and algal adhesion. Additionally, it achieves 99% bactericidal efficiency against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) while maintaining high transparency and ease of processing. These results highlight a promising strategy for designing durable and ecofriendly antifouling coatings suitable for demanding marine environments.