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<p>This paper breaks through the traditional hydrophobic design concept of antifouling coatings by combining aggregated state structure, interface structure, and coating micro-nano surface structure to prepare an organic-inorganic hybrid epoxy resin with a mesogenic structure, addressing the defects of poor coating toughness and insufficient antifouling performance in complex marine environments. Firstly, a liquid crystalline epoxy curing agent and Ag@SiO<sub>2</sub> antifouling particles with both reactivity and hydrophobicity were designed and prepared. By blending the self-made curing agent, modified nano-Ag, and E-44, an organic-inorganic hybrid epoxy resin integrating microbial attachment inhibition, hydrophobicity, liquid crystallinity, and micro-nano surface structure was successfully prepared. Results showed that the adhesion of the composite coatings reached grade B or above, and the hardness reached grade H or above. Due to the increase in the number of flexible C atoms in the side chain of the curing agent molecule, ordered liquid crystal microdomains are induced during the curing process. The synergistic effect of the rigid liquid crystal mesogenic units and the flexible side chains effectively promotes stress dispersion and increases the mobility of molecular segments, thereby increasing the elongation at break from 0.51% to 5.3%, achieving a transition from brittle fracture to ductile fracture. The composite coating (TC-20) surface possessed a complex micro-nano rough structure, with a contact angle of 127° and a surface energy of 8.9 mJ/m<sup>2</sup>, exhibiting significant self-cleaning performance. After continuous abrasion and acid-base corrosion, the surface structure of the composite coating remained intact, demonstrating persistent hydrophobic and barrier properties. When the addition amount of SG-1 was only 1.5%, the antibacterial rates of the composite coating against <i>E. coli</i> and <i>S. aureus</i> reached 99% and 99.4%, respectively; when the addition amount of SG-1 was 2%, the anti-protein adsorption efficiency reached 82.5%, indicating high-efficiency antifouling performance.</p>

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Preparation and antifouling properties of Organic-Inorganic hybrid epoxy resin

  • 期刊论文

  • 发表日期：

    2026年1月27日

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  • Haiyan Wang,
  • Jiahua Qiu,
  • Xiwen Wang,
  • Jin Yang

摘要

This paper breaks through the traditional hydrophobic design concept of antifouling coatings by combining aggregated state structure, interface structure, and coating micro-nano surface structure to prepare an organic-inorganic hybrid epoxy resin with a mesogenic structure, addressing the defects of poor coating toughness and insufficient antifouling performance in complex marine environments. Firstly, a liquid crystalline epoxy curing agent and Ag@SiO2 antifouling particles with both reactivity and hydrophobicity were designed and prepared. By blending the self-made curing agent, modified nano-Ag, and E-44, an organic-inorganic hybrid epoxy resin integrating microbial attachment inhibition, hydrophobicity, liquid crystallinity, and micro-nano surface structure was successfully prepared. Results showed that the adhesion of the composite coatings reached grade B or above, and the hardness reached grade H or above. Due to the increase in the number of flexible C atoms in the side chain of the curing agent molecule, ordered liquid crystal microdomains are induced during the curing process. The synergistic effect of the rigid liquid crystal mesogenic units and the flexible side chains effectively promotes stress dispersion and increases the mobility of molecular segments, thereby increasing the elongation at break from 0.51% to 5.3%, achieving a transition from brittle fracture to ductile fracture. The composite coating (TC-20) surface possessed a complex micro-nano rough structure, with a contact angle of 127° and a surface energy of 8.9 mJ/m2, exhibiting significant self-cleaning performance. After continuous abrasion and acid-base corrosion, the surface structure of the composite coating remained intact, demonstrating persistent hydrophobic and barrier properties. When the addition amount of SG-1 was only 1.5%, the antibacterial rates of the composite coating against E. coli and S. aureus reached 99% and 99.4%, respectively; when the addition amount of SG-1 was 2%, the anti-protein adsorption efficiency reached 82.5%, indicating high-efficiency antifouling performance.