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Enhanced antifouling and antibacterial performances of novel UV-curable polysiloxane/microcapsules/Ag composite coatings for marine applications

  • 0Shaanxi Key Laboratory of Catalysis, School of Chemical and Environmental Sciences, Shaanxi University of Technology, Hanzhong, Shaanxi 723001, People's Republic of China.
Royal Society Open Science +

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August 5, 2024

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August 5, 2024

View abstract on PubMed

Summary

This summary is machine-generated.

Novel marine coatings incorporating 4,5-dichloro-2-octyl-isothiazolone@sodium alginate/chitosan microcapsules (DCOIT@ALG/CS) and silver nanoparticles (AgNPs) demonstrate superior antifouling and antibacterial performance for marine applications.

Area Of Science

  • Materials Science
  • Marine Biology
  • Nanotechnology

Background

  • Marine biological fouling causes significant economic losses for ships and naval vessels.
  • Effective antifouling and antibacterial solutions are crucial for marine infrastructure and transportation.

Purpose Of The Study

  • To develop novel composite coatings with enhanced antifouling and antibacterial properties.
  • To investigate the efficacy of microcapsules and silver nanoparticles in preventing marine biofouling.

Main Methods

  • Preparation of 4,5-dichloro-2-octyl-isothiazolone@sodium alginate/chitosan microcapsules (DCOIT@ALG/CS).
  • Incorporation of microcapsules and silver nanoparticles (AgNPs) into UV-curable polysiloxane (UV-PDMS).
  • Fabrication of UV-PDMS/microcapsules/AgNPs (UV-PDMS/MCs/Ag) composite coatings via UV irradiation.

Main Results

  • The UV-PDMS/MCs/Ag coatings exhibited a high static contact angle (160°), indicating superhydrophobicity.
  • Coatings showed excellent mechanical properties, including shear strength (2.24 MPa) and tensile strength (3.32 MPa).
  • Synergistic antibacterial effects of DCOIT and AgNPs achieved 100% bacterial inhibition against E. coli and S. aureus within 10 minutes.

Conclusions

  • The developed micro-nano dual-scale surface coatings offer promising antifouling and antibacterial capabilities.
  • These composite coatings are suitable for marine transportation, pipeline networks, and undersea facilities.
  • The combination of microcapsules and AgNPs provides a synergistic effect for enhanced performance.

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