摘要
Surface-adhering biofilms contribute significantly to irreversible biofouling and corrosion,presenting a multi-trillion-dollar annual problem in public health and industry.Strategies employing antibacterial elements are emerging to fabricate multifunctional coatings that effectively combat such microbially produced damage.However,rapid,reliable,and robust surface engineering remains challenging due to stability limitations and intricate anti-biofilm additive dynamics.Herein,a silver-capsule-conjugated polyurethane coating with high stability and antimicrobial efficacy in a cooperative manner is developed through controlled supramolecular self-assembly.Polyvinylpyrrolidone(PVP)-mediated molecule entanglement breaks through the incompatibility between polymeric components and nanomaterials,strengthening the dispersion and fixation of encapsulated silver nanoparticles.The facilitation and control of the nanoscale interfacial binding significantly suppresses the aggregation of inorganic nanoparticles and consequent microcracks development,giving rise to mechanical robustness and thermal stability of the hybrid coating under extreme conditions.A synergistic combination of exposed residues,electrostatic,and coordination interactions could readily integrate the resultant coating on virtually arbitrary material sur-faces.This composite coating exhibits broad-spectrum and high bactericidal efficiencies of 99.99% against Staphylococcus aureus and Escherichia coli,as well as excellent biofilm formation suppression.Moreover,our coating has robust resistance to microbial-influenced corrosion(MIC)and can even endure 720 h of salt spray.This study deciphers a general code for creating stable and durable nanohybrid coatings to mitigate microbially related risks.
基金
supported by the National Key Research and Development Program of China(Grant No.2022YFB3808800,Dake Xu)
the National Natural Science Foundation of China(Grant Nos.U2006219(Dake Xu),52301081(Xiangyu Li))
the National Postdoctoral Program for Innovative Talents(Grant No.BX20220059,Xiangyu Li)
the China Postdoctoral Science Foundation(Grant No.2022M720677,Xiangyu Li)
the Liaoning Provincial Natural Science Foundation of China(Grant No.2023-BS-052,Xiangyu Li)
the Fundamental Research Funds for the Central Universities(Grant No.N2302015,Xiangyu Li)
the State Key Laboratory of Marine Coatings Funded Project(Grant No.2024020800027,Xiangyu Li).
