Abstract
Cavitation,corrosion,and fouling are critical factors that significantly impact the performance of power components in large cargo ships.To address these issues,a composite coating called epoxy-modified polyurea(PUE-FD)has been developed with reproducible self-healing properties.The incorporation of functionally reduced graphene oxide(FrGO)with multiple hydrogen bonds in the coating led to a notable increase of 5.6 MPa in the tensile strength of PUE-FD.This enhancement was accompanied by excellent resistance to cavitation,as evidenced by a mere 2.8 mg mass loss after 60 h of continuous cavitation.Fur-thermore,the inclusion of FrGO exhibited an exceptional barrier effect,providing PUE-FD with superior corrosion protection.The|Z|0.01 Hz value of PUE-FD was 9.01 × 109 Ω cm2 after 15 days of immersion in 3.5 wt％NaCl solution.Additionally,the synergistic effect of 2-octyl-4,5-dichloroisothiazolinone(DCOIT)and FrGO resulted in remarkable antifouling performance,with a bacterial removal rate exceeding 99.4％and a microalgae removal rate of up to nearly 100％for PUE-FD.PUE-FD also demonstrated remarkable photothermal self-healing ability,achieving a self-healing efficiency of 89％within just 60 s of near-infrared irradiation.Moreover,the presence of hydrogen bonds in FrGO contributes to the excellent ad-hesion properties of PUE-FD,resulting in adhesion strengths of more than 10 MPa on copper,stainless steel,and aluminum surfaces.This work presents new inspirations for the preparation of multifunctional coatings with anti-cavitation,anticorrosion,antifouling,and self-healing properties.
基金项目
National Natural Science Foundation of China(52375286)
Major Science and Technology Special Projects of Jilin Province(YDZI202203CGZH035)
Young and Middle aged Technology Innovation LeadingIalents,the Team Projects of Science and Technology Development Plan of J(20230508041RC)
NETL
NSTL
万方数据