首页|Hydrogen and DA bond-based self-healing epoxy-modified polyurea composite coating with anti-cavitation,anticorrosion,antifouling,and strong adhesion properties

Hydrogen and DA bond-based self-healing epoxy-modified polyurea composite coating with anti-cavitation,anticorrosion,antifouling,and strong adhesion properties

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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.

PolyureaEpoxy resinAnti-cavitationAntifoulingAnticorrosionSelf-healingAdhesion

Wei Tian、Zhiling Guo、Shunli Wang、Haitao Yu、Shuai Wang、Huichao Jin、Limei Tian

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Key Laboratory of Bionic Engineering,Ministry of Education,Jilin University,Changchun,130022,China

Weihai Institute for Bionics,Jilin University,Weihai,264207,China

National Natural Science Foundation of ChinaMajor Science and Technology Special Projects of Jilin ProvinceYoung and Middle aged Technology Innovation LeadingIalents,the Team Projects of Science and Technology Development Plan of J

52375286YDZI202203CGZH03520230508041RC

2024

10.1016/j.jmst.2023.11.031

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.187(20)
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