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Mechanism Insights in Anticorrosion Performance of Waterborne Epoxy Coatings Reinforced by PEI-Functionalized Boron Nitride Nanosheets.
Wang, Shufen; Tang, Jiapeng; Xiang, Hailing; Wei, Chunxiang; Huang, Junjun; Chen, Zhenming; Hu, Kunhong; Han, Chengliang; Zhu, SanE; Ding, Yunsheng.
Afiliación
  • Wang S; Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China.
  • Tang J; Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China.
  • Xiang H; Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China.
  • Wei C; Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China.
  • Huang J; Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China.
  • Chen Z; Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou City 542899, P. R. China.
  • Hu K; Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China.
  • Han C; Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China.
  • Zhu S; Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China.
  • Ding Y; Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei 230009, Anhui, P. R. China.
Langmuir ; 40(21): 10980-10991, 2024 May 28.
Article en En | MEDLINE | ID: mdl-38739526
ABSTRACT
Functionalized hexagonal boron nitride nanosheets (BNNSs) have arisen as compelling anticorrosive additives, yet the precise mechanism of their corrosion resistance enhancement in coatings remains unclear. Here, polyethylenimine functionalized BNNSs (PEI-BNNSs) with approximately 6-11 layers were prepared through a "one-step" method. Then, the PEI-BNNSs/Waterborne epoxy (WEP) composite coatings were incorporated via the waterborne latex blending method for the anticorrosion of the Q235 substrate. The impedance modulus (|Z|f = 0.01 Hz) of 0.5 wt % PEI-BNNSs/WEP composite coating soaked in 3.5 wt % NaCl solution for 35 days increased by 4 orders of magnitude compared to pure WEP coating, exhibiting exceptional long-term resistance against corrosion. The positron annihilation lifetime spectroscopy and corrosion product analysis demonstrated that the reinforced anticorrosion capabilities are not solely ascribed to the "tortuous path effect" arising from BNNSs impermeability. These mechanisms also encompass the reduction in free volume fraction and radius of the free volume cavities within the composite coating brought about by the PEI molecules. Additionally, the increase in coating adhesion, promoted by PEI, plays an important role in augmenting the barrier properties against corrosive agents. This study provided a full comprehension of the role played by functionalized BNNSs in fortifying the anticorrosion attributes of WEP coatings.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Langmuir Asunto de la revista: QUIMICA Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Langmuir Asunto de la revista: QUIMICA Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos