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| Thermal Conductivity and Corrosion Resistance of Epoxy Composite Coatings with Polydopamine Modified Mult-scale Boron Nitrides |
LIU Suyun1, LI Wanting2, ZHOU Runqi1, LIU Rui2( ), DONG Zhijun1, LIU Li2, WANG Fuhui2 |
1.Institute of Technology for Future Industry, Shenzhen University of Information Technology, Shenzhen 518172, China
2.Corrosion and Protection Center, School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China |
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Cite this article:
LIU Suyun, LI Wanting, ZHOU Runqi, LIU Rui, DONG Zhijun, LIU Li, WANG Fuhui. Thermal Conductivity and Corrosion Resistance of Epoxy Composite Coatings with Polydopamine Modified Mult-scale Boron Nitrides. Journal of Chinese Society for Corrosion and protection, 2026, 46(3): 767-776.
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Abstract The effect of the addition of polydopamine modified multi-scale boron nitrides (PDA-BN) on the thermal conductivity and corrosion resistance of epoxy resin composite coatings was assessed, special attention was paid to the influence of the addition of polydopamine modified multi-scale BN with different ratios on the performance of epoxy composite coating, then the optimal ratio for different dopamine modified multi-scale BNs was acquired. The results showed that the addition of the multi-scale PDA-BN can improve the thermal conductivity of epoxy coatings. The optimal ratio of PDA-BN (5-10 μm) to PDA-BN (1-2 μm) is 5:1, and when the total addition amount of PDA-BNs is 10%, the thermal conductivity can reach 0.3748 W·m-1·K-1. In addition, the thermal conductivity of the coatings increases with the increase of the amount of multi-scale PDA-BN addition. When the amount is low (5%-20%), the multi-scale PDA-BN are uniformly dispersed, which can improve the protective performance of the epoxy composite coatings. When the addition reaches 30%, aggregations defects appear inside the coatings, and the protective performance of PDA-BN epoxy composite coatings sharply decreases. 15% multi-scale PDA-BN addition in the composite coatings has a higher thermal conductivity (0.4207 W·m-1·K-1) and the optimal protective performance (|Z|0.01 Hz of the coatings maintained 1.47 × 109 Ω·cm2) even after immersion in 3.5%NaCl solution for 14 d.
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Received: 10 June 2025
32134.14.1005.4537.2025.177
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| Fund: Shenzhen Science and Technology Program(JCYJ20241202130800001);Shenzhen Science and Technology Program(KCXFZ20240903094159005);Shenzhen Science and Technology Program(20220817212651001);Guangdong Provincial Department of Education Project(2023KTSCX323) |
Corresponding Authors:
LIU Rui, E-mail: liurui@mail.neu.edu.cn
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