聚多巴胺改性多尺寸氮化硼环氧复合涂层导热防腐性能研究

doi:10.11902/1005.4537.2025.177

中国腐蚀与防护学报

2026, Vol. 46

Issue (3): 767-776 CSTR: 32134.14.1005.4537.2025.177 DOI: 10.11902/1005.4537.2025.177

研究报告

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聚多巴胺改性多尺寸氮化硼环氧复合涂层导热防腐性能研究

刘素云¹, 李婉婷², 周润琪¹, 刘叡²(

), 董志君¹, 刘莉², 王福会²

^1.深圳信息职业技术大学未来产业技术研究院深圳 518172
^2.东北大学材料科学与工程学院腐蚀与防护中心沈阳 110819

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

引用本文:

刘素云, 李婉婷, 周润琪, 刘叡, 董志君, 刘莉, 王福会. 聚多巴胺改性多尺寸氮化硼环氧复合涂层导热防腐性能研究[J]. 中国腐蚀与防护学报, 2026, 46(3): 767-776.
Suyun LIU, Wanting LI, Runqi ZHOU, Rui LIU, Zhijun DONG, Li LIU, Fuhui WANG. Thermal Conductivity and Corrosion Resistance of Epoxy Composite Coatings with Polydopamine Modified Mult-scale Boron Nitrides[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(3): 767-776.

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摘要:

为了探究多尺寸的聚多巴胺改性氮化硼(PDA-BN)对环氧树脂复合涂层导热防腐性能的影响，采用PDA对不同尺寸的BN进行改性，研究不同尺寸PDA-BN的配比对环氧复合涂层导热性能确定PDA-BN的尺寸配比，研究最佳配比PDA-BN的添加量对环氧复合涂层导热防腐性能的影响并阐明涂层防护机制。结果表明，不同配比杂化尺寸PDA-BN的添加均能够提升环氧复合涂层的导热性能，PDA-BN₁与PDA-BN₂的最佳配比为5∶1，当添加量为10%时，导热系数可达0.3748 W·m^-1·K^-1。此外，涂层的导热系数随杂化尺寸PDA-BN添加量的增加而增大，添加量较低时(5%~20%)，杂化尺寸PDA-BN在涂层内部均匀分散，能够提高环氧涂层的防护性能。添加量达到30%后，内部出现团聚缺陷，复合涂层的防护性能急剧下降。添加15%杂化尺寸PDA-BN复合涂层具有较大的导热系数(0.4207 W·m^-1·K^-1)和最优的防护性能(在3.5%NaCl溶液中浸泡14 d后，涂层|Z|_{0.01 Hz}保持在1.47 × 10⁹ Ω·cm²)。

关键词 ：氮化硼, 改性, 有机涂层, 导热性能, 防护性能

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.

Key words： boron nitrides (BN) modification organic coatings thermal conductivity anticorrosion performance

收稿日期: 2025-06-10 32134.14.1005.4537.2025.177

ZTFLH:

TG174

基金资助:深圳市科技计划(JCYJ20241202130800001);深圳市科技计划(KCXFZ20240903094159005);深圳市科技计划(20220817212651001);广东省教育厅项目(2023KTSCX323)

通讯作者: 刘叡，E-mail：liurui@mail.neu.edu.cn，研究方向为腐蚀电化学、极端环境金属腐蚀与防护

Corresponding author: LIU Rui, E-mail: liurui@mail.neu.edu.cn

作者简介: 刘素云，女，1988年生，博士，副教授

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.177 或 https://www.jcscp.org/CN/Y2026/V46/I3/767

图1 BN1、BN2、PDA-BN1和PDA-BN2的XRD谱图、XPS谱图以及C 1s和N 1s的解析谱

表1 PDA改性前后BN中各元素含量 (atomic fraction / %)

图2 BN1，PDA-BN1, BN2及PDA-BN2涂层的SEM 形貌

图3 EP以及不同PDA-BN环氧复合涂层的导热系数结果

图4 静置一定时间后的多尺寸BN-环氧树脂-二甲苯分散液和PDA-BN-环氧树脂-二甲苯分散液的照片

图5 EP，PDA-BN-5/EP，PDA-BN-10/EP，PDA-BN-15/EP，PDA-BN-20/EP，PDA-BN-30/EP涂层的SEM截面形貌

图6 EP，PDA-BN-5/EP，PDA-BN-10/EP，PDA-BN-15/EP，PDA-BN-20/EP，PDA-BN-30/EP涂层的Nyquist图和Bode图及对应的等效电路

图7 涂层在3.5%NaCl溶液中浸泡不同时间低频阻抗模值|Z|0.01 Hz以及Rct的拟合结果

图8 多尺寸的PDA-BN导热防腐机制

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