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[目的]将石墨烯(GE)和六方氮化硼(h-BN)作为改性剂添加到水性有机硅改性环氧树脂氨基烤漆(EP)中，以制备一种GE/h-BN水性散热涂层，并探讨最佳h-BN含量条件下添加GE对涂层热导率、散热性能及热稳定性的影响。[方法]通过热导率、散热温差和热重分析测试来确定涂层的散热和热稳定性效果，采用扫描电镜考察涂层的内部微观结构，并探讨了散热机制。[结果]添加h-BN能提高涂层的散热效果和热稳定性，其最佳引入量约为24.0%(质量分数)。在此基础上，用不同含量的GE作进一步改性。试验结果证明，少量GE对涂层的散热性能有促进效果，过量则会导致涂层综合性能下降，GE的最佳引入量约为4.0%(质量分数)。[结论]当GE含量过高时，其会与h-BN发生团聚，这是导致涂层性能下降的主要原因。明确涂层中GE和h-BN之间的共存关系有望进一步提升水性有机硅改性环氧树脂氨基烤漆的综合性能。
Abstract：[Objective] To prepare a waterborne heat-dissipation coating, graphene(GE) and hexagonal boron nitride(h-BN) was introduced as modifiers into a waterborne organosilicon-modified epoxy amino baking paint(EP). The effect of GE addition on the thermal conductivity, heat dissipation performance, and thermal stability of the coating under the optimal h-BN content was studied. [Method] The heat dissipation and thermal stability of coating were evaluated through thermal conductivity measurement, heat dissipation temperature difference testing, and thermogravimetric analysis. The internal microstructure of the coating was examined by scanning electron microscopy(SEM), and the heat dissipation mechanism was discussed. [Result] The addition of h-BN enhanced the heat dissipation efficiency and thermal stability of the coating, with an optimal content being approximately 24.0% by mass. On this basis, further modification was conducted using different dosages of GE. The experimental results showed that a small dosage of GE promoted the heat dissipation performance of the coating, while excessive dosage of GE led to a deterioration of other properties of the coating. The optimal GE dosage was approximately 4.0% by mass. [Conclusion] Excessive GE content causes aggregation with h-BN, which is the main reason for the degradation of coating performance. Clarifying the coexistence relationship between GE and h-BN in the coating is expected to further improve the comprehensive performance of the waterborne organosilicon-modified epoxy amino baking paint.
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基本信息:
DOI：10.19289/j.1004-227x.2026.05.004
中图分类号:TQ630.1
引用信息:
[1]杨辉帆,贺若梅,令狐茂亚,等.石墨烯/六方氮化硼改性水性散热涂层的制备及性能研究[J].电镀与涂饰,2026,45(05):30-38.DOI:10.19289/j.1004-227x.2026.05.004.
2025-09-28
2025
2026-05-18
2026-05-29
2026
1
2026-04-01
2026-04-01
2026-04-01