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六方氮化硼（h-BN）因其高导热性、电绝缘性和化学稳定性，被广泛用作改善聚合物导热性能的填料。然而，横向尺寸小和相容性差限制了h-BN在热管理方面的性能和应用。本文采用液相超声剥离与硅烷偶联剂KH-560功能化改性，制备了功能化氮化硼纳米片（f-BNNSs）。将其作为导热填料，通过紫外光引发、本体聚合法成功制备了聚丙烯酸压敏胶复合材料（f-BNNSs/PSAs）。研究结果表明：（1）改性后f-BNNSs在基体中的分散性与界面结合显著改善，且剥离与改性过程有效降低了氮化硼的层数与堆叠；（2）随着f-BNNSs填充量增加，复合材料的导热性能显著提升，在填料质量分数为25%时，热导率达0.438 2 W/（m·K），较纯PSAs提高近150%，并呈现较低的渗透阈值（约5%）与更优的散热效率；（3）f-BNNSs的引入在适度保持环形初粘力的同时，显著提高了复合压敏胶的180°剥离强度。这归因于f-BNNSs表面的官能团与聚合物分子链的交联作用、其高比表面积带来的增强效应，以及在基体中的良好分散性。综上所述，本研究通过结构设计与表面功能化，在提升压敏胶导热性能的同时，保持并优化了其核心黏附性能，为开发用于电子热管理的高性能导热压敏胶材料提供了一种有效方法。
Abstract：Hexagonal boron nitride(h-BN) is widely used as a filler to improve the thermal conductivity of polymers due to its high thermal conductivity,electrical insulation,and chemical stability. However,the small lateral size and poor compatibility limit the performance and application of h-BN in thermal management.In this paper,functionalized boron nitride nanosheets(f-BNNSs) were prepared by liquid-phase ultrasonic exfoliation and functionalization modification using silane coupling agent KH-560. Using it as a thermal conductive filler,polyacrylate pressure sensitive adhesive composite materials(f-BNNSs/PSAs) were successfully prepared by UV induced and bulk polymerization method.The research results showed that,(1) The dispersibility and interfacial bonding of f-BNNSs in the matrix were significantly improved after modification,and the exfoliation and modification processes effectively reduced the number of layers and stacking of boron nitride.(2) As the filling amount of f-BNNSs increased,the thermal conductivity of the composite material was significantly improved.When the mass fraction of the filler was 25%,the thermal conductivity reached 0.438 2 W/（m·K）,which was nearly 150% higher than pure PSAs,and exhibited a lower percolation threshold(about 5%) and better heat dissipation efficiency.(3) The introduction of f-BNNSs significantly improved the 180° peel strength of the composite pressure sensitive adhesive while maintaining a moderate initial tack.This was attributed to the crosslinking effect between the functional groups on the surface of f-BNNSs and the polymer molecular chains,the enhancement effect brought by their high specific surface area,and the good dispersibility in the matrix.In summary,this study improved the thermal conductivity of pressure sensitive adhesive while maintaining and optimizing their core adhesion properties through structural design and surface functionalization,providing an effective method for developing highperformance thermally conductive pressure sensitive adhesive materials for electronic thermal management.
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基本信息:
DOI：10.13416/j.ca.2026.01.005
中图分类号:TQ436.3
引用信息:
[1]赵海川,米永振,刘凯,等.六方氮化硼超声剥离和功能化改性及其在聚丙烯酸压敏胶中的应用[J].中国胶粘剂,2026,35(01):14-23.DOI:10.13416/j.ca.2026.01.005.
基金信息:
中央引导地方科技发展资金项目（246Z3707G）
2026-01-29
2026-01-29