氮化硼纳米片的制备与热管理性能研究
摘要
随着电子器件向高功率和小型化方向发展，热管理问题成为制约其性能提升的关键瓶颈之一。氮化硼纳米片（BNNS）因其优异的热导率、良好的电绝缘性和化学稳定性，被认为是理想的热管理材料。本研究旨在开发一种高效、绿色的BNNS制备方法，并系统评估其在热管理领域的应用潜力。通过液相剥离结合表面修饰技术，成功制备了高质量的BNNS，并对其形貌、结构及热学性能进行了详细表征。结果表明，所制备的BNNS具有超薄的二维结构和较大的比表面积，其面内热导率高达600 W/mK。进一步将BNNS与聚合物基体复合，制备出具有优异热导率和机械性能的复合材料。实验发现，仅添加3 wt%的BNNS即可使复合材料的热导率提高150%，同时保持良好的电绝缘性。这一显著提升归因于BNNS在基体中形成了高效的热传导网络。本研究不仅提出了一种可规模化生产的BNNS制备策略，还揭示了BNNS在热管理领域的重要应用价值，为高性能热管理材料的设计提供了新思路。
关键词：氮化硼纳米片；热管理材料；液相剥离
Abstract
With the development of electronic devices towards high power and miniaturization, thermal management has become one of the key bottlenecks limiting performance enhancement. Boron nitride nanosheets (BNNS) are considered ideal thermal management materials due to their excellent thermal conductivity, good electrical insulation, and chemical stability. This study aims to develop an efficient and green method for BNNS preparation and systematically evaluate their potential in thermal management applications. High-quality BNNS were successfully prepared via liquid-phase exfoliation combined with surface modification technology, and their morphology, structure, and thermal properties were thoroughly characterized. The results indicate that the prepared BNNS possess an ultrathin two-dimensional structure with a large specific surface area, exhibiting an in-plane thermal conductivity as high as 600 W/mK. Furthermore, BNNS were incorporated into polymer matrices to fabricate composites with superior thermal conductivity and mechanical properties. Experimental findings revealed that adding only 3 wt% of BNNS could enhance the thermal conductivity of the composites by 150%, while maintaining good electrical insulation. This significant improvement is attributed to the formation of an efficient thermal conduction network by BNNS within the matrix. This research not only proposes a scalable strategy for BNNS preparation but also highlights their critical application value in thermal management, providing new insights into the design of high-performance thermal management materials.
Keywords：Boron Nitride Nanosheets; Thermal Management Materials; Liquid Phase Exfoliation
目 录
摘要 I
Abstract II
一、绪论 1
(一) 氮化硼纳米片研究背景与意义 1
(二) 国内外研究现状分析 1
(三) 本文研究方法与技术路线 1
二、氮化硼纳米片的制备方法研究 2
(一) 制备方法概述与分类 2
(二) 化学气相沉积法的研究 2
(三) 液相剥离法制备工艺优化 3
(四) 制备方法对比与选择 4
三、氮化硼纳米片的结构与性能表征 4
(一) 表征技术的基本原理 4
(二) 微观结构分析方法 5
(三) 热导率测试与评估 5
(四) 结构与性能的相关性研究 6
四、氮化硼纳米片在热管理中的应用研究 6
(一) 热管理材料的需求与挑战 6
(二) 氮化硼纳米片的散热性能研究 7
(三) 复合材料中氮化硼纳米片的作用机制 7
(四) 实际应用场景分析与展望 8
结 论 9
参考文献 10
摘要
随着电子器件向高功率和小型化方向发展，热管理问题成为制约其性能提升的关键瓶颈之一。氮化硼纳米片（BNNS）因其优异的热导率、良好的电绝缘性和化学稳定性，被认为是理想的热管理材料。本研究旨在开发一种高效、绿色的BNNS制备方法，并系统评估其在热管理领域的应用潜力。通过液相剥离结合表面修饰技术，成功制备了高质量的BNNS，并对其形貌、结构及热学性能进行了详细表征。结果表明，所制备的BNNS具有超薄的二维结构和较大的比表面积，其面内热导率高达600 W/mK。进一步将BNNS与聚合物基体复合，制备出具有优异热导率和机械性能的复合材料。实验发现，仅添加3 wt%的BNNS即可使复合材料的热导率提高150%，同时保持良好的电绝缘性。这一显著提升归因于BNNS在基体中形成了高效的热传导网络。本研究不仅提出了一种可规模化生产的BNNS制备策略，还揭示了BNNS在热管理领域的重要应用价值，为高性能热管理材料的设计提供了新思路。
关键词：氮化硼纳米片；热管理材料；液相剥离
Abstract
With the development of electronic devices towards high power and miniaturization, thermal management has become one of the key bottlenecks limiting performance enhancement. Boron nitride nanosheets (BNNS) are considered ideal thermal management materials due to their excellent thermal conductivity, good electrical insulation, and chemical stability. This study aims to develop an efficient and green method for BNNS preparation and systematically evaluate their potential in thermal management applications. High-quality BNNS were successfully prepared via liquid-phase exfoliation combined with surface modification technology, and their morphology, structure, and thermal properties were thoroughly characterized. The results indicate that the prepared BNNS possess an ultrathin two-dimensional structure with a large specific surface area, exhibiting an in-plane thermal conductivity as high as 600 W/mK. Furthermore, BNNS were incorporated into polymer matrices to fabricate composites with superior thermal conductivity and mechanical properties. Experimental findings revealed that adding only 3 wt% of BNNS could enhance the thermal conductivity of the composites by 150%, while maintaining good electrical insulation. This significant improvement is attributed to the formation of an efficient thermal conduction network by BNNS within the matrix. This research not only proposes a scalable strategy for BNNS preparation but also highlights their critical application value in thermal management, providing new insights into the design of high-performance thermal management materials.
Keywords：Boron Nitride Nanosheets; Thermal Management Materials; Liquid Phase Exfoliation
目 录
摘要 I
Abstract II
一、绪论 1
(一) 氮化硼纳米片研究背景与意义 1
(二) 国内外研究现状分析 1
(三) 本文研究方法与技术路线 1
二、氮化硼纳米片的制备方法研究 2
(一) 制备方法概述与分类 2
(二) 化学气相沉积法的研究 2
(三) 液相剥离法制备工艺优化 3
(四) 制备方法对比与选择 4
三、氮化硼纳米片的结构与性能表征 4
(一) 表征技术的基本原理 4
(二) 微观结构分析方法 5
(三) 热导率测试与评估 5
(四) 结构与性能的相关性研究 6
四、氮化硼纳米片在热管理中的应用研究 6
(一) 热管理材料的需求与挑战 6
(二) 氮化硼纳米片的散热性能研究 7
(三) 复合材料中氮化硼纳米片的作用机制 7
(四) 实际应用场景分析与展望 8
结 论 9
参考文献 10
