Bai Yageng, Chen Rui, Wen Fengyu, He Yashu, Ma Jierun, Tan Haoyuan, Gu Yuxuan, Lian Pengbo, Mu Jianxin
Key Laboratory of High Performance Plastics, Ministry of Education, National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
Light Industry and Chemical Engineering, Guangdong University of Technology, Canton, 510006, P. R. China.
Small. 2025 May 22:e2503573. doi: 10.1002/smll.202503573.
The continuous advancement and miniaturization of modern electronics have increased challenges related to electromagnetic interference (EMI) and thermal management. Polymer materials are commonly used for thermal regulation and EMI shielding because of their low weight, cost-effectiveness, and ease of processing. However, achieving both high electromagnetic shielding effectiveness (SE) and superior thermal conductivity (TC) in polymeric systems remains a major scientific challenge. In this study, a lightweight and flexible amino-functionalized multiwalled carbon nanotube-graphene nanoplatelet/poly(p-phenylene benzodioxazole)/poly(ether-ether-ketone) composite film (NH-MWCNTs&GnPs@PBO/PEEK, NH-MGPP) is fabricated using vacuum-assisted filtration. As a result, the NH-MGPP film (0.05 mm thick) exhibited exceptional EMI shielding performance (71.47 dB) and in-plane thermal conductivity (36.78 W mK). The composite also demonstrated rapid Joule heating kinetics and an efficient photothermal response, enabling effective thermal management and energy harvesting capabilities. When integrated into a solar-thermoelectric generator, the NH-MGPP film produced an output voltage of 1004.9 mV under 5 kW m simulated sunlight irradiation, confirming its high photo-thermal-electrical energy conversion efficiency. This study presents an innovative approach for designing and developing flexible composite films with excellent electromagnetic shielding properties and efficient heat dissipation capabilities. Additionally, it introduces a new method for the effective utilization of renewable energy.
现代电子技术的不断进步和小型化增加了与电磁干扰（EMI）和热管理相关的挑战。聚合物材料因其重量轻、成本效益高和易于加工而常用于热调节和EMI屏蔽。然而，在聚合物体系中同时实现高电磁屏蔽效能（SE）和优异的热导率（TC）仍然是一个重大的科学挑战。在本研究中，采用真空辅助过滤法制备了一种轻质且柔性的氨基功能化多壁碳纳米管-石墨烯纳米片/聚对苯撑苯并二恶唑/聚醚醚酮复合薄膜（NH-MWCNTs&GnPs@PBO/PEEK，NH-MGPP）。结果，NH-MGPP薄膜（厚0.05毫米）表现出优异的EMI屏蔽性能（71.47分贝）和面内热导率（36.78瓦/米·开尔文）。该复合材料还表现出快速的焦耳热动力学和高效的光热响应，具有有效的热管理和能量收集能力。当集成到太阳能热电发电机中时，NH-MGPP薄膜在5千瓦/平方米的模拟阳光照射下产生了1004.9毫伏的输出电压，证实了其高光热电能转换效率。本研究提出了一种设计和开发具有优异电磁屏蔽性能和高效散热能力的柔性复合薄膜的创新方法。此外，它还引入了一种有效利用可再生能源的新方法。
