Zeranska-Chudek Klaudia, Wróblewska Anna, Kowalczyk Sebastian, Plichta Andrzej, Zdrojek Mariusz
Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland.
Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland.
Materials (Basel). 2021 May 26;14(11):2856. doi: 10.3390/ma14112856.
In the age of mobile electronics and increased aerospace interest, multifunctional materials such as the polymer composites reported here are interesting alternatives to conventional materials, offering reduced cost and size of an electrical device packaging. We report a detailed study of an ecological and dual-functional polymer composite for electromagnetic interference (EMI) shielding and heat management applications. We studied a series of polylactic acid/graphene nanoplatelet composites with six graphene nanoplatelet loadings, up to 15 wt%, and three different flake lateral sizes (0.2, 5 and 25 μm). The multifunctionality of the composites is realized via high EMI shielding efficiency exceeding 40 dB per 1 mm thick sample and thermal conductivity of 1.72 W/mK at 15 wt% nanofiller loading. The EMI shielding efficiency measurements were conducted in the microwave range between 0.2 to 12 GHz, consisting of the highly relevant X-band (8-12 GHz). Additionally, we investigate the influence of the nanofiller lateral size on the studied physical properties to optimize the studied functionalities per given nanofiller loading.
在移动电子时代以及对航空航天兴趣增加的背景下，本文报道的聚合物复合材料等多功能材料是传统材料的有趣替代品，可降低电子设备封装的成本和尺寸。我们报告了一种用于电磁干扰（EMI）屏蔽和热管理应用的生态双功能聚合物复合材料的详细研究。我们研究了一系列聚乳酸/石墨烯纳米片复合材料，其中石墨烯纳米片的负载量有六种，最高可达15 wt%，且有三种不同的片状横向尺寸（0.2、5和25μm）。复合材料的多功能性通过每1mm厚样品超过40dB的高EMI屏蔽效率以及在15wt%纳米填料负载量下1.72W/mK的热导率来实现。EMI屏蔽效率测量在0.2至12GHz的微波范围内进行，其中包括高度相关的X波段（8 - 12GHz）。此外，我们研究了纳米填料横向尺寸对所研究物理性能的影响，以便在给定的纳米填料负载量下优化所研究的功能。
