论文标题
各向异性一层碳纳米管/氮化硼/橡胶复合材料及其在电磁屏蔽中的应用
Anisotropic layer-by-layer carbon nanotubes/boron nitride/rubber composite and its application in electromagnetic shielding
论文作者
论文摘要
具有各向异性特性的多功能聚合物复合材料在满足多任务材料需求不断增长的情况下引起了人们的兴趣。在这项工作中，通过将碳纳米管（CNT）（CNT）的替代组装组合组合组合来制造各向异性聚合物复合材料，并在天然橡胶乳胶上（NR）组合碳纳米管（CNT）和六角形硝基硼（HBN）。分层复合材料表现出各向异性的热电导率和电导率，这些导电性是通过层制剂量身定制的。最好的复合材料由四层NR组成，该NR通过8个PHR（零件橡胶）CNT（〜7.4 wt％）和4个具有12 phr HBN（〜10.7 wt％）的交替层组成。该复合材料表现出10.41+-0.14 dB MM-1在10.3 GHz时具有22.41+-0.14 dB MM-1的屏蔽有效性，而导热率则等于0.25 W/（MK）。此外，当分层复合材料用作电热加热器时，表面的稳定温度约为103 c。 2分钟，输入偏置为2.5V。
Multifunctional polymer composites with anisotropic properties are attracting interests as they fulfil the growing demand of multitasking materials. In this work, anisotropic polymer composites are fabricated by combining the layer-by-layer (LBL) filtration method with the alternative assembling of carbon nanotubes (CNTs) and hexagonal boron nitride flakes (hBN) on natural rubber latex particles (NR). The layered composites exhibit anisotropic thermal and electrical conductivities, which are tailored through the layer formulations. The best composite consists of four layers of NR modified with 8 phr (parts per Hundred Rubber) CNTs (~7.4 wt%) and four alternated layers with 12 phr hBN (~10.7 wt%). The composites exhibit an electromagnetic interference (EMI) shielding effectiveness of 22.41+-0.14 dB mm-1 at 10.3 GHz and a thermal conductivity equal to 0.25 W/(mK). Furthermore, when the layered composite is used as an electrical thermal heater the surface reaches a stable temperature of ~103 C in approx. 2 min, with an input bias of 2.5 V.
