Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China.
China-EU Joint Lab for Nanophononics, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China.
Adv Mater. 2018 Apr;30(17):e1705544. doi: 10.1002/adma.201705544. Epub 2018 Mar 24.
Polymers are usually considered as thermal insulators, and their applications are limited by their low thermal conductivity. However, recent studies have shown that certain polymers have surprisingly high thermal conductivity, some of which are comparable to that in poor metals or even silicon. Here, the experimental achievements and theoretical progress of thermal transport in polymers and their nanocomposites are outlined. The open questions and challenges of existing theories are discussed. Special attention is given to the mechanism of thermal transport, the enhancement of thermal conductivity in polymer nanocomposites/fibers, and their potential application as thermal interface materials.
聚合物通常被认为是热绝缘体，其应用受到低导热系数的限制。然而，最近的研究表明，某些聚合物具有出人意料的高导热系数，其中一些与较差金属甚至硅相当。本文概述了聚合物及其纳米复合材料中热输运的实验成果和理论进展。讨论了现有理论存在的问题和挑战。特别关注了热输运的机制、聚合物纳米复合材料/纤维中导热系数的增强及其作为热界面材料的潜在应用。
