材料科学
热导率
聚合物
聚合
电导率
单层
复合材料
高分子化学
热的
化学工程
纳米技术
物理化学
物理
工程类
气象学
化学
作者
Anandi Roy,Thomas L. Bougher,Rugang Geng,Yutian Ke,Jason Locklin,Baratunde A. Cola
标识
DOI:10.1021/acsami.6b04429
摘要
A wide variety of recent work has demonstrated that the thermal conductivity of polymers can be improved dramatically through the alignment of polymer chains in the direction of heat transfer. Most of the polymeric samples exhibit high conductivity in either the axial direction of a fiber or in the in-plane direction of a thin film, while the most useful direction for thermal management is often the cross-plane direction of a film. Here we show poly(3-methylthiophene) brushes grafted from phosphonic acid monolayers using surface initiated polymerization can exhibit through-plane thermal conductivity greater than 2 W/(m K), a 6-fold increase compared to spin-coated poly(3-hexylthiophene) samples. The thickness of these films (10-40 nm) is somewhat less than that required in most applications, but the method demonstrates a route toward higher thermal conductivity in covalently grafted, aligned polymer films.
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