作者：Ying Li*, Changdan Gong, Chenggong Li, Kunpeng Ruan, Chao Liu, Huan Liu and Junwei Gu*
关键字：Liquid crystal monomer (LCM)，Polyvinyl alcohol (PVA)，Intrinsic high thermal conductivity，Hydrogen bond interaction
论文来源：期刊
具体来源：Journal of Materials Science & Technology
发表时间：2021年

AbstractPolymer-dispersed liquid crystal (PDLC) films comprising polyvinyl alcohol (PVA) and liquid crystal monomer (LCM) were successfully obtained by the method of solution casting & thermal compressing. LCM was distributed orderly in PVA matrix by hydrogen bond interaction, to form PVA-LCM interpenetrating-layered networks. When the mass fraction of LCM was up to 35 wt%, the corresponding in-plane thermal conductivity coefficient (λ_//) of PDLC film was significantly increased to 1.41 Wm^-1K^-1, about 10.8 times that of neat PVA (0.13 Wm^-1K^-1). High intrinsic λ// values of PDLC films were mainly attributed to the microscopic-ordered structures formed by ordered stacking of LCM, ordered arrangement of PVA chains, and their hydrogen bond interaction. This work would offer a new way to design and prepare novel intrinsic high thermal conductive polymers.

通过溶液浇铸和热压成型工艺将液晶单体（LCM）分散在聚乙烯醇（PVA）基体中，制备了液晶单体聚乙烯醇分散膜（PDLC）。LCM通过氢键作用均匀分散在PVA基体中，形成了PVA-LCM层状互穿网络结构。当LCM的用量达到35 wt%时，PDLC膜的面内导热系数（λ_//）高达1.41 Wm^-1K^-1，约为纯PVA（0.13 Wm^-1K^-1）的10.8倍。PDLC膜的高λ//主要归因于LCM层叠形成的微观有序结构、PVA分子链的规整排列以及LCM与PVA分子链间的氢键作用力。这项工作为设计和制备本征型高导热高分子材料提供了新的途径。