Ying Li*, Changdan Gong, Chenggong Li, Kunpeng Ruan, Chao Liu, Huan Liu and Junwei Gu*. Liquid crystalline texture and hydrogen bond on the thermal conductivities of intrinsic thermal conductive polymer films. Journal of Materials Science & Technology, 2021, 82: 250-256. 2019IF=6.155.（1區(qū)材料科學(xué)Top期刊，中國(guó)科技期刊卓越行動(dòng)計(jì)劃入選項(xiàng)目-重點(diǎn)期刊類項(xiàng)目）
(https://doi.org/10.1016/j.jmst.2021.01.017)
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 W m-1 K-1, about 10.8 times that of neat PVA (0.13 W m-1 K-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.通過(guò)溶液澆鑄和熱壓成型工藝將液晶單體（LCM）分散在聚乙烯醇（PVA）基體中，制備了液晶單體聚乙烯醇分散膜（PDLC）。LCM通過(guò)氫鍵作用均勻分散在PVA基體中，形成了PVA-LCM層狀互穿網(wǎng)絡(luò)結(jié)構(gòu)。當(dāng)LCM的用量達(dá)到35 wt%時(shí)，PDLC膜的面內(nèi)導(dǎo)熱系數(shù)（λ//）高達(dá)1.41 W m-1 K-1，約為純PVA（0.13 W m-1 K-1）的10.8倍。PDLC膜的高λ//主要?dú)w因于LCM層疊形成的微觀有序結(jié)構(gòu)、PVA分子鏈的規(guī)整排列以及LCM與PVA分子鏈間的氫鍵作用力。這項(xiàng)工作為設(shè)計(jì)和制備本征型高導(dǎo)熱高分子材料提供了新的途徑。
