Preparation of PVA/GO/h-BN Janus Film with High Thermal Conductivity and Excellent Flexibility via a Density Deposition Self-assembly Method

IF 4.1 2区 化学 Q2 POLYMER SCIENCE Chinese Journal of Polymer Science Pub Date : 2024-06-07 DOI:10.1007/s10118-024-3154-0
Fang-Hua Luo, Zhi-Tao Dong, Guo-Hua Chen, Chen Ma, Huai-Yuan Wang
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Abstract

Janus films with asymmetric physical/chemical properties have attracted considerable attention due to their promising applications in personal thermal management, electronic skins, sensors, actuators, etc. However, traditional methods for fabricating Janus films conventionally need the assistance of an interface or auxiliary equipment, which are usually complex and time-consuming. Herein, flexible poly(vinyl alcohol) (PVA)/graphene oxide (GO)/h-BN (recorded as PVA/GO/h-BN) Janus films with thermally, optically, and electrically anisotropic properties are fabricated by a simple density deposition self-assembly method, which just utilizes the density difference between GO and h-BN during water evaporation. Experimental results show that the two sides of the acquired Janus films have obvious asymmetric characteristics. In the original state of the PVA/GO/h-BN Janus films, the thermal conductivity of the GO side (10.06 W·m−1·K−1) is generally lower than that of the h-BN side (10.48 W·m−1·K−1). But after GO is reduced, the thermal conductivity of the rGO side reaches 12.17 W·m−1·K−1, surpassing that of the h-BN side. In addition, the relative reflectance of the h-BN side of Janus film is also significantly higher than that of the rGO side, and the surface resistance difference between the two sides is about 4 orders of magnitude. The prepared PVA/GO/h-BN Janus films show great application potential in human thermal management, light conversion switches, and electronic skins. This study provides a simple and versatile strategy for fabricating Janus films with multifunctional (such as thermal, optical, and electrical) anisotropies.

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通过密度沉积自组装法制备具有高导热性和优异柔韧性的 PVA/GO/h-BN Janus 薄膜
具有非对称物理/化学特性的 Janus 薄膜因其在个人热管理、电子皮肤、传感器、致动器等方面的广阔应用前景而备受关注。然而,传统的 Janus 薄膜制造方法需要接口或辅助设备的协助,通常既复杂又耗时。本文通过一种简单的密度沉积自组装方法,利用水蒸发过程中 GO 和 h-BN 之间的密度差,制备出具有热、光、电各向异性的柔性聚乙烯醇(PVA)/氧化石墨烯(GO)/h-BN(记为 PVA/GO/h-BN)Janus 薄膜。实验结果表明,获得的 Janus 薄膜的两面具有明显的不对称特性。在 PVA/GO/h-BN Janus 薄膜的原始状态下,GO 面的热导率(10.06 W-m-1-K-1)普遍低于 h-BN 面的热导率(10.48 W-m-1-K-1)。但在减少 GO 后,rGO 面的热导率达到了 12.17 W-m-1-K-1,超过了 h-BN 面的热导率。此外,Janus 薄膜 h-BN 侧的相对反射率也明显高于 rGO 侧,两侧的表面电阻相差约 4 个数量级。所制备的 PVA/GO/h-BN Janus 薄膜在人体热管理、光转换开关和电子皮肤等方面显示出巨大的应用潜力。这项研究为制备具有多功能(如热、光和电)各向异性的 Janus 薄膜提供了一种简单而多用途的策略。
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来源期刊
Chinese Journal of Polymer Science
Chinese Journal of Polymer Science 化学-高分子科学
CiteScore
7.10
自引率
11.60%
发文量
218
审稿时长
6.0 months
期刊介绍: Chinese Journal of Polymer Science (CJPS) is a monthly journal published in English and sponsored by the Chinese Chemical Society and the Institute of Chemistry, Chinese Academy of Sciences. CJPS is edited by a distinguished Editorial Board headed by Professor Qi-Feng Zhou and supported by an International Advisory Board in which many famous active polymer scientists all over the world are included. The journal was first published in 1983 under the title Polymer Communications and has the current name since 1985. CJPS is a peer-reviewed journal dedicated to the timely publication of original research ideas and results in the field of polymer science. The issues may carry regular papers, rapid communications and notes as well as feature articles. As a leading polymer journal in China published in English, CJPS reflects the new achievements obtained in various laboratories of China, CJPS also includes papers submitted by scientists of different countries and regions outside of China, reflecting the international nature of the journal.
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