Light-weight, flexible, low-voltage electro-thermal film using graphite nanoplatelets for wearable/smart electronics and deicing devices
Light-weight, flexible, low-voltage electro-thermal film using graphite nanoplatelets for wearable/smart electronics and deicing devices
复制标题
使用石墨纳米片的轻质、柔性、低压电热膜，用于可穿戴/智能电子产品和除冰设备
DOI：
10.1016/j.jallcom.2016.12.435
复制
发表时间：
2017-03-30
影响因子：
6.2
通讯作者：
Zhou, Weiwei
中科院分区：
文献类型：
--
作者：
Jiang, Han;Wang, Huatao;Zhou, Weiwei
近年来，石墨烯及石墨烯基材料作为发热材料，由于其优异的性能而受到越来越多的关注。然而，由于它们具有43-2600 Ω sq（-1）的高薄层电阻，因此必须施加12-60 V的相对高的电压用于加热。本文介绍了一种基于纳米石墨片（GNP）的柔性电热薄膜，该薄膜采用间隙涂覆和塑封的方法制备，更适合于穿戴式/智能电子产品，在3 - 5 V的低电压下，可以以25-65 ℃/min的高升温速率和24-32 ℃/min的高降温速率工作，这是由于GNP膜的低电阻率（8.9 m Ω cm）、低薄层电阻（1.51 Ω sq（-1））和高平面导热率（类似于50 W（m K）（-1））。GNP薄膜的高电导率和热导率归因于GNP在微观结构中具有明显的取向性，这可以通过间隙涂布工艺、GNP分散体的固含量和超声剥离制备的GNP质量来控制。GNP电热膜具有良好的加热均匀性和重复性、弯曲加热稳定性和快速的加热响应能力。而且E-GNP易于制备，成本低，制备方法绿色。实验证明，所制备的E-GNP膜可用作热治疗的可穿戴设备、智能手机的超薄加热器，甚至在寒冷的冬天的除冰装置。E-GNP薄膜具有优良的加热性能和良好的柔韧性，在汽车、医疗保健、穿戴设备和智能电子等领域具有广泛的应用前景。(C)2017爱思唯尔B. V.保留所有权利。
Recently, graphene and graphene-based materials used as heating materials have attracted more and more attention due to their outstanding performance. However, a relatively high voltage of 12-60 V has to be applied for heating because of their high sheet resistance of 43-2600 Omega sq(-1). In this paper, lightweight and flexible electro-thermal films using graphite nanoplatelets (GNP) by gap coating and plastic packaging method were present, which were more suitable for wearable/smart electronics and can work at a high heating rate of 25-65 degrees C/min and a high cooling rate of 24-32 degrees C/min under a low voltage of 3 -5 V, due to the low electrical resistivity (8.9 m Omega cm), low sheet resistance (1.51 Omega sq(-1)) and high in plane thermal conductivity (similar to 50 W (m K)(-1)) of GNP films. The high electrical and thermal conductance of GNP films was attributed to the obvious orientation of GNPs in microstructure, which could be controlled by the gap-coating process, the solid content of GNP dispersions and the quality of GNPs fabricated by ultrasonic exfoliation. The GNP electro-thermal (E-GNP) films exhibit outstanding heating capacity, including good heating uniformity & repeatability, good heating stability under bending and fast heating response. Moreover, the E-GNP is easily preparared with low cost, and the preparation method is green. It is experimentally demonstrated that as-prepared E-GNP films can be used as wearable devices for thermal therapy, ultra-thin heaters for smart phones, and even deicing devices in cold winter. The E-GNP films would have a wide range of applications in automobile, healthcare, wearable and smart electronics as heaters, due to their excellent heating performance and good flexibility. (C) 2017 Elsevier B.V. All rights reserved.