Pavlou Christos, Koutroumanis Nikolaos, Manikas Anastasios C, Pastore Carbone Maria Giovanna, Paterakis George, Galiotis Costas
Institute of Chemical Engineering Sciences, Foundation of Research and Technology- Hellas (FORTH/ICE-HT), Stadiou Street, Platani, Patras 26504, Greece.
Department of Microelectronics, Faculty of Electrical Engineering, Mathematics and Computer Science, Delft University of Technology, Delft, AA 2600, The Netherlands.
ACS Appl Mater Interfaces. 2025 Jan 8;17(1):2000-2009. doi: 10.1021/acsami.4c17273. Epub 2024 Dec 27.
Due to their outstanding electrical and thermal properties, graphene and related materials have been proposed as ideal candidates for the development of lightweight systems for thermoelectric applications. Recently, the nanolaminate architecture that entails alternation of continuous graphene monolayers and ultrathin polymer films has been proposed as an efficient route for the development of composites with impressive physicochemical properties. In this work, we present a novel layer-by-layer approach for the fabrication of highly ordered, flexible, heat-resistant, and electrically conductive freestanding graphene/polymer nanolaminates through alternating Marangoni-driven self-assembly of reduced graphene oxide (rGO) and poly(ether imide) (PEI) films. The microstructure, the mechanical behavior, and the electrical conductivity of the produced Marangoni rGO/PEI nanolaminates are studied as a function of rGO content (up to 5.2 vol %). These nanolaminate thin films show excellent heating properties, with fast heating responses at high temperatures to maximum temperatures at ca. 325 °C due to the Joule heating effect, at maximum rates of 444 °C/s, thus bringing forward an impressive potential of these materials for electrothermal applications. The areal power density was found to be 30 kW/m for the 5.20% volume fraction of rGO and 325 °C temperature. The robust highly flexible heaters developed in this research hold great promise for a whole range of applications.
由于石墨烯及相关材料具有出色的电学和热学性能，它们已被视为开发用于热电应用的轻质系统的理想候选材料。最近，一种包含连续石墨烯单分子层和超薄聚合物薄膜交替排列的纳米层状结构，被提议作为开发具有令人印象深刻的物理化学性质的复合材料的有效途径。在这项工作中，我们提出了一种新颖的逐层方法，通过氧化石墨烯（rGO）和聚醚酰亚胺（PEI）薄膜的交替马兰戈尼驱动自组装，来制备高度有序、柔性、耐热且导电的独立式石墨烯/聚合物纳米层压板。研究了所制备的马兰戈尼rGO/PEI纳米层压板的微观结构、力学行为和电导率随rGO含量（高达5.2体积%）的变化。这些纳米层压薄膜表现出优异的加热性能，由于焦耳热效应，在高温下能快速升温至约325°C的最高温度，升温速率最高可达444°C/s，从而展现出这些材料在电热应用方面的巨大潜力。对于rGO体积分数为5.20%且温度为325°C的情况，面功率密度为30 kW/m²。本研究中开发的坚固且高度柔性的加热器在一系列应用中具有巨大潜力。
