High-content graphene-reinforced polymer with bioinspired multilayer structure
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High-content graphene-reinforced polymer with bioinspired multilayer structure Miaomiao Wang1, Qiao Wang1, Lirong Liang1, Hongyao Ding1, Xiaoxu Liang1, and Guoxing Sun1,* 1
Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau SAR, China
Received: 29 May 2020
ABSTRACT
Accepted: 3 August 2020
Polymer/graphene composite films with a nacre-like layered structure have been extensively researched. However, most composites have been prepared using a small amount of graphene up to now, which extremely restricts the mechanical and electrical properties. Herein, a series of polymers (HEC, HPMC, and PVA)/graphene layered composites with high-content graphene (from 45 to 75%) are prepared by simple solution evaporation and then reduction method. The mechanical and electrical properties of these composites are studied. Mechanical results show with the increase of graphene oxide (GO) content, the tensile strength increases, and later decreases. Electrical performance indicates that the electrical conductivity of HPMC/rGO is greater than both HEC/rGO and PVA/rGO. Considering mechanical and electrical performance, HPMC/ rGO-65 with 65% graphene content is better than others, and its tensile strength and the conductivity are 32.08 MPa and 0.63 S/m, respectively. This work provides a new strategy for developing biomimetic nacre-like composites with high graphene content, which could improve the comprehensive properties of polymer/graphene.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Introduction Natural nacre possesses excellent mechanical properties due to the micro/nanoscale layered structure formed by 95 vol.% aragonite calcium carbonate platelets and 5 vol.% organic biopolymers [1, 2]. Being inspired by this unique micro/nanoscale
Handling Editor: Naiqin Zhao.
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https://doi.org/10.1007/s10853-020-05233-x
layered inorganic–organic structure, numerous researches have been developed on artificial nacrelike composites with remarkable mechanical properties [2–5]. In this layered system, two-dimensional inorganic materials like nanoclay [6–8], alumina platelet [9, 10], and graphene [11, 12], as the bricks’ role, are bonded by organic materials as mortar to achieve the stable structure and significant mechanical
J Mater Sci
properties. Among them, graphene composed by monolayer carbon atoms [13], which has remarkable properties including excellent mechanical property [14], outstanding thermal conductivity [15], and prominent electrical conductivity [16], has been as an ideal ‘‘bricks’’ for fabricating various types of multifunctional layer-by-layer composite materials. In the past several years, fruitful works of polymer/graphene nanocomposites have been reported [11, 13, 17–21]. However, owing to the aggregation problem and weak interaction with polymers, graphene is commonly used as a nanofiller within 10 wt.% content to improve the me
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