Shear exfoliation synthesis of large-scale graphene-reinforced nanofibers

Joyner, J and Javvaji, B and Owuor, PS and Raghavan, P and Salpekar, D and Tsafack, T and Bhowmick, S and Vajtai, R and Mahapatra, DR and Tiwary, CS and Ajayan, PM (2020) Shear exfoliation synthesis of large-scale graphene-reinforced nanofibers. In: Carbon, 166 . pp. 405-413.

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Abstract

Liquid phase exfoliation of two-dimensional (2D) materials from their bulk counterparts has attracted a lot of attention due to its applications in the large-scale synthesis of these materials. Herein, detailed molecular dynamics simulations to understand the exfoliation process of graphene followed by an in-situ exfoliation experiment of graphite suspended in polyacrylonitrile (PAN) using a well-known electro-spinning technique were performed. Submicron-scale fibers reinforced with graphene exhibited multi-fold improvements in terms of mechanical (stiffness, elastic modulus), thermal (degradation temperature) and electrochemical (ionic conductivity) properties. This method is a unique way of synthesizing in-situ composites with large lengths and submicron-diameter fibers. The present technique and the key ideas can be readily extended to other 2D materials as well. © 2020 Elsevier Ltd

Item Type:	Journal Article
Publication:	Carbon
Publisher:	Elsevier Ltd
Additional Information:	Copy right for this article belongs to Elsevier Ltd raju
Keywords:	Graphene; Molecular dynamics; Reinforced plastics; Reinforcement; Spinning (fibers), Degradation temperatures; Exfoliation process; In-situ composite; Large scale synthesis; Molecular dynamics simulations; Polyacrylonitrile (PAN); Submicron diameters; Two Dimensional (2 D), Exfoliation (materials science)
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	01 Oct 2020 10:43
Last Modified:	01 Oct 2020 10:43
URI:	http://eprints.iisc.ac.in/id/eprint/65842

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