Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene

Rahim Jan; Amir Habib; Muhammad Aftab Akram; Tanveer-ul-Haq Zia; Ahmad Nawaz Khan

doi:10.1186/s11671-016-1595-2

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Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene

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Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene

Rahim Jan, Amir Habib, Muhammad Aftab Akram, Tanveer-ul-Haq Zia and Ahmad Nawaz Khan

Nanoscale research letters, Vol.11(1), pp.377-9

01/12/2016

DOI: https://doi.org/10.1186/s11671-016-1595-2

PMCID: PMC4996809

PMID: 27558496

Abstract

Graphene

Liquid phase exfoliation

Nano Express

Nanocomposites

Polymer grafting

Strain-induced exfoliation

Polyvinyl alcohol (PVA)-stabilized graphene nanosheets (GNS) of lateral dimension ( L ) ~1 μm are obtained via liquid phase exfoliation technique to prepare its composites in the PVA matrix. These composites show low levels of reinforcements due to poor alignment of GNS within the matrix as predicted by the modified Halpin-Tsai model. Drawing these composites up to 200 % strain, a significant improvement in mechanical properties is observed. Maximum values for Young’s modulus and strength are ~×4 and ~×2 higher respectively than that of neat PVA. Moreover, the rate of increase of the modulus with GNS volume fraction is up to 700 GPa, higher than the values predicted using the Halpin-Tsai theory. However, alignment along with strain-induced de-aggregation of GNS within composites accounts well for the obtained results as confirmed by X-ray diffraction (XRD) characterization.

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Title: Uniaxial Drawing of Graphene-PVA Nanocomposites: Improvement in Mechanical Characteristics via Strain-Induced Exfoliation of Graphene
Creators - without role: Rahim Jan - National University of Sciences and Technology
Amir Habib - National University of Sciences and Technology
Muhammad Aftab Akram - National University of Sciences and Technology
Tanveer-ul-Haq Zia - School of Chemical and Materials Engineering, National University of Sciences and Technology, H-12 Campus, Islamabad, Pakistan
Ahmad Nawaz Khan - National University of Sciences and Technology
Publication Details: Nanoscale research letters, Vol.11(1), pp.377-9
Publisher: Springer US
Identifiers: 9914420408331
Academic Unit: Hafr Albatin University
Language: English
Resource Type: Journal article