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Epoxy nanocomposites simultaneously strengthened and toughened by hybridization with graphene oxide and block ionomer

Version 2 2024-06-06, 00:30
Version 1 2018-10-26, 11:12
journal contribution
posted on 2024-06-06, 00:30 authored by Zhiguang Xu, Pingan Song, J Zhang, Qipeng Guo, Yiu-Wing Mai
Epoxies are widely used in many engineering applications, however, their fracture energy remains less than desired and conventional toughening agents usually lead to compromised tensile strength. In this study, a simple one-pot blending method was used, in which both graphene oxide and a block ionomer were blended with epoxy resin. Herein, we reported that increases of ∼200% in fracture energy (GIC), 48% in uniaxial tensile strength (σt) and 340% in tensile strain could be achieved by incorporating 1.0 wt% graphene oxide into an epoxy matrix with 20 wt% sulfonated polystyrene-block-poly(ethylene-co-butylene)-block-polystyrene (SSEBS). In addition, the glass transition temperature (Tg) of the nanocomposite increased with increasing graphene oxide (GO) content and the storage modulus (E′) decreased when the GO content was less than 0.50 wt% owing to the introduction of the block ionomer SSEBS. Careful examination of the nano-morphology of SSEBS revealed that it improved the dispersion of the graphene oxide in and enhanced its interaction with the epoxy matrix, hence simultaneously strengthening and toughening the epoxy resin.

History

Journal

Composites science and technology

Volume

168

Pagination

363-370

Location

Amsterdam, The Netherlands

ISSN

0266-3538

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2018, Elsevier Ltd.

Publisher

Elsevier