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Retraction published on 23 April 2019, see Materials 2019, 12(8), 1316.
Open AccessArticle

Epoxy Resins Toughened with Surface Modified Epoxidized Natural Rubber Fibers by One-Step Electrospinning

by Joo Ran Kim 1 and Jung J. Kim 2,*
1
Fiber Science, Cornell University, Ithaca, NY 14853, USA
2
Department of Civil Engineering, Kyungnam University, Changwon-si 51767, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Nicole Zander
Materials 2017, 10(5), 464; https://doi.org/10.3390/ma10050464
Received: 4 April 2017 / Revised: 23 April 2017 / Accepted: 25 April 2017 / Published: 27 April 2017
(This article belongs to the Section Advanced Composites)
Epoxidized natural rubber fibers (ERFs) are developed through one-step electrospinning and directly deposited into epoxy resins without collecting and distributing of fibers. The shape of ERFs shows rough surface due to different evaporation rate of solvent mixture consisting of chloroform and dichloromethane and the average diameter of ERFs is 6.2 µm. The increase of ERFs loading from 0 to 20 wt % into the epoxy resin increases the fracture strain significantly from 1.2% to 13% and toughness from 0.3 MPa to 1.9 MPa by a factor of 7. However, the tensile strength and Young’s modulus decrease about 34% from 58 MPa to 34 MPa and from 1.4 GPa to 0.9 GPa, respectively. Due to the crosslinking reactions between oxirane groups of ERFs and amine groups in the resin, surface roughness and the high aspect ratio of ERFs, ERFs result in more effective toughening effect with the minimum loss of tensile properties in epoxy resins. View Full-Text
Keywords: natural rubber fibers; epoxy resin; toughening; surface modification natural rubber fibers; epoxy resin; toughening; surface modification
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Kim, J.R.; Kim, J.J. Epoxy Resins Toughened with Surface Modified Epoxidized Natural Rubber Fibers by One-Step Electrospinning. Materials 2017, 10, 464.

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