Toughening of epoxies by covalently anchoring triazole-functionalized stacked-cup carbon nanofibers

Wanshuang Liu; Junhua Kong; Weilong Eric Toh; Rui Zhou; Guoqiang Ding; Shu Huang; Yuliang Dong; Xuehong Lu

doi:10.1016/j.compscitech.2013.05.009

Toughening of epoxies by covalently anchoring triazole-functionalized stacked-cup carbon nanofibers

Wanshuang Liu, Junhua Kong, Weilong Eric Toh, Rui Zhou, Guoqiang Ding, Shu Huang, Yuliang Dong, Xuehong Lu^*

^*Corresponding author for this work

Nanyang Technological University

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

Novel triazole-functionalized carbon nanofibers (m-CNFs) were prepared by one-step arylation with diazonium salts generated in situ. Microscopic observations indicate that m-CNFs exhibit significantly improved dispersibility in a high-performance epoxy resin compared with pristine CNFs (p-CNFs). The results of DSC and SEM show evidence of interfacial reaction and a more robust interface between m-CNFs and the epoxy matrix. Thermal and mechanical properties of two CNF/epoxy composites were systematically studied at different filler loadings. The results show that both CNF fillers could reinforce the epoxy matrix without sacrificing their thermal properties. Benefiting from the improved dispersibility and interfacial interaction, the ability of m-CNFs in toughening the epoxy resin is clearly superior to p-CNFs. The addition of only 0.4wt% m-CNFs gives 41% and 80% enhancement in critical stress intensity factor (K_IC) and the critical strain energy release rate (G_IC), respectively.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Composites Science and Technology
Volume	85
DOIs	https://doi.org/10.1016/j.compscitech.2013.05.009
Publication status	Published - Aug 1 2013
Externally published	Yes

ASJC Scopus Subject Areas

Ceramics and Composites
General Engineering

Keywords

A. Polymer-matrix composites (PMCs)
B. Fracture toughness
B. Interface
B. Thermomechanical properties
Carbon nanofibers

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10.1016/j.compscitech.2013.05.009

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title = "Toughening of epoxies by covalently anchoring triazole-functionalized stacked-cup carbon nanofibers",

abstract = "Novel triazole-functionalized carbon nanofibers (m-CNFs) were prepared by one-step arylation with diazonium salts generated in situ. Microscopic observations indicate that m-CNFs exhibit significantly improved dispersibility in a high-performance epoxy resin compared with pristine CNFs (p-CNFs). The results of DSC and SEM show evidence of interfacial reaction and a more robust interface between m-CNFs and the epoxy matrix. Thermal and mechanical properties of two CNF/epoxy composites were systematically studied at different filler loadings. The results show that both CNF fillers could reinforce the epoxy matrix without sacrificing their thermal properties. Benefiting from the improved dispersibility and interfacial interaction, the ability of m-CNFs in toughening the epoxy resin is clearly superior to p-CNFs. The addition of only 0.4wt% m-CNFs gives 41% and 80% enhancement in critical stress intensity factor (KIC) and the critical strain energy release rate (GIC), respectively.",

keywords = "A. Polymer-matrix composites (PMCs), B. Fracture toughness, B. Interface, B. Thermomechanical properties, Carbon nanofibers",

author = "Wanshuang Liu and Junhua Kong and Toh, {Weilong Eric} and Rui Zhou and Guoqiang Ding and Shu Huang and Yuliang Dong and Xuehong Lu",

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doi = "10.1016/j.compscitech.2013.05.009",

language = "English",

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AU - Liu, Wanshuang

AU - Kong, Junhua

AU - Toh, Weilong Eric

AU - Zhou, Rui

AU - Ding, Guoqiang

AU - Huang, Shu

AU - Dong, Yuliang

AU - Lu, Xuehong

PY - 2013/8/1

Y1 - 2013/8/1

N2 - Novel triazole-functionalized carbon nanofibers (m-CNFs) were prepared by one-step arylation with diazonium salts generated in situ. Microscopic observations indicate that m-CNFs exhibit significantly improved dispersibility in a high-performance epoxy resin compared with pristine CNFs (p-CNFs). The results of DSC and SEM show evidence of interfacial reaction and a more robust interface between m-CNFs and the epoxy matrix. Thermal and mechanical properties of two CNF/epoxy composites were systematically studied at different filler loadings. The results show that both CNF fillers could reinforce the epoxy matrix without sacrificing their thermal properties. Benefiting from the improved dispersibility and interfacial interaction, the ability of m-CNFs in toughening the epoxy resin is clearly superior to p-CNFs. The addition of only 0.4wt% m-CNFs gives 41% and 80% enhancement in critical stress intensity factor (KIC) and the critical strain energy release rate (GIC), respectively.

AB - Novel triazole-functionalized carbon nanofibers (m-CNFs) were prepared by one-step arylation with diazonium salts generated in situ. Microscopic observations indicate that m-CNFs exhibit significantly improved dispersibility in a high-performance epoxy resin compared with pristine CNFs (p-CNFs). The results of DSC and SEM show evidence of interfacial reaction and a more robust interface between m-CNFs and the epoxy matrix. Thermal and mechanical properties of two CNF/epoxy composites were systematically studied at different filler loadings. The results show that both CNF fillers could reinforce the epoxy matrix without sacrificing their thermal properties. Benefiting from the improved dispersibility and interfacial interaction, the ability of m-CNFs in toughening the epoxy resin is clearly superior to p-CNFs. The addition of only 0.4wt% m-CNFs gives 41% and 80% enhancement in critical stress intensity factor (KIC) and the critical strain energy release rate (GIC), respectively.

KW - A. Polymer-matrix composites (PMCs)

KW - B. Fracture toughness

KW - B. Interface

KW - B. Thermomechanical properties

KW - Carbon nanofibers

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Toughening of epoxies by covalently anchoring triazole-functionalized stacked-cup carbon nanofibers

Abstract

ASJC Scopus Subject Areas

Keywords

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