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Issue 5, 2018
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Synergetic improvement of mechanical properties and surface activities in γ-irradiated carbon fibers revealed by radial positioning spectroscopy and mechanical model

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Abstract

The relationship between microstructures, surface activities, and mechanical properties of γ-irradiated carbon fibers has been evaluated quantitatively. X-ray photoelectron spectroscopy combined with argon ion sputtering indicated that the outer-surface part (∼10 nm) was functionalized and disordered by the grafting reaction; this led to an increase in the surface activity and loss of mechanical properties of γ-irradiated carbon fibers. The degree of covalent cross-linking between subsurface layers of graphene (∼1.5 μm) showed a more notable increase than that of the core (∼4 μm); this indicated that the sub-surface was mainly responsible for improvement in the tensile strength of γ-irradiated carbon fibers. Increases of 15.5% (argon) and 13.3% (epoxy chloropropane) in tensile strength were achieved. Moreover, interfacial shear strength of a single fiber in matrix increased by 19.15% (argon) and 75.03% (epoxy chloropropane). Therefore, this spatially resolved study paved a meaningful way to understand the relationship among microstructures, surface activities, and mechanical properties of γ-irradiated carbon fibers.

Graphical abstract: Synergetic improvement of mechanical properties and surface activities in γ-irradiated carbon fibers revealed by radial positioning spectroscopy and mechanical model

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Publication details

The article was received on 11 Dec 2017, accepted on 21 Dec 2017 and first published on 27 Dec 2017


Article type: Paper
DOI: 10.1039/C7AY02852K
Citation: Anal. Methods, 2018,10, 496-503
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    Synergetic improvement of mechanical properties and surface activities in γ-irradiated carbon fibers revealed by radial positioning spectroscopy and mechanical model

    M. Shan, H. Wang, Z. Xu, N. Li, C. Chen, J. Shi, L. Liu, L. Kuang, M. Ma and C. Zhang, Anal. Methods, 2018, 10, 496
    DOI: 10.1039/C7AY02852K

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