Synergetic improvement of mechanical properties and surface activities in γ-irradiated carbon fibers revealed by radial positioning spectroscopy and mechanical model†,Analytical Methods

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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†
Analytical Methods ( IF 2.7 ) Pub Date : 2017-12-27 00:00:00 , DOI: 10.1039/c7ay02852k
Mingjing Shan _{1,

2,

3,

4,

5} , Haibo Wang _{1,

2,

3,

4,

5} , Zhiwei Xu _{1,

2,

3,

4,

5} , Nan Li _{1,

2,

3,

4,

5} , Cheng Chen _{1,

2,

3,

4,

5} , Jie Shi _{1,

2,

3,

4,

5} , Liangsen Liu _{1,

2,

3,

4,

5} , Liyun Kuang _{1,

2,

3,

4,

5} , Meijun Ma _{1,

2,

3,

4,

5} , Ce Zhang _{1,

2,

3,

4,

5}

Affiliation

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.

中文翻译：

径向定位光谱法和力学模型表明，γ辐照碳纤维的机械性能和表面活性协同提高†

定量评估了γ辐照碳纤维的微观结构，表面活性和机械性能之间的关系。X射线光电子能谱结合氩离子溅射表明，外表面部分（〜10 nm）由于接枝反应而功能化和无序。这导致了表面活性的增加和γ辐照碳纤维的机械性能的损失。石墨烯次表面层之间的共价交联度（〜1.5μm）比芯层的共价交联度（〜4μm）更显着；这表明，次表面主要是提高γ-辐照碳纤维的拉伸强度的原因。拉伸强度增加了15.5％（氩气）和13.3％（环氧氯丙烷）。而且，基质中单根纤维的界面剪切强度增加了19.15％（氩气）和75.03％（环氧氯丙烷）。因此，这项空间分辨的研究为理解γ辐照碳纤维的微观结构，表面活性和机械性能之间的关系铺平了道路。

更新日期：2017-12-27

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