低浓度氧化石墨烯改性环氧树脂基碳纤维层合板的拉伸性能

吴明宇; 闫晓鹏; 郭章新; 崔俊杰

doi:10.11858/gywlxb.20200541

低浓度氧化石墨烯改性环氧树脂基碳纤维层合板的拉伸性能

doi: 10.11858/gywlxb.20200541

吴明宇^{1, 2, 3,},
闫晓鹏^{1, 2, 3,*, ,},
郭章新^{1, 2, 4,*, ,},
崔俊杰^{1, 3, 4}

1.
太原理工大学机械与运载工程学院，山西太原　030024
2.
太原理工大学材料强度与结构冲击山西省重点实验室，山西太原　030024
3.
力学国家级实验教学示范中心（太原理工大学），山西太原　030024
4.
西安交通大学航天学院机械结构强度与振动国家重点实验室，陕西西安　710049

基金项目: 国家自然科学基金（11602160）；山西省高等学校科技创新项目（2017117）；西安交通大学机械结构强度与振动国家重点实验室开放课题（SV2019-KF-01）；山西省“1331工程”重点创新团队项目

详细信息

作者简介:
吴明宇（1992－），男，硕士研究生，主要从事复合材料的力学性能研究. E-mail：ming.yu.wu@qq.com

通讯作者:
闫晓鹏（1976－），男，博士，副教授，主要从事塑性动力学研究. E-mail：yan.xiaopeng@qq.com

郭章新（1983－），男，博士，副教授，主要从事复合材料及其结构的力学性能研究. E-mail：woxintanran215@163.com

中图分类号: O341
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出版历程
- 收稿日期: 2020-04-09
- 修回日期: 2020-04-20
- 刊出日期: 2020-10-25

Tensile Properties of Low Concentration Graphene Oxide Modified Epoxy Resin-Based Carbon Fiber Laminate

WU Mingyu^{1, 2, 3
,},
YAN Xiaopeng^{1, 2, 3,*
, ,},
GUO Zhangxin^{1, 2, 4,*
, ,},
CUI Junjie^{1, 3, 4}

1.
College of Mechanical and Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
2.
Shanxi Key Laboratory of Material Strength & Structural Impact, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
3.
National Demonstration Center for Experimental Mechanics Education (Taiyuan University of Technology), Taiyuan 030024, Shanxi, China
4.
State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

摘要

摘要: 将氧化石墨烯（GO）均匀分散到环氧树脂（EP）中，采用真空辅助树脂传递模塑成型的工艺方法制备增强碳纤维（CF）复合材料，研究常温下不同浓度（质量分数为0、0.03%、0.07%和0.10%）GO改性EP/CF层合板的抗拉性能和微观胶联性能，探究低浓度GO对CF增强复合材料力学性能明显改善的阈值。实验结果表明：GO对CF增强环氧复合材料的性能有明显改善作用，与纯环氧基CF层合板相比，随着GO浓度增加，其抗拉性能随之增强；GO官能团可以提高EP基体与CF的结合程度，通过扫描电镜观察到加入GO的层合板中CF与EP的黏结更加紧密，使得啮合效果更强，从而提高了复合材料层合板的拉伸强度；低浓度GO改性下，当GO的质量分数达到0.07%时，层合板的力学性能得到明显改善。
- 氧化石墨烯 /
- 碳纤维 /
- 拉伸实验 /
- 力学性能
Abstract: Graphene oxide (GO) was evenly dispersed in epoxy resin, and vacuum-assisted resin transfer molding was used to prepare reinforced carbon fiber composite materials. Different concentrations (0, 0.03%, 0.07% and 0.10%) were studied tensile properties and micro-adhesive properties of graphene oxide (GO) modified epoxy resin/carbon fiber (EP/CF) laminate at room temperature, explored the threshold for significant improvement of mechanical properties of carbon fiber reinforced composites by low concentration GO. The experimental results show that graphene oxide (GO) has a certain improvement effect on the performance of carbon fiber reinforced epoxy composites. Compared with pure epoxy-based carbon fiber laminates, as the concentration of GO increases, its tensile properties will also increase; GO contained functional groups can improve the degree of bonding between the epoxy-based system and the carbon fiber. Through scanning electron microscopy (SEM), it can be observed that the adhesion of the carbon fiber and the epoxy resin in the GO-laminated board is closer, which makes the meshing effect stronger and improves the tensile strength of composite laminates; mechanical properties of laminates begin to be significantly improved when their content reaches 0.07% when modified by low-concentration GO.
- graphene oxide /
- carbon fiber /
- tensile test /
- mechanical properties

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图 1 层合板制作流程

Figure 1. Schematic illustration of laminate manufacturing process

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图 2 4种GO浓度试件的断裂伸长率

Figure 2. Elongation at break of specimens withfour GO concentrations

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图 3 4种试件的应力-应变曲线

Figure 3. Stress-strain curves of 4 specimens

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图 4 试件断裂时的最大载荷

Figure 4. Maximum load on specimens fracture

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图 5 层合板断裂面纤维束SEM图像

Figure 5. SEM images of cross-section fiber bundle of laminates

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图 6 单根断裂纤维SEM图像

Figure 6. SEM images of single fractured fiber

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图 7 基体剥离侧面SEM图像

Figure 7. Edge morphology peeling SEM images

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