Page 60 - 《摩擦学学报》2021年第4期

第 41 卷 第 4 期 摩 擦 学 学 报 Vol 41 No 4
2021 年 7 月 Tribology Jul, 2021

DOI: 10.16078/j.tribology.2020187

γ射线辐照聚四氟乙烯复合材料的结构和

摩擦磨损性能研究

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王 超 , 丛国辉 , 许雪飞 , 张翊勋 , 王廷梅 , 王学灵 , 王齐华 1
(1. 中国科学院兰州化学物理研究所 中国科学院材料磨损与防护重点实验室，甘肃 兰州 730000;
2. 中广核工程有限公司 核电安全监控技术与装备国家重点实验室，广东 深圳 518172)
摘 要: 通过γ射线辐照聚苯酯改性聚四氟乙烯(PTFE/POB)复合材料，利用红外光谱、X射线衍射、DSC等对辐照前
后材料的化学组成、结晶结构等进行了表征，并与γ射线辐照纯PTFE材料作对比，考察了热稳定性能、拉伸性能和摩
擦磨损性能. 结果表明：γ射线辐照并未造成PTFE/POB 材料的化学组成和热稳定性能的明显变化，但使得PTFE分
子量降低，结晶度增大；相比纯的PTFE材料，POB的加入一定程度上提高了PTFE的抗辐照能力，延缓了PTFE分子
量下降程度和再结晶化能力. 辐照对PTFE/POB材料的耐磨性能影响并不显著，但摩擦系数均有不同程度的降低，
且随着辐照剂量的增大，呈现先增大后减小的变化趋势，这与辐照后PTFE的分子量、结晶度及带晶尺寸变化，以及
POB自身的抗辐照能力等密切相关.
关键词: 聚四氟乙烯; γ射线辐照; 结晶度; 分子量; 摩擦磨损
中图分类号: TH117.3 文献标志码: A 文章编号: 1004-0595(2021)04–0503–09

Effect of Gamma Irradiation on Structure and Tribological
Properties of PTFE Composites

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WANG Chao , CONG Guohui , XU Xuefei , ZHANG Yixun , WANG Tingmei ,
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WANG Xueling , WANG Qihua 1
(1. Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of
Chemical Physics, Chinese Academy of Sciences, Gansu Lanzhou 730000, China
2. National Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment,
China Nuclear Power Engineering Co, Ltd, Guangdong Shenzhen 518172, China)
Abstract: In this paper, the tribological behavior of PTFE and its composites after gamma ray irradiation was studied.
The effects of irradiation on the chemical structure, heat resistance and tensile properties of the materials were mainly
investigated, so as to establish the correlation between the structure change and tribological properties of PTFE under
irradiation, and provide guidance for the design of PTFE sealing materials for nuclear power plants. Poly (phenylene
terephthalate) modified polytetrafluoroethylene (PTFE/POB) composites were irradiated by gamma-ray with dose of
1 000 Gy, 1 500 Gy, 2 200 Gy, and 3 000 Gy. The chemical composition and crystal structure of the materials before and

Received 3 September 2020, revised 22 February 2021, accepted 9 March 2021, available online 28 July 2021.
*Corresponding author. E-mail: wangtin3088@sina.com, Tel: +86-931-4968252.
The project was supported by the financial supports of Youth Innovation Promotion Association of Chinese Academy of Sciences
(2020417)， National Key Research and Development Project (2018YFB2000802)， CAS “ Light of West China” program and
National Natural Science Foundation of China-Aerospace Science and Technology Corporation of China Aerospace Advanced
Manufacturing Technology Research Joint Fund (U1737204).
中国科学院青年创新促进会资助项目(2020417)，国家重点研发计划项目(2018YFB2000802)，中国科学院西部之光项目和国家
自然科学基金航天先进制造项目(U1737204)资助.