中国塑料 ›› 2022, Vol. 36 ›› Issue (5): 19-23.DOI: 10.19491/j.issn.1001-9278.2022.05.004

• 材料与性能 • 上一篇    下一篇

PE⁃UHMW/海泡石纤维复合材料的力学性能与摩擦学性能研究

王轲, 龙春光()   

  1. 长沙理工大学汽车与机械工程学院,长沙 410004
  • 收稿日期:2022-01-19 出版日期:2022-05-26 发布日期:2022-05-26
  • 通讯作者: 龙春光(1965—),男,教授,从事先进耐磨复合材料的设计、制造与应用研究, 642426853@qq.com
    E-mail:642426853@qq.com
  • 基金资助:
    国家科技部国际合作专项基金(0102013DFG52800);湖南省自然科学基金(2018JJ2426)

Mechanical and tribological properties of ultra⁃high molecular weight polyethylene/sepiolite fiber composites

WANG Ke, LONG Chunguang()   

  1. School of Automobile and Mechanical Engineering,Changsha University of Science and Technology,Changsha 410004,China
  • Received:2022-01-19 Online:2022-05-26 Published:2022-05-26
  • Contact: LONG Chunguang E-mail:642426853@qq.com

摘要:

采用硅烷偶联剂KH550对海泡石纤维(Sep)进行了改性,采用平板硫化机通过热压成型法制备了超高分子量聚乙烯(PE?UHMW)/Sep和PE?UHMW/改性海泡石纤维(O?Sep)复合材料,并通过红外光谱仪(FTIR)、电子万能试验机、扫描电子显微镜(SEM)等对Sep 及O?Sep的表面结构和复合材料的力学性能、摩擦学性能及磨痕形貌进行了表征和测试。结果表明,O?Sep表面存在KH550分子,其在复合材料中分布比Sep更为均匀;当O?Sep含量达到6 %(质量分数,下同)时,复合材料力学性能和摩擦学性能表现最佳,其拉伸强度、弯曲强度、弯曲模量和冲击强度分别为32.1 MPa,171.2 MPa、138.3 GPa和17.62 kJ/mm2,比纯PE?UHMW分别提高了41.4 %、40.0 %、95.6 %和36.9 %;其摩擦因数和磨损量分别为0.124和 0.1 mg,比纯PE?UHMW分别提高了77.1 %和80 %。

关键词: 超高分子量聚乙烯, 海泡石纤维, 复合材料, 力学性能, 摩擦学性能

Abstract:

Sepiolite fibers (Sep) were modified with a silane?coupling agent (KH550), and the ultra?high molecular weight polyethylene (PE?UHMW)/Sep and PE?UHMW/modified Sep (O?Sep) composites were prepared on a flat vulcanizer using a hot?pressing method. The surface structure of Sep and O?Sep and the mechanical and tribological properties of the composites were investigated using an infrared spectrometer, an electronic universal testing machine, and a scanning electron microscope. The results indicated that the KH550 molecules covered the surface of O?Sep, resulting in a uniform distribution of O?Sep in the composites. When the content of O?Sep fibers reached 6 wt%, the composites exhibited the optimal performance with tensile strength of 32.1 MPa, flexural strength of 171.2 MPa, flexural modulus of 138.3 GPa, and impact strength of 17.62 kJ/mm2, which were 41.4 %, 40.0 %, 95.6 %, and 36.9 % higher than those of pure PE?UHMW, respectively. The composites also revealed a friction factor of 0.124 and a wear amount of 0.1 mg, which were 77.1 % and 80 % higher than those of pure PE?UHMW, respectively.

Key words: ultra?high molecular weight polyethylene, sepiolite fiber, composite, mechanical property, tribological behavior

中图分类号: