玻璃纤维改性UHMWPE的热膨胀和摩擦学性能
DOI:
作者:
作者单位:

1.武汉材料保护研究所 湖北武汉;2.特种表面保护材料及应用技术国家重点实验室

作者简介:

通讯作者:

中图分类号:

基金项目:


Thermal expansion and tribological properties of glass fiber modified UHMWPE
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为了降低聚合物摩擦副材料的热膨胀系数,拓展其在宽温域范围内的应用,用未处理和经硅烷偶联剂KH570改性处理后的玻璃纤维(GF)对超高分子量聚乙烯(UHMWPE)改性,采用热压成型工艺制备GF/UHMWPE复合材料。通过傅里叶红外表征了两种填料的微观结构差异;用差示扫描量热仪(DSC)测试分析了复合材料的熔点和结晶度;借助热膨胀仪(DIL)测定了复合材料的热膨胀率和热膨胀系数,并在干摩擦环境下,研究了不同含量复合材料的摩擦学性能。结果表明,经过KH570改性处理后的GF形成了稳定的Si-O-Si结构,改善了与UHMWPE基体的粘结性。GF由于本身较低的热膨胀系数,并且能与高分子链形成较强的作用力,可以有效改善UHMWPE的热膨胀性能,GF/UHMWPE复合材料的摩擦系数随着填料含量的增加而先下降后上升,磨损量随填料含量的增加而增大,在相同填料添加量时,经过KH570改性处理GF复合材料的界面结合力更好,综合性能要优于未处理GF复合材料。

    Abstract:

    In order to reduce the thermal expansion coefficient of polymeric friction pair materials and expand their applications in a wide temperature range, GF/UHMWPE composites were prepared by hot pressing with untreated and silane coupling agent KH570-modified glass fibers (GF) modified with ultra-high molecular weight polyethylene (UHMWPE). The microstructural differences between the two fillers were characterized by FTIR; the melting point and crystallinity of the composites were analyzed by differential scanning calorimeter (DSC); the thermal expansion rate and thermal expansion coefficient of the composites were determined with the help of thermal expansion meter (DIL), and the tribological properties of the composites with different contents were investigated under dry friction environment. The results showed that the GF modified by KH570 formed a stable Si-O-Si structure, which improved the bonding with the UHMWPE matrix; GF can effectively improve the thermal expansion performance of UHMWPE due to its low thermal expansion coefficient and its ability to form a strong force with polymer chains; the friction coefficient of GF/UHMWPE composites decreased and then increased with the filler content, and the wear coefficient increased with the increase of the filler content. The friction coefficient of GF/UHMWPE composite decreases and then increases with the increase of filler content, and the wear increases with the increase of filler content.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-11-23
  • 最后修改日期:2022-02-09
  • 录用日期:2022-03-27
  • 在线发布日期:
  • 出版日期:
您是第位访问者
编辑出版:《高分子材料科学与工程》编辑部
地址:四川省成都市一环路南一段24号 四川大学高分子研究所
电话:028-8540 1653  E-mail:gfzclbjb@163.net; gfzclbjb@vip.sina.com
高分子材料科学与工程 ® 2022 版权所有
技术支持:北京勤云科技发展有限公司