生物启发的防磨聚胺复合材料:对聚合物晶体结构的tribology的影响
Chaoying Liao1,2,3, Zhaozhu Zhang1,3, Yaohui He1,3
1State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Small (Weinheim an der Bergstrasse, Germany)
|January 9, 2025
概括
一种新的聚氨基胺树脂 (PURI) 复合物,灵感来自龙的翅膀,显示出出色的 Tribological 特性. 在PEEK和PTFE纤维中,摩擦诱导的结晶和 tribochemical 反应提高了高速耐磨性.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 部落学 (tribology) 是一个学科.
背景情况:
- 聚合物复合材料面临的挑战是,在高速旋转速度下保持三元学性能.
- 龙翅膀的微观结构为先进的材料设计提供了灵感.
- 开发高性能聚合物的环保合成路径至关重要.
研究的目的:
- 开发一种新的,热稳定的,环境压力固化聚胺 (PURI) 树脂,具有卓越的 Tribological 特性.
- 为了研究用聚乙 (PEEK) 和聚四乙烯 (PTFE) 混合织物增强的PURI复合材料的三元学行为.
- 阐明底层摩擦机制,包括摩擦诱导的结晶和 tribochemical 反应.
主要方法:
- 环保合成PURI树脂使用生物基绿色溶剂,如二甲基异索化物 (DMI).
- 制造PURI复合材料,其中包括PEEK和PTFE混合织物.
- 在高速旋转速度 (800r分钟-1) 进行的tribological测试,以测量摩擦系数和磨损率.
- 使用像X射线衍射 (XRD) 和光谱学这样的技术,分析摩擦期间的材料结构和化学变化.
主要成果:
- 普里复合材料表现出出色的机械性能,其抗拉强度超过175MPa.
- 普里/PEEK/PTFE复合材料的平均摩擦系数低至0.1160,平均磨损率为2.7 × 10−14 m3 (N·m) −1.1.
- 确定了PURI树脂的摩擦诱导结晶和PTFE纤维的 tribochemical 反应是促进增强 tribological 性能的关键机制.
- 观察到保护性 tribofilm 的形成,减少了磨损.
结论:
- 使用绿色溶剂合成的新型PURI树脂,为高速 tribological 应用提供了一个有前途的解决方案.
- PURI,PEEK和PTFE的协同效应,再加上摩擦诱导的结晶和 tribochemical 反应,导致了异常的耐磨性.
- 这项研究为聚合物复合材料的摩擦机制提供了宝贵的见解,有助于设计先进的耐磨材料.
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