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采用离子液体和硅烷偶联剂对凹凸棒石纳米粉体进行表面功能化改性,进而制备了功能化改性凹凸棒石增强环氧树脂复合材料。利用TRM-1000销-盘摩擦磨损试验机,系统研究了干摩擦条件下不同功能化改性凹凸棒石增强环氧树脂材料与轴承钢共同作为摩擦对偶的摩擦学性能,结合摩擦表面的微观形貌表征和界面摩擦化学分析,阐释了其摩擦学机理。结果表明:表面功能化改性可显著抑制凹凸棒石的团聚、提高其在树脂基体中的分散以及与树脂基体的结合;填充质量分数为3%离子液体功能化改性凹凸棒石,环氧树脂复合材料的耐磨性显著提升,较纯环氧树脂提高了60%;在界面形成的铁氧化物和硅氧化物基转移膜,避免了摩擦副的直接接触并显著提高界面承载能力,是提高材料润滑性能和降低磨损的关键。
Abstract：Attapulgite(ATP) nano-powder was functionalized by ionic liquid(IL) and silane coupling agent, and then functional ATP reinforced epoxy(EP) composite was prepared. The tribological properties of the composite rubbing against GCr15 bearing steels were investigated under dry friction conditions in a model TRM-1000 pin-on-disc tribometer. The tribological mechanism was analyzed based on the characterization of interfacial microstructures and tribo-chemical reactions. The results show that the surface functionalization of ATP significantly restrains the agglomeration and promotes its uniform dispersion in the resin. Moreover, the maximum wear resistance is achieved by filling EP with functionalized ATP modified by IL(3%, in mass fraction). The wear resistance is enhanced by 60%, compared to neat EP. Iron oxide and silicon oxide-based tribofilm formed at the friction interface mitigated the direct contact of the friction pairs, thus improving the wear resistance of EP materials. It is indicated that ATP could be used as a promising friction functional mineral filler in wear-resistant polymer.
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基本信息:
DOI：10.14062/j.issn.0454-5648.20200747
中图分类号:TB332;TQ323.5
引用信息:
[1]王伟,张利刚,赵福燕,等.凹凸棒石增强环氧树脂的摩擦性能[J].硅酸盐学报,2021,49(06):1222-1229.DOI:10.14062/j.issn.0454-5648.20200747.
基金信息:
国家重点基础研究发展规划项目(2017YFB0310703); 山东省重点研发计划项目(2019CSF109094)
2020-09-30
2020
2021-04-13
2021-04-02
2021
1
2021-04-06
2021-04-06
2021-04-06