Tribological behavior and characterization analysis of modified nano-CeO2 filled oily diatomite/PVDF composites

Tribological behavior and characterization analysis of modified nano-CeO2 filled oily diatomite/PVDF composites
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改性纳米CeO2填充油性硅藻土/PVDF复合材料的摩擦学行为及表征分析

DOI:
10.1016/j.triboint.2018.10.007
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发表时间:
2019-02
影响因子:
6.2
通讯作者:
Zhu Yanji
Zhu Yanji
中科院分区:
工程技术1区
文献类型:
--
作者:
Su Chang;Wang Huaiyuan;Li Meiling;Qu Yongquan;Zhu Yanji

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采用化学改性和熔融共混的方法,在改性硅藻土(M-DE)中注入两种不同形貌的改性纳米CeO2(MN-CeO2)润滑油,考察了不同形态的MN-CeO2/30 质量分数油性硅藻土(O-DE)/聚偏氟乙烯(PVDF)复合材料的摩擦学性能和硬度。与O-DE/PVDF复合材料相比,质量分数为0.5wt%的改性多孔棒纳米 /O-DE/PVDF复合材料的摩擦系数和磨损率分别降低了30.4%和82.3%。耐磨性的提高主要是由于MN-CeO2和润滑油储存在O-DE的多孔结构中,而MN-CeO2直接混入PVDF中可以提高复合材料的结晶度和肖氏硬度。此外,还揭示了相关的仿生自润滑机理和结晶行为。
By chemical modification and melt blending, lubricating oil containing two different morphologies of modified nano-CeO2(MN-CeO2) was injected into modified diatomite (M-DE) to investigate diverse impacts on the tribological properties and hardness of MN-CeO2/30 wt% oily diatomite (O-DE)/polyvinylidene fluoride (PVDF) composites. Compared with the O-DE/PVDF composites, the friction coefficient and wear rate of 0.5 wt% modified porous rod nano-CeO2(MPRN)/O-DE/PVDF composites were reduced by 30.4% and 82.3%, respectively. The enhanced wear resistance was principally attributed to MN-CeO2and lubricating oil stored in the porous structure of O-DE, while the MN-CeO2directly blended in PVDF matrix could improve the crystallinity and shore hardness of the composites. Furthermore, the relevant bionic self-lubricating mechanisms and crystallization behaviors were also revealed in the paper.
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