PA6／纳米A12O3复合材料摩擦性能的研究

研究了纳米Al2O3填充PA6复合材料的摩擦性能。通过分析纳米Al2O3含量、载荷对材料摩擦系数和耐磨性能的影响，得到复合材料中纳米Al2O3为6wt％时，材料的摩擦性能最好。通过SEM图片分析试件摩擦表面形貌，发现复合材料的磨损机理从纯PA6材料的粘着磨损转为轻微的磨粒磨损和粘着磨损。     

PA6/纳米Al_2O_3复合材料摩擦性能的研究

研究了纳米Al2 O3 填充PA6复合材料的摩擦性能。通过分析纳米Al2 O3 含量、载荷对材料摩擦系数和耐磨性能的影响,得到复合材料中纳米Al2 O3 为 6wt%时,材料的摩擦性能最好。通过SEM图片分析试件摩擦表面形貌,发现复合材料的磨损机理从纯PA6材料的粘着磨损转为轻微的磨粒磨损和粘着磨损     

尼龙6/纳米A12O3复合材料与铜摩擦副的摩擦磨损性能

采用双螺杆挤出机共混制备尼龙6／纳米Al2O3复合材料,考察了复合材料的硬度及与铜摩擦副的摩擦磨损性能。试验表明,加入纳米Al2O3可使尼龙6的硬度提高。在低载荷时,复合材料的摩擦系数随载荷的增加而减小;当载荷超过一定值后,摩擦系数增大;载荷一定时,摩擦系数随纳米A120,含量的增加呈上升趋势。当纳米Al2O3含量达到10份时,复合材料的磨损量较小;当纳米Al2O3超过10份时,纳米Al2O3粒子的团聚会造成其与基体尼龙6的结合力降低,最终导致尼龙6／纳米Al2O3复合材料磨损量增大。     

电梯工况下纳米Al2O3对PA6耐磨损性能的影响

以聚酰胺6(PA6)为电梯靴衬材料,制备了PA6/纳米Al2O3复合材料。在电梯工况下研究纳米Al2O3含量对复合材料磨损性能的影响,并探讨纳米Al2O3对PA6的作用机理。结果表明,在电梯工况下随着试验时间的延长,PA6/纳米Al2O3复合材料摩擦因数经历了先急剧增大后迅速减小再平缓的变化过程;随着纳米Al2O3含量的增加,复合材料的摩擦因数和磨损量表现为先减小后增加的变化;当纳米Al2O3含量为4%时,其减摩耐磨效果最为显著,对应的摩擦因数和磨损量分别比纯PA6降低23.5%和84.3%;复合材料的磨损行为与纳米Al2O3含量有关,纯PA6磨损形式主要是磨粒磨损和黏着磨损并存,随着纳米Al2O3含量的增加,复合材料经历了磨粒磨损先增强后减弱和黏着磨损先减弱后增强的变化过程。     

PTFE/Al2O3纳米复合材料的摩擦磨损性能研究

利用MM—200型摩擦磨损试验机研究了PTFE／Al2O3纳米复合材料的摩擦磨损性能，并采用扫描电子显微镜观察、分析了试样磨屑形状及磨损机理。结果表明，经表面处理的纳米Al2O3能明显提高PTFE的耐磨损性并改变其磨屑形成机理；当表面处理纳米Al2O3含量为3％时，PTFE纳米复合材料的磨损量最小，但在试验范围内，表面处理纳米Al2O3含量变化对PTFE纳米复合材料的耐磨损性影响不大，而PTFE纳米复合材料的摩擦系数则随表面处理纳米Al2O3含量增加而略有增大，导致PTFE磨损的机理主要是粘着磨损。     

接枝改性纳米氧化铝填充PTFE复合材料摩擦学性能研究

合成了含氟分子链接枝改性纳米氧化铝(Al2O3),用接枝改性纳米Al2O3填充聚四氟乙烯(PTFE),采用模压成型法制备了不同接枝改性纳米Al2O3含量的PTFE/纳米Al2O3复合材料;在摩擦磨损试验机上考察了接枝改性纳米Al2O3对PTFE/纳米Al2O3复合材料摩擦学性能的影响,利用扫描电子显微镜对复合材料的磨损表面进行了微观分析。结果表明,接枝改性纳米Al2O3填充PTFE复合材料在保持PTFE低摩擦系数的同时,提高了其耐磨损性能。     

碳纤维增强尼龙复合材料的摩察性能研究

根据碱催化阴离子聚合原理，制备了连续长碳纤维增强单体浇铸尼龙复合材料（简称CL/PA）。在MM-200型磨损试验机上考察了碳纤维含量和试验条件对其摩擦性能的影响，并利用扫描电子显微镜对其摩擦性能和磨损机制进行了考察。分析结果表明：碳纤维的体积分数在35%左右时增强效果最好，CL/PA复合材料的摩擦系数和磨损率随着载荷的增加而减小。其磨损机制主要表现为粘着磨损和碳纤维的破碎和磨平的特征。     

碳纤维增强尼龙复合材料的摩擦性能研究

根据碱催化阴离子聚合原理 ,制备了连续长碳纤维增强单体浇铸尼龙复合材料 (简称CL/PA)。在MM -2 0 0型磨损试验机上考察了碳纤维含量和试验条件对其摩擦性能的影响 ,并利用扫描电子显微镜对其摩擦性能和磨损机制进行了考察。分析结果表明 :碳纤维的体积分数在 35 %左右时增强效果最好 ,CL/PA复合材料的摩擦系数和磨损率随着载荷的增加而减小。其磨损机制主要表现为粘着磨损和碳纤维的破碎和磨平的特征     

表面处理Al2O3增强PTFE基复合材料的摩擦学性能

利用MM-200型摩擦磨损试验机考察了表面处理与未处理纳米Al2O3对填充聚四氟乙烯(PTFE)复合材料摩擦学性能的影响，采用扫描电子显微镜观察试样混合效果和磨损表面形貌并分析其磨损机理。结果表明：填充PTFE摩擦系数比PTFE略有增加。纳米Al2O3可以提高PTFE耐磨性，表面处理纳米Al2O3在PTFE中能较均匀分散，其耐磨性比相同含量但未经表面处理的纳米Al2O3填充PTFE高一倍。导致PTFE磨损的重要机理是切削和粘着磨损。     

纳米Al_2O_3填充超高分子量聚乙烯的生物摩擦磨损性能研究

用纳米Al2O3对人工关节软骨UHMWPE进行填充改性,在生理盐水润滑条件下,评价了其摩擦磨损性能。结果表明,纳米Al2O3的加入,在一定程度上提高了UHMWPE的硬度,与钛合金对磨时的摩擦系数随Al2O3含量(<10%)的增加而增加;与不锈钢对磨时,摩擦系数有所增加;不同Al2O3含量(<10%)的UHMWPE,磨损率比纯UHMWPE低。纯UHMWPE的磨损表现为明显的犁沟以及塑性变形,加入纳米Al2O3的UHMWPE的磨损主要表现为磨粒磨损和轻微的塑性变形。     

水润滑下纳米三氧化二铝/端异氰酸酯基聚丁二烯液体橡胶-环氧树脂复合材料的摩擦性能

研究了纳米Al2O3/端异氰酸酯基聚丁二烯液体橡胶-环氧树脂(ETPB)复合材料在水润滑条件下的摩擦性能,并用扫描电子显微镜表征了复合材料的磨损表面形貌,探讨了磨损机理。结果表明,在水润滑条件下,纳米Al2O3/ETPB复合材料的磨损率和摩擦系数低于ETPB;载荷和滑动速率的变化对纳米Al2O3/ETPB复合材料的磨损率、摩擦系数及磨损表面形貌影响不大,复合材料的磨损表面均未产生裂纹;ETPB的磨损机理为疲劳磨损,纳米AlO/ETPB复合材料的磨损机理为机械抛光磨损。     

The Effect of Maleic Anhydride Grafted Styrene-Ethylene-Butylene-Styrene on the Friction and Wear Properties of Polyamide6/Carbon Nanotube Composites

The friction and wear properties of polyamide6 (PA6), polyamide6/carbon nanotube (PA6/CNT) nanocomposites and PA6/maleic anhydride grafted Styrene-ethylene-butylene-styrene (SEBS-g-MA+CNT) nanocomposites was studied by means of a ring-on-block tribometer. The morphologies of the worn surfaces of specimens were observed with a scanning electron microscopy (SEM). All specimen wear increases with increasing load; meanwhile, the friction coefficient decreases. Wear of PA6/CNT is larger than that of PA6. Adding SEBS-g-MA to the PA6/CNT improves the wear resistance. The friction coefficient of PA6/CNT is slightly less than that of PA6 at various loads. The friction coefficient of PA6/(SEBS-g-MA+CNT) is the lowest among PA6, PA6/CNT and PA6/(SEBS-g-MA+CNT).     

干滑动下端羟基聚丁二烯液体橡胶-环氧树脂复合材料的摩擦性能

用端异氰酸酯基聚丁二烯液体橡胶与环氧树脂制得端异氰酸酯基聚丁二烯橡胶-环氧树脂聚合物(ETPB)。在ETPB中分别加入质量分数为5%和10%的纳米三氧化二铝,并用胺类固化剂固化,制得ETPB/纳米三氧化二铝复合材料。测试了环氧树脂、ETPB和ETPB-纳米三氧化二铝复合材料在干滑动下的摩擦性能,考察了磨损率及摩擦系数与载荷和滑动速度之间的关系,用扫描电子显微镜对几种材料磨损表面进行了观察。结果表明,用端异氰酸酯基聚丁二烯液体橡胶改性环氧树脂可提高干滑动条件下环氧树脂的抗磨损性能;填充纳米三氧化二铝可显著提高ETPB的抗磨损性能,其最佳填充质量分数为5%。     

Nano⁃SiO2及PA6复合改性PE⁃UHMW的摩擦磨损性能研究

采用电子万能试验机、M-2000型摩擦试验机、电子和光学显微镜等测试分析方法,重点考察了纳米二氧化硅(nano-SiO2)及其与聚酰胺6(PA6)复合对超高分子量聚乙烯(PE-UHMW)摩擦磨损性能的影响.结果表明,随着nano-SiO2用量的增加,PE-UHMW复合材料的摩擦因数和磨损率均呈现出先降低后升高的趋势;当...     

Tribological behavior of the polyamide composite coating filled with different fillers under dry sliding

The polyamide (PA) composite coating filled with the particles of microsized MoS₂, microsized graphite, and nano‐Al₂O₃, respectively, were prepared by flame spraying. The friction and wear characteristics of the PA coating and composite coating filled with the varied content of filler under dry sliding against stainless steel were comparatively investigated using a block‐ring tester. The morphologies of the worn surfaces and transfer films on the counterpart steel ring were observed on a scanning electron microscope. The result showed that the addition of fillers to the composite coatings changed significantly the friction coefficient and wear rate of the coatings. The composite coatings filled with a low level content of fillers showed lower wear rate than did pure PA coating under dry sliding; especially the MoS₂/PA composite coating had the lowest wear rate among these composite coatings. The composite coatings with a high level content of fillers had higher wear rate than did pure PA coating, except of the Al₂O₃/PA composite coating. The bonding strengths between the polymer matrix and fillers changed with the content of the fillers, which accounted for the differences in the tribological properties of the composite coatings filled with the varied content fillers. On the other hand, the difference in the friction and wear behaviors of the composite coatings and pure coating were attributed to the difference in their worn surface morphologies and transfer film characteristics. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

Effect of solid lubricants on tribological behavior of glass fiber reinforced polyamide 6

The tribological properties of glass fiber reinforced polyamide 6 (GF/PA6, 15/85 by weight) and its composites filled with solid lubricants were investigated. The main purposes of this article were to study the hybrid effect of solid lubricants with glass fiber as well as the synergism of combined solid lubricants, the wear mechanisms were studied by SEM. The results showed that graphite impaired the tribological properties of GF/PA6, but the tribology behavior of graphite filled GF/PA6 composite could be significantly improved by polytetrafluroethylene (PTFE) or/and ultrahigh molecular weight polyethylene (UHMWPE), and the GF/PA6 composite filled with 5 wt % graphite, 5 wt % PTFE together with 5 wt % UHMWPE exhibited the lowest friction coefficient and wear rate, which was almost a reduction in friction coefficient by 37% and in wear rate by 34% contrast to GF/PA6. The effect of load was also studied, and the results showed that the friction coefficient was virtually not affected by load, while the wear rate all increased with increasing load. POLYM. COMPOS., 34:1783–1793, 2013. © 2013 Society of Plastics Engineers     

Friction and wear mechanisms of PA66/PPS blend reinforced with carbon fiber

The mechanical and tribological properties of carbon fiber (CF) reinforced polyamide 66 (PA66)/polyphenylene sulfide (PPS) blend composite were studied in this article. It was found that CF reinforcement greatly increases the mechanical properties of PA66/PPS blend. The friction coefficient of the sample decreases with the increase of CF content. When CF content is lower (below 30%), the wear resistance is deteriorated by the addition of CF. However, the loading of higher than 30% CF significantly improves the tribological properties of the blend. The lowest friction coefficient (0.31) and the wear volume (1.05 mm³) were obtained with the PA66/PPS blend containing 30% CF. The transfer film and the worn surface formed by sample during sliding were examined by scanning electron microscopy. The observations revealed that the friction coefficient of PA66/PPS/CF composite depends on the formation and development of a transfer film on the counterface. The abrasive wear caused by ruptured CFs (for lower CF content) and the load bearing ability of CFs (for higher CF content) are the major factors affecting the wear volume. In addition, the improvements of mechanical properties, thermal conductivity, and self‐lubrication of bulk CFs are also contributed to the wear behavior of PA66/PPS/CF composite. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

不同条件下两种纤维增强MC聚酰胺复合材料摩擦磨损性能研究

制备了单体浇铸聚酰胺（MCPA）、纤维质量占比30 %的玻璃纤维增强MC聚酰胺（GFMCPA）及体积占比35 %的碳纤维增强MC聚酰胺（CFMCPA），分别将3种材料在干摩擦、洁净水、干砂、水砂4种不同摩擦条件下进行摩擦磨损性能实验，并对实验结果进行对比分析。结果表明，干摩擦及洁净水条件下，CFMCPA的摩擦因数（f_CF）f_GF）f_MC）；干砂及水砂条件下，f_MC<f_CF<f_GF；3种材料在不同摩擦条件下的摩擦因数排序均为：洁净水条件下的摩擦因数（f_W）<水砂条件下的摩擦因数（f_WS）<干摩擦条件下的摩擦因数（f_D）<干砂条件下的摩擦因数（f_DS）；不同材料在4种摩擦条件下的体积磨损率排序均为：干摩擦条件下的磨损率（W_D）<洁净水条件下的磨损率（W_W）<水砂条件下的磨损率（W_WS）<干砂条件下的磨损率（W_DS）；不同摩擦条件下3种材料的体积磨损率排序均为：GFMCPA的磨损率（W_GF）W_CF）W_MC）；4种条件下，各材料的摩擦磨损性能各有高低，可以根据具体的性能要求，选择使用。