纳米SiC或Si3N4与玻璃纤维混杂填充PA6复合材料摩擦磨损性能研究

采用注塑成型法制备纳米SiC或Si3N4与玻璃纤维混杂填充PA6尼龙复合材料。采用MM-200型摩擦磨损试验机在干摩擦条件下考察了纳米颗粒含量及载荷对PA6复合材料摩擦磨损性能的影响。采用扫描电子显微镜观察分析磨损表面形貌及磨损机理。结果表明:纳米Si3N4与玻璃纤维混杂能使复合材料耐磨损性提高,以3%Si3N4与玻璃纤维混杂填充耐磨性最佳;而纳米SiC与玻璃纤维混杂会导致复合材料的磨损量增大,纳米SiC或Si3N4与玻璃纤维混杂填充PA6复合材料的摩擦系数都低于尼龙材料。     

GF增强PA6复合材料的力学与摩擦性能研究

采用熔融共混法制备玻璃纤维(GF)增强尼龙(PA)6复合材料,研究了GF含量对PA6/GF复合材料力学性能和摩擦性能的影响,并利用扫描电子显微镜对复合材料的磨损机理进行分析.结果表明,GF显著影响复合材料的力学性能和摩擦性能,GF质量分数为15%时增强效果较好,PA6/GF复合材料的缺口冲击强度比纯PA6提高5倍,摩擦因数降低43%,磨损量减少33%.GF含量较低时,PA6/GF复合材料的磨损以磨粒磨损和粘着磨损为主,含量较高时则主要表现为磨粒磨损和疲劳磨损.     

UPR/GF/纳米SiO2复合材料的摩擦学性能和力学性能研究

采用手糊成型室温固化的方法制备纳米SiO2/玻璃纤维(GF)布混杂增强不饱和聚酯树脂(UPR)复合材料,并对UPR复合材料的摩擦学性能和力学性能进行了研究。结果表明,加入纳米SiO2和GF布能大幅提高复合材料的摩擦学性能和力学性能。当复合材料中纳米SiO2含量分别为0.5%(质量分数,下同)和1%时,复合材料的耐磨性分别是纯UPR的5.3倍和3.1倍,拉伸强度是纯UPR的5.8倍和5.1倍,弯曲强度是纯UPR的3.9倍和3.2倍左右。在实验条件下,以含量为0.5%纳米SiO2和GF布混杂填充UPR复合材料的改性效果最好。扫描电镜分析表明,纯UPR的磨损机理是黏着磨损,复合材料磨损机理主要表现为黏着磨损和磨粒磨损。     

纳米Si3N4及其混杂填料改性PTFE的性能研究

采用模压成型的方法制备了纳米氮化硅(Si3N4)与二硫化钼(MoS2)、玻璃纤维(GF)、纳米三氧化二铝(Al2O3)混合填充的聚四氟乙烯(PTFE)复合材料,研究了PTFE复合材料的力学性能和摩擦学性能。采用扫描电子显微镜(SEM)观察分析了拉伸断面形貌及增强机理。结果表明：Si3N4及其混杂填料均使复合材料表面硬度增大;PTFE/Si3N4/Al2O3纳米复合材料具有较好的拉伸性能;混杂填料均可以显著改善PTFE复合材料的耐磨性能,其中5 %的Si3N4与10 %的Al2O3混杂填充复合材料的耐磨性最好,填料对复合材料摩擦因数影响不大。SEM分析表明,纳米Si3N4、Al2O3与PTFE基体界面结合较好。     

硅纳米材料与玻璃纤维混杂填充PA6复合材料的摩擦磨损性能研究

采用MM-200型摩擦磨损试验机对在干摩擦条件下3种硅纳米材料（纳米SiC、SiO2及Si3N4）与玻璃纤维混杂填充聚酰胺6（PA6）复合材料与45#钢对磨时的摩擦磨损性能进行了研究,并采用扫描电子显微镜对复合材料的磨损表面进行了观察。结果表明,3种纳米硅材料都能减小复合材料的摩擦因数,其中以纳米SiO2与玻璃纤维混杂效果最佳,纳米SiC、SiO2及Si3N4的最佳含量分别为3 %、5 %和3 %。纳米SiO2和纳米Si3N4能够提高复合材料的耐磨性,而纳米SiC会导致复合材料的磨损量增大。     

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     

纳米SiO2与玻璃纤维混杂增强聚酰胺6复合材料的摩擦磨损性能研究

采用MM-200型摩擦磨损试验机对干摩擦条件下纳米SiO2与玻璃纤维混杂填充聚酰胺6(PA6)复合材料与45#钢对摩时的摩擦磨损性能进行了研究。结果表明,纳米SiO2和玻璃纤维混杂可以显著改善PA6复合材料的摩擦磨损性能,以5 %的SiO2和20 %的玻璃纤维增强PA6的耐磨减摩性最好。扫描电镜分析表明,纯PA6的磨损以黏着和犁削为主。当载荷较低时,复合材料的磨损机制主要表现为不同程度的磨粒磨损,但当载荷较高时,复合材料的磨损机制主要表现为不同程度的疲劳磨损。     

聚芳醚腈酮/SiC/Si3N4耐高温耐磨纳米复合涂层研究

以新型耐高温聚芳醚腈酮(PPENK)树脂作为涂料成膜物质,纳米SiC和Si3N4共同作为耐磨填料,制备了一系列新型耐高温耐磨PPENK/SiC/Si3N4纳米复合涂料。对复合涂层的摩擦学性能及热性能进行研究,通过扫描电镜(SEM)观察涂层磨损表面形貌,分析涂层磨损机理。结果表明:纳米SiC和Si3N4填料能有效改善纯PPENK树脂涂层的摩擦磨损性能。当PPENK树脂含量为22%,m(SiC)∶m(Si3N4)为3∶2时,涂层摩擦系数最小;当PPENK树脂含量为20%,纳米填料m(SiC)∶m(Si3N4)为1∶1时,涂层磨损质量损失最小。热重分析(TGA)表明无机纳米填料的加入对涂层的热性能有略微增强的作用。PPENK/SiC/Si3N4纳米复合涂层的磨损机理以粘着磨损为主,兼有犁耕磨损。     

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。     

PHB与纳米Cu对PTFE/GF复合材料摩擦学性能的影响

考察了聚苯酯(PHB)与纳米铜(Cu)协同改性对聚四氟乙烯/玻纤(PTFE/GF)复合材料摩擦磨损性能的影响,探讨了复合材料的磨损表面形貌及磨损机理.结果表明,当PHB质量分数为6％时,PTFE/GF/PHB复合材料的摩擦因数最低,达到0.175,但磨损率较大,为6.84×10-6mm3/(N·m).在此基础上,采用PHB与纳米Cu复合改性PTFE/GF复合材料,当纳米Cu质量分数为0.3％和PHB质量分数为6％时,复合材料的摩擦学性能最佳,摩擦因数为0.194,磨损率仅为1.60×10-6mm3/(N·m).纳米Cu的加入使复合材料的摩擦因数能较早达到平稳阶段.SEM分析表明,PTFE/GF复合材料表现为严重的磨粒磨损,磨损表面出现深且宽的犁沟;与PTFE/GF复合材料相比,PTFE/GF/PHB复合材料磨粒磨损得到极大改善,磨粒磨损程度大大减小;PTFE/GF/6％ PHB/0.3％纳米Cu复合材料的磨损面更加光滑平整,表现为极轻微的磨粒磨损,耐磨性最好.     

聚酰胺66改性玻璃纤维增强聚苯硫醚体系的摩擦学性能研究

研究了聚酰胺66(PA66)改性玻璃纤维(GF)增强聚苯硫醚(PPS)（PPS/PA66/GF）复合体系的摩擦因数、磨损体积、磨损后表面的微观形貌及损耗因子峰值、储能模量对摩擦因数的影响。结果表明,PA66的加入显著改善了复合材料的摩擦学性能,当PA66含量为40 %（质量分数,下同）时,磨损最小,为5.24 mm3,相对于PPS+30 %GF(13.60 mm3)下降了61 %;扫描电镜分析磨损表面,随着PA66含量的增加,磨损机理由磨粒磨损转为粘着磨损;复合材料损耗因子峰值越大,摩擦因数越小;初始储能模量越大,摩擦因数越小。     

Effects of solid lubricants on friction and wear behaviors of polyamide 6

As solid lubricants, Polytetrafluoroethylene (PTFE), graphite, and ultra‐high molecular weight polyethylene (UHMWPE) can improve the tribological properties of PA6. The mechanical and the tribological properties of polyamide 6 (PA6) composites filled with solid lubricants were researched. The blended materials were injection molded to provide the test samples. Mechanical properties were studied in terms of the tensile strength and impact strength. Friction and wear experiments were run at a rotating speed of 1500 rpm and under loads of 40 and 160 N. The worn surfaces were examined using a scanning electron microscope. It was found that an improvement of tribological properties can be obtained by preparing PA6 composites, which was closely related to the varieties and the contents of solid lubricants added. At a load of 40 N, PTFE was the most effective to have reductions of both coefficient and mass wear rate, while at a load of 160 N, UHMWPE was the most helpful. The effects of Combination Solid Lubricants were also discussed. The results showed that synergistic reaction can be gained to modify the tribology capabilities of PA6. Moreover, the micrographs taken in the worn surface of PA6 composites revealed that adhesive wear, abrasive wear and fatigue wear occurred in this study. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

混杂填料增强PA6复合材料摩擦磨损性能

利用M-2000型摩擦磨损试验机考察载荷以及纳米Si_3N_4/SiO_2与玻璃纤维的混合填料对PA6复合材料摩擦磨损性能的影响,用扫描电子显微镜观察分析磨损表面形貌及磨损机理.结果表明:纳米材料与玻璃纤维的协同作用显著改善了材料的摩擦磨损性能,以3%纳米Si_3N_4与玻璃纤维混杂填充耐磨性最佳;以5%纳米SiO_2与玻璃纤维混杂摩擦因数最低.     

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 properties of PTFE composites filled with PA6

Blending Polytetrafluoroethylene (PTFE) to PA6 at different compositions was produced in a corotating twin‐screw extruder, where PTFE acts as the polymer matrix and PA6 as the dispersed phase. The effects of PA6 content on the tribological properties of the composites were investigated. The worn surface morphologies of neat PTFE and its composites were examined by scanning electron microscopy (SEM), and the wear mechanisms were discussed. The presence of PA6 particles dispersed in the PTFE continuous phase exhibited superior tribological characteristics to unfilled PTFE. The optimum wear reduction was obtained when the content of PA6 is 30 vol%. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers     

减摩耐磨环氧树脂纳米复合材料的研究

为提高环氧树脂的减摩耐磨性能,本工作采用高硬度纳米氮化硅粒子和具有优异自润滑和导热性能的短碳纤维进行填充改性,以期通过填料之间的协同作用,显著降低复合材料的表面摩擦力和摩擦面温度,从而提高抵抗磨损能力。摩擦磨损实验结果表明,同时加入纳米氮化硅粒子和短碳纤维时,可以获得优于加入单一填料所获得的摩擦磨损性能。纳米氮化硅粒子/短碳纤维/环氧树脂复合材料的磨损机理主要是粘着磨损和磨粒磨损。     

Mechanical and tribological properties of PA66/PPS blend. III. Reinforced with GF

Based on previous work, 70 vol % PA66/30 vol % PPS blend was selected as a matrix, and the PA66/PPS blend reinforced with different content of glass fiber (GF) was prepared in this study. The mechanical properties of PA66/PPS/GF composites were studied, and the tribological behaviors were tested on block‐on‐ring sliding wear tester. The results showed that 20–30 vol % GF greatly increases the mechanical properties of PA66/PPS blend. When GF content is 20 vol %, the friction coefficient of composite is the lowest (0.35), which is decreased by 47% in comparison with the unfilled blend. The wear volume of the GF‐reinforced PA66/PPS blend composite decreases with the increase of GF content. However, the wear‐resistance is not apparently improved by the addition of GF in the experimental range for comparison with unfilled PA66/PPS blend. The worn surface and the transfer film on the counterface were examined by scanning electron microscopy (SEM). The observations revealed that the friction coefficient of composite depends on the formation and development of a transfer film. The wear mechanism involves polymer matrix wear and fiber wear. The former consists of melting wear and plastic deformation of the matrix, while the latter includes fiber sliding wear, cracking, rupturing, and pulverizing. The contributions of the matrix wear and the fiber wear determine the ultimate wear volume of PA66/PPS/GF composite. In addition, the abrasive action caused by the ruptured glass fiber is also a very important factor. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 523–529, 2006     

EP/氧化石墨烯–硬脂酸丁酯微胶囊复合材料

采用种子微悬浮聚合法制备了聚苯乙烯/氧化石墨烯复合囊壁包覆硬脂酸丁酯微胶囊润滑材料(MGO–Micro LMs),以MGO–Micro LMs为润滑填料,环氧树脂(EP)为基体材料,采用浇注成型工艺制备了EP/MGO–Micro LMs复合材料。采用滑动摩擦磨损试验仪评价了MGO–Micro LMs对EP基体材料摩擦学性能的影响;采用扫描电子显微镜对磨损面的微观形貌进行表征,并探究了其磨损机理。结果表明,MGO–Micro LMs能够显著地降低EP的摩擦系数和磨损量,当MGO–Micro LMs质量分数为20%时,EP/MGO–Micro LMs复合材料的摩擦系数为0.138 44,磨损量减少了约42.3%,磨损机理主要为磨粒磨损。