无机填料对聚四氟乙烯复合材料的摩擦学性能影响研究现状

简要介绍了聚四氟乙烯作为润滑材料的优点、不足、摩擦学作用机理以及目前我国使用无机填料对聚四氟乙烯材料进行改性的研究现状,针对无机填料填充聚四氟乙烯复合材料存在的问题,对以后研究方向提出了一定的见解.     

无机材料填充改性PTFE复合材料研究进展

综述了聚四氟乙烯（PTFE）无机材料填充改性中纤维填充改性,颗粒填充改性以及复合填充改性三大类的改性研究进展。介绍了不同无机填料对于PTFE复合材料的力学性能以及摩擦学性能的影响,包括摩擦因数、拉伸强度以及材料硬度等,发现铜（Cu）粉、二硫化钼（MoS2）以及玻璃纤维（GF）等无机填料成本较低且对PTFE的力学性能以及摩擦学性能改善较为明显,更能满足实际工程应用。最后,分析了国内外近年来研究中所存在的问题,并提出了解决方向。     

改性聚四氟乙烯摩擦学研究进展

介绍了PTFE及其复合材料摩擦磨损性能的国内外研究进展.详细阐述了改性聚四氟乙烯的摩擦性能的三种方法及其优缺点,指出摩擦学领域改性PTFE的主要方法为填充改性,并总结了PTFE及其复合材料摩擦磨损性能的主要研究方向.     

自润滑复合镀层的摩擦学性能及其强化机理分析

探讨自润滑复合镀层的摩擦学性能及其增强相的摩擦磨损强化机理;分析经具有自润滑性能的石墨、二硫化钼、聚四氟乙烯及碳纳米管等改性的复合镀层的摩擦学行为;并探讨该类复合镀层的摩擦磨损强化机制。     

聚四氟乙烯改性研究进展

从聚四氟乙烯的组成、结构、物理化学特性以及成型加工等方面说明对聚四氟乙烯进行改性的必要性；并对其表面改性、填充改性、共混改性等方法进行了详细的介绍，最后指出了聚四氟乙烯改性的新方向。     

硅灰石的表面改性对其填充PTFE复合材料摩擦学性能和力学性能的影响

利用钛酸酯偶联剂、硅烷偶联荆和硬脂酸对硅灰石进行表面改性,并对改性后的硅灰石进行类似与聚四氟乙烯(PTFE)复合加工过程中的热处理,测量其处理前后填料与水的接触角的变化,同时还考察了3种改性剂对PTFE/硅灰石复合材料的摩擦学性能和力学性能的影响.结果表明,硅烷偶联剂改性的硅灰石经过热处理后与水的接触角由64.5°增加到126.5°,表面能接近PTFE基体,相比其它改性荆能够更有效地提高复合材料的摩擦学性能和力学性能.     

填充改性聚四氟乙烯拉伸多孔膜的研究进展

选择聚四氟乙烯(PTFE)拉伸多孔膜作为论述对象,概述了聚四氟乙烯的特征性能以及聚四氟乙烯拉伸多孔膜的改性技术现状,并针对聚四氟乙烯拉伸多孔膜改性后功能的不同,着重地介绍了相关填充改性的聚四氟乙烯拉伸多孔膜的技术方法。最后,还对聚四氟乙烯拉伸多孔膜的改性研究存在的问题及发展方向进行了合理的展望。     

工程塑料聚四氟乙烯改性研究进展

聚四氟乙烯（PTFE）是一种特殊的工程塑料，具有广泛的用途。叙述了聚四氟乙烯表面改性、填充改性以及共混改性的研究开发进展，提出了其今后的发展趋势。     

聚四氟乙烯及其应用研究进展

介绍了聚四氟乙烯的性能、特点,聚四氟乙烯及聚合物合金改性的常用方法,以及聚四氟乙烯材料在电子电气、医疗及环保等领域的应用。     

PTFE复合材料摩擦学性能的研究

纳米科技、纤维化处理和新型材料等高新技术的发展为改善聚四氟乙烯(PTFE)的耐磨性提供了新途径。PTFE摩擦学改性的目的之一在于提升其抗蠕变性,而摩擦过程中PTFE能否在对偶表面形成牢固附着的转移膜仍是PTFE润滑、耐磨材料研究应倍加关注的重点。     

聚四氟乙烯复合材料摩擦学性能研究

综述了PTFE复合材料摩擦学性能的国内外研究进展,系统阐述了不同填料对PTFE复合材料摩擦学性能的影响,指出多种填料混合填充可提高PTFE复合材料的承载能力和耐磨损性能,降低其摩擦系数.     

Effects of various kinds of fillers on the tribological behavior of polytetrafluoroethylene composites under dry and oil‐lubricated conditions

Polytetrafluoroethylene (PTFE)‐based composites filled with various inorganic fillers in a volume fraction of 30% were prepared. The tribological behavior of the PTFE composites sliding against AISI52100 steel under dry and liquid paraffin‐lubricated conditions was investigated on an MHK‐500 model ring‐on‐block test rig. The morphologies of worn surfaces and wear debris were observed with a scanning electron microscope (SEM) and an optical microscope. As the results, different fillers show different effects on the tribological behavior of the PTFE composites, while the composite shows much different tribological behavior under lubricated conditions as compared with dry sliding. The tribological behavior of the PTFE composites under dry sliding is greatly related to the uniformity and thickness of the transfer films. Only the PTFE composites with a transfer film of good uniformity and proper thickness may have excellent tribological behavior. The PTFE composites show much better tribological behavior under lubrication of liquid paraffin than under dry sliding, namely, the friction coefficients are decreased by 1 order of magnitude and the wear rate by 1–3 orders of magnitude. Observation of the worn composite surfaces with SEM indicates that fatigue cracks were generated under lubrication of liquid paraffin, owing to the absorption and osmosis of liquid paraffin into the microdefects of the PTFE composites. The creation and development of the fatigue cracks led to fatigue wear of the PTFE composites. This would reduce the mechanical strength and load‐supporting capacity of the PTFE composites. Therefore, the tribological behavior of the PTFE composites under lubrication of liquid paraffin is greatly dependent on the compatibility between the PTFE matrix and the inorganic fillers. In other words, the better is the compatibility between PTFE and fillers the better is the tribological behavior of the composites. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1891–1897, 2001     

Tribological properties and corrosion resistance of epoxy resin-polytetrafluoroethylene bonded solid lubricating coating filled with flake aluminum

The aims of this work are to prepare a novel epoxy resin-polytetrafluoroethylene (expressed as EP/PTFE) bonded solid lubricating coating filled with flake aluminum. The focus is to study the effects of two different flake aluminum (floating type and non-floating type) on the tribological performance and anti-corrosion capability of the coating. A CSM friction tester was applied to evaluate the tribological performance of the coating. The electrochemical technique was applied to study the corrosion resistance of the coating. And the experimental results showed that both types of flake aluminum can ameliorate the tribological performance and anti-corrosion properties of the EP/PTFE lubricating coating. Moreover, compared with floating flake aluminum, the incorporation of non-floating flake aluminum significantly improved the tribological properties and corrosion resistance of the EP/PTFE coating due to its good dispersibility, greater enhancement effect on mechanical performance and stronger barrier properties.     

聚苯硫醚/聚四氟乙烯复合材料的研究

制备并研究了PPS/PTFE合金的热行为、力学性能以及摩擦学性能,并对其微观形态进行了观察。实验结果表明,此合金的耐热性能相对于聚苯硫醚纯树脂有明显的提高,而且聚四氟乙烯的加入可以改善聚苯硫醚的力学性能及摩擦磨损性能。     

The Effect of Carbon Fiber Content on the Mechanical and Tribological Properties of Carbon Fiber-Reinforced PTFE Composites

Blending polytetrafluorothylene (PTFE) to carbon fiber at different compositions was produced in a corotating twin screw extruder where PTFE acts as the polymer matrix and carbon fiber as the dispersed phase. The effects of carbon fiber content on mechanical and 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 carbon fiber dispersed in the PTFE continuous phase exhibited superior tribological characteristics to unfilled PTFE. The optimum wear reduction was obtained when the content of carbon fiber is 30 vol%.     

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     

Coating of polytetrafluoroethylene/polyacrylate: Core-shelled structure and tribological behaviors

In order to improve the tribological properties of polytetrafluoroethylene (PTFE), the core-shelled PTFE/polyacrylate nanoparticles were prepared by seed emulsion polymerization and its tribological behaviors were investigated. The core–shell structure was determined by a Fourier transform infrared spectrometer and transmission electron microscopy. The results of thermoanalysis showed that polyacrylate had lost more weight than PTFE/polyacrylate composite above 300 °C, which indicated an improvement in the thermal stability. Moreover, the friction and wear results indicated that friction coefficient of PTFE/polyacrylate coating keeps at a relatively lower level, which is between that of PTFE and polyacrylate, and the wear volume is the smallest, so that an excellent performance of low friction and wear resistance was demonstrated. Besides, the tribological properties of the core-shelled coating are maintained to be stable under high load or high speed. Therefore, the core-shelled nanoparticles would be potential to polymer coating as high-performance solid lubricants. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47774.     

Properties of potassium titanate whisker reinforced polytetrafluoroethylene-based friction materials of ultrasonic motors

Ultrasonic motors (USMs) are driven by friction forces between a stator and rotor. So the output properties and life of USMs are strongly related to the properties, such as the mechanical and tribological properties, of the frictional materials. In this study, the effects of the content of potassium titanate whiskers (PTWs) on the mechanical and tribological properties of polytetrafluoroethylene (PTFE)-based friction materials and the performances of the corresponding USMs were studied. The morphology of worn surfaces of PTFE composites were observed with a scanning electron microscope. The experimental results show that the PTWs not only increased the hardness and elastic modulus of the PTFE composites but also increased the friction coefficient and wear resistance of the PTFE composites. On the whole, the PTFE-based friction materials filled with 5 wt % PTWs were the preferable friction materials for USMs. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

高分子润滑剂对PBTP摩擦磨损性能的影响

探讨了ＰＴＦＥ、ＵＭＷＰＥ对ＰＢＴＰ摩擦、磨损性能的影响。结果表明，添加５％和ＵＨＭＷＰＥ或ＰＴＦＥ的ＰＢＴＰ与纯ＰＢＴＰ相比，摩擦因数大幅度降低；ＰＶ值明显提高，可分别为ＰＢＴＰ的２．４倍和１．６倍；耐磨损性较为ＰＢＴＰ提高约２０倍和３０倍