Development of self-lubricating antifriction materials based on polytetrafluoroethylene and modified zeolites

Гоголева, О. В.; Охлопкова, А. А.; Петрова, П. Н.

doi:10.3103/s1068366614050055

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…В последние годы наблюдается повышенный интерес к сверхвысокомолекулярному полиэтилену (СВМПЭ), обладающему рядом уникальных свойств: высокая прочность, стойкость к удару и к растрескиванию, стабильность высоких прочностных характеристики в широком интервале температур и др. Для повышения прочности и износостойкости полимер модифицируют различными наполнителями от 0,5 до 50 % по массе, используя кокс, графит, дисульфид молибдена, сиалон, металлические порошки, оксиды, нитриды, шпинели, цеолиты, керамики, различные волокна [1,2].…”

Section: Introductionunclassified

RESEARCH OF THERMAL PROPERTIES AND STRUCTURE OF UHMWPE COMPOSITES WITH Β-Sialon AFTER EXPLOSIVE PRESSING

et al. 2020

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With the aim of developing a technology for explosive pressing of powder composite mixtures of ultra-high molecular weight polyethylene (UHMWPE) with inorganic fillers, the thermomechanical properties and structure of a composite containing 5% β-sialon after static and explosive pressing were investigated. It was found that explosive pressing with a pressure of 0.75 GPa provides a composite heat resistance close to that of the initial UHMWPE (142-148 °C), reducing its thermal deformation expansion, which is associated with an increase in intermolecular as well as adhesive interaction at the phase boundary. During sintering, the polymer matrix is monolithized, and higher heat resistance is achieved after sintering under pressure. The research results allow us to recommend a method of explosive pressing for industrial processing of a composite mixture of UHMWPE + 5% β-sialon.

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Section: Introductionunclassified

RESEARCH OF THERMAL PROPERTIES AND STRUCTURE OF UHMWPE COMPOSITES WITH Β-Sialon AFTER EXPLOSIVE PRESSING

et al. 2020

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“…Metallic silver NPs in UHMWPE demonstrated good wear and tribochemical properties . We have reported different techniques to modify polymer nanocomposites (PNCs) to achieve good tribotechnical and mechanical properties. It is to be noted that the uniform distribution of NPs in the PNCs is critical to achieving high tribotechnical and mechanical properties .…”

Section: Introductionmentioning

confidence: 99%

Supramolecular Structure and Mechanical Characteristics of Ultrahigh‐Molecular‐Weight Polyethylene–Inorganic Nanoparticle Nanocomposites

Охлопкова

Borisova

Никифоров

et al. 2016

Bulletin Korean Chem Soc

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We investigated the mechanical properties and structure of polymeric nanocomposites (PNCs) with an ultrahigh-molecular-weight polyethylene (UHMWPE) matrix and aluminum and silicon oxide and nitride nanoparticle (NP) fillers. Mixing with a paddle mixer or by joint mechanical activation in a planetary mill was used for the PNC preparation. Joint mechanical activation afforded PNCs with better mechanical properties than paddle mixing. Scanning electron microscopy suggested that the poorer mechanical properties can be attributed to the disordered regions and imperfect spherulites in the PNC supramolecular structure arising from paddle mixing. The better mechanical properties observed with joint mechanical activation may derive from the uniform NP distribution in the polymer matrix and absence of disordered regions.Keywords: Ultrahigh-molecular-weight polyethylene, Nanoparticle, Polymer nanocomposite, Mechanical characteristics, Supramolecular structure IntroductionIn recent years, the design and controlled fabrication of nanostructured materials with defined physicochemical properties have gained considerable interest. 1 Nanocomposites based on polymers and inorganic nanoparticles (NPs) have, in particular, demonstrated significant performance in terms of mechanical properties, fire resistance, gas permeability, and electrical conductivity.1 Conventional sealing, structural, and antifriction materials usually undergo degradation under extreme conditions, such as very low temperatures.2 Therefore, materials for application in arctic environments require high strength as well as frost, wear, and corrosion resistance. Ultrahigh-molecular-weight polyethylene (UHMWPE) is known to retain its high mechanical and tribotechnical properties at low temperatures, including cryogenic conditions, 2,4 and under high loading. 5 UHMWPE also shows excellent self-lubrication properties, high-impact strength, and excellent corrosion and frost resistance in comparison with other polymers. High-density UHMWPE provides good stiffness characteristics and abrasion and chemical resistance. 5 In addition to the intrinsic characteristics of UHMWPE, its mechanical and tribotechnical properties have been improved by the addition of NP fillers to the polymer. 6 Briscoe et al. demonstrated that the addition of PbO and CuO fillers to high-density polyethylene reduced wear because of the formation of a strong transfer film.7 By manufacturing composites of UHMWPE and ceramics such as Al 2 O 3 , ZrO 2 , and Si 3 N 4 , biocompatible and wear-and scratch-resistant hybrid materials were successfully fabricated recently and found applications in orthopedics. 8,9 Metallic silver NPs in UHMWPE demonstrated good wear and tribochemical properties. 10 We have reported different techniques to modify polymer nanocomposites (PNCs) 2,11 to achieve good tribotechnical and mechanical properties. It is to be noted that the uniform distribution of NPs in the PNCs is critical to achieving high tribotechnical and mechanical properties.12 Here, we report joint mechanical ...

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Effect of Black Phosphorus Oxidation on Tribological Properties of Polytetrafluoroethylene-Based Composites

Wang

Zhu

Xie

et al. 2022

J. of Materi Eng and Perform

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Development of self-lubricating antifriction materials based on polytetrafluoroethylene and modified zeolites

Cited by 7 publications

References 3 publications

RESEARCH OF THERMAL PROPERTIES AND STRUCTURE OF UHMWPE COMPOSITES WITH Β-Sialon AFTER EXPLOSIVE PRESSING

RESEARCH OF THERMAL PROPERTIES AND STRUCTURE OF UHMWPE COMPOSITES WITH Β-Sialon AFTER EXPLOSIVE PRESSING

Supramolecular Structure and Mechanical Characteristics of Ultrahigh‐Molecular‐Weight Polyethylene–Inorganic Nanoparticle Nanocomposites

Effect of Black Phosphorus Oxidation on Tribological Properties of Polytetrafluoroethylene-Based Composites

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