Design and study of nanomodified composite fluoropolymer materials for tribotechnical purposes

Dykha, Aleksandr; Svidersky, V. P.; Даниленко, И. А.; Bilichenko, Viktor; Kukurudzyak, Yuri; Kirichenko, Ludmila

doi:10.15587/1729-4061.2020.214533

Cited by 4 publications

(4 citation statements)

References 27 publications

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“…One of the options for solving problems associated with increasing the characteristics of PTFE, at insignificant additional costs for the technological process of processing, is the introduction, in addition to CFs, of special dispersed fillers (nanopowders). In work [11], it was proposed to use zirconium oxide (dioxide) as fillers, in addition to CFs. It has been shown that the introduction of such a filler makes it possible to improve the physical-mechanical characteristics of PTFE, in particular, tensile strength, by more than three times.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…However, insignificant concentrations of zirconium dioxide, which do not exceed 1...2 % by weight, create additional obstacles regarding the uniform distribution of the filler in the matrix. This issue was not paid due attention in work [11]. In addition, the cost of nanopowders is quite high, which leads to a rise in the price of the modified PCM.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determination of the influence of a filler on the properties of composite materials based on polytetrafluorothylene for tribosystems of mechanisms and machines

Dudin

Makarenko

Derkach

et al. 2021

EEJET

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This paper reports a comprehensive laboratory study into the thermophysical, physical-mechanical characteristics, and tribological properties of the designed composite materials based on polytetrafluoroethylene. In the structures of machines and mechanisms, a significant role belongs to the tribological conjugations made from polymeric and polymer-composite materials. The reliability of machines, in general, depends to a large extent on the reliability of movable connections. Composite materials of nonmetallic origin have a low cost, they are resistant to most aggressive chemicals and are capable of operating under conditions without lubrication. It was established that the characteristics and properties of materials must be adapted to the working conditions of separately considered tribological conjugations. The mechanisms of thermal destruction have been established, both in the basic material and the carbon fiber based on it. It was found that carbon fiber, regardless of its content (quantity) in the polymer-composite material based on polytetrafluoroethylene, is mainly oriented perpendicular to the force application plane. It was found that with an increase in the carbon fiber content from 10 to 40 % by weight, the heat capacity decreases by 16‒39 % compared to the main material. The optimal operating modes for the designed composite materials have been substantiated on the basis of a pv factor: under a dry friction mode – up to 4 MPa∙m/s; at friction with lubrication – up to 36.4 MPa∙m/s. The dependence has been established of the friction coefficient on the operating modes of a composite material based on polytetrafluoroethylene containing 20 % by weight of carbon fiber when lubricated with oil and water. The results reported here make it possible to synthesize the physical-mechanical characteristics and tribological properties of composite materials in accordance with the required modes of tribological conjugation.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of the influence of a filler on the properties of composite materials based on polytetrafluorothylene for tribosystems of mechanisms and machines

Dudin

Makarenko

Derkach

et al. 2021

EEJET

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show abstract

“…For PTFE, there is a possibility for the effective purposeful regulation of operational characteristics by filling [ 13 , 14 , 15 ]. It has been practically established [ 16 , 17 , 18 ] that in order to maintain at least 60–70% strength and 50% relative elongation of pure PTFE, the volume fraction of the introduced fillers should not exceed 20%.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Polymer Composite Materials Chaotically Reinforced with Spherical and Cylindrical Inclusions

et al. 2022

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The technical and economic efficiency of new PCMs depends on the ability to predict their performance. The problem of predicting the properties of PCMs can be solved by computer simulation by the finite element method. In this work, an experimental determination of the physical and mechanical properties of PTFE PCMs depending on the concentration of fibrous and dispersed filler was carried out. A finite element model in ANSYS APDL was built to simulate the strength and load-bearing capacity of the material with the analysis of damage accumulation. Verification of the developed computer model to predict the mechanical properties of composite materials was performed by comparing the results obtained during field and model experiments. It was found that the finite element model predicts the strength of chaotically reinforced spherical inclusions of composite materials. This is due to the smoothness of the filler surfaces and the lack of filler dissection in the model. Instead, the prediction of the strength of a finite element model of chaotically reinforced cylindrical inclusions of composite materials requires additional analysis. The matrix and the fibrous filler obviously have stress concentrators and are both subject to the difficulties of creating a reliable structural model.

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“…This is primarily due to their high reliability, ability to work under a friction mode with lubrication, and resistance to a significant amount of aggressive chemicals. In addition to advantages, PCM have a number of disadvantages, namely, limited operating modes (magnitude and nature of the load, linear sliding speed) and technological modes of processing the source material into articles [2,3]. The main direction of improving the characteristics of PCM is the introduction of special fillers in their structure, but often, due to the high cost of the materials obtained, their widespread use is limited.…”

Section: Introductionmentioning

confidence: 99%

Determining the influence of a filler on the properties of composite materials based on Phenylone C2 for tribojunctions in machines and assemblies

Dudin

Makarenko

Derkach

et al. 2022

EEJET

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The introduction of polymer-composite materials makes it possible not only to solve the problem of increasing durability, reducing the mass and cost of machines, but also, by introducing fillers, to adapt them to the required operating conditions. At the same time, there is a problem regarding the high cost of technologies for obtaining composites, which limits their widespread implementation. That is why the object of this research is the processes of influence of the filler on the characteristics and properties of polymer-composite materials. Complex laboratory studies of physical and mechanical characteristics, tribological and thermophysical properties of the developed polymer-composite materials based on Phenylone C2 were carried out. The dependence of the coefficient of friction and wear of the material based on Phenylone C2, containing thermally expanded graphite, on the pressure and nature of counter-bodies during friction with lubrication and without it was established. It was revealed that the minimum amount of wear of the material, with friction with lubrication, is achieved under the pressure on tribojunction of 5 MPa. It was established that with an increase in the concentration of filler from 5 to 25 wt% the coefficient of thermal conductivity increases by 4–40.8 %, compared with that non-filled with Phenylone C2. It was found that the introduction of thermally expanded graphite into Phenylone C2 in the amount of 5 wt % leads to a decrease in heat capacity by 34 %. The proposed technology of obtaining polymer-composite materials in the electromagnetic field provides sufficient physical and mechanical characteristics, tribological properties and low cost of finished products (parts). The results reported here make it possible to adapt the physical and mechanical characteristics, thermophysical and tribological properties of polymer-composite materials to certain modes of operation of movable junctions

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Design and study of nanomodified composite fluoropolymer materials for tribotechnical purposes

Cited by 4 publications

References 27 publications

Determination of the influence of a filler on the properties of composite materials based on polytetrafluorothylene for tribosystems of mechanisms and machines

Determination of the influence of a filler on the properties of composite materials based on polytetrafluorothylene for tribosystems of mechanisms and machines

Modeling of Polymer Composite Materials Chaotically Reinforced with Spherical and Cylindrical Inclusions

Determining the influence of a filler on the properties of composite materials based on Phenylone C2 for tribojunctions in machines and assemblies

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