Experimental Investigation on Tribological Characteristics of NaOH Treated Chopped Abaca Fiber Reinforced Epoxy Composites

Kurien, Rittin Abraham; Selvaraj, D. Philip; Sekar, M.; Rathanasamy, Rajasekar; Koshy, Chacko Preno

doi:10.4028/www.scientific.net/msf.1019.25

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…The method of optical microscopy confirmed ( Figure 11 b,c) that multiple deformations of CM as a result of micro-impacts by abrasive particles lead to the formation of microcracks on the surface, the plane of which is perpendicular to the direction of movement of the hydroabrasive mixture. In this case, grooves appear on the contact surface that have an orientation in the direction of the sliding speed vector of the hydroabrasive flow [ 55 , 56 , 57 ]. Mostly, such a mechanism makes an insignificant contribution to the activation process, compared to the mechanism of plastic deformation, which is dominant for epoxy matrix.…”

Section: Resultsmentioning

confidence: 99%

Functional Polymer Nanocomposites with Increased Anticorrosion Properties and Wear Resistance for Water Transport

Buketov,

Sapronov,

Klevtsov

et al. 2023

Polymers

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Corrosive destruction and hydroabrasive wear is a serious problem in the operation of machine parts and water transport mechanisms. It is promising to develop new composite materials with improved properties to increase the reliability of transport vehicles. In this regard, the use of new polymer-based materials, which are characterized by improved anticorrosion properties and wear resistance, is promising. In this work, therefore, for the formation of multifunctional protective coatings, epoxy dian oligomer brand ED-20, polyethylene polyamine (PEPA) hardener, a mixture of nanodispersed compounds with a dispersion of 30–90 nm, fillers Agocel S-2000 and Waltrop with a dispersion of 8–12 μm, and particles of iron slag with a dispersion of 60–63 μm are used for the formation of multifunctional protective coatings. Using the method of mathematically planning the experiment, the content of additives of different physico-chemical natures in the epoxy binder is optimized to obtain fireproof coatings with improved operational characteristics. A mathematical model is developed for optimizing the content of components in the formation of protective anticorrosion and wear-resistant coatings for means of transport as a result of the complex effect of a mixture of nanodispersed compounds, iron scale, and Waltrop. Based on the mathematical planning of the experiment, new regularities of increasing the corrosion resistance and resources of the means of transport are established through the formation of four different protective coatings, which are tested for resistance to aggressive environments (technical water—CAS No. 7732-18-5, gasoline—CAS No. 64742-82-1, acetone—CAS No. 67-64-1, I-20A lubricant—CAS No. 64742-62-7, sodium solutions—CAS No. 1310-73-2, and sulfuric acid—CAS No. 7664-93-9) and hydroabrasive wear resistances. A study of the change in the permeability index in aggressive environments is additionally carried out, taking into account the rational ratio of dispersive fillers in the epoxy binder, which made it possible to create an effective barrier to the penetration of aggressive water molecules into the base. A decrease in the permeability of protective coatings by 2.0–3.3 times relative to the epoxy matrix is achieved. In addition, the wear resistance of the developed materials under the action of hydroabrasion is investigated. The relative resistance of the CM to the action of hydroabrasion was found by the method of materials and coatings testing on the gas-abrasive wear with a centrifugal accelerator. This method enables one to model the real process of the wear of mechanism parts under the hydroabrasive action. It is shown that the coefficient of the wear resistance of the developed materials is 1.3 times higher than that of the polymer matrix, which indicates the resistance of the composites to the influence of hydroabrasive environment. As a result, modified epoxy composite protective coatings with improved anticorrosion properties and wear resistance under hydroabrasive conditions are developed. It is established that the protective coating filled with particles of a mixture of nanodispersed compounds (30–90 nm), iron scale (60–63 μm), and Waltrop (8–12 μm) has the lowest permeability indicators. The permeability in natural conditions of such a coating during the time t = 300 days of the study is χ = 0.5%, which is 3.6 times less than the similar indicators of the epoxy matrix. It is substantiated that the protective coating filled with particles of a mixture of nanodispersed compounds (30–90 nm), iron scale (60–63 μm), and Agocel S-2000 (8–12 μm) is characterized by the highest indicators of wear resistance. The coefficient of wear resistance under the action of hydroabrasion of such a coating is K = 1.75, which is 1.3 times higher than the similar indicators of the original epoxy matrix.

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Section: Resultsmentioning

confidence: 99%

Functional Polymer Nanocomposites with Increased Anticorrosion Properties and Wear Resistance for Water Transport

Buketov,

Sapronov,

Klevtsov

et al. 2023

Polymers

View full text Add to dashboard Cite

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“…Among the existing pigments, phosphate-containing pigments are belonging to the electrochemical active class [11,12]. Zinc phosphate (ZP) pigment is often used in organic coatings to replace chromium-based pigments, which are toxic despite a significant protective effect [13,14]. However, zinc phosphate is a scarce material compared to chromate [15,16].…”

Section: Introductionmentioning

confidence: 99%

Corrosion-Resistant Epoxy Coatings Filled with Nanoparticles of Vegetable Origin to Protect Water Vehicles

Sapronov,

Dyadyura,

Vorobiov

et al. 2023

J. Nano- Electron. Phys.

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The structure of the developed epoxy coatings using IR spectral analysis and corrosion resistance by determining the permeability index in the aggressive environment of river water during t  6552 h at a temperature range T  258...303  2 K was investigated in the article. It was shown that the process of structure formation of epoxy coatings is influenced by the change in the ratio of nano-disperse and fibrous fillers in epoxy ED-20 oligomer. Significant structural changes for epoxy coatings were observed at wave numbers: ν  570 cm -1 , ν  840 cm -1 , ν  1045 cm -1 , ν  2962 cm -1 , which indicates their degree of crosslinking. A study on the change in the permeability index in the environment of river water was carried out with consideration of rational proportion of dispersive fillers in the epoxy binder, which made it possible to create an effective barrier to the penetration of aggressive ions and water molecules to the base. A decrease in the permeability of protective coatings by 1.8 ... 2.0 times relative to the epoxy matrix was achieved. In addition, a visual analysis of the surface coatings operated under the influence of river water at variable temperatures was carried out. For the epoxy matrix and composites containing one filler, defects in the form of cracks and peeling were observed, which are associated with the course of physical and chemical processes of sorption and diffusion of an aggressive environment. In addition, such coatings are characterized by a tendency to overgrowth with green algae of the genus Spirogyra. For the coatings containing a rational combination of two fillers, the absence of defects and biological fouling was observed.

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“…The authors [10][11][12][13][14][15] have demonstrated that using polymer CMs substantially enhances the physical and mechanical properties and the wear resistance of transportation components exposed to aggressive environments. Consequently, this significantly extends the service life of mechanisms and machines, contributing to their reliability [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Transport Reliability: Exploring the Creep of Eco-Friendly Polymer Nanocomposites

Buketov,

Dyadyura,

Strelchenko

et al. 2023

J. Nano- Electron. Phys.

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The paper presents research results on the creep of polymer composites containing organic tissues. It discusses the technology of forming functional polymer composites and protective coatings based on them, which exhibit enhanced operational characteristics for protecting means of transport. To create polymer materials, epoxy resin ED-20 was polymerized with the polyethylene polyamine (PEPA) hardener in the following ratio: ED-20 epoxy oligomer -100 % and PEPA hardener -10 %. In addition, to enhance the properties of epoxy composites and protective coatings, a nanofiller in the form of diaminoazobenzene carboxylic acid was incorporated into the binder. Micro-disperse fillers and organic tissues were also introduced. A synthesized powder titanium-aluminum charge was utilized as a microdispersion filler for experimental studies. The formation of the filler was achieved through high-voltage electric discharge synthesis, resulting in the production of high-modulus compounds such as Ti, Al3Ti, and Ti3AlC2. Fabrics based on organic fibers were additionally used as fillers. Cotton fabrics with a thickness of h  1.5...2.0 mm and linen fabrics with a thickness of h  1.5...1.7 mm were employed in this study.

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Experimental Investigation on Tribological Characteristics of NaOH Treated Chopped Abaca Fiber Reinforced Epoxy Composites

Cited by 10 publications

References 22 publications

Functional Polymer Nanocomposites with Increased Anticorrosion Properties and Wear Resistance for Water Transport

Functional Polymer Nanocomposites with Increased Anticorrosion Properties and Wear Resistance for Water Transport

Corrosion-Resistant Epoxy Coatings Filled with Nanoparticles of Vegetable Origin to Protect Water Vehicles

Sustainable Transport Reliability: Exploring the Creep of Eco-Friendly Polymer Nanocomposites

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