An experimental investigation on performances recovery of glass fiber reinforced composites exposed to a salt-fog/dry cycle

Fiore, Vincenzo; Calabrese, Luigi; Miranda, R.; Badagliacco, Dionisio; Sanfilippo, Carmelo; Palamara, Davide; Valenza, A.; Proverbio, E.

doi:10.1016/j.compositesb.2023.110693

Cited by 8 publications

(4 citation statements)

References 59 publications

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“…Glass fiber composites are widely recognized for their excellent characteristics, rendering them indispensable in diverse applications. The materials commonly demonstrate a tensile strength that spans from 34 to 72 MPa, along with a high modulus of elasticity that normally ranges from 0.34 to 0.76 GPa 9 . In addition, these composite materials exhibit exceptional resilience to environmental influences, characterized by a relatively low coefficient of thermal expansion of around 5.5 × 10 −6 per degree Celsius.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of glass/madar fibers reinforced hybrid epoxy composite: a comprehensive study on the material stability

Raja,

Yuvarajan,

Ali

et al. 2024

Sci Rep

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The present study aims to examine the characteristics of a composite material composed of glass/madar fibers and porcelain particles, which are reinforced with epoxy. A compression molding technique achieves the fabrication of this composite. A comprehensive characterization was conducted by employing a mixture of analytical techniques, including X-ray Diffraction (XRD), mechanical testing, Scanning Electron Microscopy (SEM), Dynamic Mechanical Analysis (DMA), and Thermogravimetric Analysis (TGA). The composition of the composite was determined using X-ray diffraction (XRD) analysis, which demonstrated the successful integration of porcelain fillers. The material exhibited notable mechanical properties, rendering it appropriate for utilization in structural applications. The utilization of SEM facilitated the examination of the microstructure of the composite material, thereby providing a deeper understanding of the interactions between the fibers and the matrix. DMA results revealed the glass/madar composite contained 4.2% higher viscoelastic properties when the addition of porcelain filler, thermal stability was improved up to the maximum temperature of 357 °C. This study provided significant insights into the properties of a hybrid epoxy composite consisting of glass/madar fibers reinforced porcelain particles.

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Section: Introductionmentioning

confidence: 99%

Fabrication of glass/madar fibers reinforced hybrid epoxy composite: a comprehensive study on the material stability

Raja,

Yuvarajan,

Ali

et al. 2024

Sci Rep

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“…It has been proved that the hygrothermal environment in which composite materials are situated will adversely affect their properties [ 7 , 8 , 9 , 10 ]. Reports further point out that such adverse effects include reduced plasticization, a lower glass transition temperature (Tg), creep, increased stress relaxation, reduced mechanical strength, and a reduced elastic modulus [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation of the Mechanism of Hygrothermal Aging and Low-Velocity Impact Performance of Resin Matrix Composites

Zhang,

Yan,

Wang

et al. 2024

Polymers

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Resin matrix composites (RCs) have better thermal and chemical stability, so they are widely used in engineering fields. In this study, the aging process and mechanism of two different types of resin-based three-dimensional four-way braided composites (H15 and S15) under different hygrothermal aging conditions were studied. The effect of aging behavior on the mechanical properties of RCs was also studied. Three different aging conditions were studied: Case I, 40 °C Soak; Case II, 70 °C Soak; and Case III, 70 °C-85% relative humidity (RH). It was found that the hygroscopic behavior of RCs in the process of moisture-heat aging conforms to Fick’s second law. Higher temperatures and humidity lead to higher water absorption. The equilibrium hygroscopic content of H15 was 1.46% (Case II), and that of S15 was 2.51% (Case II). FT-IR revealed the different hygroscopic mechanisms of H15 and S15 in terms of aging behavior. On the whole, the infiltration behavior of water molecules is mainly exhibited in the process of wet and thermal aging. At the same time, the effect of the aging process on resin matrices was observed using SEM. It was found that the aging process led to the formation of microchannels on the substrate surface of S15, and the formation of these channels was the main reason for the better moisture absorption and lower mechanical strength of S15. At the same time, this study further found that temperature and oxygen content are the core influences on post-aging strength. The LVI experiment also showed that the structural changes and deterioration effects occurring after aging reduced the strength of the studied material.

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“…To improve the properties of polymers, including those based on epoxy, plasticizers and fillers are introduced into the oligomer [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. It should be noted that the introduction of modifiers is promising, since such additives with a small content (1–5%) allow a significant increase in the indicators of adhesive and cohesive strength of epoxy composites [ 10 , 13 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ]. The latter, in turn, should be used in the form of matrices for protective coatings of working parts, including during their repair in voyage conditions of sea and river transport vessels.…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of the direction of publications researching the properties of epoxy CMs indicates the need to introduce synthesized oxide or carbide fillers into the oligomer to obtain materials with increased operational characteristics. It is proven [ 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ] that the introduction of dispersed particles into the resin, even in small quantities, ensures a change in the speed of the course of the physicochemical processes during the structure formation of CM. Moreover, not only the chemical and physical nature but also the content and dispersion of the particles are important in regulating the crosslinking processes of epoxy CMs.…”

Section: Introductionmentioning

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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An experimental investigation on performances recovery of glass fiber reinforced composites exposed to a salt-fog/dry cycle

Cited by 8 publications

References 59 publications

Fabrication of glass/madar fibers reinforced hybrid epoxy composite: a comprehensive study on the material stability

Fabrication of glass/madar fibers reinforced hybrid epoxy composite: a comprehensive study on the material stability

An Experimental Investigation of the Mechanism of Hygrothermal Aging and Low-Velocity Impact Performance of Resin Matrix Composites

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

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