Glass fiber-reinforced polymer composites – a review Sathishkumar, TP; Satheeshkumar, S; Naveen, J
Journal of Reinforced Plastics and Composites,
07/2014, Letnik:
33, Številka:
13
Book Review, Journal Article
Recenzirano
Glass fibers reinforced polymer composites have been prepared by various manufacturing technology and are widely used for various applications. Initially, ancient Egyptians made containers by glass ...fibers drawn from heat softened glass. Continues glass fibers were first manufactured in the 1930s for high-temperature electrical application. Nowadays, it has been used in electronics, aviation and automobile application etc. Glass fibers are having excellent properties like high strength, flexibility, stiffness and resistance to chemical harm. It may be in the form of roving’s, chopped strand, yarns, fabrics and mats. Each type of glass fibers have unique properties and are used for various applications in the form of polymer composites. The mechanical, tribological, thermal, water absorption and vibrational properties of various glass fiber reinforced polymer composites were reported.
Rapidly increasing packaging density of electronic devices puts forward higher requirements for thermal conductivity of glass fibers reinforced polymer (GFRP) composites, which are commonly used as ...substrates in printed circuit board. Interface between fillers and polymer matrix has long been playing an important role in affecting thermal conductivity. In this paper, the effect of interfacial state on the thermal conductivity of functionalized Al2O3 filled GFRP composites was evaluated. The results indicated that amino groups-Al2O3 was demonstrated to be effective filler to fabricate thermally conductive GFPR composite (1.07W/mK), compared with epoxy group and graphene oxide functionalized Al2O3. It was determined that the strong adhesion at the interface and homogeneous dispersion of filler particles were the key factors. Moreover, the effect of interfacial state on dielectric and thermomechanical properties of GFRP composites was also discussed. This research provides an efficient way to develop high-performance GFRP composites with high thermal conductivity for integrated circuit packaging applications.
The growing use of carbon and glass fibres has increased awareness about their waste disposal methods. Tonnes of composite waste containing valuable carbon fibres and glass fibres have been ...cumulating every year from various applications. These composite wastes must be cost-effectively recycled without causing negative environmental impact. This review article presents an overview of the existing methods to recycle the cumulating composite wastes containing carbon fibre and glass fibre, with emphasis on fibre recovery and understanding their retained properties. Carbon and glass fibres are assessed via focused topics, each related to a specific treatment method: mechanical recycling; thermal recycling, including fluidised bed and pyrolysis; chemical recycling and solvolysis using critical conditions. Additionally, a brief analysis of their environmental and economic aspects are discussed, prioritising the methods based on sustainable values. Finally, research gaps are identified to highlight the factors of circular economy and its significant role in closing the life-cycle loop of these valuable fibres into re-manufactured composites.
Glass fiber‐reinforced composites (GFRC), widely applied in the automobile, aerospace, domestic appliance, sport equipment, and other fields, are indispensable in modern society. In this article, ...conductive nanocarbon‐coated glass fibers (NCGFs) were hybridized with suitable polymers for the fabrication of new composite materials. NCGFs have good dispersion and interfacial interactions within polypropylene matrices. The electrical conductivity of a nanocarbon‐coated glass fibers‐reinforced composite (NCGFRC) was increased 108 times more than that of a pure polymer, which provided the NCGFRC with an electromagnetic shielding efficiency (8.2–12.4 GHz) of 22 dB. At the same time, the thermal conductivity of NCGFRC was also improved. NCGFRC will expand the types of GFRC available and further expand the application of GFRC into other fields.
As the global demand for wind power continues to increase, there is growing concern about the disposal of waste wind turbine blades, which are predominantly composed of glass fiber-reinforced polymer ...composites. This review provides an overview of recent advancements in the recovery of glass fibers from waste wind turbines, examining various recycling techniques including mechanical recycling, pyrolysis, combustion, and chemical solvolysis. Additionally, the review assesses the impact of each technique on the properties of the recovered glass fibers and explores potential secondary applications for these fibers. Notably, the review emphasizes the significant impact of recycling methods on the characteristics of recovered glass fibers and establishes meaningful connections among recycling approaches, fiber properties, and potential applications. Furthermore, the review offers insights into future research directions and technological advancements needed to address current challenges in this field. The objective of this review is to advance knowledge and technology for addressing waste wind turbine blades and promoting the sustainable utilization of recovered glass fibers.
•Several methods for recovering glass fibers from waste turbine blades are outlined.•Recycling methods strongly affect the properties of recovered glass fibers.•Pyrolysis and chemical solvolysis are currently the two most promising methods.•Relations of recycling methods, fiber features, and potential reuses are obtained.•The reutilization of recovered fibers needs to break free from traditional fields.
Heterogeneous silicone rubber (VMQ)/silver plated glass fiber (Ag@GF)/multiwalled carbon nanotubes (MWCNT)/ferroferric oxide (Fe3O4) composite foams with gradient porous structure were fabricated ...through layer by layer combination and supercritical carbon dioxide (scCO2) foaming. The average electromagnetic interference shielding effectiveness (EMI SE) and absorption coefficient (A) of the composite foam are as high as 78.6 dB and 0.82 respectively, because of the reasonable progressive dissipation mechanism. The resonance cancellation caused by the encounter of incident and reflected electromagnetic (EM) waves further improved the microwave absorbing performance of the foam, and an absorption ratio of up to 94% can be obtained at 7.68 GHz. Moreover, the composite foam exhibits excellent stability of EMI shielding performance under multiple bending. This composite foam has great application prospects in the field of EM protection of wearable flexible electronics, high-power instruments and the forthcoming 5th-Generation communication products.
Heterogeneous EMI shielding composite foam with gradient porous structure was prepared through layer by layer combination and scCO2 foaming. The EMI SE and absorption coefficient (A) of the composite foam were as high as 78.6 dB and 0.82 respectively, due to the selective dispersion of Ag particles and the positive gradient distribution of MWCNT. Moreover, the peak value of A (0.94) was obtained at 7.68 GHz because of the resonance cancellation of electromagnetic (EM) wave, indicating 94% of the absorbed EM wave. The composite foam also exhibits outstanding stability of EMI SE and A value under 1000 repeated bending. Display omitted
•A conductivity of up to 2809 S/m is obtained due to the effective distribution of Ag.•Positive gradient distribution of MWCNT enhanced the absorbing properties.•The EMI SE and A value of the foam are as high as 78 dB and 0.82 respectively.•EMI SE and A value can be well preserved even after 1000 times of repeated bending.•Extremely high peak of A (0.94) was observed at 7.68 GHz because of resonance.
•Impact behaviour of Hybrid Fibrous Geopolymer Composite (HFGC) is tested and investigated.•Influences of impact strength and fibre content on HFGC are addressed.•Scattered experimental impact test ...results of HFGC is analysed using Weibull distribution.•Impact energy of HFGC is analysed and modelled.
The latest research data indicates that geopolymer concrete reinforced with mono fibre has a remarkable enhancement in its impact strength and fracture toughness, which is well documented. Nevertheless, many aspects of impact behaviour of Hybrid Fibrous Geopolymer Composites (HFGC) are still unexplored, which are of primary importance for defense projects in the world. For the first time, the impact behaviour under falling weight collision of HFGC were evaluated and further analysed. The HFGC mixtures were fabricated using three different fibres viz., 5D hooked end steel, polypropylene and glass. The main parameters studied were the fibre dosage and amalgamations of different fibres. Totally seven mixes were prepared and further investigations were conducted in two phases. In the first phase, five cylindrical specimens were fabricated for each mix and tested as per the ACI committee 544 falling weight collision test recommendations. Subsequently, a comprehensive two-parameter Weibull distribution was executed to scrutinise the scattered experimental test results of cylindrical specimens and presented in terms of reliability function. In the second phase, prism specimens were fabricated and tested under the same falling weight collision. Then, an analytical model was formulated for evaluating the impact energy at failure of HFGC prism specimens and comparisons were made with experimental data. The hybridisation of the above three fibres at a certain dosage and incorporation in geopolymer composites led to an enhanced impact performance and ductility properties. Further, the obtained impact energy at failure from modelling well agrees with the experimental results. Henceforth, it is a successful research data that is presented herein which will be eminently valuable for understanding the performance of new fibrous geopolymer composites (FGC) made with hybrid fibres that which are available all over the world.
Abstract
For over 50 years, pure or doped silica glass optical fibres have been an unrivalled platform for the transmission of laser light and optical data at wavelengths from the visible to the near ...infra-red. Rayleigh scattering, arising from frozen-in density fluctuations in the glass, fundamentally limits the minimum attenuation of these fibres and hence restricts their application, especially at shorter wavelengths. Guiding light in hollow (air) core fibres offers a potential way to overcome this insurmountable attenuation limit set by the glass’s scattering, but requires reduction of all the other loss-inducing mechanisms. Here we report hollow core fibres, of nested antiresonant design, with losses comparable or lower than achievable in solid glass fibres around technologically relevant wavelengths of 660, 850, and 1060 nm. Their lower than Rayleigh scattering loss in an air-guiding structure offers the potential for advances in quantum communications, data transmission, and laser power delivery.
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