scispace - formally typeset
Search or ask a question

What is the recycling of glass fiber reinforced polymer composites? 


Best insight from top research papers

The recycling of glass fiber reinforced polymer composites involves finding ways to reuse and repurpose these materials to reduce waste. One approach is to melt the entire glass-fiber-reinforced component without size reduction, resulting in a fiber-reinforced melt that can be pressed through a nozzle to create a strand with highly oriented fibers. This strand can then be used in the production of new components through a tape-like laying process . Another method is thermal recycling, which involves subjecting the composites to different temperatures and times to reinsert the recycled fibers into a new life cycle. By testing various laminates manufactured with recycled glass fibers, it was found that recycling at 600 °C for 15 minutes resulted in a minimal loss of tensile strength, while recycling at 400 °C for 180 minutes yielded the best solution in terms of tensile and flexural strength reduction . Additionally, solvolysis in ethanol under supercritical conditions has been explored as a means of recycling fiberglass with an epoxy matrix, with promising results in terms of complete matrix removal and high residual strength of the recovered fibers .

Answers from top 4 papers

More filters
Papers (4)Insight
The paper discusses the recycling of glass fiber reinforced polymer (GFRP) waste through mechanical recycling, which has been used at an industrial scale by GFRP manufacturers.
The provided paper discusses the feasibility of recycling fiberglass with an epoxy matrix by solvolysis in ethanol under supercritical conditions. It does not specifically mention the recycling of glass fiber reinforced polymer composites.
The paper discusses the thermal recycling of glass fibre composites, which involves extracting the glass fibre from the composite material and reusing it in new laminates.
The paper presents a recycling concept for glass fiber-reinforced plastics, where the whole component is melted without size reduction. The resulting fiber-reinforced melt is pressed through a nozzle to achieve highly oriented fibers for reuse in new components.

Related Questions

Article about recycling plastic wastes?5 answersPlastic waste recycling is a critical aspect of sustainable waste management globally. Various studies emphasize the importance of recycling plastic waste due to its detrimental impact on the environment and the economy. The recycling of plastic waste presents opportunities for job creation, revenue generation, and resource conservation. In India, there are significant prospects for mechanical recycling, chemical recycling, waste-to-energy approaches, and bio-based polymers to address the plastic waste issue effectively. Additionally, research has shown that plastic waste can be repurposed as reinforcement in construction materials, offering a sustainable solution to reduce environmental damage. Thermal methods of plastic recycling are gaining importance due to regulatory restrictions on landfilling, highlighting the need for innovative recycling technologies.
What are recycling methodes for polymer matrix composites?4 answersRecycling methods for polymer matrix composites include waste minimization, repurposing, reusing, recycling, incineration, co-processing in a cement plant, and dumping in a landfill. Mechanical, thermal, and chemical recycling are the three main pathways for recycling carbon fiber reinforced polymer (CFRP) waste. Mechanical recycling is suitable for glass fiber reinforced polymer (GFRP) waste and has been used at an industrial scale by GFRP manufacturers. Chemical and thermal recycling routes are more appropriate for reclaiming carbon fibers from CFRP, where the value of reclaimed fibers is more than the cost of the recycling process. A closed-loop recycling strategy for CFRP composites using mild conditions and monoethanolamine (MEA) solvent has been developed, resulting in the successful degradation of the polymer matrix and the recycling of clean carbon fibers. Steam pyrolysis has shown high energy efficiency and can be applied on a large production scale for recycling carbon fibers. Solvolysis in amino alcohols has been studied as a method to remove the polymer matrix and obtain recovered fiberglass with properties comparable to virgin fibers. Mechanical recycling, specifically through unconventional milling processes, has been investigated as a promising method for recycling carbon fiber reinforced composites.
What are the most recent innovations in recycling of thermoplastics?5 answersRecent innovations in the recycling of thermoplastics include the development of plastic crushers as an alternative to traditional impact crushers, which reduces mechanical complexity and cost of grinding. Another innovation involves the recycling of glass fiber-reinforced plastics by melting the whole component without prior size reduction, resulting in highly oriented fibers that can be used in new components. Additionally, there is a focus on using waste thermoplastics as raw materials for product development, with an emphasis on their reprocessing to obtain new products. The use of twin screw extruders for primary and secondary recycling of thermoplastics has also been explored, with the potential to improve the mechanical characteristics of virgin and recycled thermoplastics. Furthermore, a novel recycling solution for thermoplastic composites has been implemented, involving shredding, melting, and blending of TPC offcuts.
What are some most recent innovative and recycling methods for thermoplastics?5 answersRecent innovative methods for recycling thermoplastics include primary and secondary recycling with twin screw extruders. These methods aim to improve the mechanical characteristics of both virgin and recycled thermoplastics by using different types of reinforcements. Another method involves designing and fabricating plastic crushers as an alternative to traditional impact crushers. These crushers use a double-edged blade to cut the plastic and then load it into a hopper for pressing against a mold. The use of PET materials for the blades reduces the mechanical complexity and cost of grinding. Additionally, a method for recycling thermoplastic composites (TPCs) has been implemented, which involves shredding TPC offcuts, melting, and blending them. These methods address the environmental issues associated with thermoplastic waste and offer potential solutions for managing and reusing these materials.
What are the pros and cons of recycled plastic?5 answersRecycled plastic has several pros and cons. On the positive side, recycling waste plastics can help mitigate plastic pollution and reduce the risks to human health caused by improper disposal. It also contributes to the development of tribological products like lubricating oils, providing a safer alternative to disposing of plastics in the environment. Additionally, recycling plastic can lead to the production of value-added products and materials, promoting sustainable development and green environmental protection. On the negative side, the recycling process often requires high labor costs and produces contaminated water, which can be a challenge to manage. Furthermore, there are limitations to plastic recycling, including the need for improved technologies for regeneration and recovery, as well as the relatively low percentage of plastic waste being regenerated/recycled globally.
What is the environmental impact of recycled plastic?5 answersRecycled plastic has various environmental impacts. The localization of recycling and manufacturing plastic parts through additive manufacturing can reduce energy consumption and CO2 emissions by decreasing transportation. Reusing plastic waste as concrete additives can minimize the proportion of landfills used in waste incineration and redirect plastic bottles from ending up in landfills. The use of recycled plastic biocomposites can contribute to the economy and socio-environmental aspects by reducing plastic waste and increasing recycling rates. End-of-life treatment processes such as pyrolysis and waste-to-energy are preferred over landfilling, as they have lower environmental impacts and can produce net positive energy from non-recycled plastics. Chemical recycling methods with lower energy requirements, compatibilization of mixed plastic wastes, and expanding recycling technologies to nonrecyclable polymers are being researched to improve the environmental impact of plastic recycling.

See what other people are reading

How does urbanization affect the physiochemical and biological parameters of water quality in the Little Akaki Watershed, Ethiopia?
5 answers
Urbanization in the Little Akaki Watershed, Ethiopia, significantly impacts water quality parameters. Physico-chemical analyses reveal elevated concentrations of pollutants exceeding permissible limits, with the middle segment of the Little Akaki River being more heavily polluted than the upper and lower segments. Land use changes due to urbanization lead to increased urban and forest cover at the expense of agricultural land, affecting streamflow dynamics. Additionally, urbanization contributes to environmental deterioration, with impervious surfaces causing a six-fold increase in surface runoff and heightened flooding risks. Furthermore, the upper Amerti watershed experiences deteriorated water quality due to human activities and land use changes, particularly in built-up areas. Groundwater sustainability in the Little Akaki watershed is threatened by urbanization and industrial expansion, highlighting the need for integrated groundwater management strategies.
What atropisomeric natural products have been published in the last five years?
4 answers
In the last five years, several atropisomeric natural products have been published. These include the chrysophaentins, a family of algal-derived inhibitors of bacterial cytoskeletal proteins, and the atropopeptides, a new family of ribosomally synthesized and posttranslationally modified peptides. Additionally, various bioactive compounds with axial chirality, such as C-C bonded atropisomers, C-N bonded atropisomers, and N-N bonded atropisomers, have shown significant potential for drug development. The synthesis of atropisomers has also been a focus, with advancements in preparing biaryl, heterobiaryl, and nonbiaryl atropisomers documented between 2015 and 2020. These recent publications highlight the growing interest and exploration of atropisomeric natural products in drug discovery and chemical synthesis.
What are the top 10 bibliometrics papers in Sustainable Hair Pigmentation?
4 answers
A comprehensive analysis of bibliometric studies in sustainability reveals significant trends and insights. While the focus has been on various aspects like sustainable horticulture, highly cited papers in the journal Sustainability, sustainability literature in Environment, Development and Sustainability, and education for sustainability, there is a growing interest in sustainable technology as well. These studies highlight the importance of interdisciplinary collaboration, key research clusters such as environmental sustainability and sustainable development, influential countries like China and the United States, and the need for future research opportunities in sustainability. By examining these bibliometric analyses, researchers can gain valuable insights into the current state of research in sustainability and identify areas for further exploration and collaboration.
What is heterocyclic azo ligand?
5 answers
A heterocyclic azo ligand is a type of ligand synthesized by combining heterocyclic compounds with azo groups. These ligands have been extensively studied for their coordination chemistry with various metal ions to form complexes with diverse properties. For example, studies have reported the synthesis of heterocyclic azo ligands derived from compounds like antipyrine, pyrazole, and imidazole, which have shown promising antimicrobial and anticancer activities. The coordination of these ligands with metal ions like Co(II), Cu(II), and Zn(II) has been characterized using techniques such as FT-IR, UV-Vis, and NMR spectroscopy, revealing their tridentate binding behavior and octahedral geometry in the resulting complexes. Additionally, theoretical calculations and molecular docking studies have provided insights into the structural and electronic properties of these ligands and their complexes, further highlighting their potential for future investigations.
Gut microorganisms and personality?
5 answers
The gut microbiota has been linked to personality traits and psychopathological profiles. Studies have shown that individuals with specific personality traits, such as high neuroticism, may exhibit alterations in their gut microbiota composition, impacting their behavior and mental health. Furthermore, the bidirectional relationship between the gut microbiome and brain function suggests that the gut environment can influence affect, stress responses, and even brain structure and function, ultimately affecting temperament, personality, and psychological well-being. Research on Mongolian gerbils demonstrated a significant correlation between host boldness and gut microbiota composition, indicating that gut microbiota can influence the personalities of their hosts. Overall, these findings highlight the intricate connection between gut microorganisms and personality traits, shedding light on the gut-brain axis's role in shaping behavior and mental health.
What is the minimal clinically important difference of postherpetic neuralgia?
4 answers
The minimal clinically important difference (MCID) for postherpetic neuralgia (PHN) is crucial in assessing treatment effectiveness. MCID represents the smallest change in a patient's condition that is considered meaningful. In the context of pain, MCID values can vary based on factors like pain quality, chronicity, and treatment options. Determining MCID for patient-reported outcome measures (PROMs) like the Southampton Dupuytren's scoring scheme (SDSS) involves both anchor-based and distribution-based approaches, with values of 1.5 and 1.62 points identified for SDSS in patients receiving treatment for Dupuytren's disease. It is essential to consider MCID alongside other patient-centered outcome measures like patient acceptable symptomatic state (PASS) and substantial clinical benefit (SCB) to comprehensively evaluate treatment impact on individual patients.
Can cognitive questionnaires accurately measure field independence and dependence, and how do these scores relate to other cognitive assessments?
5 answers
Cognitive questionnaires can measure field independence and dependence, but their accuracy varies. The study by Lacko et al. found that self-report questionnaires had unsatisfactory factor structures and lacked validation on independent samples, suggesting caution in their use. On the other hand, the use of methods like embedded figures and hierarchical figures was recommended for better reliability in assessing cognitive styles. Field independent individuals tend to outperform field dependent ones in creativity tasks, as shown in the study by Giancola et al.. Additionally, Nori et al. demonstrated that field independence predicted better performance in topographic memory tasks in a virtual environment, indicating a link between cognitive style and spatial memory abilities. These findings highlight the importance of considering field independence-dependence in cognitive assessments and its implications for various cognitive tasks.
How the replication fork stalls in the E. coli??
10 answers
In Escherichia coli, the replication fork can stall due to various challenges encountered during the DNA replication process. One primary cause of stalling is the presence of DNA-binding proteins that act as roadblocks to the replication fork. These proteins, bound to the template DNA, can have deleterious effects on cells by impeding the progress of the replication machinery. The accessory helicase Rep plays a crucial role in displacing these roadblocks, thereby facilitating the continuation of DNA replication despite these obstacles. Another significant factor contributing to replication fork stalling is DNA damage. Translesion synthesis (TLS) polymerases, such as Pol IV, are specialized enzymes that bypass DNA lesions blocking replicative polymerases, allowing cells to tolerate DNA damage encountered during replication. The single-stranded DNA-binding protein (SSB) enriches Pol IV at stalled replication forks in response to DNA damage, highlighting the importance of SSB in managing replication stress. Furthermore, the physical structure of the replication fork itself can lead to stalling. For instance, when fork progress is impeded, proteins such as SSB, RecG, and the RuvABC complex are required for fork rescue. In cases where the forked DNA breaks apart, the RecBCD pathway enzymes are necessary to restart replication. The powerful monomeric DNA helicase, RecG, plays a pivotal role in regressing the fork structure away from impediments, enabling repair and the resumption of DNA replication. Additionally, the functional interdependence of sister replisomes in a factory configuration suggests that blocking one replisome can significantly decrease the overall progression and velocity of its sister replisome, further illustrating how replication dynamics can influence fork stalling. The PriA-PriB pathway is essential for reloading replisomes onto prematurely terminated replication forks, indicating the complexity of replication restart mechanisms. Lastly, the activation of checkpoint pathways in response to replication fork barriers (RFBs) underscores the cellular strategies to manage fork stalling while maintaining genomic integrity. Collectively, these studies illustrate the multifaceted nature of replication fork stalling in E. coli, involving protein roadblocks, DNA damage, structural challenges of the fork, and checkpoint pathway activation.
Did the addition of slag in brick have effect in flexural strength?
5 answers
The addition of slag in brick production had varying effects on flexural strength based on different studies. Research by Liu et al. demonstrated that the addition of coal gasification slag negatively impacted the compression strength of sintered bricks, indicating a potential decrease in flexural strength. Conversely, Xing et al. found that the incorporation of silane coupling agents and water-soluble polymers improved the flexural strength of slag geopolymer paste, enhancing ductility through a toughening mechanism. Additionally, Zhu et al. observed a reduction in flexural strength of alkali slag cement mortar when replacing slag powder with fly ash, suggesting a potential decrease in flexural strength with certain admixtures. Therefore, the effect of slag addition on flexural strength can vary depending on the specific composition and production techniques used.
What are the historical roots of the concept of privacy?
10 answers
The historical roots of the concept of privacy are multifaceted and span across various dimensions including legal, architectural, cultural, and technological developments. The early modern period in Europe, notably between 1500 and 1800, is identified as a crucial phase in the evolution of modern notions of privacy, where a division between private and public spheres began to emerge, linked to the home and the body on one hand, and to surveillance on the other. This period saw the architectural manifestation of privacy through the design of closets, hallways, and separate servant quarters, reflecting a growing need for personal space. The legal right to privacy, although not formally recognized until the late 19th century with the seminal work of Warren and Brandeis, had precursors in the Victorian era where the press's prying eyes prompted discussions on the need to protect individuals' private lives. This legal evolution paralleled cultural shifts in the Victorian age, where privacy became linked to notions of selfhood and personal identity, influenced by the era's emphasis on emotion and sentiment. Technological advancements have also played a significant role in shaping the concept of privacy. The development of private telegraphy in the 19th century, for instance, was a response to the desire for private communication, illustrating early concerns over privacy in the face of new communication technologies. In the digital age, the challenges to privacy have become more pronounced, with the expansion of human activities into digital realms raising concerns about digital privacy, data rights, and internet surveillance. Culturally, the concept of privacy is both universal and diverse, reflecting a human drive to manage the boundaries of private and public that transcends social class and technological sophistication. This universality is evident in the recognition of privacy across different cultures, including Chinese culture, which values solitude, reserve, and intimacy despite differing conceptual frameworks. In summary, the concept of privacy has deep historical roots that span legal, architectural, cultural, and technological developments, reflecting a complex interplay between societal norms, individual needs, and technological advancements.
What are contact lens?
4 answers
Contact lenses are ocular prosthetic devices used for various purposes such as vision correction, therapeutics, and cosmetics. They have evolved significantly over time to minimize adverse effects and maintain corneal health. Contact lens materials include polymer- or silicone-hydrogels, with advancements in manufacturing technologies. These lenses can be therapeutic, aiding in pain relief, corneal healing, and drug delivery. They are also used as bandage lenses to protect injured corneas. Contact lenses have potential as drug delivery systems for ocular therapeutics, enhancing bioavailability and convenience. Future prospects include theranostic applications for continuous monitoring of ocular physiology. Overall, contact lenses serve a wide range of functions and continue to advance in technology and applications.