Self‐Healing Green Polymers and Composites

Kim, Joo Ran; Netravali, Anil N.

doi:10.1002/9781119323327.ch7

Cited by 7 publications

(17 citation statements)

References 146 publications

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“…Though at present, application of green composite is limited to interior and non-load bearing applications 97,237,241 due to insufficient mechanical performance and short service life in outdoor applications 98 but future research and further exploration of bio-resins, biofibers, customized modification, and processing techniques would make it feasible alternative for replacing environmentally hazardous synthetic composites. The invention of cellulose fiber with strength 1500–1700 MPa, Young’s modulus of about 40 GPa, 254 and development of green composite with strength around 800 MPa and modulus of over 30 GPa with just 55% Liquid Crystalline Cellulose (LCC) fiber volume, 236 transparent green composites, 260 successful insertion of self-healing property against micro-cracks for preventing premature failure 236,254,261 are some of the already achieved advancements.…”

Section: Challenge and Prospectsmentioning

confidence: 99%

Green composites from natural fibers and biopolymers: A review on processing, properties, and applications

Islam

Sarker

Rahman

et al. 2022

Journal of Reinforced Plastics and Composites

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At present, environmental sustainability is a big concern due to the limited resources and the adverse impacts of petroleum-based materials. Green composites (GCs) attracted intensive research interest for the last few decades from academicians, scientists, researchers, and practitioners both from the ecological and economic point of view and are presently being considered as one of the most promising research domains. Composites produced from renewable and/or natural resources thanks to their biodegradability and sustainability properties are envisaged as the next-generation materials to meet the growing demand worldwide. GCs are intensively investigated due to their multifunctional properties and utilization in a wide variety of fields including automobile, marine, aerospace, structural and infrastructural applications, packaging, electronics industry, sports, and biomedical applications. They also show potentials to replace the expensive as well as non-degradable petroleum-based composites. After the shelf life, it can be disposed of easily without harming the environment. The processing techniques, properties, and applications of green composites are comprehensively assessed in this review article. The feasibility of the naturally available fiber and polymers for green composites are also discussed highlighting the existing challenges with possible suggestions. It was intended to present a full overview of biodegradable polymer composites reinforced with natural fiber, as well as the necessary future directions for the concerned researchers.

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Section: Challenge and Prospectsmentioning

confidence: 99%

Green composites from natural fibers and biopolymers: A review on processing, properties, and applications

Islam

Sarker

Rahman

et al. 2022

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

show abstract

“…The discharged healant reacts with the cross-linker or hardener contained in the matrix/polymer. Consequently, with the existence of the cross-linking reaction and the healant, the polymer will usually be able to recover some of its mechanical, geometric, or appearance properties, at least partially. ,, The schematic of the capsule-based self-healing system is illustrated in Figure . The self-healable composite consists of the microencapsulated catalyst with a phase-separated healant embedded in a matrix.…”

Section: Self-healing Materials and Mechanismmentioning

confidence: 99%

“…In situ interfacial and sol–gel polymerizations are chemical techniques that involve meeting two reaction components at the emulsion interface and undergoing polycondensation promptly. Microcapsules have been fabricated using physical processes, such as centrifugal extrusion, coating, solvent evaporation, polymer extrusion, spray drying, and without a chemical reaction at the interface . In self healing, interfacial and in situ polymerization are the amplest techniques for encapsulation, which provides high control over capsule parameters such as shape, size, content, and mechanical properties .…”

Section: Self-healing Materials and Mechanismmentioning

confidence: 99%

“…There are three types of microcapsule systems present: single microcapsule system, dual microcapsule system, and multilayer microcapsule system (Figure ). In a single microcapsule system, the healant or catalyst is dispersed uniformly in the resin via microcapsules . The single capsule self-healing system comprises only a single kind of encapsulated healant (monomer).…”

Section: Self-healing Materials and Mechanismmentioning

confidence: 99%

“…Following materials’ cracking, a healing reaction is induced by catalyst dispersed in the matrix . Dual microcapsules system require separate compartmentalization of the active liquid cross-linking agent (a catalyst or hardener) and healant . A multilayer microcapsule system facilitates multiple layers of all the necessary components, such as catalyst, cross-linking agents, and healing agents, in a sole capsule …”

Section: Self-healing Materials and Mechanismmentioning

confidence: 99%

See 2 more Smart Citations

Self-Healing Nanofibers for Engineering Applications

Chaudhary

Kandasubramanian

2022

Ind. Eng. Chem. Res.

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The development of emerging technologies in a wide variety of distinct fields requires continuous innovation and implementation to advance civilization. The goal of this scientific scheme is to find smart technological materials. Recent years have seen an increase in attention to electrospinning, an electrostatic fiber fabrication method, owing to its flexibility and possibility of utilizing it in the fields of manufacturing, biomedical, textile, and aerospace industry. Similarly, self-healing materials have fascinated many researchers recently due to their effectiveness in improving the durability of materials and products. The concept of self-healing is a fresh perspective for advanced and responsive materials. They can be fabricated to mimic the healing ability of biological organisms, and therefore, can automatically and instantly repair damaged parts. Integrating electrospun nanofiber (0.01 to 10 μm diameter range) with a self-healing mechanism is applicable in various engineering applications. Core/shell nanofibers have been recently used in advanced composites to induce self-healing and to enhance material reinforcement.

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Diels‐Alder Macromolecular Networks in Recyclable, Repairable and Reprocessable Polymer Composites for the Circular Economy – A Review

Griffini

Rigatelli

Turri

2023

Macro Materials & Eng

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In the expanding field of high‐performance materials, polymer‐based thermoset composites play an important role due to their favorably‐high strength/weight ratio and their mechanical performance, thermal stability, and chemical resistance. However, their chemically‐crosslinked nature hampers their re‐processability and efficient recyclability, thus making them not compliant with the principles of the circular economy and of end‐of‐life valorization. Dynamic covalent polymers able to modify their network topology upon thermal stimulus can be considered valid alternatives to commonly used thermosets as they offer advantages in terms of recyclability and reusability, normally not achievable with conventional cross‐linked systems. Within the broad field of dynamic polymers, thermally‐triggered Diels‐Alder based materials represent reliable platforms with enormous technological and industrial potential as repairable, reusable and recyclable matrices in composites given their chemical versatility, suitable mechanical performance and ease of production and processing. In this review, a comprehensive discussion of the most recent demonstrations of the reversibility, reprocessability and recyclablability of such systems is provided, in the context of their use as polymer matrices in composites. It is hoped that this work will stimulate further discussion and research in the area of reversible polymer composites with increased functionality and extended lifetime, in view of their application in future circular economy scenarios.

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Self‐Healing Green Polymers and Composites

Cited by 7 publications

References 146 publications

Green composites from natural fibers and biopolymers: A review on processing, properties, and applications

Green composites from natural fibers and biopolymers: A review on processing, properties, and applications

Self-Healing Nanofibers for Engineering Applications

Diels‐Alder Macromolecular Networks in Recyclable, Repairable and Reprocessable Polymer Composites for the Circular Economy – A Review

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