Bio-based epoxidized natural rubber/chitin nanocrystals composites: Self-healing and enhanced mechanical properties

Nie, Jiada; Mou, Wenjie; Ding, Jianping; Chen, Yukun

doi:10.1016/j.compositesb.2019.04.035

Cited by 104 publications

(55 citation statements)

References 53 publications

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“…The same scientific group also created self-healable epoxidized natural rubber/carboxymethyl chitosan bio-based composites with improved mechanical properties and self-healing efficiency of 90% at room temperature [30]. The high healing efficiency at ambient temperature without any external stimuli was also achieved by Nie et al [28], who made bio-based composites of ENR and chitin nanocrystals containing a hydrogen bonding supramolecular network. Nevertheless, these composites had a low tensile strength of about 1.19 MPa and therefore were next filled with carbon nanotubes [31].…”

Section: Introductionmentioning

confidence: 93%

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Self-Healable Biocomposites Crosslinked with a Combination of Silica and Quercetin

2021

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In this publication, novel bio-based composites made of epoxidized natural rubber with 50 mol% of epoxidation (ENR-50) are presented. The obtained materials, partially cured with a totally environmentally friendly crosslinking system consisting of natural ingredients, including quercetin and silica, exhibit a self-healing ability resulting from the self-adhesion of ENR-50 and reversible physical forces between the curing agent and the matrix. The impact of natural components on the crosslinking effect in uncured ENR-50 matrix was analyzed based on rheometric measurements, mechanical tests and crosslinking density. The partially crosslinked samples were next cut into two separate pieces, which were instantly contacted together under a small manual press, left at room temperature for a few days for the healing process to occur and finally retested. The healing efficiency was estimated by measuring mechanical properties before and after the healing process and was also confirmed by photos taken using optical and scanning electron microscope (SEM). According to the results, a combination of silica and quercetin is a totally safe, natural and effective crosslinking system dedicated to epoxidized natural rubber. The novel composites containing ingredients safe for human beings exhibit promising self-healing properties with a healing efficiency of up to 45% without any external stimuli and stand a chance of becoming innovative biomedical materials.

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Section: Introductionmentioning

confidence: 93%

“…Such materials can reveal self-healing ability under external stimuli, including increased temperature, where exchanging reactions are conducted [ 24 , 25 , 26 , 27 ]. On the other hand, some ENR-based composites are able to self-repair without any stimulus [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Self-Healable Biocomposites Crosslinked with a Combination of Silica and Quercetin

2021

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“…They explained that chitin nanocrystals reacted with the epoxy group of ENR and formed hydrogen bonds resulting in the formation of supramolecular network. This structure could effectively enhance the mechanical properties along with superior self-healing capacity [77].…”

Section: Mechanical Properties Of Nanochitin Compositesmentioning

confidence: 99%

Extraction of Nanochitin from Marine Resources and Fabrication of Polymer Nanocomposites: Recent Advances

Joseph

Sam²,

Balakrishnan

et al. 2020

Polymers

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Industrial sea food residues, mainly crab and shrimp shells, are considered to be the most promising and abundant source of chitin. In-depth understanding of the biological properties of chitin and scientific advancements in the field of nanotechnology have enabled the development of high-performance chitin nanomaterials. Nanoscale chitin is of great economic value as an efficient functional and reinforcement material for a wide range of applications ranging from water purification to tissue engineering. The use of polymers and nanochitin to produce (bio) nanocomposites offers a good opportunity to prepare bioplastic materials with enhanced functional and structural properties. Most processes for nanochitin isolation rely on the use of chemical, physical or mechanical methods. Chitin-based nanocomposites are fabricated by various methods, involving electrospinning, freeze drying, etc. This review discusses the progress and new developments in the isolation and physico-chemical characterization of chitin; it also highlights the processing of nanochitin in various composite and functional materials.

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“…More recently, there has been a growing focus on self-healing materials based on commercial rubber (eg, natural rubber, [16][17][18] styrene-butadiene rubber, 19 and styrene-butadiene 20,21 epoxidized natural rubber 22 ). According to Das, 23 2,6-diaminopyridine and metal salts were introduced into carboxylated nitrile-butadiene rubber (XNBR).…”

Section: Introductionmentioning

confidence: 99%

A conductive rubber with self‐healing ability enabled by metal‐ligand coordination

Xiong

Gong

Ding

et al. 2021

Polymers for Advanced Techs

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At present, flexible conductive materials have been widely noticed. However, developing electronic materials with both good mechanical and electrical self-healing abilities remains both a great challenge and an exciting goal. Herein, we prepared a commercial nitrile butadiene rubber (NBR) with electrical healing capability based on constructing Fe(III) coordination and CNT networks. With 3 phr (parts per hundreds of rubber) CNT, the tensile strength and the elongation at break of rubber composite reached 1.1 MPa and 300%, respectively. After healing at 80 C for 9 hours, the recovery efficiency of rubber composite achieved 90%. After adding 5 phr CNT, the conductivity can reach 0.077 S/m, and the electrical conductivity was 0.076 S/m after self-healing. Such material can maintain resistance change within 5 times at high strain (100%), so it is applicable in the field of strain sensor.

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Bio-based epoxidized natural rubber/chitin nanocrystals composites: Self-healing and enhanced mechanical properties

Cited by 104 publications

References 53 publications

Self-Healable Biocomposites Crosslinked with a Combination of Silica and Quercetin

Self-Healable Biocomposites Crosslinked with a Combination of Silica and Quercetin

Extraction of Nanochitin from Marine Resources and Fabrication of Polymer Nanocomposites: Recent Advances

A conductive rubber with self‐healing ability enabled by metal‐ligand coordination

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