Exploring various metal-ligand coordination bond formation in elastomers: Mechanical performance and self-healing behavior

Das, Mithun; Pal, Sanjay Kumar; Naskar, Kaushik

doi:10.3144/expresspolymlett.2020.71

Cited by 33 publications

(29 citation statements)

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“…This metal‐coordination system showed very high self‐healing efficiencies of 100% and 88% for zinc and cobalt systems, respectively, after heating for 24 h at 80 °C with 4 phr loading of metals. [ 54 ] A graphical comparison (Figure S11, Supporting Information) has been added to evaluate the improvement in the present synthesized dual XNBR system. In the present dual systems, we obtained a maximum tensile strength of about 10.00 MPa with a maximum self‐healing efficiency of 88%.…”

Section: Resultsmentioning

confidence: 99%

Dual‐Responsive Self‐Healable Carboxylated Acrylonitrile Butadiene Rubber Based on Dynamic Diels–Alder “Click Chemistry” and Disulfide Metathesis Reaction

Sarkar

Banerjee

Singha

2021

Macro Materials & Eng

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Introduction of the self‐healing property in the commercially available elastomers promotes the development of high‐end elastomeric products with an extended lifespan. Herein, a smart functionalized carboxylated nitrile rubber (XNBR) is prepared based on dynamic phototriggered disulfide metathesis and thermoreversible Diels–Alder (DA) “click chemistry.” In this case, the XNBR is functionalized with furfuryl amine (FA) followed by crosslinking with a dual functional crosslinker having a maleimide as well as a disulfide functionality for participating in the DA reaction and to induce the UV‐triggered disulfide metathesis reaction, respectively. The self‐healing properties are studied by thermal, mechanical, and microscopy analyses. The crosslinked materials present an impressive self‐healing efficiency of ≈88% and a tensile strength of ≈10 MPa without affecting its oil‐resistance property whereas pristine XNBR and furfuryl‐functionalized XNBR (FXNBR) show tensile strengths only 0.4 and 0.6 MPa, respectively. Furthermore, the crosslinked rubber is demonstrated to be recyclable, without much loss of its mechanical properties. In a nutshell, the use of this smart dual pathway of self‐healing can pave a new direction in sustainable development in NBR elastomers.

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Section: Resultsmentioning

confidence: 99%

Dual‐Responsive Self‐Healable Carboxylated Acrylonitrile Butadiene Rubber Based on Dynamic Diels–Alder “Click Chemistry” and Disulfide Metathesis Reaction

Sarkar

Banerjee

Singha

2021

Macro Materials & Eng

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“…During the self-healing study, different healing conditions, like temperature and pressure, were optimized for better self-healing efficiency. 15 …”

Section: Measurement Of Self-healing Efficiencymentioning

confidence: 99%

“…Das et al 15 utilized the combination of 2,6-diaminopyridine (DAP) and metal salts for the design of self-healable carboxylated nitrile rubber (XNBR) composites. In this study, three types of metal salts, namely, cobalt(II) nitrate hexahydrate, nickel(II) nitrate hexahydrate, and zinc(II) nitrate hexahydrate, were used to produce a metal–ligand coordination bond in XNBR composites.…”

Section: Different Strategies For the Preparation Of Self-healable Nbr Compositesmentioning

confidence: 99%

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Review on the Conceptual Design of Self-Healable Nitrile Rubber Composites

et al. 2021

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The search for suitable strategies to manufacture self-healable nitrile rubber (NBR) composites is the most promising part in the industrial field of polar rubber research. In recent years, some important strategies, specifically, metal–ligand coordination bond formation, ionic bond formation, and dynamic hydrogen bond formation, have been utilized to develop duly self-healable NBR composites. This paper reviews the continuous advancement in the research field related to self-healable NBR composites by considering healing strategies and healing conditions. Special attention is given to understand the healing mechanism in reversibly cross-linked NBR systems. The healing efficiency of a cross-linked NBR network is usually dependent on the definite interaction between functional groups of NBR and a cross-linking agent. Finally, the results obtained from successful studies suggest that self-healing technology has incredible potential to increase the sustainability and lifetime of NBR-based rubber products.

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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). It exhibited high tensile strength (4.3 MPa) and high elongation at break (1560%), and the healing efficiency can reach 100% at 80 C for 24 hours.…”

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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Exploring various metal-ligand coordination bond formation in elastomers: Mechanical performance and self-healing behavior

Cited by 33 publications

References 0 publications

Dual‐Responsive Self‐Healable Carboxylated Acrylonitrile Butadiene Rubber Based on Dynamic Diels–Alder “Click Chemistry” and Disulfide Metathesis Reaction

Dual‐Responsive Self‐Healable Carboxylated Acrylonitrile Butadiene Rubber Based on Dynamic Diels–Alder “Click Chemistry” and Disulfide Metathesis Reaction

Review on the Conceptual Design of Self-Healable Nitrile Rubber Composites

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

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