Mechanically strong, healable, and reprocessable conductive carbon black/silicone elastomer nanocomposites based on dynamic imine bonds and sacrificial coordination bonds

Bai, Lu; Yan, Xingxing; Feng, Bingwei; Jiao, Zheng

doi:10.1016/j.compositesb.2021.109123

Cited by 36 publications

(22 citation statements)

References 51 publications

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“…These values are far superior to other reported silicone elastomers (with a maximum strength of 5 MPa) (Fig. 2d), 19,23,24,30,36,53–59 and even better than silicone/polyurethane composites that are prepared via tedious and elaborate synthesis. 26,60,61 The toughness of this designed elastomer can reach 25–28 MJ m −3 , which is higher than the reported values of ∼5 MJ m −3 and ∼16 MJ m −3 for silicone elastomers.…”

Section: Resultscontrasting

confidence: 58%

“…26,60,61 The toughness of this designed elastomer can reach 25-28 MJ m À3 , which is higher than the reported values of $5 MJ m À3 and $16 MJ m À3 for silicone elastomers. 24,30 In addition, PDETAS can be obtained via a simple one-pot method and the elastomer is easily created upon thermo-crosslinking PDETAS with cheap FBA as a crosslinker, which is similar to the conventional vulcanization technology used for silicone rubber. Hence, this fabrication pathway is much more facile, ensuring the potential for largescale application.…”

Section: Resultsmentioning

confidence: 99%

“…[27][28][29] Some dynamic bonds have already endowed polysiloxane elastomers with good reprocessability via the remolding of fragments or powder. 30,31 However, it is still difficult to redissolve these elastomers due to the restrictions of dynamic covalent bonds, making it unfeasible to separate and recycle elastomer matrices and electronic components. [32][33][34] Dynamic noncovalent bonds support re-dissolvability and recyclability, but they oen result in structural instability and weak mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dual-crosslinking side chains with an asymmetric chain structure: a facile pathway to a robust, self-healable, and re-dissolvable polysiloxane elastomer for recyclable flexible devices

et al. 2022

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Section: Resultscontrasting

confidence: 58%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dual-crosslinking side chains with an asymmetric chain structure: a facile pathway to a robust, self-healable, and re-dissolvable polysiloxane elastomer for recyclable flexible devices

et al. 2022

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“…Another reprocessable conductive polymer composite (CPC) was fabricated by doping CB and ZnCl 2 into iminecross-linked PDMS networks to achieve dual cross-linking of imine bonds and Zn(II)-amino coordination bonds in networks. 110 The tensile strength and modulus were improved with an increased CB loading, as CB could form a jointnetwork with polymer chains by physical adsorption. The electrical conductivity of the composite was also enhanced with the increase of CB content due to the narrowed distance of conductive nanofillers.…”

Section: ■ Cans As a Matrix For Nanocompositesmentioning

confidence: 99%

Nanotechnology in Covalent Adaptable Networks: from Nanocomposites to Surface Patterning

Wang

Zheng

et al. 2023

ACS Materials Lett.

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Cross-linked polymers with dynamic covalent linkages that can exchange and/or reversibly cleave and reformed in response to external stimuli are known as covalent adaptable networks (CANs). These polymeric materials can be recycled and reprocessed like thermoplastics while retaining excellent mechanical characteristics, thermal stability, and chemical stability of classic thermosets. As a result of their ability to provide the benefits of both thermosets and thermoplastics, CANs have received considerable attention over the past two decades. Nanotechnology has been embodied into CANs in recent years, including nanocomposites and surface patterning. The use of nanotechnology can effectively improve thermal and mechanical properties of CANs, endow CANs with new functions (e.g., electrical properties, photothermal effects, surface properties, and optical behaviors) and enable CANs to be used in smart and functional materials. The purpose of this review is to provide a brief summary of current methods used to construct CANs with the help of nanotechnology and to explain how they work and their improvements over conventional CANs. A brief overview of CANs with various dynamic bonds and features is presented. Then, we will provide a summary of the benefits of integrating nanotechnology in CANs by highlighting its formation methods, functionalities, and applications.

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“…Functional repairing structures can be categorized as noncovalent and covalent systems. 5 The former includes hydrogen bond, 6 ionic bond, 7 coordination bond, 8 π-π interaction, 9 hydrophilic and hydrophobic interaction, 10 van der Waals force, donor-receptor interaction, dipole interaction, ion-pair electrostatic interaction and so on. The latter includes Diels-Alder bond, 11 disulfide bond, 12 transesterification, 13 hydrazone bond, 14 borate bond, 15 alkoxy amine reaction, 16 olefin metathesis reaction, 17 siloxane, 18 thiol nanoparticle exchange, and so on.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of silicon‐containing groups on the self‐healing performance of polyurethanes based on disulfide bonds

Lou

Yang

Tao

et al. 2022

J of Applied Polymer Sci

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Self-healing polyurethanes (PUs) with disulfide bonds and diphenyl silicon groups involved in the soft phases were prepared and studied in this work. The self-healing efficiencies of PUs are greatly improved by the synergistic effect of diphenyl silicon groups with low surface energy-increasing the distance between two polymer chains, enhancing the mobility of polymer chains, and promoting the migration of sulfur-containing groups to the damaged sites. The analysis of activation energy for the movement of polymer chains based on dynamic mechanical thermal analysis shows that, the higher contents of disulfide bonds and diphenyl silicon groups, the stronger mobility of polymer chains, and the higher self-healing performance of PUs. The study of temperature and time dependencies for the healing process at damaged sites indicates that it is composed of the recombination of disulfide bonds and the interpenetration and intertwining of polymer chains. The former can be completed in a shorter time, while the latter in a longer time. Sufficient time of heat treatment at relatively high temperature is necessary to get high self-healing efficiency. This strategy and the relative results are instructive to design and development of self-healing PUs.

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Mechanically strong, healable, and reprocessable conductive carbon black/silicone elastomer nanocomposites based on dynamic imine bonds and sacrificial coordination bonds

Cited by 36 publications

References 51 publications

Dual-crosslinking side chains with an asymmetric chain structure: a facile pathway to a robust, self-healable, and re-dissolvable polysiloxane elastomer for recyclable flexible devices

Dual-crosslinking side chains with an asymmetric chain structure: a facile pathway to a robust, self-healable, and re-dissolvable polysiloxane elastomer for recyclable flexible devices

Nanotechnology in Covalent Adaptable Networks: from Nanocomposites to Surface Patterning

Synergistic effect of silicon‐containing groups on the self‐healing performance of polyurethanes based on disulfide bonds

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