Biomimetic, recyclable, highly stretchable and self-healing conductors enabled by dual reversible bonds

Li, Kui; Xu, Zhipeng; Zhao, Songfang; Meng, Xiangying; Zhang, Ruliang; Li, Jinhui; Leng, Jinfeng; Zhang, Guoping; Cao, Duxia; Sun, Rong

doi:10.1016/j.cej.2019.04.053

Cited by 58 publications

(31 citation statements)

References 51 publications

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“…[20][21][22][23] Besides metal oxides, the -COOH groups present in the XNBR rubber can also react with other different compounds such as diamine and amino acids. [24][25][26][27] In this study, we aim to develop a dual cross-linking network in XNBR rubber by using ZnO and zwitterionic compound 28,29 Lysine (Ly) and tryptophan (Trp) are naturally occurring amino acid, which posses zwitterionic moiety along with different chemical structure, can potentially influence the formation of ionic clusters and multiplets during the cross-linking of XNBR by ZnO. ZnO and amino acid can be viewed as a primary and secondary cross-linking agent, respectively, for the XNBR rubber.…”

Section: −mentioning

confidence: 99%

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A new route of cross‐linking of carboxylated acrylonitrile‐butadiene rubber via zinc oxide‐amino acid network formation

Das

Pal

Naskar

2020

J of Applied Polymer Sci

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Herein, we present a strategy that leads to the formation of a highperformance elastomeric material based on the carboxylated acrylonitrilebutadiene rubber (XNBR). A unique cross-linking route for XNBR has been designed, which does not involve typical cross-linking agents such as sulfur. In this study, the show cause-effect of zwitterionic compounds as the secondary cross-linking agent for ionic elastomer has been investigated. Naturally occurring lysine (Ly) and tryptophan (Trp) amino acid are the zwitterionic compounds, which have been explored here. This approach results in the formation of a cross-linked ionic elastomer that houses a dual ionic network structure formed by zinc oxide (ZnO) and amino acid. XNBR cross-linked by ZnO and different amino acid compounds exhibit superior physical properties as compared to the conventional cross-linking system. Fourier transform infrared spectroscopy, transmission electron microscope, and swelling study analyzes confirm the existence of zinc-carboxylate and zwitterionic network in XNBR after the cross-linking process. The dynamic mechanical analysis, differential scanning calorimetry, and oscillating disk rheometer analyzes show various thermal relaxations and transitions present in the dual cross-linked XNBR. The ZnO and amino acid cross-linked XNBR rubber with 2.5 phr of Ly and 5 phr of Trp show the highest tensile strength of 42.4 and 39.7 MPa, respectively, which is mostly higher than the previously reported values for ionic cross-linked elastomers.

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Section: −mentioning

confidence: 99%

“…Several examples are available from investigations that many researchers have studied the XNBR rubber cured with different metal oxides 20–23 . Besides metal oxides, the ‐COOH groups present in the XNBR rubber can also react with other different compounds such as diamine and amino acids 24–27 …”

Section: Introductionmentioning

confidence: 99%

A new route of cross‐linking of carboxylated acrylonitrile‐butadiene rubber via zinc oxide‐amino acid network formation

Das

Pal

Naskar

2020

J of Applied Polymer Sci

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“…Self-healing materials are the key to cope with internal or external damage. Over the last decades, a lot of studies have focused on the field of the elastic recovery, structural restoration and functional self-healing [8,9]. In a variety of self-healable materials, the self-healing hydrogels realize ion transport while maintaining outstanding mechanical stability showing great potential as a flexible electrolyte [10].…”

Section: Introductionmentioning

confidence: 99%

Self-Healing and Highly Stretchable Hydrogel for Interfacial Compatible Flexible Paper-Based Micro-Supercapacitor

Wang

Shi

et al. 2021

Materials

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Most reported wearable electronic devices lack self-healing chemistry and flexible function to maintain stable energy output while irreversible damages and complex deformations. In this work, we report a dual-dynamic network electrolyte synthesized by micellar elastomers introduced into strong hydrogel matrix. The gel electrolyte is fabricated by physically cross-linking the borax-polyvinyl alcohol (B-PVA) network as tough matrix and poly (ethylene oxide) (PEO)-poly (propylene oxide) (PPO)-poly (ethylene oxide) (Pluronic) to frame elastic network, followed by immersion in potassium chloride solution. Under the action of dynamic borate ester bond and multi-network hydrogen bond, the as-prepared electrolyte exhibits high stretchability (1535%) and good self-healing efficiency. Based on the electrolyte, we assemble the interfacial compatible micro-supercapacitor (MSC) by multi-walled carbon nanotubes (MWCNT) interdigital electrode printed on cellulosic paper by direct ink writing (DIW) technique. Thanks to the large specific area and compressive deformation resistance of cellulosic paper, the MSC with tightly interfacial contact achieves high volumetric capacitance of 801.9 mF cm−3 at the current density of 20 μA cm−2. In the absence of stimulation of the external environment, the self-healing MSC demonstrates an ideal capacity retention (90.43%) after five physical damaged/healing cycles. Our research provides a clean and effective strategy to construct wearable MSC.

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“…For instance, polyurethanes‐based polymers showed good self‐healing properties upon heating and it is possible to use a small crosslinker presenting hydroxyl groups to improve the reversibility of the bond formation or to use the Diels‐Alder reaction which provides an excellent thermal reversibility. [ 8–10 ] Fusible thermoplastic polycaprolactone fibers or polystyrene can also be inserted into the matrix. Under the influence of heat, they will melt and flow to heal the scratch.…”

Section: Introductionmentioning

confidence: 99%

NIR Organic Dyes as Innovative Tools for Reprocessing/Recycling of Plastics: Benefits of the Photothermal Activation in the Near‐Infrared Range

Launay

Caron

Noirbent

et al. 2020

Adv Funct Materials

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Photoinduced thermal polymerization upon Near‐InfraRed (NIR) light has been recently reported in the literature as an efficient tool for polymer synthesis. In this work, a completely different approach is developed since polymeric materials containing a very low amount of a stimuli‐responsive compound are prepared by using a benchmark UV photoinitiator. As the stimuli‐responsive compound, an organic dye strongly absorbing in the near‐infrared region is selected. The heat released by its irradiation with an inexpensive and highly penetrating NIR light source allows the development of an unprecedented approach for reprocessing, reshaping, recycling, and self‐healing. Several parameters have been studied in order to determine their influence on the polymer temperature: the wavelength of the NIR irradiation, the irradiance of the NIR light source, the choice of heater (IR‐813 p‐toluenesulfonate or a squaraine dye), and the heater concentration. The thermoplastics bonding and debonding has also been studied and showed promising results since two pieces of polymers could be pasted together after a short time of NIR irradiation. Finally, self‐healing ability of the thermoplastic is investigated and furnished impressive results even for large scratches.

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Biomimetic, recyclable, highly stretchable and self-healing conductors enabled by dual reversible bonds

Cited by 58 publications

References 51 publications

A new route of cross‐linking of carboxylated acrylonitrile‐butadiene rubber via zinc oxide‐amino acid network formation

A new route of cross‐linking of carboxylated acrylonitrile‐butadiene rubber via zinc oxide‐amino acid network formation

Self-Healing and Highly Stretchable Hydrogel for Interfacial Compatible Flexible Paper-Based Micro-Supercapacitor

NIR Organic Dyes as Innovative Tools for Reprocessing/Recycling of Plastics: Benefits of the Photothermal Activation in the Near‐Infrared Range

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