High‐Toughness and High‐Strength Solvent‐Free Linear Poly(ionic liquid) Elastomers

Li, Lingling; Wang, Xiaowei; Gao, Shuna; Zheng, Sijie; Zou, Xiuyang; Xiong, Jiaofeng; Li, Weizheng; Yan, Feng

doi:10.1002/adma.202308547

Cited by 27 publications

(4 citation statements)

References 64 publications

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“…Turning to the electromechanical response, the homogenous PHFBA/LiTFSI fiber displayed a significant strain‐induced resistance increase (Figure 2f), like most conventional ionic conductors. [ 14,15,39–41 ] As we mentioned, its slightly lower electromechanical response than bulk conductor is attributed to chain alignment. Remarkably, all the bicontinuous fibers with the SN contents from 0.8 to 1.5 exhibited significantly suppressed resistance changes upon stretch.…”

Section: Resultsmentioning

confidence: 96%

A Solid–Liquid Bicontinuous Fiber with Strain‐Insensitive Ionic Conduction

Ye,

Wu,

Sun

et al. 2024

Advanced Materials

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Stretchable ionic conductors are crucial for enabling advanced iontronic devices to operate under diverse deformation conditions. However, when employed as interconnects, existing ionic conductors struggle to maintain stable ionic conduction under strain, hindering high‐fidelity signal transmission. Here we show that strain‐insensitive ionic conduction can be achieved by creating a solid‐liquid bicontinuous microstructure. We fabricated a bicontinuous fiber from polymerization‐induced phase separation, which contains a solid elastomer phase interpenetrated by a liquid ion‐conducting phase. The spontaneous partitioning of dissolved salts leads to the formation of a robust self‐wrinkled interface, fostering the development of highly tortuous ionic channels. Upon stretch, these meandering ionic channels are straightened, effectively enhancing ionic conductivities to counteract the strain effect. Remarkably, the fiber retains highly stable ionic conduction till fracture, with only 7% resistance increase at 200% strain. This approach presents a promising avenue for designing durable ionic cables capable of signal transmission with minimal strain‐induced distortion.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 96%

A Solid–Liquid Bicontinuous Fiber with Strain‐Insensitive Ionic Conduction

Ye,

Wu,

Sun

et al. 2024

Advanced Materials

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“…Therefore, the toughness of the chain extenders also shows a similar trend. This excellent mechanical performance has surpassed most reported adhesives and elastomers, as shown in Figure c. − …”

Section: Experimental Sectionmentioning

confidence: 83%

Ultralow-Temperature-Tolerance Adhesive with Excellent Toughness and Record-High Strength

Sun,

Liu,

Chen

et al. 2024

ACS Materials Lett.

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With the in-depth exploration of extreme environments in polar, mountainous areas, and outer space, the demand for ultralow temperature resistant adhesives is increasing. However, for most adhesives used, represented by epoxy and acrylic resins, this is almost impossible due to their extensive intermolecular interaction and rigid three-dimensional (3D) network structure. Herein, an adhesive with a well-designed hard−soft phase separation structure has been developed in this work, which exhibits excellent bonding strength and debonding performance when bonded to metals (stainless steel and aluminum) and nonmetallic materials (polycarbonate) at −80 °C. The bonding strength and debonding energy with stainless steel reached 35.7 MPa and 61.16 kN/m, respectively, which is 5 times higher than those reported in the literature. Moreover, the adhesive exhibits good stability after 10 cycles of rapid cooling and heating between −196−50 °C. Finally, the mechanism behind the excellent bonding was verified, which stems from the strong polarity of the hard segments and the hardening of the soft segments.

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“…13,14 The application spectrum of these materials is impressively broad, covering domains including energy storage, bioelectronics, gas-separating membranes, sensors, and actuators. 15–22 As the materials’ requirements vary based on specific applications, no one-size-fits-all solution exists for ionogels. Their efficacy is contingent upon the specific needs of the application at hand.…”

Section: Introductionmentioning

confidence: 99%