A Strong and Tough Ion-gel Enabled by Hierarchical Meshing and Ion Hybridizations Collaboration

IF 5.1 Q1 POLYMER SCIENCE

ACS Macro Letters Pub Date : 2024-11-13 DOI:10.1002/adfm.202414682

Wenxuan Peng, Jiamin Zhao, Qiuxian Li, Yue Sun, Guoli Du, Fangyuan Tang, Yongfei Liu, Qingdi Hu, Xusheng Li, Shuangxi Nie

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Abstract

Ion-gels, with inherent flexibility, tunable conductivity, and multi-stimulus response, have attracted significant attention in flexible/wearable electronics. However, the design of ion-gels that exhibit both strength and toughness is challenging. In this study, a novel ion-gel design is proposed that mimics the hierarchical meshing structure of leaves in combination with ion hybridization. Polyacrylamide (PAM) is incorporated in TEMPO oxidized cellulose nanofibers (TOCNFs) clusters by in situ polymerization, generating a hydrogel with micro/nanoscale entangled networks. Replacement of water by a metal halide ionic liquid ([BMIm]Zn_xCl_y) in the hydrogel resulted in the formation of an ion hybrid network with supramolecular interactions. The integration of the PAM/TOCNF polymer network with [BMIm]Zn_xCl_y resulted in ion-gels with high strength (5.9 MPa), toughness (22 MJ m⁻³), and enhanced elastic modulus (30 MPa) combined with non-flammability, heat and cold resistance. While having fast responsiveness (36 ms) of sensing signal and stability of power supply even at 4000 cycle collisions. Stable signal output even at high (200 °C) /sub-zero temperatures. The proposed strategy offers a new approach to the material design of flexible/wearable electronics.

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通过分层网格和离子杂化合作实现的强韧离子凝胶

离子凝胶具有固有的柔韧性、可调导电性和多刺激响应，在柔性/可穿戴电子设备中备受关注。然而，如何设计出既有强度又有韧性的离子凝胶是一项挑战。本研究提出了一种新颖的离子凝胶设计，它模仿了树叶的分层网状结构，并与离子杂化相结合。通过原位聚合将聚丙烯酰胺（PAM）加入 TEMPO 氧化纤维素纳米纤维（TOCNFs）簇中，生成了一种具有微/纳米级缠结网络的水凝胶。在水凝胶中用金属卤化物离子液体（[BMIm]ZnxCly）取代水后，形成了具有超分子相互作用的离子混合网络。PAM/TOCNF 聚合物网络与[BMIm]ZnxCly 的整合使离子凝胶具有高强度（5.9 兆帕）、韧性（22 兆焦耳/立方米）和增强的弹性模量（30 兆帕），同时还具有不可燃性、耐热性和耐寒性。传感信号响应速度快（36 毫秒），即使在 4000 次循环碰撞时也能稳定供电。即使在高温（200 °C）/零度以下也能输出稳定的信号。所提出的策略为柔性/可穿戴电子设备的材料设计提供了一种新方法。

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来源期刊

ACS Macro Letters 化学-

CiteScore

10.40

自引率

3.40%

发文量

209

审稿时长

1 months

期刊介绍： ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science. With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.