刚度
跨度(工程)
材料科学
结构工程
复合材料
工程类
作者
Ziguang Zhao,Zhuo Cao,Zhixin Wu,Wenxin Du,Xue Meng,Huawei Chen,Yuchen Wu,Lei Jiang,Mingjie Liu
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2024-03-08
卷期号:10 (10)
标识
DOI:10.1126/sciadv.adl2737
摘要
Currently, it remains challenging to balance intrinsic stiffness with programmability in most vitrimers. Simultaneously, coordinating materials with gel-like iontronic properties for intrinsic ion transmission while maintaining vitrimer programmable features remains underexplored. Here, we introduce a phase-engineering strategy to fabricate bicontinuous vitrimer heterogel (VHG) materials. Such VHGs exhibited high mechanical strength, with an elastic modulus of up to 116 MPa, a high strain performance exceeding 1000%, and a switchable stiffness ratio surpassing 5 × 10 3 . Moreover, highly programmable reprocessing and shape memory morphing were realized owing to the ion liquid–enhanced VHG network reconfiguration. Derived from the ion transmission pathway in the ILgel, which responded to the wide-span switchable mechanics, the VHG iontronics had a unique bidirectional stiffness-gated piezoresistivity, coordinating both positive and negative piezoresistive properties. Our findings indicate that the VHG system can act as a foundational material in various promising applications, including smart sensors, soft machines, and bioelectronics.
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