Concentric ice-templating of ultracompressible tough hydrogels with bioinspired circumferentially aligned architecture

文献类型： 外文期刊

第一作者： Gu, Wenxi

作者： Gu, Wenxi;Yang, Shuqi;Zhao, Dazhe;Zou, Yiwei;Niu, Peiqi;Kwok, Chi Tat;Lei, Iek Man;Gu, Wenxi;Yang, Shuqi;Zhao, Dazhe;Zou, Yiwei;Niu, Peiqi;Lei, Iek Man;Chen, Chonghao;Wang, Chunming;Liang, Xiangyu;Zhou, Bingpu;Huang, Yan Yan Shery;Liu, Ji

作者机构：

期刊名称：SCIENCE ADVANCES （ 影响因子：12.5； 五年影响因子：14.1 ）

ISSN：

年卷期： 2025 年 11 卷 25 期

页码：

收录情况： SCI

摘要： Materials with circumferentially aligned fibers, such as intervertebral discs and arteries, are abundant in nature but challenging to replicate artificially, despite their mechanical advantages. Although ice-templating can create bioinspired materials, the achievable structures remain limited to simple forms, such as honeycomb, lamellar, and radial structures. Here, we developed a unique ice-templating technique that constructs circumferential fibrous structures in hydrogels through slow freezing. Enhanced with rotary compression annealing, these hydrogels exhibit record-breaking features that cannot concurrently be achieved in conventional ice-templated and top-performing tough hydrogels, including high tensile properties, isotropic fatigue threshold of 2320 joules per square meter, ultracompressibility (8% strain after 500 cycles), and extraordinary burst pressure of 1.6 bar while maintaining 85 weight % water content. These properties enable opportunities in robotics, including hydrogel pneumatic grippers and an untethered bioinspired robotic fish that exhibits high-force actuation and long-term robustness. Our approach enriches the diversity of bioinspired structures in artificial materials, establishing exceptional mechanical properties through cross-length scale structural design.

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