Enhancing energy conversion efficiency in entangled hydrogel actuators

IF 6.8 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Bin Zhang  (, ), Jianhui Qiu  (, ), Xuefen Meng  (, ), Eiichi Sakai  (, ), Huixia Feng  (, ), Liang Zhang  (, ), Jianhua Tang  (, ), Guohong Zhang  (, ), Hong Wu  (, ), Shaoyun Guo  (, )
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引用次数: 0

Abstract

Traditional hydrogels-based actuators are hindered by limitations such as low deliverable forces (∼2 kPa) and sluggish actuation speeds, culminating in persistent issues with low work density (∼0.01 kJ/m3). Furthermore, achieving low hysteresis and high strength presents significant challenges in both their synthesis and applications. Herein, we developed poly(acrylic acid) hydrogels characterized by sparse cross-linking and high entanglement, effectively addressing these issues. Inspired by the energy conversion mechanisms of mammalian muscle fibers, the hydrogels were utilized for storing and releasing elastic potential energy in polymer network. Notably, we achieved a remarkable contractile force of 60.6 kPa, an ultrahigh work density of 30.8 kJ/m3, and an energy conversion efficiency of up to 53.8%. Furthermore, the hydrogels exhibit unique dual-state functionality, seamlessly transitioning between elasticity and plasticity, which paves the way for adaptable and precisely controllable energy release mechanisms. These features hold significant potential for diverse practical applications, providing a promising advancement for hydrogel actuators.

提高缠结水凝胶致动器的能量转换效率
传统的水凝胶致动器受到各种限制,例如可传递力低(∼2 kPa)和致动速度慢,最终导致低功密度(∼0.01 kJ/m3)问题长期存在。此外,实现低滞后和高强度也是合成和应用中的重大挑战。在此,我们开发了以稀疏交联和高缠结为特征的聚(丙烯酸)水凝胶,有效地解决了这些问题。受哺乳动物肌肉纤维能量转换机制的启发,我们利用水凝胶在聚合物网络中存储和释放弹性势能。值得注意的是,我们获得了 60.6 kPa 的显著收缩力、30.8 kJ/m3 的超高功密度和高达 53.8% 的能量转换效率。此外,这种水凝胶还表现出独特的双态功能,可在弹性和可塑性之间无缝转换,这为建立适应性强、可精确控制的能量释放机制铺平了道路。这些特性为各种实际应用提供了巨大潜力,为水凝胶致动器的发展提供了广阔前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Science China Materials
Science China Materials Materials Science-General Materials Science
CiteScore
11.40
自引率
7.40%
发文量
949
期刊介绍: Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.
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