首页|纠缠水凝胶驱动器能量转化效率的增强

纠缠水凝胶驱动器能量转化效率的增强

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传统基于水凝胶的驱动器面临诸多限制,例如低输出力(约2 kPa)和缓慢的驱动速率,因而导致其功密度低(约0.01 kJ/m3)的问题长期存在.此外,在水凝胶合成和应用中,实现低滞后和高强度也面临重大挑战.本文中,我们开发了一种稀疏交联且高纠缠的聚丙烯酸水凝胶(PAAc),有效解决了这些问题.受到哺乳动物肌肉纤维能量转换机制的启发,该水凝胶被用于储存和释放聚合物网络中的弹性势能.值得注意的是,我们实现了60.6 kPa的强收缩力、30.8kJ/m3的超高功密度,以及高达53.8%的能量转换效率.此外,该水凝胶展现出独特的双态功能,能够在弹性和塑性之间无缝转换,为可调节和精准控制能量释放机制奠定了基础.这些特性使得水凝胶驱动器有望实现多样化实际应用.
Enhancing energy conversion efficiency in entangled hydrogel actuators
Traditional hydrogels-based actuators are hin-dered 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 chal-lenges 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 net-work.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 di-verse practical applications,providing a promising advance-ment for hydrogel actuators.

hydrogelentanglementenergystoragerelease

张斌、邱建辉、孟雪芬、境英一、冯辉霞、张靓、唐建华、张国宏、吴宏、郭少云

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Department of Mechanical Engineering,Faculty of Systems Science and Technology,Akita Prefectural University,Yurihonjyo 015-0055,Japan

College of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China

Shaanxi Expressway Test and Inspection Company,Ltd.,Xi'an 710086,China

The State Key Laboratory of Polymer Materials Engineering,Sichuan University,Chengdu 610065,China

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hydrogel entanglement energy storage release

2024

中国科学:材料科学(英文)

中国科学:材料科学(英文)

CSTPCD
ISSN:
年,卷(期):2024.67(12)