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腾龙公司联系客服〖电话—18183990008—微信-44488480〗腾龙公司实力运营团队为您解决一切问题烦恼,真人美女荷官等您体验,腾龙公司客服24小时在线为您服务。（Unipolar）驱动，同时发现了人工肌肉随电容降低，驱动性能增强的反常现象（Scan Rate Enhanced Stroke, SRES），这一重要突破解决了人工肌肉驱动性能的电容依赖性问题，为后续设计具有无毒、低驱动电压的高性能驱动器提供新的理论基础。研究成果以“单极冲程、电渗泵碳纳米管纱线肌肉”（Unipolar-Stroke, Electroosmotic-Pump Carbon Nanotube Yarn Muscles）为题，在线发表于著名学术期刊《科学》（Science）上，我校为共同通讯作者和共同第一作者单位，其中我校冷劲松教授为共同通讯作者（江苏大学丁建宁、哈尔滨工业大学冷劲松、美国德克萨斯大学达拉斯分校Ray H. Baughman），其博士毕业生楚合涛为共同第一作者（楚合涛、胡兴好、王锺、穆九科）。2014至2016年，楚合涛在德克萨斯大学达拉斯分校进行博士生联合培养，自2014年起，冷劲松教授课题组与德克萨斯大学达拉斯分校Ray H. Baughman教授课题组开始该项工作研究，并取得了关键性突破。
目前，新材料正由轻质、多功能化向智能化方向发展。智能材料（Smart Materials）是指一类可以在外界激励下做出主动响应的新材料，具有自驱动、自监测、自修复等多种功能，在人工智能、智能制造、生物医疗、机器人等领域具有广泛的应用前景。聚合物纤维与碳纳米管纱线人工肌肉是一种典型的智能材料，主要通过热、电化学两种方式实现驱动。由热力学定律可知，热驱动受到卡诺循环效率的限制，从而影响了其应用潜力。相比而言，电化学驱动克服了卡诺循环效率限制的问题，能量转换效率更高，具有更广阔的应用前景。
传统的电化学碳纳米管纱线人工肌肉（以下称：人工肌肉）存在以下局限性：（1）阴阳离子的嵌入、嵌出过程使得驱动应变与扫描电压之间呈现出“双极”效应，这意味着在电化学窗口内，纤维尺寸不是单调性变化，反向离子的嵌入、嵌出抵消了驱动应变，从而降低了人工肌肉的驱动性能；（2）人工肌肉的性能完全依赖于工作电极的电容特性，即随着扫描速率的增加，性能急剧降低。因此，传统的人工肌肉只能产生单向驱动，而且需在极低的扫描速率下工作。
针对以上问题，本研究通过聚电解质（零点电位移动试剂）功能化的策略，改变人工肌肉的零点电位：（1）实现了单一离子嵌入、嵌出的“单极”效应，解决了“双极”效应反向离子的嵌入、嵌出引起的性能降低问题，提高了做功效率与能量密度等性能；（2）人工肌肉随扫描速率增加，驱动性能增加，实现了SRES效应，解决了传统人工肌肉驱动性能的电容依赖性问题。进一步研究发现，SRES效应是因水合离子在高扫描速率或脉冲频率下可带动周围的水分子，从而增大了离子的有效尺寸，提高人工肌肉性能。
相比于传统人工肌肉，该人工肌肉具有无毒、驱动频率高（高达10 Hz）、驱动电压低（1 V）、高比能量（0.73~3.5 J/g），高驱动应变（3.85~18.6 %）以及高能量密度（高达8.17 W/g）等特性，在空间展开结构、仿生扑翼飞行器、可变形飞行器、水下机器人、柔性机器人、可穿戴外骨骼、医疗机器人等领域具有巨大的应用潜力。
在杜善义院士、韩杰才院士的带领下，我校复合材料与结构研究所于20世纪90年代初在国内较早地确立了智能材料与结构的研究方向。在“崇德广业，穷理致用”发展理念的指导下，冷劲松教授课题组长期从事智能材料结构力学及应用研究，主要研究方向包括形状记忆聚合物及其复合材料结构、人工肌肉、多功能纳米复合材料结构、空间可展开结构、可变形飞行器、柔性机器人、4D打印技术及生物医疗器件、结构健康监测、振动主动控制等。
文章链接：https://science.sciencemag.org/content/371/6528/494
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