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High-performance carbon nanotube/polyaniline artificial yarn muscles working in biocompatible environments

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Nano Research 2023年第3期16卷 4143-4151页

作者： Jian Qiao Yulong Wu Chengfeng Zhu lizhong dong Kunjie Wu Yulian Wang Wei Yang Min Li Jiangtao Di Qingwen Li Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co.Ltd.Beijing 102209China School of Materials Science and Engineering Key Laboratory of Aerospace Materials and PerformanceMinistry of EducationBeihang UniversityBeijing 100191China

Implantable artificial muscles are of great importance for muscle function restoration and physical augmentation but are still challenging.Herein,we report an artificial muscle by soaking-polymerization of polyaniline(PANI)inside a carbon nanotube(CNT)yarn.Working in aqueous biocompatible solutions,the yarn muscle generates a large contractile stroke of 17%and high isometric stress of 8 MPa at voltages lower than 2 V.The excellent performance can be ascribed to the large actuation volume that is enabled by the fast electrochemical redox of PANI confined in a coiled yarn structure.The actuation performance outperforms that of previously reported aqueous artificial yarn muscles.Moreover,the yarn muscle can work well and maintain excellent actuating performance in other biocompatible solutions such as normal saline and Na2SO4 aqueous solution,which makes the CNT/PANI yarn muscles suitable for implantable bionic applications.Finally,a biomimetic arm was fabricated to demonstrate the applications of the CNT/PANI yarn artificial muscle in implantable muscle,underwater robots,and soft exoskeletons.

关键词： carbon nanotube polyaniline biocompatible implantable artificial muscle

Dual-Ion Co-Regulation System Enabling High-Performance Electrochemical Artificial Yarn Muscles with Energy-Free Catch States

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Nano-Micro Letters 2023年第10期15卷 15-27页

作者： Ming Ren lizhong dong Xiaobo Wang Yuxin Li Yueran Zhao Bo Cui Guang Yang Wei Li Xiaojie Yuan Tao Zhou Panpan Xu Xiaona Wang Jiangtao Di Qingwen Li Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials Division Suzhou Institute of Nano-Tech and Nano‑BionicsChinese Academy of SciencesSuzhou 215123People’s Republic of China School of Nano‑Technology and Nano‑Bionics University of Science and Technology of ChinaHefei 230026People’s Republic of China Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of NanotechnologyNanchang 330200People’s Republic of China

Artificial yarn muscles show great potential in applications requiring low-energy consumption while maintaining high performance. However, conventional designs have been limited by weak ion-yarn muscle interactions and inefficient “rocking-chair” ion migration. To address these limitations, we present an electrochemical artificial yarn muscle design driven by a dual-ion co-regulation system. By utilizing two reaction channels, this system shortens ion migration pathways, leading to faster and more efficient actuation. During the charging/discharging process, PF_6~- ions react with carbon nanotube yarn, while Li~+ ions react with an Al foil. The intercalation reaction between PF_6~- and collapsed carbon nanotubes allows the yarn muscle to achieve an energy-free high-tension catch state. The dual-ion coordinated yarn muscles exhibit superior contractile stroke, maximum contractile rate, and maximum power densities, exceeding those of “rocking-chair” type ion migration yarn muscles. The dual-ion co-regulation system enhances the ion migration rate during actuation, resulting in improved performance. Moreover, the yarn muscles can withstand high levels of isometric stress, displaying a stress of 61 times that of skeletal muscles and 8 times that of “rocking-chair” type yarn muscles at higher frequencies. This technology holds significant potential for various applications, including prosthetics and robotics.

关键词： Artificial muscles Carbon nanotube yarns Electrochemical actuators Catch state Dual-ion co-regulation

High‑Temperature‑Tolerant Artificial Muscles Using Poly(p‑phenylene benzobisoxazole)Composite Yarns

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Advanced Fiber Materials 2022年第5期4卷 1256-1266页

作者： Jianfeng He Ming Ren lizhong dong Yulian Wang Xulin Wei Bo Cui Yulong Wu Yueran Zhao Jiangtao Di Qingwen Li School of Nano‑Technology and Nano‑Bionics University of Science and Technology of China230026 HefeiChina Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano‑Tech and Nano‑BionicsChinese Academy of Sciences215123 SuzhouChina Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of Nanotechnology330200 NanchangChina

Today the developed yarn muscles or actuators still cannot satisfy the requirements of working in high-temperature environ-ments.Thermal resistivity is highly needed in aerospace and industrial protection applications.Herein,an artificial muscle with high-temperature tolerance is prepared using carbon nanotube(CNT)wrapped poly(p-phenylene benzobisoxazole)(PBO)composite yarns.A thermal twisting method was utilized to reorientate the stiff PBO molecular chains into a uniform and twist-stable coiled structure.The CNT/PBO composite yarn muscle generates reversible contractile strokes up to 18.9%under 5.4 MPa tension and outputs 1.3 kJ kg^(-1) energy density.In contrast to previous actuators,which are normally oper-ated at room temperatures,the CNT/PBO composite yarn muscles can work at ambient temperatures up to 300℃ with high contractile stroke and long-term stability.A bionic inchworm robot,a deployable structure,and smart textiles driven by the high-temperature-tolerant yarn muscles were demonstrated,showing the promise as a soft actuator towards high-temperature environment applications.

关键词： Artificial muscles Poly(p-phenylene benzobisoxazole) Carbon nanotube Thermal twisting High-temperature tolerance

基于运营数据的发动机压气机叶片裂纹扩展规律研究

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机械强度 2024年第3期46卷 602-610页

作者：师利中董硕刘雪峰陈健中国民航大学航空工程学院天津300300 中国航发上海商用航空发动机制造有限责任公司上海201306

为研究航空发动机实际服役中转子叶片在复杂载荷作用下的裂纹损伤扩展规律,基于航空发动机运营数据构建叶片的裂纹扩展寿命曲线,同时采用断裂力学理论建立裂纹扩展速率公式。以高压压气机叶片为实例,通过流固耦合方法构建压气机叶片结... 详细信息

为研究航空发动机实际服役中转子叶片在复杂载荷作用下的裂纹损伤扩展规律,基于航空发动机运营数据构建叶片的裂纹扩展寿命曲线,同时采用断裂力学理论建立裂纹扩展速率公式。以高压压气机叶片为实例,通过流固耦合方法构建压气机叶片结构的载荷模型,分别采用Paris、Walker、Newman裂纹扩展速率公式对压气机叶尖区域进行三维裂纹扩展分析。仿真结果表明,三种裂纹扩展速率公式在裂纹扩展前期预测结果与发动机运营数据裂纹扩展曲线具有一致性,可较好地描述叶片裂纹扩展规律;在裂纹稳定扩展阶段,Walker和Newman公式预测结果相对危险,Paris公式预测结果吻合度较高,并且能与厂家技术手册中关于其损伤发展控制要求相互印证。

关键词：压气机叶片运营数据断裂力学裂纹扩展速率公式寿命预测

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机载激光通信光学窗口气动光学效应分析

红外与激光工程 2024年第4期53卷 254-265页

作者：姜逸渊孟立新张立中刘智董科研长春理工大学机电工程学院吉林长春130022 长春理工大学空地激光通信技术重点学科实验室吉林长春130022

机载激光通信中通信光束散角小、系统跟踪精度高,光学窗口的气动光学效应会引起远场光斑形状和位置发生变化,降低通信性能。为此,通过Fluent对共形和平面两种光学窗口整流罩在不同飞行高度、速度、方位角下的外流场进行稳态仿真分析,利... 详细信息

机载激光通信中通信光束散角小、系统跟踪精度高,光学窗口的气动光学效应会引起远场光斑形状和位置发生变化,降低通信性能。为此,通过Fluent对共形和平面两种光学窗口整流罩在不同飞行高度、速度、方位角下的外流场进行稳态仿真分析,利用相位屏分析远场自由衍射光斑变化。结果表明,共形窗口在俯仰、高度和速度变化中的流场更加稳定,呈现更为一致的变化趋势,且在远场衍射中表现更好。平面窗口在方位转角变化大与低速的飞行工况下,RMS值低于共形窗口。远场光斑发生偏移和弥散的程度与波面畸变成正相关,但在波面畸变较大的情况下,RMS值不能完全定义其对光学系统的影响。同时,当俯仰角靠近机体表面、降低飞行高度、增加飞行速度均会增强波面畸变。

关键词：机载激光通信气动光学远场衍射光学窗口

Integration of nanoindentation and finite element method for interpretable tensile properties:A crossscale calculation method of uneven joints

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Chinese Journal of Aeronautics 2023年第6期36卷 233-248页

作者： Kun GAO Zhiying LIU Xiuli SHEN lizhong LANG Shaojing dong School of Energy and Power Engineering Beihang UniversityBeijing100191China Department of Materials Science and Engineering University of TorontoTorontoON M5S 3E4Canada

Nanoindentation testing and its Reverse Analysis Method(RAM)show great potential in understanding the tensile properties of metallic alloys with various microstructures.Nevertheless,the tensile properties of heterogeneous materials such as nickel-based superalloy welded joints have not been well interpreted by combining the microstructures and nanoindentation results,due to their diverse and complex microscopic zones,which throws shade on the properties of separated zones in the material.Here we demonstrated a new method of implanting nanoindentation results into Finite Element Method(FEM)and applied the method to the welded joints with the zones of various microstructure features.The local properties are calculated by the nanoindentation data using RAM,and used as input of Finite Element(FE)simulation of an identical indentation process,to in turn verify the accuracy and reliability of the reverse model.The simulation results reveal that the global mechanical behaviors,such as Young's modulus,yield strength and strain hardening exponent,are related to the local properties to a great extent.Thus,the global properties can be verified by simulation straight after experiments,taking consideration of local properties and dimension parameters of different zones.It is shown that the maximum error between calculation of RAM and testing is within 5.1%in different zones,and the errors of maximum indentation depth and residual depth obtained by FE simulation are less than 2.4%,which indicates that the method provides a reliable prediction of mechanical properties of superalloy welded joints.

关键词： Finite element method Nanoindentation Reverse analysis method Tensile properties Welded joints

中试紫外/氯工艺对饮用水中微量有机污染物及消毒副产物的削减

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环境工程学报 2024年第3期18卷 709-717页

作者：刘丽忠李一繁尤立陈榕汶王亮王平董慧峪李文涛强志民东华理工大学水资源与环境工程学院南昌330013 中国科学院生态环境研究中心饮用水科学与技术重点实验室北京100085 中国科学院生态环境研究中心环境水质学国家重点实验室北京100085 绍兴市上虞区供水有限公司绍兴312300 东华理工大学南昌330013

针对水源微污染等问题,在某饮用水厂开展紫外/氯高级氧化工艺深度处理滤后水的中试研究,探究不同工艺条件下水中微量有机污染物(TrOCs,traceorganiccontaminants)的去除及消毒副产物(DBPs,disinfectionbyproducts)的控制机制。结果表明... 详细信息

针对水源微污染等问题,在某饮用水厂开展紫外/氯高级氧化工艺深度处理滤后水的中试研究,探究不同工艺条件下水中微量有机污染物(TrOCs,traceorganiccontaminants)的去除及消毒副产物(DBPs,disinfectionbyproducts)的控制机制。结果表明,紫外/氯工艺可高效去除滤后水中的异丙甲草胺、多菌灵、吡虫啉等农药,上述基础工况下其总体去除率为87.1%。提高紫外剂量对各类农药去除率的提升效果优于增大加氯量。水中全氟化合物(PFCs,perfluorinated compounds)的去除效率一般,其中全氟辛酸(PFOA,Perfluorooctanoic acid)去除率(46.4%)相对最高,而部分工况下全氟己酸(PFHxA,perfluorocaproic acid)等出现浓度升高的情况,说明在紫外/氯高级氧化过程中可能存在长链PFCs向短链PFCs转化的降解途径。紫外/氯高级氧化过程伴随着一定量的三氯甲烷(TCM,trichloromethane)等DBPs的生成(≤8.8μg·L^(-1)),但工艺出水的消毒副产物生成势(DBPsFP,formation potential of DBPs)下降明显,且加氯量越高消毒副产物的生成势越低,其最低值(12.9μg·L^(-1))相较于处理前降幅达到66.3%。对滤后水中常规有机物指标进行分析,发现紫外/氯工艺可以强化去除滤后水中的芳香性和荧光性有机物,工艺出水的比紫外吸光度(SUVA)降至1.0 L·(mg·m)^(-1)以下,3类荧光组分的去除率在41.8%~71.6%。相关性分析结果表明,紫外/氯处理过程中DBPs的生成及后续DBPsFP的大小主要取决于水中荧光性/芳香性有机物组分的含量。

关键词：紫外/氯饮用水农药全氟化合物消毒副产物消毒副产物生成势

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水稻抗倒伏候选基因的鉴定与功能分析

华中农业大学学报 2024年第2期43卷 75-84页

作者：西若曲宗向登豪郭子龙姚义龙董发明熊立仲作物遗传改良全国重点实验室武汉430070 湖北洪山实验室武汉430070 福建农林大学海峡联合研究院福州350002

为进一步挖掘控制水稻抗倒伏的基因,以524份水稻种质资源为材料,采用GWAS(genome-wide association analysis)鉴定与抗倒伏性状显著关联的位点qRLG7,通过基因表达水平分析和候选基因关联分析确定调控水稻抗倒伏性的候选基因,在分析候选... 详细信息

为进一步挖掘控制水稻抗倒伏的基因,以524份水稻种质资源为材料,采用GWAS(genome-wide association analysis)鉴定与抗倒伏性状显著关联的位点qRLG7,通过基因表达水平分析和候选基因关联分析确定调控水稻抗倒伏性的候选基因,在分析候选基因的表达特征和启动子区自然变异基础上利用CRISPR-Cas9技术构建2个候选基因的突变体家系,考察转基因材料的抗倒伏性状。结果显示,编码肌醇-1-单磷酸酶的2个串联排列基因LOC_Os07g37220和LOC_Os07g37230在离茎秆基部5 cm节间中的表达量显著高于其余候选基因,而且这2个候选基因的表达量在极端抗倒伏和易倒伏2组材料中存在极显著差异;通过候选基因关联分析发现这2个基因启动子区的SNP与离基部5 cm茎秆直径(CD5)的表型值显著关联,且基于显著关联SNP的2种单倍型的CD5表型值存在显著差异,这2个候选基因的2种单倍型启动子活性检测结果也表明2种单倍型之间存在极显著差异;2个基因的功能缺失突变体植株在基部节间抗折力、茎秆厚度、茎秆直径以及株高和穗质量等性状方面与野生型对照存在显著差异。结果表明,候选基因LOC_Os07g37220和LOC_Os07g37230具有一定的抗倒伏功能。

关键词：水稻抗倒伏关联分析候选基因肌醇-1-单磷酸酶(IMP)

Effect of surfactant on phenanthrene metabolic kinetics by Citrobacter sp. SA01

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Journal of Environmental Sciences 2014年第11期26卷 2298-2306页

作者： Feng Li lizhong Zhu dong Zhang Department of Environmental Science Zhejiang University Zhejiang Provincial Key Laboratory of Organic Pollution Process Control Zhejiang Yuying College

To attain a better understanding of the effects of surfactants on the metabolic kinetics of hydrophobic organic compounds, the biodegradation of phenanthrene by Citrobacter sp. SA01 was investigated in a batch experiment containing Tween 80, sodium dodecyl benzene sulfonate and liquid mineral salt medium. The Monod model was modified to effectively describe the partition, phenanthrene biodegradation and biopolymer production. The results showed that Tween 80 and sodium dodecyl benzene sulfonate （each at 50 rag/L） enhanced phenanthrene metabolism and poly-β-hydroxybutyrate production as indicated by the increasing amounts of intermediates Coy 17.2% to 47.9%）, and percentages of poly-β- hydroxybutyrate （by 107.3% and 33.1%） within the cell dry weight when compared to their absence. The modified Monod model was capable of predicting microbial growth, phenanthrene depletion and biopolymer production. Furthermore, the Monod kinetic coefficients were largely determined by the surfactant-enhanced partition, suggesting that partitioning is a critical process in surfactant-enhanced bioremediation of hydro- phobic organic compounds.

关键词： Phenanthrene Biodegradation Surfactant Kinetics Citrobacter sp.