摘要
碳纳米管具有优异的电学、力学和热学等性能,但其组装而成的一维宏观材料碳纳米管纤维纱线之间的空隙是负载和电子转移的缺陷位点。文章通过水热法将铂纳米粒子原位生长到碳纳米管纱线上,可填补纱束间的空隙,用来改善纱线的电学和力学性能,并采用间隔嵌入法制备了应变传感器。结果表明:被铂粒子修饰过的碳纳米管纱线,其拉伸强度从129.54 MPa增加到143.48 MPa,电导率从5.34×10^(4)S/m增加到9.5×10^(4)S/m。通过与立体弹性编织物相结合,基于纺织品的柔性应变传感器表现出良好的传感性能、快速响应性、循环稳定性,以及良好的耐洗性、耐候性和耐汗性,且在监测人体不同关节的运动方面展现出优异的传感特性。
With the development of science and technology and the continuous improvement of people’s demand for quality of life,electronic components are gradually combined with flexible substrates.Flexible wearable devices,which have many advantages such as flexibility,deformation and good biological adaptability,have received increasing attention.Specifically,the flexible strain sensor is an important direction in the development of flexible wearable devices,and it is also a research hotspot in recent years.Traditional commercial strain sensors,generally made of metal or semiconductors,have the characteristics of low cost,stable performance,and wide application.However,due to the nature of metal or semiconductor materials,the strain range is generally not more than 5%,the flexibility is poor,and the sensitivity factor is about 2.Traditional strain sensors are difficult to apply to measurements under high strain conditions,and cannot meet the requirements of large strain range,flexibility,wearability,comfort,and biocompatibility required by wearable sensors.In recent years,the rapid development of flexible strain sensors has the characteristics of large sensing range,high sensitivity,lightness and softness.It provides a feasible way to measure strain under large strain and flexible conditions,and the temperamental strain sensor shows great application prospects in the fields of motion monitoring,human health monitoring,and human-computer interaction.Carbon nanotube fibers yarns have excellent electrical,mechanical,and thermal properties,and are widely used in many fields such as flexible robots,smart fabrics,flexible wearable devices,and thermal management.However,the gaps in the carbon nanotube fiber bundles hinder the payload and electron transport between the carbon nanotube bundles,resulting in lower mechanical and electrical properties than individual carbon nanotubes.In this study,platinum nanoparticles were self-grown onto the surface of carbon nanotube yarns by hydrothermal method to fill the gaps in the conductive network between carbon nanotube yarn bundles,and then the treated carbon nanotube blended yarns were embedded in the three-dimensional elastic braid with large deformation by spacing method to improve the tensile strain performance of carbon nanotube blended yarns.The hydrothermal method could make the platinum nanoparticles grow uniformly into the gap of the carbon nanotube yarn,and the particle diameter was about 100-120 nm.The tensile strength of carbon nanotube yarn modified with platinum particles increased from 129.54 MPa to 143.48 MPa,and the conductivity increased from 5.34×10^(4)S/m to 9.5×10^(4)S/m.To sum up,the prepared strain sensor has good washability,weather resistance and sweat resistance,and exhibits good cyclic stability during 300 continuous stretch-release cycles.In addition,the prepared flexible strain sensor can also monitor finger,wrist,elbow and other joint movements,showing great potential in the field of smart wearable devices.
作者
谢金林
顾鹏
邱华
XIE Jinlin;GU Peng;QIU Hua(College of Textile Science and Engineering,Jiangnan University,Wuxi 214122,China)
出处
《丝绸》
北大核心
2025年第3期65-73,共9页
Journal of Silk
基金
江苏省产学研项目(BY20221191)
江西省揭榜挂帅重大项目(20213AAE02017)。
关键词
铂纳米粒子
碳纳米管
应变传感器
柔性可拉伸
间隔嵌入
立体弹性编织物
platinum nanoparticles
carbon nanotubes
strain sensors
flexible and stretchable
interval embedding
three-dimensional elastic braid
