首页|蚕丝基柔性压力传感器的制备及其性能研究

蚕丝基柔性压力传感器的制备及其性能研究

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蚕丝具有优异的生物相容性、可降解性和易加工性等,是应用于柔性电子领域的理想柔性基底材料.本文通过气液界面聚合法,在蚕丝织物、平板丝和静电纺丝素膜三种蚕丝材料表面实现聚苯胺的原位生长,成功制备出以聚苯胺为活性导电介质的柔性基材,并将其组装成柔性压阻式压力传感器,这为开发高性能、安全可靠和轻质便携的可穿戴电子产品提供新的方法和途径.结果表明:三种蚕丝基柔性压力传感器中,蚕丝织物/聚苯胺传感器具有最大的压力检测范围(16.27-504.79 kPa),拉伸变形可达20%,灵敏度仅为0.001 29 kPa-1;静电纺丝素膜/聚苯胺传感器灵敏度最高(0.013 76 kPa-1),但拉伸变形能力差,仅可拉伸2.3%;平板丝/聚苯胺传感器压力检测灵敏度略高于蚕丝织物/聚苯胺传感器,达到0.00134 kPa-1,线性检测范围为9.8-87.6 kPa.本文研究开发的蚕丝基柔性压力传感器在运动检测领域具有较好的应用前景.
Study on the preparation and performance of silk-based flexible pressure sensors
Wearable electronic devices are portable gadgets worn either directly on the body or embedded in clothing or accessories.They offer functionalities across several domains such as medical health,outdoor sports,video and audio entertainment.Advancements in science and technology have led to electronic components being combined with flexible substrates,facilitating the development of wearable electronics in a more flexible and lightweight direction.This is beneficial to enhancing individuals'quality of life.Flexible wearable technology offers significant advantages such as flexibility,easy deformation,and good biological adaptability.However,there are also issues such as low sensitivity,limited detection range,and weak reliability resulting from environmental interference.The flexible pressure sensor plays a significant role in pressure detection within these devices.Therefore,the key to the development of flexible wearable devices lies in the advancement of flexible pressure sensors with outstanding performance.Flexible pressure sensors merge the suppleness of wearable materials with the electrical activity of electronic components,and can be attached to irregular surfaces to efficiently detect the pressure on the surface of objects.The selection of substrates and conductive materials will have a direct impact on the sensing performance of the flexible pressure sensor.Silk is a biological material with a lengthy history,possessing exceptional tensile strength and toughness,biocompatibility,biodegradability,and effortless processing,making it an ideal material for flexible sensors.Based on the features of silk processing and molding,it can be categorized into natural silk-based materials,regenerated silk protein materials,and silk primary fibers and aggregates.Consequently,in this study,three types of silk materials including silk fabric,flat silk cocoon,and electrospun silk fibroin film are selected as flexible substrates to develop the flexible sensors.Polyaniline(PANI),a unique conductive polymer,exhibits electrical conductivity when acid-doped and oxidized;however,it lacks conductivity when either completely oxidized or completely reduced.The gas-liquid interface polymerization process restricts the synthesis of PANI to the two-phase interface,ensuring controlled reaction degree to prevent over-oxidization of aniline.Additionally,it prevents secondary growth,resulting in PANI that exhibits uniform morphology.Herein,on the basis of the above analysis,the gas-liquid interface polymerization method was utilized to achieve in-situ growth of PANI on silk fabric,flat silk cocoon,and electrospun silk fibroin film,prepare a flexible substrate with PANI as an active conductive substance and assemble it into a flexible pressure sensor,so as to explore the changes in the properties of silk materials before and after the gas-liquid interface polymerization and the performance of the flexible pressure sensor based on silk.This study presents a novel approach and theoretical foundation for creating wearable electronic devices with optimal performance,safety,dependability,and effortless portability.The study demonstrates that among the three types of silk-based flexible pressure sensors,the SFP sensor has the largest pressure sensing range(16.27-504.79 kPa),the tensile deformation can reach 20%,while the sensitivity is only 0.001 29 kPa-1.The sensitivity of the ESFP sensor is the highest(0.013 76 kPa-1),but the tensile deformation ability is poor,only being 2.3%.The pressure detection sensitivity of the SFCP sensor is slightly higher than that of the SFP sensor,reaching 0.001 34 kPa-1,and the linear detection range is 9.8-87.6 kPa.The developed silk-based flexible pressure sensor has a good application prospect in the field of motion detection,but it still requires external power supply,which will limit the flexibility and convenience of wearable devices.Therefore,the future research direction can be to combine the silk-based flexible pressure sensor developed in this study with self-powered devices and develop an integrated intelligent detection system.This can provide a broader perspective for intelligent pressure detection.

silk fabricflat silk cocoonelectrospun silk fibroin filmpolyanilinegas-liquid interface bondingflexible pressure sensor

刘嘉琪、汪宇佳、王胜男、代方银、李智

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西南大学资源昆虫高效养殖与利用全国重点实验室,重庆 400715

西南大学蚕桑纺织与生物质科学学院,重庆 400715

西南大学重庆市生物质纤维材料与现代纺织工程技术研究中心,重庆 400715

西南大学农业农村部蚕桑生物学与遗传育种重点实验室,重庆 400715

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蚕丝织物 平板丝 静电纺丝素膜 聚苯胺 气液界面结合 柔性压力传感器

重庆市教委科学技术研究计划大学生创新创业训练计划

KJQN202100203X202310635299

2024

丝绸
浙江理工大学 中国丝绸协会 中国纺织信息中心

丝绸

CSTPCD北大核心
影响因子:0.567
ISSN:1001-7003
年,卷(期):2024.61(4)
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