CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Weijun Jiang,Jingyuan Liu,Hongsen Zhang,Dalei Song,Jing Yu,Qi Liu,Rongrong Chen,Jiahui Zhu,Jun Wang
Wearable, flexible sensors based on hydrogel fabrication have recently gained significant attention due to their unique properties. However, developing hydrogel sensors that maintain high sensitivity and work effectively in sub-zero temperatures remains a formidable challenge. Herein, a hydrogel with surfaces featuring randomly distributed microspines is synthesized by combining sodium alginate (SA) and acrylamide (AM) as the hydrogel components. To fabricate a wearable sensor, a highly conductive MXene layer is inkjet-printed onto the surface of the hydrogel microspines. The resulting sensor exhibits a remarkable array of features, including exceptional sensitivity (15.03 kPa −1 ), a low detection limit (10 Pa), a vast operating range (0.12–70 kPa), rapid response and recovery (40/100 ms), reliable performance (over 1000 cycles), and outstanding resistance to low temperatures (-20 °C). Moreover, this hydrogel-based sensor facilitates the efficient collection of human monitoring data, such as vocal patterns, pulse, and joint movements, even when operating at −20 °C and in ice bath conditions. Importantly, the surface-based inkjet MXene hydrogels could be assembled into a deformable triboelectric nanogenerator (TENG), allowing mechanical energy harvesting. The TENG exhibited peak output voltage and current values of 5 V and 2.5 μA, respectively.
研究领域:
生物医学工程
·
柔性电子
·
纳米能源
·
可穿戴设备
·
传感器技术
·
功能材料
·
转化医学
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2019
·Vol. 4
·期 10
·1900426
·
IF 5.395
Peng Bi,Xiaowei Liu,Yang Yang,Ziyu Wang,Jing Shi,Gaomin Liu,Fangfang Kong,Benpeng Zhu,Rui Xiong
Wearable devices have become very important for collecting health information and monitoring the condition of seriously ill patients. However, most recently developed wearable devices can only monitor limited signals within a very small range of values. A novel sensor is fabricated by modifying the surface of polyimide nanowires with silver nanoparticles. These nanowire sensors can sense both pressure and temperature changes and have antimicrobial properties. The fabricated sensor can detect a wide range of pressure variation from 5 KPa to 100 KPa. A theoretical model is developed to explain the sensing mechanism of the silver-nanoparticle-modified polyimide nanowires. The experimental and theoretical results for the nanowires are in good agreement. By attaching these sensors to human joints and fingers, real-time information can be detected for human motion, such as walking or holding a hot cup of water. The excellent performance of this device shows that it has great potential for use in artificial skins for detecting temperature and human motion.
研究领域:
生物医学工程
·
纳米医学
·
柔性电子
·
智能材料
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转化医学
·
可穿戴传感器
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yu Lin,Shengxin Xiang,Wenjun Zou,Xiaohua Chen,Feixiang Gao,Yi Liu,Yijie Sun,Ping Chen,Quanxi Zhang,Xuelian Han,Baoping Wang,Yong Yao,Qiongfeng Shi,Jun Wu
Increased intraocular pressure (IOP) can lead to optic nerve damage and various ocular diseases, including glaucoma, which is the primary cause of irreversible blindness. Thus, IOP monitoring is essential, but traditional tonometers are uncomfortable and inappropriate for continuous monitoring. Herein, we propose the combination of magneto-elastic sensing with smart contact lenses for IOP monitoring, offering the advantages of simple design, contactless detection, and low-frequency which is strong anti-interference. The Magneto-Elastic Sensor based IOP Monitoring System combines a magnetic contact lens (MCL) with a wireless signal reading circuit. When the MCL undergoes deformation in response to changes in IOP, this deformation affects the inductance value of the detecting coil, and the circuit collects data from the detecting coil to measure the variations in IOP. The MCL utilizes the commonly available and cost-effective Fe 3 O 4 as the sensing layer. The sensing approach achieved a sensitivity of 0.114 nH/mmHg on an artificial rubber eye in vitro, while also demonstrating high resistance to interference from daily objects and the human body. Besides, this non-contact method allows for continuous, convenient, and comfortable monitoring of IOP. The system demonstrates the potential for integration into the metaverse and has shown high biocompatibility and comfortable wearability through testing.
研究领域:
生物医学工程
·
眼科学
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可穿戴传感器
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磁弹性材料
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远程医疗
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Lin Zhang,Hongqiang Li,Xuejun Lai,Tianyuan Gao,Jian Yang,Xingrong Zeng
In the past several years, wearable pressure sensors have engendered a new surge of interest worldwide because of their important applications in the areas of health monitoring, electronic skin, and smart robots. However, it has been a great challenge to simultaneously achieve a wide pressure-sensing range and high sensitivity for the sensors until now. Herein, we proposed an innovative strategy to construct multilayer-structure piezoresistive pressure sensors with an in situ generated thiolated graphene@polyester (GSH@PET) fabric via the one-pot method. Taking advantage of the spacing among the rough fabric layers and the highly conductive GSH, the sensor realized not only a wide pressure range (0–200 kPa), but also high sensitivity (8.36 and 0.028 kPa–1 in the ranges of 0–8 and 30–200 kPa, respectively). After 500 loading–unloading cycles, the sensor still kept high sensitivity and a stable response, exhibiting great potential in long-term practical applications. Importantly, the piezoresistive pressure sensor was successfully applied to accurately detect different human behaviors including pulse, body motion, and voice recognition. Additionally, the sensing network integrated by the sensors also realized mapping and identifying spatial pressure distribution. Our method to construct the wide-range and high-sensitivity piezoresistive pressure sensor is facile, cost-effective, and available for mass production. The findings provide a new direction to fabricate the new-generation high-performance sensors for healthcare, interactive wearable devices, electronic skin, and smart robots.
研究领域:
材料科学
·
可穿戴传感器
·
柔性电子学
·
生物医学工程
·
人机交互
✓ 已验证
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Feng Ji,Yingying Zeng,Qingyu Yu,Junqiu Zhu,Jing Xu,Jiangbin Guo,Qiliang Zhou,Shuiyuan Luo,Junjie Li
Recently, conductive hydrogels have gained great attention in intelligent wearable devices , but the simultaneous realization of stretchability, transparency, anti-freezing, self-healing, and adhesion properties by an easy method is still a big challenge. Herein, a novel multifunctional organohydrogel based on noncovalent intermolecular interactions was developed by simply polymerization hydroxyethyl acrylamide (HEAA) in LiCl cryoprotectant/water (Cryo/water) solution via one-pot photo-polymerization method. Hydrogen bonding interactions of PHEAA-PHEAA and PHEAA-Cryo were the main driving force for gel formation. The LiCl and cryoprotectant gave PHEAA-Cryo-LiCl organohydrogel good conductivity and anti-freezing properties, respectively. The effects of the gel composition on the mechanical, transparency, anti-freezing, and conductivity properties of PHEAA-Cryo-LiCl organohydrogels were researched in detail. Moreover, poly(hydroxyethyl acrylamide)-glycerin-lithium chloride (PHEAA-Gl-LiCl) organohydrogel displayed good self-healing and adhesion properties owing to the reversible hydrogen bonding. Based on PHEAA-Gl-LiCl organohydrogel, a strain sensor was prepared for detecting human movements within a wide temperature range (−40 °C–25 °C), and the result showed various human motions could be detected stably, including joint movement, making a fist, swallowing or pronouncing, suggesting the potential application for the next generation of intelligent wearable sensors.
研究领域:
材料科学
·
高分子化学
·
柔性电子学
·
可穿戴传感器
·
软体机器人
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Zhao Li,Xiaoming Qi,Lu Xu,Haohao Lu,Wenjun Wang,Xiaoxiong Jin,Zahidul Islam Md,Yaofeng Zhu,Yaqin Fu,Qingqing Ni,Yubing Dong
Flexible strain sensors have shown great application value in wearable devices. In the past decades, researchers have spent numerous efforts on developing high-stretchability, excellent dynamic durability, and large linear working range flexible strain sensors and shaped a series of important research results. However, the viscoelasticity of the elastic polymer is always a big challenge to develop a flexible sensor. Here, to overcome this challenge, we developed a novel self-repairing carbon nanotubes/ethylene vinyl acetate (CNTs/EVA) fiber strain sensor prepared by embedding the CNTs on the surface of the swollen shape memory EVA fiber via the ultrasonic method. The CNTs/EVA fiber strain sensors responded with significant results, with high stretchability (190% strain), large linear working range (up to 88% strain), excellent dynamic durability (5000 cycles), and fast response speed (312 ms). In addition, the permanently damaged conductive network of the strain sensors, caused by the viscoelasticity of elastic polymer, can restore above the transforming temperature of the shape memory CNTs/EVA fiber. Moreover, the performance of the restored strain sensors was almost as same as that of the original strain sensors. Furthermore, human health monitoring tests show that the CNTs/EVA fiber has a broad application prospect for human health monitoring in wearable electronic devices.
研究领域:
材料科学
·
柔性电子学
·
可穿戴传感器
·
纳米复合材料
·
智能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Kun Qi,Hongbo Wang,Xiaolu You,Xuejiao Tao,Mengying Li,Yuman Zhou,Yimin Zhang,Jianxin He,Weili Shao,Shizhong Cui
Highly sensitive wearable textile pressure sensors represent the key components of smart textiles and personalized electronics, with potential applications in biomedical monitoring, electronic skin, and human-machine interfacing. Here, we present a simple and low-cost strategy to fabricate highly sensitive wearable textile pressure sensors for non-invasive human motion and physiological signal monitoring and the detection of dynamic tactile stimuli. The wearable textile sensor was woven using a one-dimensional (1D) weavable core-sheath nanofiber yarn, which was obtained by coating a Ni-coated cotton yarn electrode with carbon nanotube (CNT)-embedded polyurethane (PU) nanofibers using a simple electrospinning technique . In our design, the three-dimensional elastic porous nanofiber structure of the force-sensing layer and hierarchical fiber-bundled structure of the conductive Ni-coated electrode provide the sensor with a relatively large surface area, and a sufficient surface roughness and elasticity. This leads to rapid and sharp increases in the contact area under stimuli with low external pressure. As a result, the textile pressure sensor exhibits the advantages of a high sensitivity (16.52 N −1 ), wide sensing range (0.003–5 N), and short response time (~0.03 s). Owing to these merits, our textile-based sensor can be directly attached to the skin as usual and conformally fit the shape deformations of the body’s complex flexible curved surfaces. This contributes to the reliable real-time monitoring of human movements, ranging from subtle physiological signals to vigorous movements. Moreover, a large-area textile sensing matrix is successfully fabricated for tactile mapping of spatial pressure by being worn on the surface of wrist, highlighting the tremendous potential for applications in smart textiles and wearable electronics .
研究领域:
生物医学工程
·
柔性电子学
·
智能纺织品
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可穿戴传感器
·
人机交互
·
转化医学
✓ 已验证
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 8
·547
·
IF 2.5
Geriletu,Gu Hao
Flexible silicone materials have excellent elastic properties and can maintain excellent structural stability under high-intensity repeated deformation. They are ideal materials for preparing piezoresistive flexible sensors. However, traditional silicone materials exhibit strong insulation properties. The solid block structure is also not conducive to improving sensitivity. Inspired by the irregular hole structure of Taihu Lake stone, this paper prepared a porous silica gel skeleton (rGO/CTAB/SG) based on reduced graphene oxide film coating, which was equipped with flexible interdigital electrodes to achieve electrical signal derivation. The “honeycomb” shaped sensing module prepared in this way achieves an extremely wide elastic deformation range (20-200%). In the pressure feedback layer, the rGO film is evenly coated on the SG surface, which greatly improves the device conductivity and sensing performance (high sensitivities of 89.4 kPa − 1 and 25.4 kPa − 1 are achieved within 0-30.2 kPa and 30.2–42 kPa, ultra-high durability under more than 22,000 load-unload cycles.) Numerical simulation analysis results confirmed that the structure of the flexible substrate SG prepared by this method maintained well when extreme deformation occurred, and no fracture or stress concentration occurred. As an elastic sensor, after being integrated with a microprocessor, it can easily monitor and analyze human body movement in real time. It has huge potential in areas such as daily training and health monitoring of athletes.
研究领域:
生物医学工程
·
柔性电子
·
运动医学
·
可穿戴传感器
·
力学传感
·
功能材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaodi Zhong,Tao Song,Haoran Dong,Saihua Jiang,Ruichao Wei
Currently, wearable sensors have been widely used for human behavior monitoring. Among them, triboelectric nanogenerator (TENG) textile has the functions of power generation and active sensing, showing great advantages in energy collection and signal transmission. However, the TENG textiles face problems such as limited recognition accuracy, insufficient flexibility, missed fashion sense, and complex manufacturing processes. To address the above issues, a core–shell structure integrated conductive fiber (C-fiber) based on ionogel and a hollow silicone tube are displayed. Owing to the fact that the C-fiber can be synthesized through a simple one-step UV curing process, it has the potential for large-scale production. Due to the dyeability of ionogel and the transparency of hollow tube, the C-fiber has the ability to obtain personalized colors. This fiber can be further woven into a flexible fabric sensor (W-TENG) for high-precision human behavior monitoring. Noteworthiness, the W-TENG still has flexibility and output signal in environments ranging from −18 to 200 °C,the strong wide temperature adaptability stem from the heat and frost resistance of the materials. By assembling W-TENG onto the human body, daily movements, fall types, and post fall states can be perceived. Furthermore, complex motion data is trained by support vector machine (SVM), and the recognition accuracy for different fall categories can reach 100%. In practical applications, TENG could be equipped with custom bluetooth modules to monitor falls in real-time during walking, and provide timely treatment for the injured.
研究领域:
生物医学工程
·
柔性电子学
·
可穿戴传感器
·
人机交互
·
运动健康监测
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Zhihui Qin,Shide Liu,Jiahui Bai,Juanjuan Yin,Na Li,Tifeng Jiao
Ionically-conductive hydrogels are attracting increasing interest as skin-like sensors, however, the fabrication of ion-conductive hydrogels with excellent mechanical properties, high conductivity, self-adhesion and anti-freezing ability for high-performance sensors remains a challenge. Herein, a highly ion-conductive hydrogel is prepared by introducing LiCl into polyacrylamide/hydroxypropyl methyl cellulose (PAM/HPMC) composite hydrogel. The introduction of LiCl simultaneously endows the PAM/HPMC/LiCl hydrogel with outstanding stretchability (1453 %), high tensile strength (135 kPa), skin-like elasticity (9.18 kPa), high conductivity (7.85 S/m), good adhesiveness and wide operating temperature range. Impressively, this ion-conductive hydrogel can be utilized in skin-like sensor, which achieves high strain sensitivity (GF = 11.19) with wide sensing ranges (up to 600 %), and excellent endurance over 250 consecutive stretching. As a result, the wearable sensor assembled from the hydrogels can be used to detect complex human activities with high stability even at −40 °C. This work promotes the development of ion-conductive hydrogels with broad operating temperature in advanced sensory platform.
研究领域:
材料科学
·
柔性电子学
·
可穿戴传感器
·
聚合物水凝胶
·
软体机器人
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）