Advanced Energy Materials
·
2024
·
IF 24.4
Hao Chen,Jun-Lin Zhan,Huan Xia,Jia-Ning Li,Ze-Hui Chen,Ming-Yang Geng,Hong-Tu Qu,Xin-Yu Lv,Chao Zhang,Lu Ju,Tong-Shuai Sun,Bu-Yun Yu,Zheng-Hao Kou,Wen-Zhe Song,Wei Zhang,Zheng-Ming Sun,Wei-Bing Lu
The demand for wearable monitoring devices in contemporary medicine has significantly increased, especially in dynamic environments where traditional bulky equipment is impractical. Conventional flexible wearable devices or systems suffer from limited air and moisture permeability, lack of stretchability, and high power consumption, which restrict their long-term usage and comfort. Herein, a stretchable and breathable backscattered monitoring system (SBBMS) is introduced, integrated with a fabric substrate. To address the challenges associated with fabric substrate system fabrication and encapsulation, a printing-cutting-transfer technology is proposed. This method enables the creation of unique, low-cost, high-precision, and robust circuit routing and electronic devices on fabric, maintaining high compatibility with commercial surface mounting technology while minimizing sacrifices in breathability. Additionally, a backscatter communication mechanism is designed and implemented to achieve wireless data transmission, which significantly reduces power consumption. Combined with energy management technology and hydrogel batteries, the SBBMS receives safe, multi-source, and eco-friendly energy support. Furthermore, through meticulous design, all modules—including the antenna, circuit, and battery—are made stretchable, providing the system with excellent strain-resistive performance. The approach paves the way for the development of breathable, high-performance, and highly integrated fabric-based wearable systems, catering to specific user groups such as athletes, soldiers, and pilots.
研究领域:
生物医学工程
·
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Virtual and Physical Prototyping
·
2020
·
IF 7.31
Binbin Guo,Xinzhu Ji,Xiaoteng Chen,Gang Li,Yongguang Lu,Jiaming Bai
One common issue when implementing wearable strain sensors for health-monitoring is the limited service time when they are inevitably subjected to mechanical operation in practical applications. Therefore, integrating multi-functionality with reliable performance is a long-term pursing target. To this end, we have developed a promising strain sensor utilising a facile 3D printing technology of digital light processing (DLP), thereby simultaneously realising super-high stretchability and intrinsic self-healing ability. Owing to the incorporation of carboxyl multi-walled carbon nanotubes (c-CNTs), the over-curing of the N-acryloylmorpholine (ACMO) resin was adequately mitigated, and good electrical conductivity of the nanocomposite was obtained. On the basis of multi-functionality, the strain sensor before and after self-healing can be applied for real-time and accurate detection of human activities. Therefore, it is expected that the highly stretchable and intrinsically self-healing strain sensor will have promising applications in wearable electronics, personal health care, etc.
研究领域:
材料科学
·
生物医学工程
·
可穿戴设备
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Tingrui Lin,Shuangxiao Li,Yang Hu,Lang Sheng,Xibang Chen,Xueyan Que,Jing Peng,Huiling Ma,Jiuqiang Li,Maolin Zhai
A novel agarose/Ti 3 C 2 T x -crosslinked-polyacrylamide (AG/T-PAM) double-network (DN) hydrogel is synthesized by combining heating-cooling and γ-ray radiation-induced polymerization. The AG/T-PAM DN hydrogel possesses excellent mechanical properties with 4250% stretchability, and good adhesion to different substrates, such as an adhesive strength of 1148 kPa to copper at 30 °C. The resultant hydrogel also exhibits excellent tensile and compression sensing properties due to the variation of conductive network within hydrogel. The flexible and wearable strain sensor composed of the AG/T-PAM DN hydrogel presents rapid response to strain withstand 1000 cycles, and can monitor various movements of human body with a high sensibility. The AG/T-PAM DN hydrogel-based strain sensor will have broad application in large-scale strain detection scenarios requiring high sensitivity and adhesion.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jin-Qi Xie,Jing Tian,Lingjie Mao,Humeizi Cao,Xinyi Duan,Lingsisi Li,Lang Shi,Yaqiang Ji,Xian-Zhu Fu
Printable, stretchable, and highly conductive metal conductors have emerged as potentially promising interconnects in the field of soft electronics. However, current techniques relying on geometric engineering have been criticized for complicated fabrication process and defective geometric structure. Here, we report a printed, straight, and omnidirectionally stretchable copper conductor, which is facilely fabricated on a flat substrate without requiring prestretching, assisted by a multifunctional gel medium layer. The PSS gel, composited by polydimethylsiloxane, Schiff base and fumed SiO 2 , offers a unique combination of stretchability, printability, and moldability. Additionally, this gel enables the reduction of silver ions directly on its surface by partially bonded crosslinker molecules. The fully exposed catalyst exhibits excellent activity in catalyzing electroless copper deposition reaction, on which high-quality copper coating is facilely achieved. The produced copper patterns exhibit high conductivity (4.93 × 10 7 S m −1 ) and excellent stretchability with fracture strains of ∼ 191 % and ∼ 135 % for the uni- and omni-directionally stretchable patterns respectively, which are superior to the majority of stretchable metals in published literature. The stretchable wrinkles derive form the gel medium layer molded by templates, realizing straight metal lines on flat substrate. This process combines the advantages of traditional in-plane and out-of-plane strategies, demonstrating great potential in practical application.
研究领域:
材料科学
·
柔性电子
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuecong Luo,Qiannian Yang,Minzhang Chen,Kaixiang Long,Cuicui Su,Jingxing Li,Mingkun Huang,Ang Lu,Shishang Guo
Liquid metal (LM) can serve as functional fillers, initiators, and cross-linkers for hydrogels. However, the high surface energy of LM makes it difficult to disperse uniformly and stably in the hydrogels. In this work, multi-walled carbon nanotubes (MWCNT-80) modified with the surfactant Tween 80, along with hyaluronic acid (HA), were employed to collectively stabilize LM to form LM complex for initiating the polymerization of vinyl monomers. The LM complex was used as a conductive filler, which not only enhanced the mechanical properties of the hydrogel, but also initiated free radical polymerization of the monomer. The prepared liquid metal conductive hydrogel (LMCH) has excellent stretchability (1192 %), adhesion (15.3 kPa) and conductivity (0.78 S/m). This LMCH hydrogel was further applied in the construction of multifunctional sensors. On one hand, strain sensors constructed with this hydrogel could monitor extensive joint range movements in real-time. On the other hand, a flexible triboelectric nanogenerator (L-TENG) constructed with the hydrogel as an electrode was employed for self-powered sensing. When integrated with a Microcontroller Unit (MCU), the joint training status of individuals can be transmitted in real-time to a mobile phone, allowing for the quantification and monitoring of human activities. This study presents a novel approach to the development of hydrogels for multifunctional sensors, and the prepared hydrogel holds significant potential in the fields of rehabilitation training and human–machine interaction.
研究领域:
材料科学
·
生物医学工程
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 5
·369
·
IF 5.3
Limei Zhang,Hong Li,Zhiquan Li,Weimin Pan,Yi Men,Niankun Zhang,Jing Xu,Xuewei Liu
As conductive materials, ionogels have attracted significant attention for their potential applications in flexible wearable electronics. However, preparing an ionogel with mechanical properties akin to human skin while also achieving transparency, adhesion, and low hysteresis through simple processes remains challenging. Here, we introduce a multifunctional ionogel synthesized via a one-step photopolymerization method. By leveraging the good compatibility between the ionic liquid and the polymer network, as well as the hydrogen bonding and chemical crosslinking within the gel network, we achieved an ionogel with high transparency (>98%), stretchability (fracture strain of 19), low hysteresis (<5.83%), strong adhesion, robust mechanical stability, excellent electrical properties, a wide operating temperature range, and a tunable modulus (1–103 kPa) that matches human skin. When used as a conductor in soft actuators, the ionogel enabled a large area strain of 36% and a fast electromechanical conversion time of less than 1 s. The actuator demonstrated good actuation performance with voltage and frequency dependence, electrochemical stability, and outstanding durability over millions of cycles. This study provides a simple and effective method to produce multifunctional ionogels with tailored mechanical properties that match those of human skin, paving the way for their application in flexible wearable electronics.
研究领域:
材料科学
·
柔性电子
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Wenwen Shi,Ruixue Wang,Pei Lyu,Jinfeng Zhang,Xin Guo,Xin Liu,Peng Wei,Dongzhi Chen,Weilin Xu
Photoluminescent fibers are widely used in smart textiles due to their excellent adaptability, flexibility, and energy-saving. However, the opaque matrix that may absorb the emitted light limits the color exhibition. Meanwhile, the insufficient stretchability and luminous stability hinder long-term practical applications. To solve the issues, a transparent polyurethane matrix is employed to design silicon nanocrystals-based photoluminescent fibers through continuous wet spinning. The polyurethane matrix possesses a high transparency of 89.1% at visible bands, facilitating the emission of silicon nanocrystals. The as-prepared photoluminescent fibers have a maximum stretchability of 1421.59% and high luminous stability within 365 days, which enables them to be arbitrarily weaved into functional textiles, and have long photoluminescence timeliness. The facile fabrication of luminescent silicon nanocrystals/polyurethane fibers may provide a groundbreaking strategy for realizing color-modulated functional wearables and flexible displays.
研究领域:
材料科学
·
纺织工程
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Ge Ren,Jiale Yang,Xuanting Wang,Guangmei Hu,Hua Chen,Qing Fang,Anneng Yang
Organic conductive polymers are driving the development of wearable electronics. However, most of the existing electrodes cannot be used for long-term biopotential monitoring due to their poor adhesion, stretchability, and biocompatibility. Here, a bioelectrode was designed by blending the organic semiconductor, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), with various additives, synergistically enabling its high stretchability, adhesion strength, and reduced interface impedance, which can be used for motion-artifact-tolerant recording of ECG signals with high quality. Then, a wearable and wire-free electrocardiogram (ECG) patch is developed by integrating the electrode with the flexible signal acquisition system, realizing long-term, imperceptible, and high-quality ECG monitoring with a high signal-to-noise ratio (38.85 dB). The patch can also be used for daily monitoring of cardiac diseases and sports training scenarios, which may fill the gap in the imperceptible biopotential monitoring area and would be of great value in the future of mobile health and wearable electronics.
研究领域:
生物医学工程
·
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xinyang He,Jiatai Gu,Yunna Hao,Maorong Zheng,Liming Wang,Jianyong Yu,Xiaohong Qin
Thermoelectric conversion technology provides a new method for directly collecting and converting the heat released by the human body to electrical energy, which has attracted extensive attention in the field of smart wearable electronics. However, current thermoelectric materials for wearable thermoelectric devices often face problems such as air impermeability, large volume, poor integration, and limited stretchability. Herein, an advanced fabrication approach combining coagulation-bath electrospinning and self-assembly strategies is proposed to efficiently and continuously fabricate CNT/PEDOT:PSS thermoelectric nanofiber yarns with high stretchability (∼350%) and seamability. During the spinning process, the nonsolvent induced phase separation and self-assembly effect result in a large amount of CNT/PEDOT:PSS loaded on each individual nanofiber. Since the thermoelectric material is loaded inside the yarn rather than simply coated on the surface, it exhibits excellent mechanical stability. In addition, based on the thermoelectric effect and seamability of the yarns, they can be integrated into gloves and masks for cold/heat source identification and human respiration monitoring in self-powered mode. Moreover, the self-powered strain sensor composed of the yarn shows corresponding thermovoltage changes for different strains, which can be used to optimize basketball players’ shooting percentage. These unique features make the thermoelectric nanofiber yarn show broad prospects in smart wearable fields such as wearable generators, breathing monitoring, and exercise optimization.
研究领域:
材料科学
·
智能可穿戴设备
·
能源技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 87
·55418-55426
·
IF 3.108
Meiling Chen,Nesren A. H. Saada,Fei Liu,Haining Na,Jin Zhu
Lauric diacid (LCDA), also known as 1,12-dodecanedioic acid, is used to develop a series of copolyesters along with 1,4-cyclohexanedicarboxylic acid (CHDA) and 1,4-butanediol (BDO). The resulting poly(butylene lauric dicarboxylate-co-butylene 1,4-cyclohexanedicarboxylate) (PBLC) is proved to be a random copolyester with three triad sequences. When the LCDA content increases from 20 to 60 mol%, Tm of the copolyester decreases from 133 to 57 °C. At the same time, the tensile modulus and strength decrease from 94 and 14 MPa to 40 and 5 MPa, respectively. Moreover, the elongation at break also drops from 640 to only 50%. However, further increasing the LCDA content to 80 mol%, the copolyester becomes amorphous with no Tm, and its tensile modulus, strength, and the elongation at break all improve significantly to 68 and 7 MPa, and over 1400%, respectively. More importantly, for the homo-polymer poly(butylene lauric dicarboxylate) (PBL), it has a relatively high Tm of 73 °C compared to that of polycaprolactone (PCL), but lower tensile modulus and strength, and significantly higher ductility, compared to those of PCL, linear low density polyethylene, and polybutylene succinate.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Qinhua Wang,Xiaofeng Pan,Changmei Lin,Dezhi Lin,Yonghao Ni,Lihui Chen,Liulian Huang,Shilin Cao,Xiaojuan Ma
Gel-based strain sensors have great potential in the fields of motion detection and real-time healthcare. Nevertheless, the relatively low strain sensitivity and inferior anti-freezing property limit the utilization of these sensors. In this work, a novel multifunctional organohydrogel sensor was developed based on a poly (acrylic acid) (PAA) skeleton with poly (3,4-ethylenedioxythiophene): sulfonated lignin (PEDOT:SL) as the conductive material and a water/glycerol binary solvent as the dispersion medium. The conductive, self-wrinkled, soft and elastic properties endue the organohydrogel sensor with a superior gauge factor (GF) of up to 7 (strain: 100%), while the freezing tolerance of the water/glycerol solvent endows the organohydrogel with an excellent anti-freezing property. The organohydrogel sensor senses not only the movement of limbs, but also a weak pulse and throat vibrations. Moreover, physiological signals such as those used for electrocardiography (ECG) and electromyography (EMG) can be readily detected. In addition, the cell culture test shows that the organohydrogel is nontoxic, and the animal experiments demonstrate that the organohydrogel can protect skin from frostbite. Overall, this work presents a new concept to use lignin for conductive PEDOT polymerization and integrates the fabrication of conductive organohydrogel materials for precise strain sensing.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2021
·Vol. 27
·期 52
·13161-13171
·
IF 5.236
Chunxiao Chai,Mengjiao Yi,Zhuo Zhang,Zhaohui Huang,Qi Fan,Jingcheng Hao
Graphical High stretchability (more than 1000 %) and conductivity (0.67 S/m) emulsion gels were fabricated from emulsions and the introduction of glycerol endowed them with broad operating temperature (−20 to 90 °C). The emulsion gel based strain sensors showed high sensitivity (gauge factor=6.240), fatigue resistance, self-healing and adhesion properties, realizing the repeatable and accurate detection of full-range human motions. Hydrogels with mechanical elasticity and conductivity are ideal materials in wearable devices. However, traditional hydrogels are fragile upon mechanical loading and lose functions in climate change because the internal water undergoes freeze and dehydration. Herein, we synthesize stable emulsions at high and low temperatures by introducing glycerol into the W/W emulsions. Then the high-stable emulsions are used as templates to produce the freestanding emulsion gels with enhanced mechanical strength and conductivity. The introduction of glycerol endows emulsions and emulsion gels with high and low temperature resistance (−20 to 90 °C). The fabricated strain sensors based on emulsion gels show high sensitivity (gauge factor=6.240), high stretchability (1081 %), fatigue resistance, self-healing and adhesion properties, realizing the repeatable and accurate detection of various human motions. These high-performance and eco-friendly emulsion gels can be promising candidates for next-generation artificial skin and human-machine interface.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）