Nano Energy
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2022
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IF 19.069
Yan Zhu,Yifan Xia,Min Wu,Wenyu Guo,Chunyang Jia,Xin Wang
Tremendous efforts in wearable optoelectronics have recently harnessed considerable advances in intrinsically stretchable electroluminescence (EL) devices. However, developing wearable optoelectronics that maintain long-term stability in harsh cold environments is still challenging. Here, a wearable, freezing-tolerant, and self-powered EL system is developed based on organohydrogel-based EL (OH-EL) device integrated with liquid electrolyte-based single-electrode triboelectric nanogenerator (LE-TENG), in which the OH-EL device based on self-healing and highly conductive organohydrogel electrodes can be directly lit by the LE-TENG. The stretchable OH-EL device demonstrates a bright and uniform light emission under 140% tension stretching as well as severe mechanical deformations of bending, rolling, and twisting. Moreover, the optical performances of the OH-EL device exhibit excellent repeatability and durability after continuous 2000 cycles. More importantly, bright blue-green light emission of the self-powered EL system stored at 253 K can maintain for six months, demonstrating extremely long-term freezing-tolerant capability. Furthermore, while harvesting the biomechanical energy of hand slapping and knee/elbow bending, the self-powered EL system worn on different parts of human body can achieve real-time visualized displays. Consequently, the simple fabrication and unique operation of the self-powered EL system demonstrate potential application in cold-resistant displays, wearable self-powered photoelectric devices, soft robotics, and other fields.
研究领域:
材料科学
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生物医学工程
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
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2022
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IF 3.662
Zi Wang,Min Huang
Conductive hydrogels were fascinating stretchable conductive materials that have found widespread application in electronic skin, wearable sensors and soft robots. Nonetheless, similar to conductive materials, conductive hydrogels experience severe performance degradation in strong UV environments and cold, dry climates, which severely restricts their practical applications. Using grape seed extract polymer (GSP), sodium chloride (NaCl), and a DMSO/ water binary solvent system, a type of hydrogel with a variety of fascinating multifunctional properties was quickly fabricated. The presence of GSP and NaCl endows hydrogel materials with remarkable UV-blocking (∼82%), DPHH radical scavenging ability (∼76.33%) and conductivity, allow them to be utilized as sensors. In addition, a DMSO/water binary solvent provides the hydrogel with superior long-term drying resistance and freezing tolerance, as well as excellent stretchability (>300%) and good conductivity even at − 23 °C. This work investigates the potential of dynamic plant catechol chemistry in the field of hydrogel materials and anticipates that it will enable flexible sensors capable of adjusting to a variety of complex environments.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
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2024
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IF 7.2
Zilong Zhu,Dongdong Lu,Mingning Zhu,Peng Zhang,Xiaodong Xiang
Gel-based wearable bioelectronic devices have garnered increasing attention due to their unique properties. However, developing multiple environmentally tolerant (resistant to freezing, drying, and various solvents) conductive gels presents a formidable challenge. Herein, we designed and developed a smart organogel exhibiting high stretchability (up to 550% strain and 19.3 kPa modulus), adhesion (24.8 kPa on pigskin), and resistance to freezing, drying, and various solvents. This achievement is attributed to the synergistic effects arising from the interplay between hydrophobic and hydrophilic polymer segments, the multiple bond interactions within a composite network, and the robust adhesion provided by catechol functional groups in binary solvent dispersion. Furthermore, after introducing hydroxyl-functionalized carbon nanotubes (CNTs) into the network, the organogels demonstrate high conductivity with satisfactory sensitivity (GF = 3.68), wide strain range (0.5–450%), and prominent signal stability. Meanwhile, benefiting from the nonswelling and antifreezing attributes, the obtained conductive organogel proves its versatility as an all-weather sensor. It can achieve accurate and reliable strain sensing in a wide temperature range of −20 to 50 °C and exhibits a high-precision Morse code to transmit information underwater. Moreover, it could also serve as soft bionic electrodes to integrate into a wearable wireless device for detecting human physiological signals underwater. This study provides an effective and versatile design strategy for developing future advanced gel-based sensors and soft bioelectronic devices with robust tolerance to diverse environmental conditions.
研究领域:
材料科学
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生物医学工程
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
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2025
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IF 4.7
Jie Lu,XiaoLong Zhu,Yuting Zhang,Fuyou Wang,Hui Xie,Lizhen Guo,He Liu,Xu Xu
Hydrogel electrolytes hold significant promise for flexible and wearable electronics but often suffer from limited ionic conductivity, poor mechanical integrity, and vulnerability to extreme environmental conditions. Herein, a cellulose-integrated conductive hydrogel electrolyte (MCBH-Zn) with outstanding mechanical strength and freeze resistance is reported. The MCBH-Zn hydrogel achieves a high compressive strength of 5.16 MPa and a tensile fracture stress of 312 kPa, enabled by the synergistic effects of a covalently cross-linked polyacrylamide (PAM) network, hydrogen bonding between PAM and cellulose, and coordination interactions between bentonite (BT) and cellulose. Additionally, it delivers excellent ionic conductivity of 88.9 mS cm–1 at room temperature and 27.3 mS cm–1 at −60 °C. Consequently, a flexible solid-state zinc-ion hybrid supercapacitor (MCBH-ZHSC) assembled with MCBH-Zn delivers stable electrochemical behavior across a wide temperature range and maintains a superior capacity retention of 93% after 10,000 cycles at 10.0 A g–1. Furthermore, the MCBH-Zn-based wearable device demonstrates self-sustained flexibility and efficient energy harvesting and conversion. This work offers a facile strategy for engineering high-performance hydrogel electrolytes tailored for next-generation wearable technologies.
研究领域:
材料科学
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高分子科学
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储能技术
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柔性电子学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yilin Lu,Yuanyuan Ning,Xin Wang,Dangfeng Wang,Likun Ren,Yang Jiang,Hongyan Guo,Kai Zhou,Xuepeng Li,Fangchao Cui,Tingting Li,Jianrong Li
Globally, billions of tons of food are lost or wasted annually due to microbial contamination. Hydrogels are a new type of fresh-keeping material because of their porous three-dimensional network structure, offering enhanced loading capacity. However, traditional hydrogel packaging materials often suffer from limitations such as poor frost resistance, lack of catalytic antibacterial activity, and low factory application rate. In this study, firstly, carbon dots (CPCDs) catalyzing oxygen under visible light irradiation with broad-spectrum antibacterial activity (The minimum photocatalytic antibacterial concentration of H. alvei and P. fluorescens was 62.5 μg/mL) were synthesized. A hydrogel was rapidly formed using polyvinyl alcohol (PVA) and gelatin within 14 min of one-time freezing at −20 °C through hydrogen bonds, and excellent photocatalytic antibacterial activity and timely preservation were achieved by loading CPCDs. The low swelling (3.0) of the hydrogel and a release rate of <20% reduced the loss of CPCDs, thereby achieving a sustained antibacterial effect. Additionally, In the DSC experiment, no significant peak was observed between −80 °C and − 20 °C. The hydrogel was not crystallized and maintained its flexibility, which proved that the hydrogel had good frost resistance. The hydrogel could be completely peeled off from the surface of the Oncorhynchus mykiss fillet with a force of <0.5 N without any residue. The hydrogel showed no significant cytotoxicity and could extend the shelf life of O. mykiss fillet by >3 days. These findings underscored the potential of the developed hydrogels as efficient materials for the rapid preservation of frozen seafood.
研究领域:
食品保鲜
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材料科学
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抗菌技术
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冷链运输
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纳米技术
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水产品贮藏
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Ruyue Guo,Yan Bao,Junbin Zhou,Jie Chen,Xinjie Li,Chao Liu,Wenbo Zhang
The synergistic advantages of high conductive and histology-like properties of hydrogel make it promising candidate for flexible electronic devices. However, it still remains huge challenge to build conductive hydrogel with high sensing performance and versatility. Herein, a platform of multifunctional organohydrogel was tailored by dual-mode conduction and tannic acid‑silver system, which demonstrated excellent mechanical, conductive, antibacterial, freezing tolerance, moisture retention and sensing capabilities. Thanks to the multiple energy dissipation by the synergistic effect between different components during deformation, the average stress and strain of organohydrogel were 6.18 ± 0.313 MPa and 695.15 ± 25.956 %, respectively. At the same time, the combination of tannic acid and silver guaranteed the antibacterial property of organohydrogel, which was an advantage as flexible sensor for long-term human-machine interface contact without worrying about bacterial growth. Moreover, the organohydrogel exhibited freezing tolerance and moisture retention performances based on the ability of water/glycerin binary solvents to inhibit ice crystal growth and water evaporation, laying the foundation for its long-term stability in harsh environments. In addition, the construction of dual-mode conduction and the corresponding structural changes of organohydrogel during deformation resulted in excellent average conductivity of 19.70 ± 0.145 S m −1 and strain sensitivity of 17.10. It enabled organohydrogel to act as flexible sensor to realize coding language communication, real-time monitoring of wrist pulse and collecting pressure information in space. In summary, a multifunctional organohydrogel was developed, which provided feasible and promising strategy for the enhanced performance and modified function of conductive hydrogel.
研究领域:
材料科学
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纳米技术
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生物医学工程
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柔性电子学
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传感器
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）