Small
·
2024
·
IF 13
Luyao Zhan,Wanxuan Xu,Zixi Hu,Jiayin Fan,Luping Sun,Xingchi Wang,Yingying Zhang,Xiaodi Shi,Bin Ding,Jianyong Yu,Ying Ma
Responsive thermochromic fiber materials capable of miniaturization and integrating comfortably and compliantly onto the soft and dynamically deforming human body are promising materials for visualized personal health monitoring. However, their development is hindered by monotonous colors, low-contrast color changes, and poor reversibility. Herein, full-color “off–on” thermochromic fluorescent fibers are prepared based on self-crystallinity phase change and Förster resonance energy transfer for long-term and passive body-temperature monitoring, especially for various personalized customization purposes. The off–on switching luminescence characteristic is derived from the reversible conversion of the dispersion state and fluorescent emission by fluorophores and quencher molecules, which are embedded in the matrix of a phase-change material, during the crystallizing/melting processes. The achievement of full-color fluorescence is attributed to the large modulation range of fluorescence colors according to primary color additive theory. These thermochromic fluorescent fibers exhibit good mechanical properties, fluorescent emission contrast, and reversibility, showing their great potential in flexible smart display devices. Moreover, the response temperature of the thermochromic fibers is controllable by adjusting the phase-change material, enabling body-temperature-triggered luminescence; this property highlights their potential for human body-temperature monitoring and personalized customization. This work presents a new strategy for designing and exploring flexible sensors with higher comprehensive performances.
研究领域:
材料科学
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生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2017
·Vol. 5
·期 4
·637-642
·
IF 4.136
Zhaohan Hao,Feng Tao,Zhikui Wang,Ximing Cui,Qinmin Pan
Graphical Self-help : An omni-healable aqueous lithium-ion battery, fabricated by integrating all of the electroactive components into polymer networks cross-linked through dynamic borate ester bonding, can self-repair its electrodes and electrolyte simultaneously after mechanical breakage. It can also be tailored into complicated patterns without significant deterioration in lithium-storage properties. Reliability and safety are critical issues for portable power sources aiming for next-generation electronics. However, most lithium-ion batteries (LIBs) will fail to work or will cause safety problems after physical damage or violent deformation. Here, an omni-healable aqueous LIB, which can self-repair its electrodes and electrolyte simultaneously after mechanical breakage, is fabricated by integrating all of the electroactive components into polymer networks cross-linked by dynamic borate ester bonding. Once suffering from repeated cutoffs, the battery quickly recovers its configuration integrity as well as mechanical and electrochemical properties autonomously without external stimuli. Furthermore, the battery can also be tailored into complicated patterns while maintaining its lithium-storage properties. The present investigation offers a strategy to design a smart and sustainable energy-storage device that has potential applications in wearable/flexible electronics, flexible robot or intelligent apparel, and so on.
研究领域:
材料科学
·
能源存储
·
智能设备
✓ 已验证
DOI
高影响因子
Advanced Materials Technologies
·
2023
·Vol. 8
·期 18
·2300548
·
IF 6.8
Zongwen Zhang,Chunhui Wang,Yuanping Luo,Changxin Yuan,Wanbiao Hu
It is important but challenging to develop high-performance electromagnetic interference (EMI) shielding materials with customizable structures, tailorable properties, light weight, and high-efficiency EMI shielding effectiveness (SE). Herein, a facile approach is proposed to customize aramid nanofiber (ANF) based EMI shielding aerogels with pre-designed architectures through ultra-malleable ANF jellies. By precisely regulating the interfiber interactions between ANF and constructing a robust 3D skeleton, ANF jelly can be ‘kneaded-frozen-heated’ like dough to produce ultralight, elastic and porous ANF aerogels with special structures, such as aerogel sandwich, spring, fabric, etc. Benefiting from the interconnected porous structure, conductive fillers such as silver nanowires (AgNW) can easily cover the aerogel skeleton by dip-coating to form highly conductive paths. With an ultra-low loading (7.5 wt.%) of AgNW, a 5.2 mm-thick AgNW/ANF aerogel exhibit an average EMI SE of 75.4 dB in the X-band. Aerogels with additional functions can be customized according to the actual application environment. A customized sandwich aerogel with fire-retardant outerlayer and EMI shielding interlayer can be used in high-temperature environments. A flexible aerogel fabric as an EMI shielding gasket can effectively block wireless power transmission. This work provides a forward-looking strategy for constructing high-performance EMI shielding materials with tailored properties.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Jiabei Luo,Chuanyue Sun,Boya Chang,Bin Zhang,Kerui Li,Yaogang Li,Qinghong Zhang,Hongzhi Wang,Chengyi Hou
To achieve accurate monitoring of bioelectrical signals, it is essential to use customizable bioelectrodes that can self-adapt to the skin's surface topography. Ion-conducting hydrogel has received significant attention in this field due to its softness, adhesion, and skin-like mechanical properties. However, these bioelectrodes currently suffer from degradation of adhesion, electrical conductivity, and skin-compliance when exposed to aqueous environments. This significantly limits the application of bioelectrodes. Herein, a customizable biohydrogel that can be applied on skin or fabric by solvent volatilization for liquid ink-gel film conversion is reported. The biohydrogel's distinct characteristic of transitioning between a liquid and hydrogel phase establishes superb conformal contact and dynamic compliance with the epidermis. This effectively eliminates motion artifacts and results in lower contact impedance and noise in both static and dynamic states when compared to existing bioelectrodes. The biohydrogel is applied to the cotton fabric to create electrocardiogram (ECG) monitoring garments. These garments enable the acquisition of ECG signals with high accuracy in aqueous environment for over 72 h. Besides, the biohydrogel-based garments outperform the commercial gel electrodes by 83.5% in signal-to-noise ratio. Additionally, the cotton/biohydrogel electrode facilitates multi-channel, high-fidelity recording of ECG signals, enabling high-performance capture and classification of ECG waveforms across multiple channels.
研究领域:
生物医学工程
·
材料科学
·
电子皮肤
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 16
·1910723
·
IF 16.836
Xingyi Dai,Long-Biao Huang,Yuzhang Du,Jiancheng Han,Qiuqun Zheng,Jie Kong,Jianhua Hao
Self-healing triboelectric nanogenerators (TENGs) with flexibility, robustness, and conformability are highly desirable for promising flexible and wearable devices, which can serve as a durable, stable, and renewable power supply, as well as a self-powered sensor. Herein, an entirely self-healing, flexible, and tailorable TENG is designed as a wearable sensor to monitor human motion, with infrared radiation from skin to promote self-healing after being broken based on thermal effect of infrared radiation. Human skin is a natural infrared radiation emitter, providing favorable conditions for the device to function efficiently. The reversible imine bonds and quadruple hydrogen bonding (UPy) moieties are introduced into polymer networks to construct self-healable electrification layer. UPy-functionalized multiwalled carbon nanotubes are further incorporated into healable polymer to obtain conductive nanocomposite. Driven by the dynamic bonds, the designed and synthesized materials show excellent intrinsic self-healing and shape-tailorable features. Moreover, there is a robust interface bonding in the TENG devices due to the similar healable networks between electrification layer and electrode. The output electric performances of the self-healable TENG devices can almost restore their original state when the damage of the devices occurs. This work presents a novel strategy for flexible devices, contributing to future sustainable energy and wearable electronics.
研究领域:
材料科学
·
纳米技术
·
可穿戴设备
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Bingxin Liu,Jianzhi Liu,Yueqin Yu
In view of global warming and following fossil energy consumption caused by the using of heavy-loaded air conditioners, smart windows, which can intelligently regulate solar radiation, became a highly anticipated strategy to slow down the pressure. As most of the traditional hydrogel-based smart windows abruptly switch between transparent and opaque making a sudden change in temperature and light, we established a poly- N -isopropylacrylamide (PNIPAM) thermo-responsive hydrogel system with additional cross-linking of chitosan and Al 3+ , which exhibited a smooth thermo-response during heating and a novel recovery hysteresis during cooling. By enabling additional gentle transition in translucency, we are able to retain a comfortable indoor temperature/lightness balance during an increase in outdoor temperature, in avoidance of sudden indoor darkness at elevated temperature. By enabling additional control in the thermo-response hysteresis, this methodology provides a solution to continuously shield the dazzling afternoon sunshine until a comfortable outdoor temperature is reached. And the response degree and response temperature can be adjusted by the contents of chitosan and Al 3+ , respectively, so that the material can be customized personally. Moreover, we discovered that the hydrogel-based smart window system constructed by this methodology bears notably enhanced strength, toughness and conductivity, making it a comprehensively promising candidate for customizable smart windows.
研究领域:
材料科学
·
能源效率
·
智能材料
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2023
·Vol. 16
·期 6
·2494-2504
·
IF 32.5
Nan He,Haonan Wang,Fan Li,Bo Jiang,Dawei Tang,Lin Li
Hydrovoltaic electricity generators (HEGs), powered by ubiquitous water evaporation, are emerging due to their high spontaneity and continuity. However, the current performance of most HEGs is restricted to 50.00 μA cm−2, far from commercial applications. Herein, we propose an ion-engine HEG by establishing a concentration gradient of an ionisation group in hydrogels along the direction of ion migration. The distinctively designed ion gradient acts as an engine to accelerate ion migration by enhancing diffusion, hence increasing the generated current. Notably, the ion-engine HEG generates a record-breaking current density of 466.75 μA cm−2, 10 to 100 times higher than those of previously reported HEGs. The ion-engine HEG possesses the lowest internal resistance, which is the closest to that of commercial products. In addition, the high transparency, flexibility, and customisability of hydrogels offer HEGs a wide range of applications, such as night-time lighting, sweat monitoring, and powering small unmanned boats. These findings provide a fresh perspective on high-performance HEGs, which have great potential to serve energy technology and intelligent life.
研究领域:
能源技术
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Yongliang Ding,Chengxin Zhang,Bingbing Shi,Yiyun Wang,Pengfei Tang,Cheng Liu,Jingjing Fan,Zhongkai Wang,Feng Jiang
Degradable polymers typically require prolonged exposure to harsh conditions for degradation, but this extended duration and severe treatment often result in incomplete breakdown, leading to the formation of harmful microplastics that pose significant environmental pollution risks. In this work, degradable alternating polyamide hard segments and soft crystallizable segments were combined by amide groups to design thermoplastic bio-based polyesteramide elastomers (PEAEs) with customizable properties and rapid degradability. The hard segment of the polymer features an alternating arrangement of amide and ester bonds. This arrangement facilitates the formation of small molecule monomers when the ester bond is broken, preventing microplastic contamination that may arise from incomplete degradation of the hard segment. Additionally, the inclusion of side groups in the soft segment disrupts the crystallization, enhancing its susceptibility to solvent penetration and thereby accelerating the degradation rate. After step-cyclic tensile tests, additional physical cross-linking points were formed in PEAEs to enhance their mechanical strength and elasticity. Furthermore, PEAEs demonstrated outstanding processing capabilities, including compounding, extrusion, pelletization, and spinning. This innovative approach introduces fresh design concepts for the industrial application of bio-based degradable polymers, playing a pivotal role in advancing resource conservation and environmental protection.
研究领域:
材料科学
·
聚合物化学
·
环境科学
·
生物降解材料
·
可持续工程
✓ 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）