Nanomaterials
·
2024
·Vol. 14
·期 10
·866
·
IF 4.4
Guiming Liu,Zhao Huang,Jiujie Xu,Bowen Zhang,Tiesong Lin,Peng He
In the evolving landscape of portable electronics, there is a critical demand for components that meld stretchability with optical transparency, especially in supercapacitors. Traditional materials fall short in harmonizing conductivity, stretchability, transparency, and capacity. Although poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) stands out as an exemplary candidate, further performance enhancements are necessary to meet the demands of practical applications. This study presents an innovative and effective method for enhancing electrochemical properties by homogeneously incorporating Ru(III) into PEDOT:PSS. These Ru(III) PEDOT:PSS complexes are readily synthesized by dipping PEDOT:PSS films in RuCl3solution for no longer than one minute, leveraging the high specific capacitance of Ru(III) while minimizing interference with transmittance. The supercapacitor made with this Ru(III) PEDOT:PSS complex demonstrated an areal capacitance of 1.62 mF cm−2at a transmittance of 73.5%, which was 155% higher than that of the supercapacitor made with PEDOT:PSS under comparable transparency. Notably, the supercapacitor retained 87.8% of its initial capacitance even under 20% tensile strain across 20,000 cycles. This work presents a blueprint for developing stretchable and transparent supercapacitors, marking a significant stride toward next-generation wearable electronics.
研究领域:
材料科学
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电子工程
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Chunhui Luo,Shuai Xie,Xinyue Deng,Yan Sun,Yong Shen,Menglu Li,Wenxin Fu
The applications of hydrogels can be greatly expanded by the improvement of extensibility and toughness. Despite remarkable efforts in tough hydrogels, little is known about the fracture strain above 100 mm/mm due to the inhomogeneous chemical networks and inefficient energy-dissipative mechanism. Herein, micelle-like aggregates were obtained from the self-assembly of dually alkyl-modified polyethylene glycol (PEG) in water, serving as dynamic junctions to fabricate hydrogel via the aqueous radical polymerization of acrylamide (AM) monomers in water with the assistance of methylene bisacrylamide. Unlike hairy micelles, interactions of aggregates and hydrogel framworks were improved obviously through pronounced entanglements between PEG and PAM macromolecules. Meanwhile, the reversible break/reformation of micelle-like aggregates upon stretching empowered the gel an efficient energy-dissipative mechanism. Therefore, hydrogels with extreme stretchability (tensile strain = 150 mm/mm) and high toughness (toughness = 24.8 MJ/m 3 ) were generated. Remarkably, their mechanics could be easily modulated by varying alkyl terminals and molecular weights of PEG to control the strength of hydrophobic domains and physical entanglements, respectively. Two examples were displayed: ultra-sensitive gels for wearable sensors and mechano-responsive molecule release. Impressively, the gauge factor was 60.29 under large deformation (strain > 20 mm/mm), outperforming most conductive hydrogels. As the first research to tune the macroscopic property of the hydrogel by delicately adjusting the microstructures of micelles, and interactions between micelles and gel network, this work not only expands the applications of soft materials but also sheds light on fabricating super-stretchable matters, making it promising candidates for flexible sensors, artificial skins, and drug delivery systems.
研究领域:
材料科学
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生物医学工程
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2025
·
IF 4.6
Yu Lin,Gen Li,Juan Teng,Haibo Wang,Ximei Liu
As a crucial component of flexible electronic devices, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)-based hydrogels for strain sensors have garnered extensive attention for their potential in the field of wearable sensors due to their inherent conductivity and flexibility. However, challenges such as poor mechanical strength, limited sensitivity, and poor durability have hindered the widespread application of PEDOT:PSS hydrogels in high-performance strain sensors. In this study, we develop a novel PEDOT:PSS-P(HEMA-co-AA) hydrogel that addresses common limitations in hydrogel applications, demonstrating remarkable stretchability, low hysteresis, and reliable conductivity. The hydrogel is synthesized using a semi-interpenetrating polymer network (SIPN) strategy, combining the linear conducting polymer PEDOT:PSS with a chemically cross-linked network based on 2-hydroxyethyl methacrylate (HEMA) and acrylic acid (AA). This hybrid structure notably contributes to the hydrogel's mechanical properties, achieving a stretchability of 195 %, while maintaining a rapid response time of 0.20 seconds and exceptional cyclic stability over 1000 cycles under 100 % strain. Moreover, the hydrogel demonstrates promising strain-sensing capabilities, positioning it as a strong candidate for future applications in wearable electronics and flexible sensors. The adoption of the SIPN strategy, along with the synergistic combination of PEDOT:PSS and P(HEMA-co-AA), paves a new pathway for enhancing the mechanical performance and sensing properties of hydrogels in strain-sensing technologies.
研究领域:
材料科学
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柔性电子
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生物医学工程
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产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 11
·2763
·
IF 3.426
Munir Hussain,Sohail Yasin,Hafeezullah Memon,Zhiyun Li,Xinpeng Fan,Muhammad Adnan Akram,Wanjie Wang,Yihu Song,Qiang Zheng
In this paper we designed greener rubber nanocomposites exhibiting high crosslinking density, and excellent mechanical and thermal properties, with a potential application in technical fields including high-strength and heat-resistance products. Herein 1-ethyl-3-methylimidazolium acetate ([EMIM]OAc) ionic liquid was combined with silane coupling agent to formulate the nanocomposites. The impact of [EMIM]OAc on silica dispersion in a nitrile rubber (NBR) matrix was investigated by a transmission electron microscope and scanning electron microscopy. The combined use of the ionic liquid and silane in an NBR/silica system facilitates the homogeneous dispersion of the silica volume fraction (φ) from 0.041 to 0.177 and enhances crosslinking density of the matrix up to three-fold in comparison with neat NBR, and also it is beneficial for solving the risks of alcohol emission and ignition during the rubber manufacturing. The introduction of ionic liquid greatly improves the mechanical strength (9.7 MPa) with respect to neat NBR vulcanizate, especially at high temperatures e.g., 100 °C. Furthermore, it impacts on rheological behaviors of the nanocomposites and tends to reduce energy dissipation for the vulcanizates under large amplitude dynamic shear deformation.Keywords:nitrile butadiene rubber;rheology;ionic liquids;tensile properties
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2024
·
IF 5.5
Ruirui Li,Jie Ren,Minmin Zhang,Meng Li,Yan Li,Wu Yang
Conductive hydrogels integrate the conductive performance and soft nature, which is like that of human skin. Thus, they are more suitable for the preparation of wearable human-motion sensors. Nevertheless, the integration of outstanding multiple functionalities, such as stretchability, toughness, biocompatibility, self-healing, adhesion, strain sensitivity, and durability, by a simple way is still a huge challenge. Herein, we have developed a multifunctional chitosan/oxidized hyaluronic acid/hydroxypropyl methylcellulose/poly(acrylic acid)/tannic acid/Al3+ hydrogel (CS/OHA/HPMC/PAA/TA/Al3+) by using a two-step method with hydroxypropyl methylcellulose (HPMC), acrylic acid (AA), tannic acid (TA), chitosan (CS), oxidized hyaluronic acid (OHA), and aluminum chloride hexahydrate (AlCl3·6H2O). Due to the synergistic effect of dynamic imine bonds between CS and OHA, dynamic metal coordination bonds between Al3+ and −COOH and/or TA as well as reversible hydrogen, the hydrogel showed excellent tensile property (elongation at break of 3168%) and desirable toughness (0.79 MJ/m3). The mechanical self-healing efficiency can reach 95.5% at 30 min, and the conductivity can recover in 5.2 s at room temperature without stimulation. The favorable attribute of high transparency (98.5% transmittance) facilitates the transmission of the optical signal and enables visualization of the sensor. It also shows good adhesiveness to various materials and is easy to peel off without residue. The resistance of the hydrogel-based sensors shows good electrical conductivity (2.33 S m–1), good durability, high sensing sensitivity (GF value of 4.12 under 1600% strain), low detection limit (less than 1%), and short response/recovery time (0.54/0.31 s). It adhered to human skin and monitored human movements such as the bending movements of joints, swallowing, and speaking successfully. Therefore, the obtained multifunctional conductive hydrogel has great potential applications in wearable strain sensors.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Saiyin Hou,Dong Lv,Yinghan Li,Zonglin Li,Mengmeng Liu,Xinhong Yu,Yanchun Han
Wearable dry electrodes are the foundation for the development of long-term, real-time biopotential monitoring devices. However, the physiological signals collected by common electrodes often accompany high noise and motion artifacts due to difficulties in conforming to skin deformations and poor contact between electrodes and skin. In contrast to them, PEDOT:PSS-based dry electrodes become a promising material with adjustable stretchability, conductivity, and adhesion properties to achieve high-quality signal delivery. Herein, we report a highly stretchable self-adhesive film prepared by the conductive polymers PEDOT:PSS, ethylene glycol (EG), poly(vinyl alcohol) (PVA), and d-sorbitol (SOR). In the blending system, SOR will disrupt the dense hydrogen bond interactions within PVA and PSS chains, while PEDOT:PSS/PVA physically cross-linked networks can dissipate strain energy, providing toughness to the films. In addition, the hydroxyl groups on the surface enable the film to be self-adhesive by forming hydrogen bonds with the N and O atoms of the skin stratum corneum. The blended electrode exhibits a conductivity of 200 S/cm and an elongation at break of 120%. Moreover, the electrical properties are still maintained after cyclic stretching (R/R0 ≈ 1.09). The maximum adhesion force of the film on glass and skin is 1.20 and 0.36 N/cm, respectively. The electrode has good biocompatibility, and its excellent stretchability and adhesiveness are conducive to comply with the skin deformation under different conditions. The contact impedance between dry electrodes and skin is only 77 kΩ cm2, which ensures the accurate monitoring of physiological signals including electromyogram (EMG) and electrocardiogram (ECG) during rest or exercise. The signal quality is significantly higher than that of standard Ag/AgCl electrodes. This highly stretchable self-adhesive dry electrode provides a feasible idea for the research of next-generation health monitoring devices.
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
He Xiangnan,Zhang Biao,Liu Qingjiang,Chen Hao,Cheng Jianxiang,Jian Bingcong,Yin Hanlin,Li Honggeng,Duan Ke,Zhang Jianwei,Ge Qi
Ionogels are promising material candidates for ionotronics due to their excellent ionic conductivity, stretchability, and thermal stability. However, it is challenging to develop 3D printable ionogels with both excellent electrical and mechanical properties. Here, we report a highly conductive and stretchable nanostructured (CSN) ionogel for 3D printing ionotronic sensors. We propose the photopolymerization-induced microphase separation strategy to prepare the CSN ionogels comprising continuous conducting nanochannels intertwined with cross-linked polymeric framework. The resultant CSN ionogels simultaneously achieves high ionic conductivity (over 3 S m −1 ), high stretchability (over 1500%), low degree of hysteresis (0.4% at 50% strain), wide-temperature-range thermostability (−72 to 250 °C). Moreover, its high compatible with DLP 3D printing enables the fabrication of complex ionogel micro-architectures with high resolution (up to 5 μm), which allows us to manufacture capacitive sensors with superior sensing performances. The proposed CSN ionogel paves an efficient way to manufacture the next-generation capacitive sensors with enhanced performance.
研究领域:
材料科学
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电子工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2025
·
IF 14.1
Zhikang Li,Bin Wang,Jijian Lu,Yumeng Xue,Jiaxiang Wang,Boqing Jia,Gengyu Han,Yihe Zhao,Muhammad Afzal Khan Qureshi,Lan Yu,Kang Zhao,Min Li,Ping Yang,Dejiang Lu,Libo Zhao
Constructing hydrogels with both remarkable mechanical and self-healing properties is highly desirable for soft electronics, yet remains challenging due to conflicting demands on chemical bonds and polymer chain mobility. Herein, a highly stretchable, self-healing, and conductive gelatin methacryloyl (GelMA) hydrogel is developed by incorporating polyvinyl alcohol, N-(2-amino-2-oxoethyl)-2-propenamide, sodium tetraborate, and sodium chloride into GelMA, followed by a two-step polymerization process. The introduced novel interpenetrating networks, hierarchical hydrogen bonds (weak and strong H-bonds), and borate ester bonds (BEBs) synergistically improve the mechanical strength, and concurrently function as sacrificial bonds for energy dissipation under deformation. Moreover, the constructed reversible BEBs and weak H-bonds enable autonomous self-healing at room temperature. The resulting hydrogel achieves remarkable stretchability (≈160%), tensile strength (≈130 kPa), and self-healing efficiency (86%), surpassing previously reported GelMA hydrogels. Importantly, a self-healing GelMA hydrogel strain sensor is demonstrated, featuring a high gauge factor (≈3.28), ultra-low detection limit (0.1%), and excellent recovery of sensitivity (≈100%) and detection range (≈75%) after damage. Successful monitoring of subtle and large-scale human motions with both original and healed sensors highlights the device's durability and longevity. This study provides a promising approach for the rational design and practical application of GelMA hydrogels in wearable bioelectronics.
研究领域:
材料科学
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生物医学工程
·
软体电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Qingye Liu,Jianfeng Zhang,Yarui Hou,Xiaohui Wang,Xiaojun Li,Tie Chen,Xiaojuan Xu
The traditional κ-carrageenan (κCG)-based hydrogel obtained from hot water can rupture easily under mechanical loading. To address this vulnerability, here we presented a robust all-κCG hydrogel without employing the second synthetic network. By simply regulating the polymer chains from random coil to stiff chain conformation in NaOH/urea solvent system via the freeze-thawing process, the as-prepared hydrogel with homogeneous structure can display an enhanced stretchability from 42.1 to 156 %, while maintaining the similar fracture stress. Moreover, upon the stepwise mechanical training and subsequent incubation in KCl aqueous solution, more helical segments of κCG were aligned and involved into the association domains, thus leading to the increment in both the crystallinity and anisotropy. Consequently, a fast self-strengthening behavior occurred, and a more stretchable (fracture strain up to 396 %), strong (stress ∼ 0.55 MPa) and tough (∼1.52 MJ m −3 ) κCG hydrogel was obtained. In comparison to the traditional one, the fracture strain and toughness are increased by 8.5 and 11.5 times, respectively. In addition, this κCG hydrogel can demonstrate good recovery and shape-memory behaviors under medium deformation. Hence, this tough all-κCG hydrogel is expected to be tailored into the biomaterials as the wearable device, artificial tendon, and cartilage in the future.
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
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Aizhao Pan,Yajie Zhou,Chunyu Zhao,Chengyu Shi,Youshen Wu,Yanfeng Zhang,Yi Liu,Ling He
All-inorganic lead halide perovskite nanocrystals (NCs) have received considerable attention due to their exceptional optoelectronic characteristics and photovoltaic performance, but their practical applications are restricted by their poor stability. Integrating multifunctionality such as high stability, outstanding flexibility, stretchability and self-healing capability has also been highly desired for flexible full-color displays, soft optical devices, and wearable applications. Here, we developed a facile one-pot photopolymerization strategy to produce highly stable self-healing CsPbBr 3 -based elastomers with outstanding flexibility, scalability, and stretchability. The obtained perovskite NCs (∼10 nm; PLQY of 78%) were capped and passivated with bifunctional methacrylic acid ligands, which provided free double bonds on their surface. The CsPbBr 3 -based elastomers were obtained via the photo-induced copolymerization of functionalized CsPbBr 3 NCs with methyl methacrylate (MMA) and n -butyl acrylate (BA) at room temperature. This yielded homogenous CsPbBr 3 nanocrystals (∼10 nm) dispersed in the copolymer, which displayed a high photoluminescence quantum yield (PLQY > 70%). Versatile and specific luminescent shapes and patterns could be fabricated from the CsPbBr 3 -based elastomers by regulating the constituent content, reaction time, or molding process. The obtained CsPbBr 3 -based elastomers exhibited high air and water stability, high stretchability (∼1300% elongation), tensile recovery (∼100%), and excellent self-healing capability, which also permitted twisting or bending. This facile photopolymerization strategy greatly expands the methods for fabricating highly stable perovskite materials with excellent stretchability and self-healing properties for use in flexible optoelectronic devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 41
·21923-21932
·
IF 14.511
Zhenyu Wang,JianFeng Fan,Dongyi He,Linlin Ren,Zhifeng Hao,Rong Sun,Xiaoliang Zeng
Thermally conductive polymer-based composites with the combination of superior stretchability, efficient self-healing, recyclability and high thermal conductivity have long been pursued in the modern electronics industry. However, integrating these attractive properties remains challenging due to the complexity of the composite structure and composition. In this work, by fabricating covalent adaptable networks and introducing supramolecular interactions, we prepared a poly(thioctic acid)/aluminum (poly(TA)/Al) composite elastomer. The prevalent supramolecular interactions provide the poly(TA)/Al with enhanced interfacial interaction and a stretchable covalent adaptable network, leading to superior stretchability (1640%), enhanced thermal conductivity (1.83 W mK−1) and excellent self-healing efficiency (96% and 98% at 80 °C for tensile elongation and thermal conductivity, respectively). Moreover, the dynamically reversible covalent adaptable network ensures solid-state plasticity and thermally induced recyclability of the poly(TA)/Al, which can maintain desirable mechanical and thermal conductivity. The current work provides a practical method to design thermally conductive self-healing composites with stretchability and recyclability, which are needed for the heat dissipation of advanced electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Peihe Wang,Hongyan Ding,Xiaofeng Li,Yangchengyi Liu,Yi Sun,Yujing Li,Guozhuang Xu,Shangda Chen,Xiufeng Wang
The slippage of moisture-sensitive materials from substrates during bending or stretching is a common issue that causes baseline drift and even failure of the flexible humidity sensors, which are essential components of wearable electronic devices. In this study, we report a stretchable, self-adhesive, and transparent humidity-sensing electronic patch comprising liquid metal particle electrodes with a stretchable serpentine structure and a humidity-sensing layer made of Ti3C2Tx MXene/carboxymethyl cellulose. This patch is constructed on a soft–hard integrated heterostructure substrate and demonstrates stable humidity-sensitive response performance at 100% tensile strain, along with autonomous adhesion to human skin. Additionally, it exhibits maximum response (1145.4%) at 90% relative humidity (RH), fast response and recovery time (1.4/5.9 s), elevated sensitivity (64.63%/% RH), and preserved humidity sensing under deformation, as well as easy scalability for multiplexed detection. We further illustrate the patch’s potential applications in healthcare and environmental monitoring through a non-contact security door control system and wind monitor system. Our proposed strain-isolation strategy can be extended to other rigid conductive materials and stretchable substrates, providing a feasible mechanism for producing stretchable electronic skin patches.
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
危险品化学品经营许可证（带存储）