ACS Sensors
·
2025
·
IF 9.1
Xinyuan Ye,Leqi Li,Zonglei Wang,Yuli Wang,Jiawei Yang,Meiqiong Zheng,Mingzhe Wang,Zichong Ji,Shihong Lin,Yujie Zhang,Jian Luo,Junhong Yi,Pengcheng Zhou,Xuanwen Cao,Xuezhong He,Yan Wang
Long-term, high-fidelity electrophysiological monitoring requires epidermal electrodes that simultaneously offer conformability, breathability, and mechanical durability─attributes rarely achieved in current designs─through a scalable, simple, and low-cost fabrication strategy. We report a 5.2-μm-thick, transparent, air- and vapor-permeable “tattoo” electrode that adheres to the human skin through water-activated hydrogen bonding provided by a NaCl/glycerol/water hydrating solution, echoing the mechanism of temporary tattoos. The fabrication process is easy, efficient, and scalable. The device consists of a poly(vinyl alcohol) matrix reinforced by an electrospun polyurethane nanomesh, yielding an interfacial area adhesion energy of 2060.8 μJ cm–2, and a low skin contact impedance of 21.0 kΩ at 100 Hz. Unlike conventional hydrogel or dry electrodes, our design needs no external adhesive layer, resists dehydration, and withstands everyday mechanical stress while remaining comfortable to wear. It exhibits an air permeance of 0.94 cm3 cm–2 s–1 cmHg–1, a water-vapor transmission rate of 1856.5 ± 36.9 g m–2 day–1, and survives 1000 cycles of 100% uniaxial strain. The electrode also retains >81.4 ± 1.7% of its initial water content after 7 days of storage and maintains its stretchability, adhesion, skin contact impedance, and conductivity even after 60 days. These properties enable reliable, minimized motion artifact acquisition of biosignals during vigorous activities and extended daily use. Finally, we demonstrate wireless surface electromyogram that tracks muscle-recruitment dynamics during strength-training and rehabilitation exercises, including push-ups and climbing, underscoring the potential of the tattoo electrode for real-world wearable health monitoring.
研究领域:
生物医学工程
·
可穿戴电子器件
·
柔性电子器件
·
生物传感器
·
材料科学
·
生物力学
·
健康监测
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PubMed
高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-16
·
IF 23.655
Yang Jie,Chan Kit-Ying,Venkatesan Harun,Kim Eunyoung,Adegun Miracle Hope,Lee Jeng-Hun,Shen Xi,Kim Jang‐Kyo
Highly porous aerogel with longitudinally aligned channels and whisker-like ligaments is constructed by solvent-assisted unidirectional freezing.
The thermal insulation and solar reflection capabilities of the composite aerogel reach a state-of-the-art level.
The composite aerogel capable of infrared stealth and temperature preservation presents great potential for application in energy-saving buildings.
研究领域:
材料科学
·
能源工程
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DOI
PubMed
高影响因子
WATER ENVIRONMENT RESEARCH
·
2025
·Vol. 97
·期 7
·e70121
·
IF 1.9
Zhi-Ke Wang,BaoFen Sun,Ting-Ting Li
In this study, an adsorbent capable of rapidly adsorbing heavy metal ions was prepared using PVA crosslinked with PF127DA and AA/AM. The swelling behavior of the hydrogel in salt solutions was investigated based on the Flory–Huggins theory model. The results indicated that the theoretical predictions of the hydrogel's volume swelling ratio, derived from the Flory–Rehner swelling theory and the Donnan equilibrium, were in agreement with the experimental swelling data of the hydrogel in water and salt solutions. With the increase in the amount of crosslinking agent PF127DA, the water absorption swelling ratio of the composite material was reduced by half, with the volume swelling ratio decreasing from 3.56 to 2.33. When the concentration of cations in the salt solution increased from 10 −5 mol/L to 10 −1 mol/L, the volume swelling ratio of the hydrogel showed a decreasing trend, which in turn affected the adsorption performance of the pollutant. Therefore, increasing the amount of crosslinking agent can enhance the colloidal strength, provided that its swelling properties are not compromised. Additionally, the presence of high concentrations of salt can affect the adsorption behavior of the hydrogel, and appropriate measures should be taken in practical applications to avoid its impact on adsorption behavior. Graphical The study prepared adsorbent, analyzed PF127DA's effect on hydrogel, and found it affects swelling and has high Pb adsorption capacity for heavy metal removal.
研究领域:
材料科学
·
环境科学
·
高分子化学
·
化学工程
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PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 111
·110349-110355
·
IF 3.289
Bolin Liu,Yangguang You,Haifei Zhang,Hao Wu,Junsu Jin,Hongtao Liu
Zinc oxide (ZnO) nano-powders were prepared by a simple PVA-assisted freeze-drying process. Porous materials were firstly prepared by freeze-drying of polyvinyl alcohol (PVA) and zinc nitrate aqueous solutions with different mass ratios, and then calcined to produce ZnO nano-powders directly. PVA was applied as a polymeric carrier and its interaction with zinc nitrate was investigated for its effects on the morphology of the obtained ZnO nano-powders. The PVA/Zn(NO3)2 foams were analyzed by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA), and scanning electron microscopy (SEM). The obtained ZnO nano-powders were also characterized using various techniques and were evaluated as photocatalysts for dye degradation.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2014
·
IF 0.74
Yao Dou,Buning Zhang,Ming He,Guoqiang Yin,Yingde Cui
Feathers, as a by-product of the poultry industry, have long been treated as solid waste disposal which causes a series of environmental and economic problems. Feather keratin (FK) can be extracted from feathers and have very strong stretching resistance. A series blend films based on FK and poly (vinyl alcohol) (PVA) was prepared by solution casting, and dialdehyde starch (DAS) were introduced to achieve better physicochemical properties for the blend films. According to DSC analysis, the single glass transition temperature and single melting temperature of the blend films indicated the good compatibility among FK, PVA and DAS. With increasing PVA content, the tensile strength (σb), elongation at break (ϵb), and decomposition temperature increased, indicated that hydrogen bonds were formed between FK and PVA. With certain PVA content, the increase of DAS caused σb to increase and ϵb, decomposition rates, solubility and water vapor permeability (WVP) to decrease, suggesting the formation of crosslink network among FK, PVA and DAS, that is to say, the mechanical properties, thermal stability and water-resistance of FK/PVA blend film were improved by crosslinking with DAS. The blend film was uniform and translucent, and could be used in packing and bio-medical industries.
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Kang Wen,Yi Li,Shuxing Zhang,Xiaoting Zhang,Runping Han
Chitosan-polyvinyl alcohol-iron (CS-PVA-Fe) composite films with acid resistance and large adsorption capacity were prepared by doping trivalent iron, chitosan, and polyvinyl alcohol. The adsorption mechanism of Congo red (CR) on the composite films was investigated by changing the adsorption conditions (temperature, pH, salt) and characterization (isoelectric point, infrared spectroscopy, photoelectric spectroscopy, scanning electron microscopy). The results showed that the adsorption capacity of the composite film was 450 mg g –1 at pH 5.0, and the adsorption of CR by high concentration salt had only a slight negative effect. The adsorption was following Langmuir, pseudo-first-order kinetics and pseudo-second-order kinetics model, which showed that the adsorption process was based on the single-layer heterogeneous adsorption, and there were both physical and chemical adsorption processes. Thermodynamic analysis shows that adsorption was spontaneous, endothermic and entropy increasing process. According to the characterization analysis, the adsorption mechanism of CR was mainly hydrogen bonding, ion exchange, and complexation. Also, the desorption of CR-loaded film can be performed using 75% alcohol at pH 12. The results showed that CS-PVA-Fe composite films are promising as a suitable candidate for the efficient removal of CR from solution.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
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DOI
高影响因子
IEEE SENSORS JOURNAL
·
2026
·
IF 4.5
Shingping Zhou,Pingxin Ge,Yu Zhang,Zhong Wang,Xin Yi,Qing Zheng,Wei Ma,Gebo Pan,Shaohui Zhang
Osteocalcin, a key biomarker of bone metabolism, is of significant clinical value for the diagnosis and management of osteoporosis through dynamic monitoring. The development of highly sensitive detection methods is therefore of great importance. This study developed a highly sensitive electrochemical immunosensor for osteocalcin detection based on a nanocomposite of carboxylated multi-walled carbon nanotubes (MWCNT-COOH), polyvinyl alcohol (PVA), and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS). A uniform and stable nanocomposite film was prepared via a simple and rapid method involving physical blending and vortex dispersion. Osteocalcin (OC) antibodies were covalently immobilized onto the surface of a functionalized screen-printed electrode using an EDC/NHS coupling system. The detection principle relies on the specific antigen-antibody binding event hindering interfacial electron transfer, enabling the quantitative detection of OC via differential pulse voltammetry (DPV). Under optimal conditions, the sensor exhibited an excellent linear response (R² = 0.996) over a concentration range from 10 pg/mL to 100 μg/mL, with a detection limit of 1.2 pg/mL. Furthermore, the sensor demonstrated outstanding selectivity, reproducibility, and stability, showcasing its potential as a promising tool for the quantitative analysis of bone metabolism biomarkers in biological fluids.
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高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Xueyan Wang,Xiaosong Du,Jupeng Guo,Guo Li,Peiyu Jia,Yin Long,Zhiyi Zhang,Huiling Tai,Yadong Jiang
Traditional conductive hydrogels suffer from intrinsic mechanical brittleness (typically <1 MPa) and insufficient fatigue resistance, making them prone to structural failure during dynamic wearable applications and long-term use, which inevitably leads to signal drift. Herein, poly(vinyl alcohol) (PVA) was used as the matrix; sodium carboxymethyl cellulose (CMC) constructed a flexible double-network framework; tannic acid (TA) enabled energy dissipation via dynamic hydrogen bonding; and sodium sulfate (Na2SO4) triggered Hofmeister effect-driven crystallization, thereby yielding an ultratough and fatigue-resistant conductive hydrogel. Benefiting from the hierarchical structure, the hydrogel achieved integrated mechanical-electrical performance. After the optimized 16 h Na2SO4 treatment, it exhibited an ultralow density of 0.962 g/cm3, a tensile strength of 10.05 MPa (40 × conventional PVA), a toughness of 18.92 MJ/m3, and an ionic conductivity of 3.97 S/m (34.5 × conventional PVA). The fabricated sensor showed excellent fatigue-resistant sensing performance, maintaining >91% signal retention after 5000 stretching cycles at 100% strain, with a rapid response time of 167 ± 9 ms, enabling high-fidelity monitoring of joint motions and physiological pulses. When integrated with machine learning, the system enabled Morse-code communication and achieved a gesture-recognition accuracy exceeding 93%. This study provides a simple and feasible strategy for constructing ultratough, fatigue-resistant conductive hydrogels for next-generation durable bioelectronic devices.
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Yi Yang,Yingfeng Wang,Kaizhun Li,Wei Li,Xun Zhang,Maoli Yin,Xiaojuan Li,Zhipeng Ma,Hao Hou
CuS@6/PVA exhibited good photothermal conversion effect within 15 s. • CuS@6/PVA showed excellent photothermal and photodynamic antibacterial properties within 10 min. • Al@CuS/PVA series displayed satisfactory hemocompatibility. Wound infections remains a persistent clinical challenge, and antibacterial functionalization of wound dressings represented a promising and effective approach to addressing this issue. In this study, a series of aluminum-doped copper sulfide/polyvinyl alcohol (Al@CuS/PVA) nanofiber membranes were fabricated via electrospinning combined with an in situ synthesis method. Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR) and ultraviolet-visible (UV–Vis) spectroscopy were adopted to conduct systematic characterization of the membranes’ structural and morphological properties. The results indicated that aluminum doping significantly enhanced both the photothermal conversion efficiency under near-infrared (NIR) irradiation and the photodynamic activity under simulated sunlight exposure. For CuS@6/PVA, the temperature rapidly increased to above 160 °C within 15 s under 1 W/cm² NIR irradiation, along with efficient reactive oxygen species (ROS) generation. In photothermal and photodynamic antibacterial testing, CuS@6/PVA demonstrated impressive bacterial eradication efficiency. Both Escherichia coli and S. aureus were completely inactivated within 10 min under NIR or simulated sunlight irradiation. Hemocompatibility assessment demonstrated low hemolysis rates (<5%), indicating favorable blood compatibility. These findings demonstrate that Al@CuS/PVA nanofiber membranes possess considerable potential as a dual-mode antibacterial platform for advanced wound dressings and other biomedical applications. Download: Download high-res image (221KB) Download: Download full-size image
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·
IF 7.5
Congli Chen,Huanxin Huang,Xuanwei Chang,Xiufang Wen,Pihui Pi,Shouping Xu
Combining solar-driven interfacial evaporation (SDIE) with hydrovoltaic electricity generation offers a promising route for concurrent fresh water and electricity production. However, existing systems often face challenges in achieving high evaporation rates, substantial power output, and mechanical durability concurrently. To address issues such as high evaporation enthalpy, low surface charge density in pores, and insufficient structural stability in evaporators, this study presents a lignin-based PSC porous sponge evaporator fabricated through facile foaming and aldehyde cross-linking. The incorporation of lignin imparts a hierarchical porous structure and functional properties, enabling efficient water-electricity cogeneration. The evaporator employs a polyvinyl alcohol (PVA) acetal network as the main framework, constructing continuous hydrophilic pathways. Additionally, sodium lignosulfonate (SLS) and sodium carboxymethyl cellulose (CMC) are introduced to form a high surface charge density network (Zeta potential reaching −41.2 mV) within the pores, promoting ion transport to enhance power output. Moreover, the hydrogen-bonding structure of water molecules is modulated by abundant hydrophilic functional groups within the system, which effectively lowers the evaporation enthalpy (~774 kJ kg⁻¹) and thus enhances both evaporation and power generation performance. As shown by experimental results, under 1 sun illumination, the PSC sponge evaporator attains an evaporation rate of 4.38 kg m⁻² h⁻¹. When tested in 3.5 wt% saline water, it still sustains an evaporation rate of 4.05 kg m⁻² h⁻¹ and concurrently produces a voltage output of 0.397 V. Further modular device integration verifies the feasibility of continuous freshwater collection and electricity storage capable of powering an LED. The study puts forward a novel material design strategy for constructing low-cost, environmentally friendly, and sustainable interfacial evaporators for water-electricity cogeneration.
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DOI
高影响因子
Journal of Physical Chemistry Letters
·
2026
·Vol. 17
·期 35
·10155-10164
·
IF 4.5
Gan Jianghao,Mi Yuran,Qiao Hui,Huang Zongyu,Tang Pinghua,Qi Xiang
Conventional ethylene glycol–borax cross-linked
PVA-MoS 2 hydrogel photodetectors only rely on isolated
MoS 2 electronic conduction pathways, which trigger severe
nonradiative
recombination of photogenerated electron–hole pairs and poor
mechanical stretch resistance simultaneously. The lack of mobile ionic
channels and unstable MoS 2 conductive networks severely
limit both photoelectric conversion efficiency and long-term working
stability under dynamic deformation. To break through these dual bottlenecks,
herein we develop an ion-coordination strategy to construct a synergistic
electron–cation dual transport system, where Li + forms reversible coordination bonds with oxygen-containing groups
on the hydrogel matrix to simultaneously build two interconnected
charge transport pathways. The cation migration channels offer free-moving
Li + to neutralize photogenerated holes and weaken Coulomb
confinement for suppressed carrier recombination, while the coordination
anchors MoS 2 nanosheets firmly on polymer skeletons to
maintain intact electronic percolation networks under stretching.
We identify 4 mg mL –1 as the critical threshold
concentration to form continuous long-range cation transport channels
within the hydrogel network. Benefiting from the dual-channel synergistic
effect, the optimized ion-modified hydrogel delivers a 364% elevated
photocurrent density of 4.523 μA cm –2 at 0.6
V bias with 120 mW cm –2 illumination compared with
unmodified pristine PVA-MoS 2 . Moreover, the dual-channel
hydrogel maintains fully reversible and steady photoresponse under
200% tensile strain over 5000 s continuous illumination cycles. This
facile coordination-mediated dual-channel engineering provides a universal
strategy to synchronously optimize photoresponse and deformation tolerance,
shedding new light on high-performance, long-lifetime stretchable
wearable photodetectors.
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高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Yue Wang,Guineng Li,Yeying Li,Mutiao Yao,Qiaobo Wang,Liang Peng,Hua Gu
Hydrogels with excellent mechanical properties and high drug-delivery capacity are highly advantageous for wound healing applications. However, reconciling mechani-cal properties with drug-delivery performance remains challenging. Herein, a semi-interpenetrating polymer network (semi-IPN) hydrogel composed of poly(vinyl alcohol) (PVA) and sodium alginate (SA) was fabricated via freeze-thaw cycling. Through component optimization, this hydrogel achieved a unique combination of de-sirable properties, including softness (Young’s modulus of 32.5 kPa), high stretchability (fracture strain of 283.9%), and high water-content (96.46%). Linagliptin (LIN), a DPP-4 inhibitor crucial for diabetic wound repair, was loaded into the system with an effective loading efficiency of 89.25%. The hydrogel system demonstrated tempera-ture-responsive release kinetics: minimal release occurred at low temperatures, while rapid, sustained release at physiological temperature was achieved, reaching a cumu-lative release efficiency of up to 85.17%, which was highly beneficial for the storage and application of drug-loaded hydrogels. This study presents a hydrogel platform with effectively integrates material robustness, temperature-triggered drug delivery and high-efficiency loading and releasing LIN, which showcases significant potential as a novel therapeutic material for diabetic wound healing.
研究领域:
生物材料
·
药物递送
·
组织工程
·
高分子科学
·
伤口愈合
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）