Journal of Materials Chemistry C
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2025
·
IF 5.1
Jingyu Du,Daohai Zhang,Yuhuan Xu,Xiao Zhan,Shuhao Qin
With the increasing global energy demand, water-based zinc ion batteries have received widespread attention. However, the growth of zinc dendrites and the occurrence of side reactions on the surface of zinc electrodes can affect the capacity of zinc ion batteries, hindering their practical application. This study reports a multifunctional dendrite-free gel electrolyte prepared by introducing carboxyl modified nanocellulose (C-CNFs) into a polyvinyl alcohol (PVA) based gel electrolyte. At the same time, we also add the antifreeze agent dimethyl sulfoxide (DMSO) to it, which greatly improves the low-temperature performance of gel electrolytes. The rich functional groups on the surface of C-CNFs can effectively adjust the continuous movement of PVA and improve the mechanical strength of the gel electrolyte, and at the same time, they can effectively absorb zinc ions, enable uniform distribution of zinc ions in the electrolyte, reduce the interface concentration gradient, and reduce the occurrence of side reactions, so that the zinc ion deposition is more uniform, and dendrite free deposition is achieved. The polyaniline zinc ion battery assembled with this electrolyte can stably cycle over 3000 times at room temperature, with a capacity retention rate of 83.23%. At −20 °C, the capacity retention rate reaches 60% after 1200 cycles.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yifei Gong,Haiyang Shen,Hua Zhao,Yueyue Zhang,Ping Li,Congliang Cheng
Quaternized polyepichlorohydrin (PyPECH) was successfully synthesized by the quaternization reaction between Pyridine and PECH. The correctness of the experimental result was demonstrated through Fourier transform infrared spectroscopy (FTIR) and 1 H NMR spectroscopy. With the combination of PyPECH, Polyvinyl alcohol (PVA), Ethylene-vinyl alcohol copolymer (EVOH), and Tetraethyl orthosilicate (TEOS), five different anion exchange membranes (AEMs) for diffusion dialysis (DD) were successfully prepared. The structure of prepared membranes was characterized and analyzed in detail, which included FTIR, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscope (TEM). At the same time, the comprehensive performances which included wate uptake (W R ), linear expansion rate (LER), ion exchange capacities (IEC), thermal stability, chemical stability, and mechanical stability were also discussed at great length. In DD experiments, the prepared membranes demonstrated excellent acid recovery ability, with the acid dialysis coefficients (U H + ) of 11×10 −3 to 35.5×10 −3 m/h. Furthermore, according to the test results, the prepared membranes exhibited a higher S value (35−50) than that of commercial membranes DF-120 (18.5). Therefore, the prepared membranes had competitive advantage in acid recovery via diffusion dialysis.
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JOURNAL OF POLYMER RESEARCH
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2025
·Vol. 32
·期 6
·1-11
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IF 2.8
Han Yu,Wei Chaoquan,Wang Ting,Zeng En
The inevitable damage to paint films during coating applications significantly reduces their protective performance, leaving the underlying substrate vulnerable. Developing self-healing coatings is therefore of critical importance. This study presents the synthesis of polyvinyl alcohol (PVA)/polyurea hybrid microcapsules (MCs) loaded with isophorone diisocyanate via interfacial polymerization in an oil-in-water emulsion, with PVA serving as the emulsifier. These microcapsules were incorporated into acrylic resin, along with a dispersant, co-solvent, and isocyanate curing agent, to formulate a microencapsulated self-healing two-component waterborne polyurethane (2 K WPU) coating. The microcapsules were characterized using TG, FTIR, and SEM. The influence of PVA's polymerization degree and alcoholysis degree on microcapsule properties was systematically analyzed. Results indicate that PVA 1799 as an emulsifier yields microcapsules with minimal surface folds and smooth morphology. When 9 wt% of MC 1799 was added to the 2 K WPU coating, the resulting formulation exhibited optimal performance, achieving an average particle size of 29 μm, along with superior self-healing and anti-corrosion properties. This research offers a novel approach for developing high-performance self-healing coatings with potential industrial applications.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Yongkang Guo,Yanchao Ge,Shenao Nie,Yuxuan Qiu,Xin Wang,Yangang He
Polysilicon (Poly-Si) is crucial for gate electrodes and interconnects in integrated circuits. Surface uniformity after Chemical Mechanical Polishing (CMP) critically impacts device performance, especially with stringent photolithography requirements at scaled dimensions. Optimizing slurry formulation enhances uniformity, but the synergy between polymer (e.g., Polyvinyl Alcohol, PVA) and nonionic surfactant (e.g., Fatty Methyl Ester Ethoxylates, FMEE) and its effect on Poly-Si CMP uniformity remain unclear. This study introduced PVA and FMEE into an alkaline slurry. Post-CMP uniformity (Site Front Quotient Range, SFQR; Within-wafer Nonuniformity, WIWNU) and roughness (Local Root Mean Square Roughness, Sq) were evaluated using wafer geometry testing and Atomic Force Microscopy (AFM). Adsorption behavior and polishing effects were investigated via X-ray Photoelectron Spectroscopy (XPS), Attenuated Total Reflection Fourier Transform Infrared spectroscopy (ATR-FTIR), Molecular Dynamics (MD) simulation, and friction testing. Compared to control (Blank), PVA/FMEE slurry significantly improved uniformity: SFQR reduced by 0.05 μm, edge WIWNU decreased to 2.97 %, and Sq optimized to 0.55 nm. PVA and FMEE synergistically form a dense composite adsorption layer via hydrogen bonding, selectively modulating local removal rates through lubrication and interfacial protection. Synergizing with enhanced abrasive dispersion stability, this mechanism improves Poly-Si CMP surface uniformity. The findings provide insights for developing high-precision Poly-Si CMP slurries.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2025
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IF 4.9
Yanan Ding,Yuru Hou,Wenjing Liu,Yijian Liu,Qiang Liu,Youli Yao,Da Chen
Hydrogel-based wearable devices have attracted tremendous interest in health monitoring, the development of more compatible, effective, and stable sensing material is one of the most daunting challenges. In this work, the poly (vinyl alcohol)/sodium alginate/carbon nanotubes (PVA/SA/CNT) composite hydrogel was prepared, with the formation of PVA/SA double crosslinking network and hydrogen bonds between CNT and PVA. The synergistic enhancement effect of SA and CNT on the PVA hydrogel has been investigated systematically, and the hydrogel with PVA:SA ratio of 9:1 and CNT concentration of 5 mg/mL exhibit optimal comprehensive performance, characterized with high stretchability (∼346 %), good elastic recovery, and anti-fatigue stability over 1000 cycles at 30 % strain. The optimal PVA/SA/CNT hydrogel was applied as the strain sensor for human motion demonstrating sensitive response not only to tiny deformations (such as facial muscle contractions and throat swallowing motions), but to large-range joint flexions (such as finger, wrist and knee), with a low detection limit even under a very slight strain of 0.4 %. Besides, compared to the commercial dry electrodes, the hydrogel skin-like electrodes achieved a significantly elevated signal-to-noise ratio (SNR) from 7.5 dB to 18.2 dB for the electrocardiography monitoring. The study provides new insights into structural design strategies for flexible sensing materials and wearable device.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Qianfang Sun,Bingbing Lai,Xiaoyu Wang,Bo Dai,Xuejun Liu,Wenjing Lou
Hydrogels, owing to their outstanding hydrophilicity and remarkable ability to mitigate creep and leakage issues, serve as ideal lubricants. The introduction of nanomaterials such as MXene and graphene oxide (GO) can further enhance the mechanical strength and tribological properties of hydrogels. In this study, MXene/GO-PVA composite hydrogel lubricants were prepared by incorporating the two nanomaterials of MXene and GO into the PVA hydrogel by the chemical cross-linking method, and their tribological properties were systematically investigated. Furthermore, the lubrication mechanism of the MXene/GO-PVA hydrogel was investigated and deduced through multiple analytical techniques. Compared with the base hydrogel and single-component hydrogel, the MXene/GO-PVA hydrogel exhibits the best tribological performance: its coefficient of friction is reduced by 50.68%, and its wear volume is decreased by 63.99% relative to the PVA hydrogel. The inherent low interlayer shear strength and interlayer slip characteristics of MXene and GO, combined with their surface-abundant hydrophilic groups and the synergistic effects generated within the three-dimensional PVA hydrogel network, collectively contribute to the excellent lubrication performance. This study offers insights into the development of high-performance water-based lubricants.
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BIOTECHNOLOGY AND BIOENGINEERING
·
2025
·
IF 3.6
Man Zhao,Mengying Yu,Huiru Yuan,Yiting Shen,Zhiqiang Liu,Yuguo Zheng
Carcinine, a valuable imidazole dipeptide with antioxidant and therapeutic properties, faces biosynthesis challenges due to enzyme aggregation and substrate inhibition. In this study, an integrated strategy combining linker peptide engineering and immobilization was applied to address these challenges and enhance carcinine production. Rational design of linker peptides (D 5 , L 2 , L 3 ) in the sfp-Ebony fusion protein enabled its highest soluble expression in WSL 2 E strain, achieving 93.1% conversion efficiency—3.5-fold higher catalytic efficiency than WSGE strain. Response surface methodology optimized sodium alginate-polyvinyl alcohol (SA-PVA) immobilization parameters (5% PVA, 3% SA, 2.3% CaCl₂), yielding excellent immobilized WSL 2 E@SA-PVA cells with 95.93% activity recovery. Structural characterization by scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD) confirmed the formation of a porous SA-PVA matrix that protected cells from harsh conditions. The immobilized biocatalyst exhibited superior operational stability (retaining > 80% activity after 7 cycles) and storage stability (maintaining 44.89% activity after 14 days at 4°C). Fed-batch scale-up (50 mL) achieved a record carcinine titer of 71.13 mM, mitigating the inhibitory effect of high substrate concentrations through phased substrate feeding. This study provides a scalable biocatalytic platform for industrial carcinine production, effectively addressing key bottlenecks in biocatalyst stability and substrate tolerance.
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PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Lu Tang,Kechen Zhou,Qirui Wu,Sinan Feng,Wenchuan Wang,Ji-an Li,Sirui Tan,Dawen Zeng
Crack-structured flexible strain sensors have attracted considerable interest in the field of flexible electronics due to their notable sensitivity and stretchability. However, crack propagation in these sensors restricts the strain range and compromises compatibility by collapsing the conductive network and degrading the interfacial adhesion. This research proposes a PVA optimization strategy based on the layer-by-layer assembly method, leading to the development of a PVA buffer layer-reinforced TPU @ MXene (MPTPU) fiber strain sensor. The incorporation of the PVA buffer layer improves interfacial adhesion and effectively alleviates stress concentration, thus broadening the effective sensing range of MPTPU. Additionally, hydrogen bonding within MPTPU improves the uniformity and adhesion of the conductive coating, enhancing the interfacial compatibility. The carefully engineered multilayer composite structure significantly boosts the sensor’s performance and stability, exhibiting a sensitivity of 12.8, 50% stretchability, a detection threshold of 0.1%, and durability exceeding 10,000 stretching cycles. Furthermore, MPTPU demonstrates effective bending sensing performance and washability, making it well-suited for integration into textiles. The strain sensor accurately detects a wide range of human motions. With these advantages, such sensors hold great promise for applications in motion detection, health management, and wearable smart devices.
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PubMed
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COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Dan Liu,Jiajun Qiu,Ru Xu,Junyu Liu,Jiayin Feng,Liping Ouyang,Shi Qian,Yuqin Qiao,Xuanyong Liu
Bacterial infections in wounds often delay the healing process which threaten human health and life. The development of biocompatible hydrogels with antibacterial activity and self-healing to achieve excellent wound closure effectiveness is highly desirable in clinical applications. Herein, a new class of highly stretchable, biocompatible, and antibacterial hydrogel dressings called BPP hydrogel is designed and prepared by chemically cross-linking β-CD with PEI and then physically cross-linking with PVA. The BPP hydrogel exhibits superior properties including excellent antibacterial properties against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli , good biocompatibility for mouse fibroblasts , mouse embryonic fibroblasts and human umbilical vein endothelial cells, outstanding deformability and self-healing performance to protect the wound completely even in special scenes such as pulling and bending. Besides, after damage, the broken BPP hydrogel could heal together, and the healed BPP hydrogel could be stretched to 150% breaking deformation. Furthermore, in vivo experiments further verify that BPP hydrogel has excellent sterilization and healing effect on infectious wounds. This work proves that BPP hydrogel would be a promising material for wound healing and has good prospect for clinical translation.
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Materials
·
2017
·Vol. 10
·期 8
·967
·
IF 2.654
Rui Cai,Gang Tao,Huawei He,Pengchao Guo,Meirong Yang,Chaoxiang Ding,Hua Zuo,Lingyan Wang,Ping Zhao,Yejing Wang
To develop silk sericin (SS) as a potential antibacterial biomaterial, a novel composite of polyelectrolyte multilayers (PEMs) coated sericin/poly(vinyl alcohol) (SS/PVA) film modified with silver nanoparticles (AgNPs) has been developed using a layer-by-layer assembly technique and ultraviolet-assisted AgNPs synthesis method. Ag ions were enriched by PEMs via the electrostatic attraction between Ag ions and PEMs, and then reduced to AgNPs in situ with the assistance of ultraviolet irradiation. PEMs facilitated the high-density growth of AgNPs and protected the synthesized AgNPs due to the formation of a 3D matrix, and thus endowed SS/PVA film with highly effective and durable antibacterial activity. Scanning electron microscopy, energy dispersive spectroscopy, X-ray diffractometry, Fourier transfer infrared spectroscopy, water contact angle, mechanical property and thermogravimetric analysis were applied to characterize SS/PVA, PEMs-SS/PVA and AgNPs-PEMs-SS/PVA films, respectively. AgNPs-PEMs-SS/PVA film has exhibited good mechanical performance, hydrophilicity, water absorption capability as well as excellent and durable antibacterial activity againstEscherichia coli,Staphylococcus aureusandPseudomonas aeruginosaand good stability and degradability. This study has developed a simple method to design and prepare AgNPs-PEMs-SS/PVA film for potential antibacterial application.Keywords:sericin;poly(vinyl alcohol);polyelectrolyte multilayers;AgNPs;antibacterial activity
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MATERIALS LETTERS
·
2019
·
IF 3.019
Kaili Song,Weiming Zhu,Xiaoyan Li,Zhicheng Yu
Fabrication of multifunctional hydrogel with excellent mechanical property, self-healing and shape memory ability is still a challenging issue. In this study, a mechanical robust multifunctional hydrogel based on PVA reinforced by cellulose nanocrystal using nanofiller reinforcement strategy was reported. Owing to the hydrogen bonding and supramolecular interaction between PVA and CNC, the prepared hydrogel exhibited satisfying mechanical property. The obtained multifunctional PVA hydrogel could be potentially applied in biomedical or artificial skins fields.
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Journal of Food Measurement and Characterization
·
2022
·Vol. 16
·期 3
·2314-2322
·
IF 3.006
Chen Ying,Cao Jilin,Wei Hengyong,Wu Zhengang,Wei Yingna,Wang Xuepei,Pei Yuan
Silver nanoparticles (Ag NPs) were decorated on the electrospun polyvinyl alcohol (PVA)/polyethyleneimine (PEI) nanofibers by electrostatic adsorption in order to prepare Ag@PVA/PEI SERS substrate. The morphology and chemical structure analysis show that the metal Ag NPs are decorated on the PVA/PEI nanofibers surface uniformly. The lowest distinguishable level of Rhodamine 6G (R6G) is 10 −6 M of Ag@PVA/PEI nanofibers SERS substrate. It exhibits remarkable enhancement effect (EF = 1.4 × 10 5 ), good reproducibility (RSD = 9.5%). By the investigations of Raman spectra analysis, the Ag@PVA/PEI nanofibers substrate presented high sensitivity in the detection of enrofloxacin. Therefore, it facilitates a simple, direct, in-situ method for enrofloxacin residue detection on an irregular prawn surface. Graphical abstract
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