JOURNAL OF APPLIED POLYMER SCIENCE
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2026
·
IF 3.1
Chunjin Ai,Weigang Zhang,Yucheng Pan
Self-powered flexible piezoelectric devices based on polyvinylidene fluoride (PVDF) face a critical trade-off between piezoelectric output and mechanical flexibility. In this study, an amine-terminated liquid butadiene rubber (ATPB) toughened PVDF/BaTiO 3 (BTO) flexible nanofiber membrane is fabricated via electrospinning to achieve an optimized balance between piezoelectric output and mechanical durability. The ATPB coating serves as a low-modulus elastomeric interphase on BTO nanoparticles, mitigating the modulus mismatch and suppressing interfacial stress concentration while maintaining high ductility, with elongation at break exceeding 33%. Through the combined effects of chemical hydrogen bonding from ATPB and heterogeneous nucleation of BTO, the relative content of polar β-phase reaches 62.4% (Lambert–Beer law) and 60.1% (multi-peak intensity ratio method), with a β-phase absolute crystallinity of 33.38%. The assembled piezoelectric nanogenerator (PENG) produces a stable open-circuit voltage of 10–15 V, representing an approximately 2–3 fold enhancement over pure PVDF devices. The short-circuit current reaches 7 μA, with a peak power density of ~4 μW cm −2 , and the device retains ~92.3% output after 5000 cycles. This research provides an effective strategy for developing flexible PVDF-based materials for energy harvesting and wearable sensors.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2026
·
IF 8.2
Junjie Zhang,Jiayuan Xu,Jijun Ding,Haixia Chen
High-efficiency oil-water separation membranes based on low-mesh copper mesh offer advantages in cost-effectiveness, scalability, and adaptability to complex separation scenarios. However, their inherently large pore size usually results in insufficient separation precision. In this work, the Cu/PVDF/CeO 2 composite membrane is fabricated on the copper mesh substrate by combining the non-solvent induced phase separation method with spraying and immersion techniques. By adjusting the porogen content, the pore size of the composite membrane is effectively regulated, leading to enhanced separation efficiency. This strategy aims to simultaneously achieve superhydrophobicity and high-precision oil-water separation on low-mesh-number copper mesh substrates. The Cu/PVDF/CeO 2 composite membrane achieves a maximum water contact angle of 158.7°, exhibiting superhydrophobicity. In oil-water separation tests, the membrane demonstrates a separation efficiency exceeding 98.5% for all tested oil-water mixtures. Optimal performance is observed in the separation of the immiscible mixture of dichloromethane and water, where the membrane achieves a separation efficiency of 99.83% alongside a high separation flux of 79138.4 L m −2 ·h −1 . Additionally, the composite membrane exhibits excellent long-term stability and cycling stability. This study provides a feasible method for the preparation of high-efficiency oil-water separation composite membranes based on copper mesh substrates, with potential applications in industrial wastewater treatment and environmental remediation.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124128
·
IF 7.5
Lin-Lin Liu,Xue-Ling Zeng,Xuan Shi,Yu-Zhuo Fan,Wen-Yan Zeng,Ze-Hui Bai,Rong-Ke You,Xue-Qin Zhan,Fang-Chang Tsai,Ning Ma
Developing a multifunctional composite membrane with efficient oil-water separation, antifouling, stability, bacterial filtration, and antibacterial functions is essential for treating oily and organic medical wastewater. In this study, a PVDF/TA/APTES/CMCS/Cu-BTC@TiO 2 membrane was fabricated using mussel-inspired surface chemistry and dip-coating. Hydrophilic tannic acid (TA) and carboxymethyl chitosan (CMCS) enhanced membrane hydrophilicity, while hydrolyzed γ-aminopropyl triethoxysilane (APTES) formed a thin SiO 2 network layer that improved the stability of the deposited coating. Photocatalytic TiO 2 and biocompatible Cu-BTC contributed to the membrane’s photothermal response, antibacterial activity, and bacterial filtration. The membrane exhibited superhydrophilicity (water contact angle 10.3°), underwater oleophobicity (oil contact angle 153.9°), high water flux (5963.33 L·m −2 ·h −1 ), and 98.85% separation efficiency. It also achieved 99.99% bacterial filtration efficiency, 99.9% photothermal antibacterial rate, 99.99% photocatalytic sterilization, and self-cleaning ability. This multifunctional membrane shows great promise for oil-water separation and medical wastewater treatment.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 18
·1424
·
IF 3.2
Li Yafang,Sun Yinong,Yan Mengchen,Ma Beining,Li Zhihao,Tian Tao,Li Zongjie,Yan Jing,Zhao Yixia
Textiles, owing to their excellent breathability, softness, and structural elasticity, hold great potential for applications in flexible sensors and intelligent wearable devices. Piezoelectric sensors have become a research hotspot in wearable technology due to their capability for long-term sensing and monitoring. In this work, coaxial electrospinning with dual nozzles (inner and outer) operating simultaneously was employed to fabricate nanofibers, where the synergistic effects of graphene oxide (GO) and barium titanate (BTO) doping were utilized to enhance the piezoelectric performance of polyvinylidene fluoride (PVDF). GO, known for its high electrical conductivity, contributed to improved sensitivity of the composite nanofiber membrane after incorporation. When the mass fraction of GO was 0.1 wt% and that of BTO was 5 wt%, the β -phase content in PVDF reached its maximum value of 84.72%. Under an applied force of 2.2 N, the output voltage of the PVDF/GO/BTO composite nanofiber membrane reached 14.35 V, demonstrating a further enhancement in piezoelectric performance compared with single-component conductive fillers. Moreover, under a test load range of 0–3 N, the piezoelectric film exhibited a high sensitivity of 4.122 V·N⁻ 1 , and durability testing over 500 cycles confirmed its excellent mechanical robustness. Finally, a flexible piezoelectric sensor was fabricated and applied to human motion monitoring, confirming its outstanding potential for wearable sensing applications.
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ACS Omega
·
2026
·
IF 5.2
Ruifeng Wang,Huangxin Cheng,Jiangnan Li,Gengzhe Shen,Yu Li,Jingmei Lyu,Zhengjian Chen
Gel polymer electrolytes typically suffer from low ionic conductivity, limited oxidative stability, and thermal runaway. Nitrate additives can be beneficial, but they are limited by poor solubility. Herein, sandwich-structured ionic liquid gel electrolyte membranes were fabricated by incorporating a polyethylene (PE) interlayer between two poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF–HFP) layers loaded with LiTFSI and 1-ethyl-3-methylimidazolium nitrate ([EMIm]NO2). The PFENE3 membrane prepared with 22.9 wt % [EMIm]NO2 shows optimal overall performance. Specifically, the PE scaffold provides robust mechanical strength (36.7 MPa). The incorporation of [EMIm]NO2 induces multiple synergistic effects: (i) increasing ionic conductivity to 5.03 × 10–4 S cm–1 at 25 °C by suppressing PVDF–HFP crystallinity; (ii) achieving a high Li+ ion transference number (0.449) by confining other charge carriers within the TFSI-[EMIm]+-NO2 hydrogen-bonding network; and (iii) the sacrificial decomposition of NO2 to form robust protective interphases on both the anode and cathode. Consequently, Li/PFENE3/Li symmetric cells demonstrated stable cycling for over 600 h at 0.3 mA cm–2. Furthermore, the Li/PFENE3/NCM622 full cell delivered an initial capacity of 170.9 mAh g–1 at 0.1 C and 159.3 mAh g–1 at 0.5 C, with 78% retention after 100 cycles, significantly outperforming [EMIm]NO2-free systems. These findings provide a viable strategy for developing high-performance and safe Li-metal batteries.
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Shangpeng Fan,Canping Li,Xingyu Zhu,Ran Chen,Enling Zhu,Zeyan Jiang,Ni Ma,Peng Liu,Xiang Shen
Environmental pollution resulting from oil–water emulsions presents a serious threat to both human activities and ecosystems. Although the superwetting membranes are widely regarded as a promising solution for separating oil-in-water emulsions, membrane fouling remains a critical challenge that hinders their long-term practical application. In this study, a hydrophilic copolymer, PHEAA-co-PVP, was synthesized via the copolymerization of hydroxyethyl acrylamide (HEAA) and vinylpyrrolidone (VP). Hydrogen-bonding-induced layer-by-layer (LbL) self-assembly of dopamine (DA) and PHEAA-co-PVP was subsequently used as a biomimetic strategy to functionalize polyvinylidene fluoride (PVDF) membranes. The results revealed that the incremental coating degree enhanced the pore-blocking effect, leading to a gradual reduction in the mean aperture size of the membranes. The introduced coating markedly enhances the surface hydrophilicity of the membrane, as evidenced by an initial water contact angle as low as 14.9°, while simultaneously conferring underwater superoleophobicity to the separation membrane. The flux of the modified membranes was found to initially increase and subsequently decrease with increasing coating degree, as shown by permeation experiments. Furthermore, the membranes showed exceptional separation capability for a range of oil-in-water emulsions, achieving over 98% oil rejection. Thanks to the robust hydration capability of the self-assembled coating, the membranes exhibited superior antifouling performance during cyclic filtration of oily emulsions, attaining a high flux recovery ratio of up to 96%. This study demonstrates a strategy for fabricating superwetting membranes through LbL self-assembly, enabling highly efficient oil–water emulsion separation.
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ChemSusChem
·
2024
·Vol. 18
·期 7
·e202401755
·
IF 7.5
Qiyue Chen,Haitao Lv,Jun Peng,Qi Zhou,Wenzhuo Wu,Jing Wang,Lili Liu,Lijun Fu,Yuhui Chen,Yuping Wu
Solid-state batteries (SSBs) present a potential pathway for advancing next-generation lithium batteries, characterized by exceptional energy density and enhanced safety performance. Solid-state electrolytes have been extensively researched, yet an affordable option with outstanding electrochemical performance is still lacking. In this work, Li 4-x Na x Ti 5 O 12 (LNTO)-based composite solid electrolytes (CSEs) were developed to enhance the interface stability and electronic insulation. The CSE is composed of Li 3.88 Na 0.12 Ti 5 O 12 (LNTO3) and poly (vinylidene fluoride) (PVDF) with a proportion of 20 wt % exhibited high ionic conductivity (4.49×10 −4 S cm −1 at a temperature value equal to 35 °C), high ionic transfer number (equal to 0.72), low activation energy (equal to 0.192 eV), and favorable compatibility with the Li metal anode. The Li|LNTO3|LiFePO 4 cell, tested at a 0.5 C current density, demonstrated 154.5 mAh g −1 of outstanding cycling stability for 200 cycles, capacity retention of 97.6 % along with a Coulombic efficiency of over 99 %, as well as a significant average specific capacity of 127.8 mAh g −1 over 400 cycles at 5 C. The Li|LNTO3|LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cell could also operate over 100 cycles at 1 C. This study offers an effective method for preparing commercial CSEs for SSBs. Graphical A low-cost and stable solid-state electrolyte based on Sodium-doped Li 4-x Na x Ti 5 O 12 is prepared by the typical casting method. Due to its excellent interfacial stability with lithium metal anode, the lithium metal battery of Li||LFP at 0.5 current density shows excellent cycling stability (154.5 mAh g −1 for 200 cycles, 97.6 % capacity retention and over 99 %Coulombic efficiency).
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Yao Xiao,Dan Ni Luo,Qing Lin Guan,Yu Xian Chi,Ting Zhang,Feng Ying Bai,Yong Heng Xing
Viologen-encapsulated metal–organic frameworks (MOFs) have attracted significant interest owing to their responsiveness to multiple external stimuli, which enhances their potential applications in sensing and environmental monitoring. Here, we synthesized the novel viologen-encapsulated Ho-MOF material (pbpy)·[Ho2(NH2–BDC)4(H2O)]·3H2O (complex 1) via an in situ method using 2-aminoterephthalic acid (NH2–H2BDC) and the viologen derivative dichloro-1,1′-(1,4-benzylidene)-di(4,4′-bipyridine) (pbpy·2Cl), along with the control material [Ho4(NH2–BDC)5(DMA)2(μ3-OH)2]·3H2O (complex 2) without a viologen for comparison. Complex 1 exhibited dual detection capability for Th(IV) and nitroaromatic compounds (NACs), demonstrating significant advantages in sensing performance compared to complex 2. These results highlight the critical role of viologen incorporation in improving sensor functionality. Moreover, we prepared a MOF-based PVDF composite film material capable of rapidly detecting Th(IV) and NACs, demonstrating potential for practical sensing applications. In addition, thanks to the presence of a viologen inside the channels, complex 1 could achieve rapid and visual detection of N2H4·H2O. EPR results indicate that the color change is due to the generation of viologen radicals. These properties make the material a promising candidate for multianalyte detection, advancing the development of multistimulus responsive materials.
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Mengya Cui,Jing Wang,Yue Yang,Guochen Dong,Yuxin Huang,Rongshi Xiao,Ting Huang
Polymer-based solid electrolytes are promising candidates for high-rate all-solid-state lithium batteries (ASSLBs), yet their ionic conductivity is fundamentally limited by the coupled effects of high crystallinity and the dominance of the nonpolar α-phase. In this study, we propose a femtosecond laser-enabled microstructure regulation strategy that synchronously enhances amorphous-phase formation and polar β-phase enrichment in polyvinylidene fluoride (PVDF)-based composite electrolytes (CPEs). Two-temperature modeling reveals that femtosecond pulses generate ultrafast, spatially confined thermal transients that lead to picosecond-scale melting followed by rapid cooling with local cooling rates approaching ∼107 K s–1. Such extreme nonequilibrium cooling is essential for freezing the amorphous phase and stabilizing the metastable β-phase formed during the transient thermal cycle. In addition, the intrinsic spatial energy distribution of the femtosecond laser produces radially and depth-dependent thermal gradients, which drive spatially selective phase reconstruction. The central high-temperature region undergoes partial melting and amorphization, whereas the surrounding intermediate-temperature zones preferentially stabilize the β-phase. Guided by these insights, we identify an optimal effective pulse count of 3.75, yielding a 3-fold increase in ionic conductivity (7.4 × 10–4 S cm–1) relative to pristine films. Solid-state cells employing the laser-processed electrolytes exhibit improved cycling stability, achieving ∼11% higher capacity retention after 200 cycles. This work establishes femtosecond laser-induced spatial phase regulation as a powerful, solvent-free route to synergistically modulate amorphous and polar crystalline phases in PVDF, offering a promising route toward high-performance solid-state energy storage technologies.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yi Zhang,Yiyuan Peng,Xiangming Li,Hao Lu,Zequn Ma
Developing flexible, metal-free membranes for efficient piezo-photocatalytic environmental remediation remains a critical challenge. Herein, an all-organic, hierarchical porous COF/PVDF-HFP composite film was fabricated via a phase inversion method. Driven by strong interfacial hydrogen bonding, the COF nanoparticles (with an optimal loading of 5 wt%) served as efficient nucleating agents, significantly enhancing the electroactive β-phase content of the PVDF-HFP matrix and boosting its piezoelectric response. Under simultaneous light and ultrasonic excitation, the optimized composite achieved a remarkable Rhodamine B degradation efficiency of 97.73% within 180 min, exhibiting a kinetic rate 2.3 times higher than that of pristine PVDF-HFP. Furthermore, it demonstrated robust broad-spectrum antibacterial efficacy (>99% sterilization) against both E. coli and S. aureus . Crucially, by integrating density functional theory (DFT) calculations with absolute band alignments (UPS) and dynamic in-situ XPS tracing, we definitively unveiled an internal electric field-driven S-scheme heterojunction mechanism. This S-scheme pathway dynamically steers charge recombination, successfully retaining highly reductive photogenerated electrons on the COF to thermodynamically favor the dominant generation of superoxide radicals (·O 2 − ) and a remarkable yield of H 2 O 2 (937.6 µM). Exhibiting exceptional structural stability over multiple cycles, this entirely metal-free composite offers a robust, sustainable paradigm for engineering high-performance piezo-photocatalytic interfaces for water purification and hygiene protection.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zhanzhi Wang,Tuanle Li,Mingxia Wang,Yizhen Wang,Le Guo,Xuemin Li,Linfang Dong,Zhenyu Cui,Feng Yan
Oily wastewater poses a significant challenge in oilfield production, where conventional separation membranes often exhibit limited demulsification efficiency, poor antifouling performance, and inadequate separation stability. Inspired by the molecular structure of commercial poly(propylene oxide)-poly(ethylene oxide) (PPO-PEO) demulsifiers, this study introduces PPO-PEO block polyethers with varying hydrophilic-lipophilic balance (HLB) values into a polyvinylidene fluoride (PVDF) matrix to develop a high-performance ultrafiltration membrane. Graft copolymers of PPO-PEO and styrene-maleic anhydride (SMA) were synthesized and blended with PVDF to fabricate functionalized membranes via non-solvent induced phase separation (NIPS). Results indicate that increasing the HLB value of the incorporated polyether significantly enhances membrane porosity, surface hydrophilicity, underwater oleophobicity, and antifouling capability. The F68-modified membrane (M-F68) exhibited the most promising performance, with an underwater crude oil contact angle of 162.0 ± 2.9° and a pure water flux of 213.6 ± 4.8 L·m −2 ·h −1 , which is approximately 25 times that of the pristine PVDF membrane. The flux recovery rate (FRR) reached 90.9% after three cycles of BSA filtration, far exceeding the 14.0% of the unmodified membrane. Moreover, the M-F68 membrane achieved over 99.0% separation efficiency for various surfactant-stabilized oil-in-water emulsions. This work provides a facile and effective strategy for designing demulsifying ultrafiltration membranes with robust antifouling properties, demonstrating great potential for treating oily wastewater.
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高影响因子
Nanoscale Horizons
·
2026
·
IF 6.4
Jinjin Song,Haifan Tang,Junyun Zhang,Jiaxue Yu,Dailin Yuan,Yanqiu Zhang,Jinyang Wang,Di Pan,Weixu Tian,Jingye Jin,Jian Fang,Chenhong Lang
Respiratory acoustic signals provide a crucial insight for assessing respiratory system health and diagnosing related diseases. Flexible acoustic sensors hold promise for continuous, wearable monitoring but often face trade-offs between performance, comfort, and integration into daily textiles. Herein, we present an acoustic sensing fabric (ASF) woven from silver-plated nylon warps and PVDF-HFP nanofibrous core–shell wefts, which form piezoelectric/triboelectric units at yarn interlacing points to efficiently convert micro-amplitude vibrations into electrical signals. The optimized ASF exhibits a high output of up to 38.3 V at 170 Hz/118 dB, and shows notable sensitivity, reaching 15 mV Pa−1 at 1000 Hz/94 dB and even reaching 2.5 × 103 mV Pa−1 at 170 Hz/90–95 dB. Through systematic investigation of structural parameters, supported by laser Doppler vibrometry and finite element simulation, we elucidate how the fabric structure influences forced vibration and signal output. The ASF accurately records the directly produced respiratory sounds, the playback of pathological cardiopulmonary acoustics, and daily speech, demonstrating its capability for respiratory disease diagnosis. Moreover, it can be seamlessly integrated into common textiles using standard weaving processes. This work thus provides a practical, scalable platform for designing everyday wearable systems for applications such as respiratory monitoring, remote cardiopulmonary auscultation, and voice-assisted human–machine interfaces.
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高影响因子
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