Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tianyi Zhang,Bo Yang,Ming Hao,Xiaodong Hu,Yanbo Liu,Xiaoxiao Wang
Flexible piezoelectric nanogenerators (PENGs) are emerging as sustainable power sources for self-charging wearable electronic devices due to their capability to harvest mechanical energy from the environment. Here, we have developed a high-output flexible PENGs based on electrospun composite nanofibers involving poly(vinylidene fluoride) (PVDF), barium titanate modified by dopamine hydrochloride (PDA@BTO) with an enhanced electroactive phase. On addition of 3 wt % PDA@BTO nanoparticles, the electroactive β-phase of the PVDF is found to be intensified to ∼88.05% as account of the synergistic interfacial interaction between the PDA@BTO nanoparticles and the ferroelectric host polymer substrate on electrospinning. The introduction of carbon black (CB) promotes piezoelectric charge transfer and increases output power. The PBTO/CB/PVDF composite nanofibers delivered the highest V OC of 55 V and the optimal I SC 3.1 μA with 3% PBTO and 1% CB. The fabricated PENG based PBTO/CB/PVDF composite nanofibers successfully charged capacitors with capacities of 0.1 μF, 0.33 μF, and 1 μF to voltages of 1.9 V, 3.2 V, and 10 V within 400 s, respectively. The device has response time of 0.1 s and the d 33 piezoelectric constant of 1.7 pC/N. The piezoelectric devices exhibited minimal variation in voltage and excellent stability over 900 cycles and the prepared piezoelectric device can light up to 20 LEDs. The potential of the piezoelectric composite nanofiber membranes for assembling mechanical energy collectors and piezoelectric sensors was demonstrated.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2024
·
IF 3.2
Wenlong Ma,Tianxu Hao,Xinya Wang,Wei Zhang,Yonggui Li,Mingxing Chen
In this paper, a high-performance composite nanofiber membrane with excellent air filtration and dye degradation properties was prepared by incorporating MIL-53(Fe) nanoparticles into the electrospinning solution. The results showed that the filtration efficiency for PM2.5 of the PP/PVDF-HFP/MIL-53(Fe) composite nanofiber membrane reached up to 99.3% with the addition of 2 wt% MIL-53(Fe). Moreover, the composite nanofiber membrane exhibited steady filtration efficiency across different parameters, including air velocity, PM2.5 concentration, and extended testing time. Furthermore, the incorporation of MIL-53(Fe) significantly enhanced the removal efficiency of the composite nanofiber membrane toward Rh B, resulting in a remarkable 91% removal rate. The polymer/MOF composite nanofiber membranes prepared by simple and cheap electrospinning technology have a wide range of practical applications in the field of environmental protection. Highlights PPM composite nanofiber membrane was prepared via electrospinning method. MIL-53(Fe) nanoparticles were introduced to PPM composite nanofiber membrane. PPM composite nanofiber membrane showed excellent removal efficiency for PM2.5. PPM composite nanofiber showed a good removal performance for RhB in solution.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Vestince Balidi Mbayachi,Lixin Liang,Bao Zhang,Yaru Zhang,Guiming Zhong,Kuizhi Chen,Guangjin Hou
Composite polymer electrolytes (CPEs) are considered as promising electrolytes for next-generation lithium batteries due to their superior advantages in safety, mechanical stability/flexibility, cathode compatibility, etc. However, achieving high Li + conductivity remains a major challenge, particularly at low temperatures. A key obstacle lies in the limited understanding of the complex interplay among amorphous components, including fillers, plasticizers, and residual solvents, which significantly hampers the rational design of high-performing CPEs. In this contribution, a polyvinylidene fluoride (PVDF)-based composite electrolyte has been developed, exhibiting high room-temperature ionic conductivity/mobility (>1 mS cm −1 /0.95 × 10 −11 m 2 s −1 ), along with excellent electrochemical performances, including a wide stability window (4.8 V vs. Li/Li + ), superior charge/discharge capacity, and reversibility. By performing advanced solid-state nuclear magnetic resonance (ssNMR) techniques, in combination with systematic investigations into solid polymer electrolytes (SPEs), gel polymer electrolytes (GPEs), and CPEs, we establish an efficient NMR-based strategy for deconvoluting the structural and dynamic features of complex electrolyte systems. Notably, the simple 1 H magic-angle spinning (MAS) NMR spectroscopy enables the identification and monitoring of nearly all components in the composite matrix. Motion-Sensitive 1 H- 13 C and 1 H- 7 Li correlation experiments further reveal that the rigidity of PVDF polymer chain segments and the presence of residual solvents are two critical factors governing Li + mobility. Moreover, we demonstrate that the order of the filler and plasticizer addition during the CPE fabrication significantly influences the performance of the electrolyte by regulating the retention of residual solvents. This work not only provides molecular-level insights into the structure-ion mobility relationships in the PVDF-based CPEs but also establishes a general NMR-based characterization approach for investigating other complex composite electrolyte materials.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yichao Chen,Ruidong Ming,Jingyi Wang,Zhuohao Bao,Linxin Lu,Zhengliang Du,Yiheng Song,Xianze Yin,Xianjie Wen
Addressing industrial fluorine waste disposal while enhancing fluorinated triboelectric materials constitutes dual critical challenges. By compounding oxygen-free CaF 2 nanoparticles synthesized from solidified fluoride ions with PVDF, this study achieves simultaneous environmental remediation and triboelectric enhancement. The synergistic mechanisms include: (1) Intrinsic negative triboelectric polarity enhancement (work function increased from 4.97 to 5.31 eV); (2) Aggregated state modulation ( β -phase: 76.8 % to 90.8 %; crystallinity: 43.5 % to 48.9 %); (3) Interfacial polarization (>25 % dielectric constant increase at 1 kHz). The 20 wt% CaF 2 /PVDF composite film exhibits 128 V open-circuit voltage, 43 nC transferred charge, and 403.3 mW/m 2 power density - representing 2.79-fold enhancement over pure PVDF. The composite maintains >95 % output stability through 3000 bending cycles and functions effectively as wearable strain sensors for human motion monitoring. This integrated strategy establishes a sustainable paradigm merging waste valorization with high-performance triboelectric material design.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Xingang Liu,Xi Li,Xingneng Wei,Junyu Chen,Yijun Li,Chuhong Zhang
Porous poly(vinylidene fluoride) (PVDF) attracts considerable attention for mechanical energy harvesting and self-powered systems owing to its exceptional electromechanical coupling capabilities. Supercritical carbon dioxide foaming (SCF) that features solvent-free and green nature is one of the most preferable approaches to construct controllably porous polymers. Nonetheless, the electroactive β-phase of PVDF remains elusive during SCF due to its instability under an elevated temperature. Herein, we pioneer the use of ionic liquid (IL)-assisted SCF for the fabrication of self-polarized β-PVDF piezoelectric foam with tailored cells. IL incorporation not only facilitates CO2 infusion but also catalyzes the formation and preservation of β-phase crystals throughout the SCF process, culminating in a PVDF foam with an exceptionally high β-phase content (98%). Furthermore, the constructed honeycomb-like pore can effectively absorb external forces and significantly amplify the compressive strain, substantially enhancing the piezoelectric output of the PVDF foam. Impressively, PVDF foam with circumferential pore delivers a maximum piezoelectric output of 19.1 V, setting a new benchmark for SCF fabricated PVDF-based foam PEH. This advanced piezoelectric PVDF foam demonstrates significant potential as a flexible sensor for real-time monitoring of human foot pressure, highlighting its utility in adaptive sensing applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Ran Yu,Liying Pu,Xiaofang Wang,Peng Liu,Xiang Shen
The eco-friendly nature and energy efficiency of polymeric membranes have established them as pivotal materials for oil-in-water emulsion separation. However, persistent membrane fouling caused by oil deposition remains a major challenge, significantly hindering their practical implementation in industrial settings. In this work, thiol–ene photochemistry was employed to synthesize PEGylated silica nanoparticles (SiO2-g-PEGDA) using poly(ethylene glycol) diacrylate (PEGDA) and hexanedithiol (HD) as monomers. Biomimetic PVDF membranes were engineered via vapor-induced phase separation (VIPS) by integrating SiO2-g-PEGDA nanoparticles, followed by secondary coagulation in a dopamine (DA) solution. The experimental results demonstrate that the biomimetic membranes exhibit a characteristic sponge-like cross-sectional morphology and well-defined rough surface microstructures, which are attributed to the synergistic roles of SiO2-g-PEGDA as nanofillers and DA as interfacial cross-linker during secondary phase separation. Energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) analyses confirm that the combined action of nanoparticles and PDA significantly increases the density of hydrophilic functional groups on membrane surfaces and within pore channels. The membranes exhibit excellent hydrophilicity and underwater superoleophobicity, achieving an outstanding emulsion flux of 3537 Lm–2 h–1 bar–1 and an oil removal efficiency of 98.5%. After 15 cycles of oil–water separation, the membranes maintain a high flux recovery rate of 85.6%. Moreover, the biomimetic membranes possess exceptional operational stability, as evidenced by consistent surface wettability under organic solvents, strong acid and high-salinity conditions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yacong Yang,Zhihao Cao,Tianhan Shen,Junyang Zhang,Zuofei Gu,Mingwan Zhao,Zongli Xie,Yingchun Miao,Yuning Huo,Hexing Li
The photocatalytic membrane systems show great potential for water purification and wastewater treatment with efficient energy utilization. Herein, we develop a synergistic photocatalytic-photothermal route, based on Pd-TiO 2 /PEDOT composite immobilized in PVDF membrane, for effective water permeability and reutilization property. Novel Pd-TiO 2 /PEDOT/PVDF ultrafiltration membrane is prepared by the phase inversion method with immobilizing Pd-TiO 2 /PEDOT obtained by ultrasonic irradiation. During the removal of HA under light irradiation, Pd-TiO 2 /PEDOT/PVDF membrane presents an unexpected increasing in water flux, when compared to pristine PVDF, Pd-TiO 2 /PVDF and PEDOT/PVDF membranes, with the highest normalized flux reaches up to 2.1 and remains as 1.3 even after 300 min of irradiation. This significantly enhances the water transport, along with the achieved high rejection and anti-fouling performance. It can be attributed to synergistic photocatalytic-photothermal effect of Pd-TiO 2 /PEDOT, which is realized by their strong interaction and uniform distribution. The addition of PEDOT promotes photocatalytic effect of Pd-TiO 2 by enhancing separation of photo-induced charges. High photothermal conversion efficiency of Pd-TiO 2 /PEDOT and low temperature difference in Pd-TiO 2 /PEDOT/PVDF membrane facilitate effective thermal storage, beneficial for water transport. Meanwhile, thermal energy promotes generation of more ∙OH and ∙O 2 – radicals to remove pollutants. Synergistic photocatalytic-photothermal contribution in Pd-TiO 2 /PEDOT/PVDF membrane shows significant potential for practical application.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Ganbin Luo,Bin Hu,Yuzhe Yang,Mingjie Ma,Huiling Cheng
Recovery of cobalt from wastewater is a key method for achieving resource sustainability. A novel temperature-sensitive Co(II)-ion-imprinted composite membrane based on polyvinylidene fluoride was synthesised using N-isopropylacrylamide as the temperature-sensitive monomer and diisooctylphosphinic acid as the ligand. The preparation conditions for the imprinted composite membrane were systematically optimised, resulting in an optimal polymer with an adsorption capacity of 938.61 mg·g −1 that achieved adsorption equilibrium in approximately 30 min, outperforming most reported cobalt ion adsorbents. The surface morphologies of the Co(II)-IICM 6 membranes prepared under the optimal conditions were analysed. The results showed that the ionic ligands enabled the polymer particles to grow successfully and uniformly on the membrane surface. The imprinted composite membrane's pore size increased as a result of this expansion, with the specific area increasing from 13.01 m 2 ·g −1 to 16.84 m 2 ·g −1 . The imprinted composite membrane maintained a high adsorption capacity over ten cycles and exhibited excellent selectivity for Co(II) ions in aqueous samples containing Co(II), Ni(II), Cr(III), Cd(II), Cu(II), and Pb(II). These results indicate that the prepared temperature-sensitive imprinted composite membrane is promising for the separation of Co(II) from real water samples.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuan Ji,Jichi Zhang,Yijie Liu,Guo Dong,Zaixing Jiang
The implantation of covered stents has significantly contributed much to the rescue treatment of coronary artery perforation (CAP). The ability to achieve rapid hemostasis in cases of severe coronary artery perforation using covered stents alone has so far been elusive. Here, we investigate a Janus composite covered stent for rapid hemostasis in CAP. The covered stent has the dual functions of sealing perforation and rapid hemostasis, which is suitable for the rescue of CAP. This achievement is realized by assembling the tough polyvinylidene fluoride (PVDF) membrane and the drug-loaded hemostatic coating, thereby amalgamating their distinct functionalities. The PVDF membrane served as a physical shield that prevented blood leakage and blocked procoagulant drugs from forming the thrombus in the vessel. Meanwhile, the drug-loaded hemostatic coating, when in contact with the perforation area, swiftly procoagulant. The in vitro cytocompatibility and coagulation property tests demonstrated excellent biocompatibility and hemostatic performance of the Janus composite covered stent. The approach is applicable across almost all sizes of common bare stents in clinical, which has great potential for the rescue of CAP.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Shengyou Wu,Shuaifei Zhao,Zhe Zhai,Yan Huang,Shiwei Liu,Hao Yang,Yuchao Zhao
Membrane distillation (MD) is a viable technology and potential candidate for desalination of hypersaline wastewater. Nevertheless, MD membranes with high flux and superior antiwetting ability face a significant challenge for realizing high-efficient desalination. Herein, polyvinylidene fluoride (PVDF) hydrophobic porous membranes are fabricated by non-solvent induced phase separation. The structure of PVDF membranes, such as pore type, size, porosity, and surface hydrophobicity, can be well tuned over a wide range via adjusting phase separation conditions. To enhance the robustness of PVDF membrane, hydrophobized halloysite nanotubes (HNTs) are blended for membrane fabrication. The enhanced mechanical strength of membrane increases wetting resistance via inhibiting pore deformation and LEP reduction during salt crystals growth. In the treatment of hypersaline wastewater (70 g∙L −1 ) containing 3 g∙L −1 CaCl 2 and 3 g∙L −1 Na 2 SO 4 via VMD, the HNTs/PVDF membrane with 50 wt% HNTs shows a high flux of 54 L∙m −2 ∙h −1 , over 99.99 % NaCl rejection, and outstanding stability for 100 h. Our work not only offers a novel strategy to enhance wetting resistance of MD membranes for hypersaline wastewater treatment, but also demonstrates that the mechanical strength of membranes also significantly influences antiwetting ability of MD membranes.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Liping Qiu,Fanduo Meng,Qi Qiu,Xinwei Kang,Shuai Gong,Fengxia Zhang,Jingtao Xu,Feihong Wang,Daoji Wu,Xuewu Zhu
Membrane fouling represents a substantial barrier to the progress of ultrafiltration membranes. The catalytic membrane integrates ultrafiltration with advanced oxidation processes; this provides an efficient solution to mitigate membrane fouling. In this study, CoFe 2 O 4 nanoparticles were integrated into polyvinylidene fluoride (PVDF) to develop a novel composite ultrafiltration membrane (PVDF@CoFe 2 O 4 ). The chemical composition, surface morphology, filtration performance, and catalytic ability of the synthesized PVDF@CoFe 2 O 4 membranes were systematically assessed. The hydrophilicity of the PVDF@CoFe 2 O 4 membrane was enhanced, and its water flux increased by up to 1.4 times using CoFe 2 O 4 doping. The PVDF@CoFe 2 O 4 membrane demonstrated the lowest degree of irreversible fouling and superior stability. In the presence of peroxomonosulfate (PMS), the 2.5 wt% PVDF@CoFe 2 O 4 membrane achieved a norfloxacin (NOR) removal efficiency of 82.5 % within 120 min; this value significantly exceeded the 17.82 % efficiency recorded for the pristine PVDF membrane. The synergistic effect of SO₄ •- and •OH led to the conversion of natural organic matter (NOM) into smaller molecules following oxidation, thereby enhancing the antifouling performance of the membrane. These findings provide a promising approach for mitigating NOM-induced membrane fouling in natural surface water.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Qianqian Yu,Haijun Wang,Chunlei Yuan,Tong Wang,Chao Yan
Due to the limitation of the intrinsic dielectric constant, the energy storage density of PVDF polymers cannot meet the needs of electronic materials. In this regard, this work focuses toward enhancing the dielectric and energy storage performance of PVDF by preparing PVDF nanocomposites impregnated with sepiolite modified with cetyltrimethylammonium bromide (CTAB@Sep) and carboxylated carbon nanotubes (C-MWCNTs). The results show that CTAB@Sep nanofibers can serve as efficient nucleation agents for γ-PVDF crystals. Furthermore, Sep nanofibers modified with CTAB can significantly promote the dispersion of C-MWCNTs through the electrostatic adsorption effect and then block the conductive path, therefore improving the dielectric and energy storage properties of PVDF-based composites. The dielectric constant of PVDF/CTAB@Sep/C-MWCNTs composites increases by 8 times compared with that of pure PVDF at 1 kHz, while the loss remains at only 0.08. Under an electric field of 110 kV·mm–1, the discharge energy density is 4.03 J·cm–3, and the energy storage efficiency reaches 81.85%. Therefore, this work provides an alternative strategy for preparing high-performance polymer-based energy storage materials under low field strength.
✓ 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）