MATERIALS LETTERS
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2025
·
IF 2.7
Hasan Ali Hayder,Peng Shi,Rui Liu
A superhydrophilic and underwater superoleophobic PVDF membrane, coated with a functionalized copolymer hydrogel, was fabricated for oily water separation. The membrane achieved a permeate flux of 7750 L/(m 2 ·h) and a separation efficiency of 99.0 % for crude oil-in-water emulsions. The functionalized hydrogel also accelerated the coalescence and potential demulsification of the emulsion. This membrane offers a reagent-free and concentrate-free solution for the disposal of oily wastewater and a technique for crude oil recycling.
研究领域:
材料科学
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环境工程
·
化学工程
·
高分子材料
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膜科学技术
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Jintian Qian,Mingxia Feng,Dawu Lv,Ruiqin Tan,Wenfeng Shen,Weijie Song
Flexible humidity sensors play a crucial role in the real-time monitoring of human physiological activities by being integrated with smart terminals, compact medical devices and flexible electronic skins. In this work, a facile fabrication method of a flexible humidity sensor based on a composite material of poly(diallyldimethylammonium chloride) (PDDA) and polyaniline (PANI) using in-situ polymerization and dip-coating techniques was proposed on a microporous poly(vinylidene fluoride) (PVDF) filter membrane substrate. The resulting PDDA@PANI/PVDF-3.50 % sensor demonstrates remarkable sensitivity with a response of up to 5249 % across a humidity range of 11–97 % relative humidity (RH), minimal hysteresis (∼1.2 %), rapid response and recovery times (11 s and 28 s), stable performance under mechanical deformation, and excellent long-term durability. Additionally, the sensor can readily identify three breathing states and detect finger movements as short as 1 mm. The excellent performance is attributed to the hydrophilic modification and synergistic effect of PDDA on PANI chain, and the rich microporous structure of PVDF membrane. This work offers a novel strategy for developing advanced flexible sensors with significant potential in wearable electronic devices for healthcare and human-computer interaction.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.9
Yaofei Lin,Guangheng Wang,Xingxing Meng,Jiahuan Zhao,Hongju Wu,Wenying Zhou
Against the backdrop of the booming sophisticated electronics industry, polymer composites integrating superior dielectric permittivity ( ε ), low loss (tan δ ) and excellent breakdown strength ( E b ) have become a persistent pursuit in the research community. To simultaneously bolster the ε and E b in alumina (Al)/polyvinylidene fluoride (PVDF), in this study the neat Al particles were first surface-oxidized to thicken the alumina (Al 2 O 3 ) thickness and then encapsulated with a titanium dioxide (TiO 2 ) layer, followed by an investigation into the dielectric properties of the resulting Al@Al 2 O 3 @TiO 2 /PVDF composites. The results indicate that the Al@Al 2 O 3 @TiO 2 /PVDF exhibits a higher ε and E b but lower tan δ relative to pristine Al/PVDF. The elevated ε stems from the synergistic regulation of high-frequency fast intra-particle and low-frequency slow inter-particle polarizations in Al@Al 2 O 3 @TiO 2 /PVDF. The Al 2 O 3 @TiO 2 double-shell not only prevents direct contact between conductive Al but also induces deep traps immobilizing charges and lifts the energy barrier for captured charges de-trapping, thus restraining the tan δ and leakage current. Moreover, the double-shell effectively strengthens interfacial interactions and alleviates strong dielectric mismatch between the two components, leading to much reduced electric tree growth and improved E b . Theoretical simulation further reveals a profound understanding of the inherent multiple polarization mechanisms and the charge migration modulation induced by the double-shell structure. So, this work provides unique insights for realizing simultaneously high ε , superior E b and minimal tan δ via core@double-shell structure in percolating composites, which cannot be achieved in traditional composites, offering considerable application potential in power equipment and electric devices.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2017
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IF 4.075
Jiabin Feng,Shouhu Xuan,Li Ding,Xinglong Gong
This work reported a high performance flexible magnetically controllable actuator based on magnetoactive elastomer (MAE) and poly (vinylidene fluoride) (PVDF) composite film . The magnetic-mechanic-electric coupling properties of the actuator were systematically investigated by cyclical wrinkle, magnetic bending, and stretching test. The induced charge under a magnetic bending can reach as large as 158 pC even at small magnetic field of 100 mT with the bending angle up to almost 90° within 0.6 s. Moreover, a new model was proposed to theoretically reveal the intrinsic correspondence. The model matches well with the experimental results. Based on this kind of actuator, a magnetically controllable tentacle is developed, which could grasp, transport, and release object by switching the supplied current. Due to the real-time deformation feedback characteristics, this kind of actuators can find wide applications in actively controllable engineering, artificial robotics, and biomedicine.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2019
·
IF 6.282
Wenjing Ji,Hua Deng,Cong Guo,Chengxiao Sun,Xuan Guo,Feng Chen,Qiang Fu
The incorporation of linear shaped fillers is thought to be able to effectively enhance the dielectric properties of polymer based composites. However, the effect of electrospinning and subsequent calcination processing on the morphology of the fillers and the dielectric performance of the polymer based composites is still unclear. Herein, we demonstrate that filler illustrating two morphological characteristics at the same time, obtained by selecting optimum electrospun precursor concentration before calcination . It is demonstrated that the final filler morphology varies from linear to intermedia (linear and droplets), to droplets with increasing tetrabutyl titanate concentration in the electrospun solution. For filler consisting both linear and droplets characteristics, a maximum energy density of 12.54 J/cm 3 is reached at breakdown strength of 393 kV/mm, with a charge and discharge energy efficiency around 76%. Therefore, this could provide new insight into for the preparation of linear shape based fillers for high performance dielectric polymer composites .
研究领域:
材料科学
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聚合物复合材料
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介电材料
·
纳米纤维技术
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Jingyi Cao,Jun Pan,Zhaoliang Cui,Zhaohui Wang,Xiaozu Wang,Enrico Drioli
Membrane condenser (MC) is a novel and promising operation to recover evaporated water from highly humid gas discharged from industrial production. By means of hydrophobic membrane surface, water vapor condensed on membrane retention side, finally be collected. The aim of this paper is to enhance the recovery efficiency of poly(vinylidene fluoride) (PVDF) membrane in MC process. Significantly, coating three kinds of Hyflon ADs onto PVDF membranes effectively improved hydrophobicity of original ones. Among them, Hyflon AD40L/PVDF membrane showed the best membrane and MC performance, the LEP w and water contact angle of which reached 0.43 MPa and 126°, respectively. In terms of dehydration performance in MC, by coated with Hyflon AD40L, water recovery was increased from 7.92% to 18.85%, and condensate water flow (0.35 kg·m −2 ·h −1 ) was twice that of pristine ones (0.15 kg·m −2 ·h −1 ). These results indicate that Hyflon AD composite membrane is a promising candidate for MC process with high efficiency.
研究领域:
环境工程
·
膜科学
·
水资源回收
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工业废气处理
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高影响因子
ChemNanoMat
·
2026
·Vol. 12
·期 1
·e202500571
·
IF 2.6
Jufei Xu,Jie Yu,Neng Hu,Qi Zhong
The continuous existence of antibiotic pollutants presents a grave threat to the ecological environment. This study aims to develop an efficient and stable hybrid photocatalytic membrane for degrading tetracycline (TC) in aqueous solutions. Inspired by setaria, the novel hybrid ZIF-8@ZnO/polyvinylidene fluoride (PVDF) membranes (PZM) are successfully prepared by in situ growth of ZnO nanowires on PVDF membranes via hydrothermal synthesis, followed by incorporation of the metal–organic framework material ZIF-8. The preparation conditions for ZnO nanowires are systematically optimized. Results indicate that the prepared ZnO/PVDF membranes (PZ) exhibit optimal photocatalytic activity when the ZnO precursor concentration is 0.5 wt% and the hydrothermal growth time is 2 hr. Additionally, with the increased stirring rate of the reaction system, the superior piezoelectric properties of the PVDF nanofiber membranes are applied to accelerate TC degradation. Most importantly, compared to pure PZ membranes, the hybrid PZM membranes significantly enhance the photocatalytic degradation efficiency of TC. Under visible light irradiation, the hybrid PZM nanofiber membranes achieve TC degradation efficiency of 75%, which is increased by 66% compared to that of ZnO powder. This investigation offers a potentially viable approach for the design and construction of hybrid photocatalytic materials for effectively eliminating emerging organic pollutants from water.
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Surfaces and Interfaces
·
2026
·
IF 6
Ruiying Xu,Ximing Cui,Dongmei Wu,Jinlian Li,Naitian Zhang,Xiaoyan Yu,Yanli Zhao,Zhongjun Cheng
A semi-exposed structured PVDF-TiO 2 coating is designed via a facile spraying strategy. • A coating with bidirectional selective emulsion separation has been reported. • The coating exhibits excellent antibacterial properties. • Multifunctionality is exhibited by the prepared coating. In view of the intensified pollution of oily wastewater caused by industrialization and urbanization, as well as the separation challenges posed by the coexistence of stable oil-in-water (O/W) and water-in-oil (W/O) emulsions, this paper proposes a multifunctional coating solution integrating bidirectional emulsion separation and antibacterial properties to address the problems of single function and susceptibility to microbial contamination in existing separation materials. Through a stepwise spraying strategy, a novel PVDF-TiO 2 semi-exposed composite coating was constructed. In this design, polyvinylidene fluoride (PVDF) serves as both the film-forming substrate and a binder, immobilizing TiO 2 nanoparticles to form a micro-nano rough structure. By controlling the process, TiO 2 is semi-embedded on the PVDF surface, endowing the coating with superhydrophilicity and superoleophilicity, thereby achieving unique bidirectional wetting behavior characterized by underwater superoleophobicity and underoil superhydrophobicity. Experimental results demonstrate that the coating not only efficiently separates O/W and W/O emulsions (separation efficiency >99 %) but also rapidly treats immiscible oil/water mixtures (with a flux as high as 5.6 × 10 4 L·m -2 ·h -1 and efficiency >98 %). Simultaneously, the exposed TiO 2 imparts photocatalytic self-cleaning ability and long-lasting antibacterial activity to the coating, effectively addressing the issue of membrane fouling. Furthermore, the coating features a simple preparation process, environmentally friendly raw materials, broad substrate adaptability, and exhibits remarkable mechanical durability. This study achieves functional synergy and complementary advantages between the film-forming property of PVDF and the functionality of TiO 2 through the semi-exposed structure, offering a novel strategy for developing multifunctional separation materials for the treatment of complex oily wastewater. Download: Download high-res image (209KB) Download: Download full-size image
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Batteries & Supercaps
·
2026
·Vol. 9
·期 5
·e70320
·
IF 4.5
Taiyu Yang,Wujie Yang,Zhenjie Zhang,Aoyuan Chen,Hui Pan,Ping He
Despite their mechanical robustness and high-voltage stability, poly(vinylidene fluoride) (PVDF) solid polymer electrolytes are hindered by sluggish Li + transport, stemming from anion-dominated conduction and residual solvent-induced interfacial degradation. This study addresses these issues by introducing zinc borate (ZB) as a filler into the PVDF electrolyte and preparing the composite electrolyte PVZB, thereby reconstructing the lithium-ion solvation structure and stabilizing the electrode interface, elevating the Li + transference number to 0.49, and boosting room-temperature ionic conductivity to 3.3 × 10 −4 S cm −1 . Crucially, a rich inorganic solid electrolyte interphase enables stable cycling of Li/PVZB/Li cells for 3000 h at 0.1 mA cm −2 . NCM811/PVZB/Li cells deliver 78.5% capacity retention after 400 cycles at 4.3 V with excellent Coulombic efficiency (99.2%). Graphical A dual-enhancement strategy for PVDF electrolytes is achieved by zinc borate, which simultaneously reconstructs the Li + solvation structure and drives the formation of an inorganic-rich SEI.
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高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 5.2
Qiu Han,Zhang Yiming,Xu Mohong,He Hezhi,Zhu Zhiwen,Huang Yunzhi
Poly(vinylidene fluoride) (PVDF) nanofibers hold great
promise
for self-powered sensing and energy harvesting. However, simultaneously
achieving high piezoelectric charge and voltage coefficients and a
high electromechanical figure of merit remains challenging because
charge generation, voltage output, and dielectric response are intrinsically
coupled. Herein, we report a synergistic strategy that integrates
negative-polarity electrospinning with grid-controlled corona poling
to jointly amplify charge and voltage responses in PVDF nanofibrous
membranes. Negative-polarity electrospinning was associated with a
higher relative β-phase fraction of 96.28% without markedly
changing the overall crystallinity, together with polarity-dependent
differences in the near-surface chemical environment. Combined structural,
surface-chemical, dielectric, ferroelectric, and piezoelectric analyses
suggest that these pre-existing features may influence the subsequent
corona-poling response. The enhanced response is discussed within
a proposed preconstruction–activation framework, in which corona
poling may further align polar domains and introduce charge-related
polarization states. Consistent with the proposed coupling between
crystal polarization and near-surface charge-related effects, the
optimized PVDF(−15) membrane delivers an ultrahigh apparent d 33,eff of 264.4 ± 7.9 pC/N, a calculated
effective g 33 of 7.337 V·m/N, and
a calculated effective FOM of 1.9399 × 10 –9 m 2 /N. The resulting device further exhibits high voltage
sensitivity to subtle dynamic mechanical stimuli and excellent long-term
fatigue resistance, highlighting its potential for diverse self-powered
sensing applications. This work identifies electrospinning polarity
as a useful processing variable for tuning the device-level electromechanical
response of PVDF nanofibrous membranes.
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DESALINATION
·
2025
·
IF 9.8
Shengchao Chen,Dudu Yang,Longbo Xia,Mei-Ling Liu,Kecheng Guan,Dong Zou,Hideto Matsuyama
Membrane distillation (MD) suffers from challenges in industrial applications because of membrane wetting caused by hydrophobic decay. Although surface modifications such as nanoparticle loading or chemical grafting have been explored, weak interfacial adhesion and functional component detachment persists. This paper presents a novel dissolution-phase separation strategy for fabricating robust poly (vinylidene fluoride) (PVDF)/polystyrene (PS) composite membranes for MD. The hydrophobic PS microspheres and PVDF were dissolved in a PolarClean solvent to prepare a dilute solution. A PVDF base membrane was immersed in this solution and transferred to a water bath for phase separation, wherein the surface of the base membrane was dissolved in the PVDF/PS/PolarClean solution to form new PVDF/PS micro–nanostructures. The PS microspheres were entangled with molecular chains of PVDF and stably formed on the base membrane surface by controlling the solution temperature, immersion time, and concentrations of PVDF and PS in the dilute solution. The newly formed PVDF/PS micro/nanostructures significantly enhanced the antiwetting properties of the membrane. In contrast to conventional modification strategies, this method utilizes inherent hydrophobicity and micro/nanoscale structures of PVDF and PS for reinforcing the hydrophobicity of the resulting membrane, which significantly improves its stability. After 48 h of the MD process, the optimized PVDF/PS membrane exhibited a stable flux of 29.8 kg·m −2 ·h −1 and 23.1 kg·m −2 ·h −1 for 35 and 100 g/L saline water with all salt rejections above 99.9 %. In addition, the membrane demonstrated excellent performance in treating simulated dye wastewater, which maintains a high water flux above 20 kg m −2 h −1 with near-complete dye rejection and 99.9 % salt rejection.
研究领域:
膜科学
·
环境工程
·
材料科学
·
分离技术
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Hengyang Mao,Shouyong Zhou,Meisheng Li,Rong Wang,Zhong Ma,Huifang Xiao,Ailian Xue,Yijiang Zhao,Wenbo Peng,Chenglung Chen
Membrane separation is an efficient strategy to disrupt the spread of pathogens in an aqueous solution and produce clean water, but its performance is seriously affected by fouling caused by bioadhesive. In this study, novel pH-response attapulgite (p-ATP) nanofibers were prepared and applied in the modification of poly(vinylidene fluoride) (PVDF) ultrafiltration membrane for bovine serum albumin (BSA) solution purification. Poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) was grafted onto the surface of attapulgite (ATP) to offer pH-response property and to improve compatibility with PVDF. p-ATP is a hydrophilic material, which can increase the anti-biofouling performance of PVDF, and its one-dimensional structure is beneficial for enhancing the inter-entanglement with organic chains in the membrane matrix. The resultant composite membrane loaded with 7% p-ATP presented 77.2% and 108.1% increase in stationary permeance and mechanical strength, respectively, than that of the pristine PVDF membrane. Furthermore, the PDMAEMA chains in p-ATP will be shrunken or swollen with the change of pH value, resulting in adsorbing or releasing water molecules. This process is effective to mitigate the adhesion between biofoulants and membrane and can break the already formed biofouling layer. So, the composite membranes are easily to be cleaned via a simple pH-change cleaning process. The molecular dynamic simulation was also conducted to analyze the high performance of the PVDF/p-ATP membrane to provide theoretical support.
研究领域:
环境科学与工程
·
材料科学与工程
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高影响因子
危险品化学品经营许可证（带存储）