DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 33
·11441-11450
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IF 4
Defeng Hu,Zhongqiao Sun,Yide Han,Hao Meng,Xia Zhang
Considering the surface affinity of MOFs and separation advantages of polymer membranes, herein, a one-step interface synthesis strategy is used in the construction of Cu-BTC/PVDF hybrid membranes, in which Cu2+ ions and 1,3,5-benzenetricarboxylic acid (H3BTC) were dissolved in ionized water and n-octanol separately, and polyvinylidene fluoride (PVDF) films were laid at the interface of two immiscible solvents. As a result, Cu-BTC was generated and readily self-assembled inside the PVDF films. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA) and the Brunauer–Emmett–Teller (BET) method were used to characterize Cu-BTC/PVDF hybrid membranes, and Congo red (CR) was selected as the target dye to evaluate the surface adsorption activity of the hybrid membranes. Batch adsorption tests under various conditions were conducted to optimize the adsorption capacity, adsorption kinetics, isotherms and thermodynamics, which were analyzed to further explore the adsorption behavior. Based on this, the adsorption mechanism was discussed. It is worth noting that because of the π–π stacking interaction and hydrogen bonding, an extraordinary adsorption capacity of CR was achieved, and the good separation advantage and the cyclic adsorption performances endow the resulting Cu-BTC/PVDF hybrid membranes with promising applications in the removal of organic dyes from practical wastewater.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Pingping Wu,Lin Li,Songtao Shao,Junchao Liu,Jingxia Wang
Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF(HFP)) are famous materials for developing flexible sensors, their conductivity, wettability, and piezoelectricity are affected by solvents. However, challenges remain in constructing multi-signals sensor by integrating PEDOT:PSS and PVDF(HFP) through solvent induced strategy, and existing sensors lack the intelligent extraction of stimulus information and accurate recognition of multimodal applications. In this work, a bioinspired flexible sensor with strain-pressure-humidity triple-signals is constructed based on PEDOT:PSS-PVDF(HFP) film (P-P film) through the synchronous induction effect of dimethyl sulfoxide (DMSO). The P-P film with double-layer structure presents excellent conductivity (800 S/cm), piezoelectricity (output voltage, 0.13 V-0.17 V), and humidity sensitivity (response/recovery time, 1.15 s/0.42 s). This phenomenon is resulted from the conformational transition of PEDOT, β -phase content enhancement of PVDF(HFP), and removal of insulated PSS under induction effect of DMSO. The data analysis, mining, and classification are performed through machine learning, which contribute to the recognition rates for different change degree of strain, pressure, and humidity are 93.35 %, 94.59 %, and 99.95 %, respectively. Importantly, a high-precision recognition (97.46 %) for multimodal applications is achieved by intelligently extract the features of strain-pressure-humidity triple-signals. This work is beneficial for improving the performance of existing sensors and developing new high-performance materials with the assistance of machine learning.
研究领域:
材料科学
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人工智能
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Dongni Li,Can Huang,Wei Zhou,Jianmei Xu,Zhihong Yang
Designing a multilayer structure is an efficient strategy to synthesize dielectric nanocomposite films with excellent dielectric properties and energy density. In this study, lead lanthanum zirconate titanate (PLZT)/poly(vinylidene fluoride) (PVDF) films with good dielectric properties and boron nitride nanosheet (BNNS)/PVDF films with high breakdown strength were prepared using the casting method. Then, a trilayer-structured film with a PLZT/PVDF layer sandwiched between two BNNS/PVDF layers was fabricated using the hot-pressing method. The effect of PLZT fillers with different dimensions on the electrical properties of the trilayer nanocomposites has been investigated. The results show that (BNNS/PVDF)–(PLZT/PVDF)–(BNNS/PVDF) nanocomposite films containing PLZT nanowires have excellent dielectric properties and energy density, with a dielectric constant of 10.34, a breakdown strength of 429.03 MV/m, and the maximum energy storage density nearly 5 J/cm3, far more than those of the biaxially oriented polypropylenes.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Zhang Yue,Zhu Bixuan,He Yu,Guo Jiacheng,He Ruiqi,Cai Chuanyezi,Ye Lu,Li Hongwei,Zhang Jianjun,Ma Sude
Polyvinylidene fluoride (PVDF) is one of the most widely studied polymers for the development of film capacitors with high energy density. However, it is still challenging to modulate the polarization hysteresis phenomenon of PVDF in a simple and effective way to achieve a significant increase in energy density. In this work, a low-loss amorphous polymer poly(methyl methacrylate) (PMMA) was introduced as a reinforcing phase to be blended with PVDF to form a matrix. The dielectric and energy storage performance of PVDF is improved by integrating the high dielectric property of barium titanate (BaTiO 3 ) with the low hysteresis property of PMMA. PMMA/PVDF-BaTiO 3 nanocomposites were prepared by spin-coating process. It was shown that the PMMA/PVDF-BaTiO 3 nanocomposites had a thin and flat macroscopic structure and a uniform and dense microstructure. The optimum dielectric constant of the nanocomposites was 12.9 at 100 Hz, and the optimum energy density was maximized to 6.5 J/cm 3 . Compared with the PVDF/PMMA composites, the dielectric and energy storage performance were significantly improved under the same conditions. This work provides a simple and effective strategy for obtaining polymer nanocomposites with high energy density and with potential as flexible dielectric substrates for film capacitors.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 33
·27485-27493
·
IF 3.289
Yunze Wang,Haibo Lin,Zhu Xiong,Ziyang Wu,Xuemin Yu,Yi Wang,Fu Liu
An interesting PVDF membrane with unusual thermoresponsive behavior was prepared by the incorporation of P(OEGMA-co-VTMOS). The P(OEGMA-co-VTMOS) copolymer was first in situ synthesized in a PVDF/triethyl phosphate (TEP) casting solution. A P(OEGMA-co-VTMOS) network was assembled in the PVDF membrane through hydrolysis and condensation during phase inversion. PVDF/P(OEGMA-co-VTMOS) in organic solvent demonstrated a typical LCST around 35 °C, reflecting the reversible transition of the coil-to-globule conformation. Microphase separation was responsible for the appearance of turbidity of the casting solution. FTIR, XPS, TGA and SEM confirmed the surface enrichment of the copolymer, especially in the membrane bottom. The hydrophilicity and protein anti adsorption were improved despite the temperature variation. In particular, AFM in aqueous media was conducted to determine the reversible morphology and water channel variation under heating and cooling. Different from common thermoresponsive membranes, the so-modified PVDF membranes exhibit a reversible abnormal change of pure water flux and BSA rejection with temperature. The intriguing thermoresponsive behavior and mechanism of the modified PVDF membrane was thoroughly investigated from the aspects of PVDF/TEP casting solution, membrane morphology in aqueous media and water/BSA filtration performance.
研究领域:
材料科学
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膜技术
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高分子化学
✓ 已验证
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2021
·Vol. 232
·期 12
·1-12
·
IF 2.52
Lei Yihao,Jin Kaihao,Lin Xing,He Liyin,Wu Yinqiu,Zhang Jianfeng
To improve the water quality, a new type of grafted poly(vinylidene fluoride) (PVDF) particles was designed and synthesized to adsorb trace Pb 2+ in water. Through the surface hydroxylation of PVDF particles, followed by the sequential coupling of gelatin, β-cyclodextrin (β-CD) and acrylic acid (AA) provide grafted PVDF particles (PAGCA) with multi-functionalized groups. The newly prepared PAGCA particles were characterized by FT-IR, XPS, and SEM. The results show that the PAGCA particles have excellent adsorption performance for Pb(II) in water and can remove Pb(II) rapidly and thoroughly with a removal rate of 100%. The adsorption capacity of PAGCA particles increased with the increase of solid–liquid ratio or pH value. The good adsorption performance of PAGCA particles was also demonstrated by completely removing 2.37 μg/L of Pb(II) from a river water sample. XPS and SEM analysis further confirmed the formation and adsorption of Pb(II) on the surface of PAGCA particles. The synthesized PAGCA particles also show good adsorption ability to cadmium(II) with a removal rate of 93.6% in single ionic water and 87.9% in river water, respectively. It is concluded that the combination of hydroxyl group, carboxyl group, and amino group on the surface of the new grafted PVDF particles greatly improves the adsorption capacity of PVDF particles for Pb 2+ , and it has a good application prospect in the removal of trace Pb(II) in water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 19
·3390
·
IF 5.719
Xinghua Liang,Yujuan Ning,Linxiao Lan,Guanhua Yang,Minghua Li,Shufang Tang,Jianling Huang
The stability and wide temperature performance range of solid electrolytes are the keys to the development of high-energy density all-solid-state lithium-ion batteries. In this work, a PVDF-HFP-LiClO4-Li6.4La3Zr1.4Ta0.6O12(LLZTO) composite solid electrolyte was prepared using the solution pouring method. The PVDF-HFP-LiClO4-LLZTO composite solid electrolyte shows excellent electrochemical performance in the temperature range of 30 to 60 °C. By assembling this electrolyte into the battery, the LiFePO4/PVDF-HFP-LiClO4-LLZTO/Li battery shows outstanding electrochemical performance in the temperature range of 30 to 60 °C. The ionic conductivity of the composite electrolyte membrane at 30 °C and 60 °C is 5.5 × 10−5S cm−1and 1.0 × 10−5S cm−1, respectively. At a current density of 0.2 C, the LiFePO4/PVDF-HFP-LiClO4-LLZTO/Li battery shows a high initial specific discharge capacity of 133.3 and 167.2 mAh g−1at 30 °C and 60 °C, respectively. After 50 cycles, the reversible electrochemical capacity of the battery is 121.5 and 154.6 mAh g−1at 30 °C and 60 °C; the corresponding capacity retention rates are 91.2% and 92.5%, respectively. Therefore, this work provides an effective strategy for the design and preparation of solid-state lithium-ion batteries.Keywords:lithium-ion battery;solid-state electrolyte;composite;electrochemical performance
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
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.
研究领域:
心脏病学
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生物材料
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止血
·
介入放射学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Ji-Hao Zuo,Chao Wei,Peng Cheng,Xi Yan,Yan Chen,Wan-Zhong Lang
Permeability and mechanical strength normally present an opposite trend for separation membranes . There is a trade-off line of permeability vs. tensile strength for the prepared poly(vinylidene fluoride) (PVDF) membranes via thermally induced phase separation (TIPS) method. In this work, TIPS-prepared PVDF membranes were fabricated with water (PVDF T-water ) and air (PVDF T-air ) as quenching bath for comparatively studying. PVDF T-air membranes present larger average pore size, higher permeability and better mechanical strength than those of PVDF T-water membranes due to the lower cooling rate of air bath. It is wonderful that all PVDF T-air membranes can break though the trade-off line of permeability vs. tensile strength of TIPS-prepared PVDF membranes. The optimal membrane (M-A30) shows superior performance, such as ultrahigh water flux of 3275 L m −2 h −1 ·bar −1 and tensile strength of 5.7 MPa. Additionally, this research provides a feasible method to regulate the morphology, pore size and permeability of TIPS-prepared PVDF membranes.
研究领域:
材料科学
·
膜技术
·
聚合物工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 30
·23530-23539
·
IF 3.84
Yanhui Xiang,Jianhui Shen,Yunze Wang,Fu Liu,Lixin Xue
Responsive materials with surfaces that have controllable oil wettability under water offer considerable potential in advanced applications. We have developed an economical and convenient method for constructing a superwetting polyvinylidene fluoride (PVDF) membrane, giving super-hydrophobicity under oil and super-oleophobicity under water. The membrane has been achieved by incorporating pH-responsive N,N-dimethylaminoethylmethacrylate (DMAEMA) hydrogels into PVDF using a combination of in situ polymerization and conventional phase separation. In pure or acidic water the poly-DMAEMA chains modify wettability by the protonation or deprotonation of their tertiary amine side-groups, affecting the wettability of the membrane under water. In addition, this responsive membrane has been utilized for the separation of surfactant-stabilized water-in-oil and oil-in-water emulsions. High flux and separation efficiency can be obtained, together with excellent antifouling properties, suggesting that the membranes will find wide application in the separation of oil and water systems.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Hu Wang,Jiangchao Chen,Pengfei Pang,Yiran Bai,Zhiqiang Zheng,Tao Huang,Kunpeng Jiang,Yunyun Zhao,Guisheng Zhu,Huarui Xu
The development of lithium-metal batteries (LMBs) with high energy density and safety is considered a top priority for the next generation of rechargeable batteries. However, the mitigation of the inevitable reaction between lithium and the liquid electrolyte (LE), as well as the subsequent formation of Li dendrites, poses a crucial challenge that needs to be addressed. Upgrading traditional LEs serves as a pivotal strategy in achieving this objective. Here, we report a ZIF-8@SiO 2 /PVDF-HFP (ZSPH) quasi-solid electrolyte (QSE) with ultra-multistage pore crosslinked network structure. The interconnected micro-stage pore structure in a honeycomb-like morphology of polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) and the rich multistage pore structure of nanoscale SiO 2 “armored” zeolite imidazolium ester backbone-8 (ZIF-8@SiO 2 ) collectively establish a multi-stage ion transport channel. This unique structure facilitates appreciable ionic conductivity (2.21 × 10 −3 S cm −1 at 30 °C) and provides a wide and stable electrochemical window (approximately 5.0 V). The Li/ZSPH9-LiPF 6 /Li quasi-solid-state cell demonstrates an impressive longevity of over 1800 h at a current density of 0.2 mA cm −2 . The high compatibility of the interface between electrode and ZSPH QSE and effective inhibition of Li dendrites growth create synergistic effects, which make it possible to realize high energy density and safe LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 13
·e202405849
·
IF 2
Juan Dai,Qixu Chen,Yue Li,Jin Wang,Yanchao Yin,Peiyu Zhao,Peichuang Li,Luying Wang
Graphical A defect-free PVDF/ZIF-8-LS membrane prepared by loading a continuous ZIF-8-LS film layer on the PVDF membrane exhibited high and stable adsorption performance for CR and TC removal, because of a good compatibility between PVDF membrane and ZIF-8-LS layer. Lignosulfonate (LS) enhances ZIF-8 dispersion and active sites but faces challenges in recovery and secondary pollution due to its powdered form. To address this, a polyvinylidene fluoride (PVDF)/ZIF-8-LS composite membrane was fabricated via vapor deposition, where LS promoted dense ZIF-8 growth and interfacial compatibility with PVDF. The resulting PVDF/ZIF-8-LS membrane shows a higher continuous, uniform and dense ZIF-8-LS layer without macroscopic cracks or obvious defects. In addition, the PVDF/ZIF-8-LS exhibits the best adsorption capacity of 110.6 mg g −1 for Congo Red, about 8.8 mg g −1 higher than the PVDF/ZIF-8, and 110.2 mg g −1 for tetracycline, respectively. With 92% capacity retention after three cycles and stability across pH 2–10. The more active adsorption sites facilitates the contact between the ZIF-8-LS layer and the adsorbed substance, in addition to the electrostatic, H-bonding, π-π interactions, and coordination bond are also conductive to the adsorption of PVDF/ZIF-8-LS. The excellent adsorption performance and good recyclability of the PVDF/ZIF-8-LS composite membranes exhibit a potential for adsorbing other contaminants from water.
研究领域:
材料科学
·
环境科学
✓ 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）