JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jun Yu,Tiantian Yue,Mengqi Wang,Yi Liu,Fan Liao,Zhenhui Kang,Yuqing Liu
Flexible piezoelectrics are pivotal for self-powered wearable systems, yet low-dimensional materials like PVDF fibers suffer from inefficient β-phase crystallization and limited charge transport. Here, coaxial wet-spun polyvinylidene fluoride (PVDF) fibers integrated with carbon quantum dots (CDs) overcome these limitations via solvent-nonsolvent phase separation and mechanical stretching. A 3 wt% CDs doping induces 75.96 % β-phase content through interfacial hydrogen bonding, achieving a high piezoelectric coefficient (d 33 of 28 pC/N) and output performance of 19.4 V and 0.2 μA, which is 86.7 % surpassing pristine PVDF(15 pC/N), and Under optimal experimental conditions, the peak voltage and current can reach up to 31 V and 0.2 μA. Cyclic durability tests (3 Hz, 20 N, 1000 cycles) confirm excellent stability with > 90 % performance retention. Practical applications highlight rapid capacitor charging (5 V in 30 s) and the ability to power nine LEDs. Additionally, bending sensitivity (3.6 V at 60°) and motion sensing (9 V for arm bending) validate its adaptability for wearable electronics and IoT applications, offering a scalable strategy for high-performance flexible energy harvesters.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Ming Yan,Yilin Wu,Xinlin Liu
Herein, Au-TiO 2 nanocomposite photocatalysts were initially constructed through a three-step-synthesis strategy including the sodium citrate reduction method, sol-gel method and high-temperature hydrothermal method . After that, Au-TiO 2 /PVDF photocatalytic nanocomposite membranes with visible light response were synthesized by a phase conversion process, thereinto, the Au-TiO 2 nanocomposite and PVDF powder were mixed into casting solutions by physical blending. Various characterization methods, such as SEM, TEM , FTIR, XRD , XPS , WCA and UV-vis DRS , etc., were used to systematically characterize the micromorphology, structural composition, wettability and optical properties of different samples. The UV-vis DRS results showed that the as-prepared nano-Au doping structure effectively enhanced the utilization factor of visible light in the process of photocatalytic degradation. The antifouling results of BSA adsorption experiments showed that 0.3-Au-TiO 2 /PVDF composite membranes possessed good antifouling performance. By analyzing the regeneration stability experiments, it could be found that the 0.3-Au-TiO 2 /PVDF composite membranes also exhibited excellent regeneration stability and easy separation and recovery features. The photocatalytic degradation of different membranes under visible light was investigated with tetracycline. The results showed that the photocatalytic degradation rate of 0.3-Au-TiO 2 /PVDF nanocomposite membranes reached 75% within 120 min. Moreover, the first-order kinetic linear fitting showed that the k value of 0.3-Au-TiO 2 /PVDF composite membranes was 0.01212 min −1 , which was 2.7 times and 2.0 times higher than that of 0.1-Au-TiO 2 /PVDF and 0.5-Au-TiO 2 /PVDF composite membranes. That is to say, photocatalytic activity of 0.3-Au-TiO 2 /PVDF composite membranes were obviously improved.
研究领域:
环境科学
·
材料科学
·
光催化技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Wei Miao,Zhong-Kun Li,Xi Yan,Ya-Jun Guo,Wan-Zhong Lang
Sulfonated grapheme oxide (SGO) nanohybrids were synthesized and employed to modify polyvinylidene fluoride (PVDF) hollow fiber ultrafiltration membranes accompanied with perfluorosulfonic acid (PFSA). Due to the synergism effects of PFSA and SGO, the SGO-blended PVDF membranes exhibit high permeability, anti-fouling performances and improved chemical resistance. SGO addition leads to thinner skin and porous sublayer of the membranes. The pure water permeability increases from 87.8 to 174.2 L·m −2 ·bar −1 ·h −1 by adding 0.5 wt% SGO nanohybrids in dope, and then slightly decreases to 156.2 L·m −2 ·bar −1 ·h −1 for M1.0 with further addition to 1.0 wt%. After five fouling-cleaning cycles, SGO-modified PVDF membranes show less flux decline and more stable solute rejection than the unmodified one, which demonstrate that SGO nanosheets act as a chlorine barrier for the PVDF membranes, resulting in an outstanding anti-fouling ability and an effective suppression of the membrane degradation under frequent oxidative cleaning.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Jing Jie,Yulong Liu,Lina Cong,Bohao Zhang,Wei Lu,Xinming Zhang,Jun Liu,Haiming Xie,Liqun Sun
Poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) based gel polymer electrolytes are widely studied owing to their electrochemical stability and high dielectric constant. However, most gel polymer electrolytes show unsatisfied safety and interface compatibility due to excessive absorption of volatile and flammable liquid solvents. Herein, by using a safe solvent (N-methyl-2-pyrrolidone) with higher boiling (203 °C) and flash points (95 °C), we initiatively fabricate a flexible PVDF-HFP based gel polymer electrolyte . The obtained gel polymer electrolyte demonstrates a high ionic conductivity of 7.24 × 10 −4 S cm −1 , an electrochemical window of 5.2 V, and a high lithium transference number of 0.57. As a result, the synthesized polymer electrolyte exhibits a capacity retention of 70% after 500 cycles at 0.5 C, and a discharge capacity of 86 mAh g −1 even at a high current rate of 10 C for LiFePO 4 based Li metal batteries. Moreover, a stable Li plating/stripping for more than 500 h is achieved under 0.1 mAh at both room temperature and 70 °C. Our results indicate that the PVDF-HFP polymer electrolyte is promising for manufacturing safe and high-performance Li metal polymer batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2016
·
IF 1.272
Guo-Rong Xu,He-Li Zhao,Shui-Bo Wu
Desalination provides an effective method to solve the problem of freshwater shortage, which is currently the most urgent issue around the world. Among all the desalination methods, membrane desalination is superior to others due to its unique advantages, such as easy operations and high separation performance. Specially, polyamide thin-film composite (PA-TFC) reverse osmosis membranes are the dominant desalination membranes in recent decades and have been widely used all around the world. However, the comparatively high operating pressures and low water permeations make them non cost-effective and have seriously restricted their wider applications. Electrospun nanofibrous membranes (ENMs) have shown great promising applications in the filtration areas. ENMs-based filtration membranes can provide higher permeations under the same operating conditions. Therefore, in the current work, a novel PA-TFC membrane supported by ENMs is designed. The ENMs-supported PA-TFC membranes show apparently high water flux (2.06 L m−2 h−1 bar−1) with a salt rejection of 94.4%. More importantly, the operating pressure is only 8 bar, which is lower than most of the currently used and researched PA-TFC membranes. The fabricated membranes are more cost-effective and can be used in some unique desalination areas which need as high as permeations and moderate salt rejections.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Guilin Dong,Faxiang Feng,Shi Su,Zanming Zhu,Xiaobing Liu,Runlin Han
Nanofiltration can be used to concentrate antibiotics and separate inorganic salts in the antibiotic fermentation process, replacing traditional evaporation and concentration methods and saving energy. To address the issues of poor separation selectivity for antibiotics and susceptibility to biofouling in traditional separation membranes, quaternized poly(vinylidene fluoride) (QPVDF) nanofiltration membrane was prepared with immersion phase inversion method by grafting allyltrimethylammonium chloride (ATAC) onto PVDF using atom transfer radical polymerization (ATRP) technology. This process creates a nanofiltration membrane that exhibits a synergistic effect of permselectivity and hydrophilicity enhancement. The modified membrane shows a 2.6-fold increase in water flux (up to 45.9 L·m −2 ·h −1 ) with a water contact angle reduction of about 20°. Experimental results showed that the QPVDF membrane retained 91 % of tetracycline hydrochloride (TC) and only 4.7 % of NaCl, with an antibiotic/salt separation coefficient of 10.6. The QPVDF membrane showed excellent antibacterial properties and inhibited more than 98 % of Escherichia coli ( E. coli ). It also experienced stable rejection to TC in 10 h of continuous operation, demonstrating good antifouling performance. The QPVDF membrane has significant potential applications in the field of efficient antibiotic desalination in wastewater.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Dongdong Kang,Huiju Shao,Guijing Chen,Xiaoliang Dong,Shuhao Qin
The separation of dyes and salts is very challenging in regards to treating high salinity textile wastewater. To effectively dispose dye/salt mixtures, it has become urgent to develop highly permeable and antifouling nanofiltration membranes. Herein, a novel loose nanofiltration membrane was fabricated by combining blending with interfacial polymerisation. Polyvinylidene fluoride (PVDF)/styrene-maleic anhydride (SMA) copolymer membranes with uniform microstructures were achieved via phase inversion by controlling the miscibility. Numerous carboxyl groups were gathered on the surface due to the amphiphilic SMA segregation during the membrane formation. Carboxylated carbon nanotubes (CNT-COOH) were used to further tune the membrane microstructures and promote the carboxyl groups segregation onto the surface. Ultimately, polyethylenimine (PEI) and triethanolamine (TEA) were co-deposited on the membrane surface by the amidation reaction and hydrogen bonding to form a loose structure. The optimized membrane exhibited high dye rejections to Congo red (99.9%), methyl blue (96.7%), acid fuchsin (96.1%), and low salt rejections to NaCl (1.7%), MgCl 2 (4.5%), MgSO 4 (1.2%). Significantly, it possessed a permeate flux of up to 251.6 L/m 2 ·h·bar during the dye/salt mixtures filtration. Moreover, the optimized membrane also performed excellent antifouling properties toward proteins and dyes. Overall, this work provides a promising loose nanofiltration membrane for textile wastewater treatment .
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2019
·
IF 0
Pei Xu,Zhaopei Cui,Hanyang Chen,Yunsheng Ding
To investigate the synergies of graphene and BaTiO 3 on the morphology and dielectric behavior of poly(vinylidene fluoride) (PVDF), γ-oxo-pyrenebutyric acid-modified graphene (GPA) and BaTiO 3 were incorporated into PVDF matrix by using solution-cast and hot-pressing method. π-π interaction between graphene (Gra) and γ-oxo-pyrenebutyric acid (PA), and the hydrogen bonding effect between hydroxy groups on BaTiO 3 and PVDF can improve the dispersity of Gra and BaTiO 3 in PVDF matrix. The addition of BaTiO 3 improved further the dielectric permittivity that originates from high dielectric BaTiO 3 , and remarkable interfacial polarization effect between PVDF and fillers, and the non-conducting organic groups of PA can support the low loss and conductivity in PVDF/GPA/BT composites that shows potential application as high dielectric material over a broad temperature range.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
ACTA PHYSICO-CHIMICA SINICA
·
2015
·Vol. 31
·期 10
·1905-1913
·
IF 0.852
ZHANG Jia-Han,GUO Gui-Bao,AN Sheng-Li,HAO Yan,ZHANG Dong,YAN Kai-Bo
Poly(vinylidene fluoride)-graft-poly(sulfobetaine methacrylate) (PVDF-g-PSBMA) proton exchange membranes were synthesized via single-step grafting sulfobetaine methacrylate (SBMA) onto PVDF. Benzoyl peroxide (BPO) was the initiator, and the PVDF was initially modified by tetramethylammonium
hydroxide (TMAH) in the liquid phase. Microstructure morphologies and sulfur distributions in the membrane were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM-EDX), respectively. The PVDF formed C=C
double bonds following dehydrofluorination by TMAH. SBMA was grafted onto the modified PVDF backbones, forming a homogeneous sulfur distribution in the interior and exterior of the membrane. Proton conductivities and methanol permeabilities of PVDF-g-PSBMA membranes increased with the increasing
of the TMAH mass fraction in methanol. When the mass fraction was 20%, the proton conductivity of the membrane was 0.0892 S·cm-1 at 20 , and the methanol permeability was 4.04 × 10-7 cm2·s-1 at ambient temperature, respectively.
The membrane exhibited good thermal stability up to 270 , as verified by thermogravimetric analysis (TGA). With this membrane, the peak power density of a direct methanol fuel cell (DMFC) was 17.06 mW·cm-2.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 11
·2701
·
IF 3.623
Xin Guo,Shunchang Li,Fuhua Chen,Ying Chu,Xueying Wang,Weihua Wan,Lili Zhao,Yongping Zhu
Gel polymer electrolytes have the advantages of both a solid electrolyte and a liquid electrolyte. As a transitional product before which a solid electrolyte can be comprehensively used, gel polymer electrolytes are of great research value. They can reduce the risk of spontaneous combustion and explosion caused by leakage during the use of conventional liquid electrolytes. Poly(vinylidene-fluoride-co-hexafluoropropylene) (PVDF–HFP), a material with excellent performance, has been widely utilized in the preparation of gel polymer electrolytes. Here, PVDF–HFP-based gel polymer membranes with polyvinyl pyrrolidone (PVP) pores were prepared using a phase inversion method, and Octavinyl-polyhedral oligomeric silsesquioxane (OVAPOSS) was doped to improve its temperature resistance as well as its ionic conductivity, to enhance its safety and electrochemical performance. The final prepared polymer membrane had a porosity of 85.06% and still had a certain mechanical strength at 160 °C without any shrinkage. The gel polymer electrolyte prepared with this polymer membrane had an ionic conductivity of 1.62 × 10−3S·cm−1at 30 °C, as well as an electrochemical window of about 5.5 V. The LiCoO2-Li button half-cell prepared therefrom had a specific capacity of 141 mAh·g−1at a rate of 1C. The coulombic efficiency remained above 99% within 100 cycles and the capacity retention rate reached 99.5%, which reveals an excellent cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Ming Wang,Zewen Xu,Yingfei Hou,Peng Li,Haixiang Sun,Q. Jason Niu
The separation and recovery of oil from oily wastewater was still challenging due to the limitations of conventional separation techniques in its limited application fields, high operation cost and low separation efficiency. Membrane separation was a novel candidate to satisfy various separation tasks. Seeking for an efficient and facile strategy to manipulate the membrane performance was urgently needed. Chinese ink was a promising material to functionalize the membrane by virtue of the self-adhesion and intrinsic hydrophilicity. Herein, a composite polyvinylidene fluoride (PVDF) microfiltration membrane was fabricated via a facile rub-coating strategy. The micro/nano structures derived from the nanoparticles in Chinese ink readily facilitated the membrane with the superhydrophilicity and underwater superoleophobicity (underwater various oils contact angle above 150°, underwater dichloromethane roll off angle ~ 3°). The composite membrane exhibited a high permeation flux, a considerable separation efficiency for separating various oil-in-water emulsions and a superior recyclability for separating gasoline-in-water emulsion in ten cycles. Moreover, the membrane maintained a desirable underwater dichloromethane contact angle (above 145°) after respectively being immersed in pH = 1 HCl, pH = 13 NaOH and 3.5 wt% NaCl solutions for one week, and a sandpaper abrasion test, demonstrating an excellent chemical stability and a robust mechanical durability.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Peng Zhou,Shihong Zhang,Yi He,Jingcheng Wu,Liang Zhou,Xiangying Yin,Shuting Tian,Shuangshuang Li,Wen Chen
With industry development, the reuse of water and oil resources has become an urgent problem. At present, the evolution of simple-minded approaches to attain modification on the membrane surface for a more complex circumstance, such as oily wastewater and dyes at the same time, has become a red-hot but challenging topic for research. Membrane separation technology has successfully built up to cope with these issues, such as oil-in-water emulsion separation and dye adsorption owning to its benign mechanical characteristics and low power consumption. Therefore, we report a simple-minded one-step approach for uses in oil-in-water emulsion separation and dye adsorption. In this work, a new multifunctional membrane surface is constructed via the concurrent incorporation of silk fibroin (SF) and dopamine hydrochloride (DA) in co-deposition to reach a large flux for complex wastewater separation. The qualified membrane has super hydrophilic in the air and has brilliant oil adhesion resistance underwater. It works comfortably on oil-in-water emulsions (over 10400 L m −2 h −1 bar −1 ) or dyes (above 3738.68 mg m −2 ). More importantly, excellent adsorption efficiency (>99%) and extensive adsorption capability (over 2071.91 mg m −2 ) were achieved by the oil-in-dye emulsion that stabilized with surfactant. It not only possesses a broad span of use outlooks but also enlightens imports for the evolution of functional coating in the future.
研究领域:
环境科学
·
材料科学
·
化学工程
·
水处理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）