JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Yuruo Feng,Jing Liang,Xinhui Liu,Kexuan Gao,Ying Zhang,Ao Li,Chao Chen,Li-an Hou,Yu Yang
Biofouling has always been a persistent problem impeding the applications of membranes in water treatment. Quorum sensing (QS) inhibitors are able to interfere with bacterial cell-to-cell communication to alleviate membrane biofouling, among which, methyl anthranilate (MA) aims at disrupting the Pseudomonas quinolone signal (PQS)-mediated QS system to inhibit biofilm formation. In this study, we developed a novel anti-biofouling membrane via immobilizing MA on graphene oxide (GO) nanocarrier, which was then successfully coated onto a polyvinylidene fluoride (PVDF) membrane through layer-by-layer assembly method. The introduction of QS inhibitor MA suppressed the expression of PQS synthesis gene pqsABCDE , N-acyl homoserine lactones (AHL) synthesis gene lasI , rhamnolipid synthesis gene rhlA and PQS receptor gene pqsR , thereby mitigating biofilm formation on the modified membrane. GO on membrane surface contributed to the reduction of bacterial initial adhesion. The synergistic effect of GO and MA endowed the modified membrane with dual resistance to biofouling. Compared with the virgin membrane, the extracellular polymeric substances (EPS), ATP and total cell fluorescence on GO/MA-PVDF membrane (GO:MA = 1:3, 5 layers) were substantially reduced by 50%, 73% and 86%, respectively, illustrating its excellent anti-biofouling capability. Notably, the incorporation of GO/MA was still efficient when treating real secondary effluent, with the evidence of lower flux decline and restrained biofilm formation. Taken together, we believe that GO/MA-PVDF membrane with both anti-adhesion and anti -biofilm capability has broad prospects for biofouling control in water treatment.
研究领域:
环境工程
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水处理
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材料科学
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微生物学
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产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 49
·29362-29372
·
IF 3.119
Lingzhu Zhao,Zhipeng Sun,Hongbing Zhang,Yuli Li,Yan Mo,Feng Yu,Yong Chen
Lithium iron phosphate (LiFePO4) is one of the most widely used cathode materials of lithium ion batteries. However, its commercial binder polyvinylidene fluoride (PVDF) is costly, less environmental-friendly and unstable during the long cycling process because of the weak van der Waals forces between the PVDF binder and electrode materials. Herein, an aqueous binder was designed using methacrylate-modified gelatin through UV photo-crosslinking. The crosslinked network and specific functional groups (carboxyl and amino) of the gelatin binder are superior in stabilizing the LiFePO4 electrode structure during long cycles by mitigating the formation of cracks and suppressing the detachment of electrode materials from the Al current collector. The LiFePO4 electrode with gelatin binder displays a high capacity of 140.3 mA h g−1 with 90.1% retention after 300 cycles at 0.5C, which are both superior to that of the PVDF binder (only 114.4 mA h g−1 and 74.8%). This work provides a promising binder to replace the commercial PVDF binder for practical application in energy storage systems.
研究领域:
材料科学
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电化学
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能源存储系统
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
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IF 10.7
Yuan He,Xulong Jing,Tianxing Lai,Dong Jiang,Chao Wan,Pavel S Postnikov,Olga Guselnikova,Lixin Xu,Xiaojun He,Yusuke Yamauchi,Biyu Jin
The application of polyvinylidene fluoride (PVDF) binder in lithium-sulfur batteries faces challenges due to inadequate adhesion, undesirable conductivities, limited lithium polysulfides absorbability, and its dependence on the use of toxic N-methyl-2-pyrrolidone solvent. Here, a polysaccharide emulsion binder (HBEA) is synthesized by polymerizing and grafting hydrophilic lithiated acrylic acid, 2-hydroxyethyl acrylate, and hydrophobic butyl acrylate onto the backbone of sodium hyaluronate. The amphipathic nature of the synthesized binder enables outstanding affinity to electrode materials, ensuring exceptional adhesion compared to PVDF in various destructive tests. Additionally, the abundant polar groups in HBEA facilitate effective absorption of lithium polysulfides, leading to enhanced sulfur utilization and improved protection of the lithium anode. Furthermore, the presence of lithiated acrylic acid in HBEA leads to a Li+ diffusion coefficient 0.6~1 times larger than that of PVDF in the HBEA binder-based cells. As a result, the high-loading HBEA cell (5 mg cm-2) demonstrates an initial discharge capacity of 3.3 mAh cm-2 at 0.5C and maintains an 87.8% capacity retention after 75 cycles. This work offers an environmentally friendly and easily producible emulsion binder for high-mass-loading sulfur cathodes.
研究领域:
材料科学
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电化学
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电池技术
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Xiaotong Mu,Lihua Chen,Nannan Qu,Min Yin,Shang Wu,Qimeige Hasi,Chaohu Xiao
Solar-powered interface evaporation is considered a promising technology to obtain freshwater from non-potable water by using sustainable solar energy. However, research on combining the photocatalytic effect with solar interfacial evaporation technology to go for photothermal conversion materials with full solar spectrum utilization for photothermal and photodegradation capabilities is still scarce. Due to the unique optical properties of MXene, a novel MXene/Ag 3 PO 4 -based membrane with synergistic photothermal and photocatalytic effects was developed from the perspective of practical applications such as water purification, photodegradation of organic dyes and antibacterial properties. In this paper, polyvinylidene fluoride (PVDF) and carbon black (CB) were used as the substrate, calcium carbonate (CaCO 3 ) and hydrochloric acid (HCl) were selected as the pore-forming agent for hydrophilic modification, and MXene/Ag 3 PO 4 serves as the photocatalyst. The prepared composite polyvinylidene fluoride membrane (PCC-MXene/Ag 3 PO 4 ) with Schottky junction, possesses a rich pore structure, abundant water molecule transport channels, high light absorption ability, and low thermal conductivity, which lead to a good performance in solar interface evaporation, photodegradation and antibacterial. The superhydrophobicity and floatability of the nanosponges in water enable them to continuously pump water, which greatly promotes the dissolution of salt accumulation. With the help of porous nanosponges, PCC-MXene/Ag 3 PO 4 exhibits excellent evaporation stability and salt resistance under 1 kW m −2 solar irradiation, as well as photodegradation of organic dyes. In addition, the PCC-MXene/Ag 3 PO 4 membrane has the properties of self-buoyancy, electrical conductivity, and superior flexibility. Therefore, considering the simple preparation method and fine performances, the PCC-MXene/Ag 3 PO 4 mixed membrane has great application potential in the study of interface evaporation, photodegradation of organic dyes, and antibacterial properties.
研究领域:
材料科学
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环境科学
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纳米技术
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水处理
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光催化
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能量转换
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产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2018
·Vol. 34
·期 6
·1051-1057
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IF 1.248
Dong Yanying,Yu Ping,Sun Qilong,Lu Yang,Tan Zhenjiang,Yu Xiaopeng
Effective molecularly imprinted membranes(MIMs) were developed as an efficient adsorbent for the selective removal of p -hydroxybenzoic acid( p -HB) from acetylsalicylic acid(ASA, aspirin). The MIMs were grafted successfully from poly(vinylidene fluoride) microfiltration membranes via reversible addition-fragmentation chain transfer(RAFT) polymerization. The graft copolymerization of acrylic acid(AA) in the presence of template p -hydroxybenzoic acid led to molecularly imprinted polymer(MIP) film coated membranes. The obtained MIMs were characterized by scanning electron microscopy(SEM), Fourier transform infrared spectrophotometer(FTIR) and Raman spectra, and batch mode adsorption studies were carried out to investigate the specific adsorption equilibrium, kinetics and selective recognition properties of different MIMs. The kinetic properties of the MIMs could be well described by the pseudo-second-order rate equation. Selective permeation experiments were performed to evaluate the permeation selectivity of the p -HB imprinted membranes. The observed performances of the MIMs are applicable to the further purification of aspirin.
研究领域:
材料科学
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化学工程
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环境科学
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药学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2021
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IF 9.028
Dejun Feng,Yuanmiaoliang Chen,Zhangxin Wang,Shihong Lin
Although membrane distillation (MD) has been identified as a promising technology to treat hypersaline wastewaters, its practical applications face two prominent challenges: membrane wetting and fouling. Herein, we report a facile and scalable approach for fabricating a Janus MD membrane comprising a dense polyvinyl alcohol (PVA) surface layer and a hydrophobic polyvinylidene fluoride (PVDF) membrane substrate. By testing the Janus membrane in direct contact MD experiments using feeds containing a sodium dodecyl sulfate (SDS) surfactant or/and mineral oil, we demonstrated that the dense Janus membrane can simultaneously resist wetting and fouling. This method represents the simplest approach to date for fabricating MD membranes with simultaneous wetting and fouling resistance. Importantly, we also unveil the mechanism of wetting resistance by measuring the breakthrough pressure and surfactant permeation (through the PVA layer) and found that wetting resistance imparted by a dense hydrophilic layer is attributable to capillary pressure. This new insight will potentially change the paradigm of fabricating wetting-resistant membranes and enable robust applications of MD and other membrane contactor processes facing challenges of pore wetting or/and membrane fouling.
研究领域:
化学工程
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材料科学
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环境工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Zhao Zhang,Jing Zhou,Teng Hou,Jingying Xu,Yaru Wang,Hao Ye,Bin Yang,Xianglong Li
Superhydrophobic fibrous membranes have been widely investigated to treat oily wastewater originated from oil spills and industrial organic pollutants. However, the applications of these membranes are usually limited by complex preparation process, high modification cost, and poor durability. In this research, we developed a cost-saving approach to construct the fiber with core-sheath structure by using centrifugal spinning, which was based on the viscosity difference of Polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), hyperbranched unsaturated polyester (HBPU). Subsequently, the hydrophobic long chain was attended on fiber surface through the mercaptan click reaction induced by ultraviolet light, which were assisted by the plenty of double bonds supplied by HBPU. Due to the coarse structure and low surface energy of the treated fibers, the fibrous membranes exhibited super hydrophobic properties for the water contact angle high as 156°. The separation capacity for water-in-oil emulsions were up to 7562.24 L·m −2 ·h −1 for the flux and separation efficiency were up to 99.27 %. Additionally, the flux and separation efficiency exhibited no significant changes over 50 cycles. Therefore, we provided a unique and straightforward technique for producing superhydrophobic separation fibrous membranes.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
Materials Advances
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2024
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IF 5.2
Wanting Li,Jing Yang,Xin Gao,Yiqian Fu,Huiyu He,Pu Wang,Yudong Hou,Mankang Zhu,Xiu-Hong Wang
Severe water pollution has posed a great threat to human health and aquatic organisms, leading to serious damage to aquatic ecosystems. Reactive oxygen species is essential in the degradation of water pollutants via a redox reaction. Here we report boosted and controllable generation of reactive oxygen species and subsequent removal of organics through ultrasonic and light-activated photo-piezocatalysis enabled by a nanofiber film. A Ag@BaTiO3 nano hybrid seeded polyvinylidene fluoride (PVDF) composite fiber film with enhanced β phase content was fabricated using electrospinning. The piezoelectric device made of the Ag@BaTiO3/PVDF fiber film displayed enhanced piezoelectric performance, with an open circuit voltage of approximately 6.3 V and a short circuit current of 0.497 μA under 3.39 N pressure. The rate of reactive oxygen species generated via continued ultrasonic irradiation of the heterostructured fiber film is significantly faster than that of the pure PVDF film. The film allows efficient degradation of water pollutants (degradation rate 81%) and removal of microbial species (99% clearance of E. coli) via a concerted route of photo-piezocatalysis. In summary, the use of a heterostructured PVDF nanofiber film is an effective approach to induce an integral electrical field and to piezocatalytically generate aqueous ROS, which is desirable in environmental pollution control.
研究领域:
环境科学
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材料科学
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纳米技术
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水处理
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Shuru Wu,Chengyu Wang,Shuanghui Li,Liming Lin,Qingsong Tong,Mengqi Zhu,Jingzheng Weng
Uneven lithium plating and low ionic conductivity currently impede the realization of high-capacity rechargeable lithium metal batteries. And the conventional poly(ethylene oxide) (PEO) solid-state electrolytes are unsuitable for high-energy-density Li anode applications due to their low lithium-ion transference number and high reactivity with Li metal, leading to detrimental dendrite formation and potentially hazardous exothermic reactions with the electrolyte. In this study, we employ a supramolecular approach to develop a novel polymer solid-state electrolyte based on poly(vinylidene fluoride) (PVDF) and a novel triblock polymer nanomicrosphere, (poly(ε-caprolactone)-poly(ethylene glycol)-poly(ε-caprolactone), (PCL-PEG-PCL). The abundance of carbonyl and ether-oxygen functional groups in PCL-PEG-PCL enhances the lithium coordination environment within the polymer solid-state electrolyte. Additionally, the original C–F moieties of PVDF form hydrogen bonds with C–H and terminal hydroxyl groups in PCL-PEG-PCL, collectively creating a multichannel fast Li+-conducting supramolecular cross-linked network. The resulting electrolyte demonstrates a high ionic conductivity of 1.4 × 10–3 S cm–1 and an extended electrochemical window of 5.2 V. Moreover, the electrolyte exhibits a high lithium-ion transference number (tLi+ = 0.63) at room temperature and exhibits excellent interfacial compatibility with the lithium metal anode. For the resulting electrolyte utilized in LiFePO4 batteries, the capacity retention of the cells assembled with this electrolyte exceeds 91.3% after 1000 cycles at 25 °C and 2 C (0.281 mA cm–2).
研究领域:
材料科学
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电化学
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能源存储
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聚合物化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Ning Liu,Shuguang Bi,Ying Ou,Hai Liu,Yi Zhang,Chunli Gong
Proton exchange membranes with high ionic conductivity and good chemical stability are critical for achieving high power density and long lifespan of direct methanol cells (DMFCs). Herein, a zwitterionic molecule was grafted onto the surface of polyvinylidene fluoride (PVDF) nanofibers to obtain functionalized PVDF porous substrate (SBMA-PDA@PVDF). Then, sulfonated poly(ether ether ketone) (SPEEK) was filled into the pores of SBMA-PDA@PVDF, and further ionic cross-linked via H 2 SO 4 to prepare the composite membrane (SBMA-PDA@PVDF/SPEEK). The basic groups on the zwitterionic interface could not only establish ionic cross-linking with SPEEK to increase chemical stability and reduce swelling, but also serve as the adsorption sites for subsequent H 2 SO 4 cross-linking to significantly enhance proton conductivity. Super-high proton conductivity (165.34 mS cm −1 , 80 °C) was achieved for the membrane, which was 2.12 times higher than that of the pure SPEEK. Moreover, the SBMA-PDA@PVDF/SPEEK membrane exhibited remarkably improved oxidative stability of 91.6 % mass retention after soaking in Fenton’s agent for 12 h, while pure SPEEK completely decomposed. Satisfactorily, the DMFC assembled with SBMA-PDA@PVDF/SPEEK exhibited a peak power density of 99.01 mW cm −2 , which was twice as much as that of commercial Nafion 212 (48.88 mW cm −2 ). After 235 h durability test, only 11 % voltage loss was observed.
研究领域:
材料科学
·
电化学
·
能源材料
·
燃料电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Kang Liu,Li Deng,Tonghui Zhang,Ke Shen,Xuefen Wang
Wearable smart membranes applied in fabrics as a functional core layer, featuring high ultraviolet (UV) resistance, ease of breathability, and desirable waterproof performances, have received much attention. However, using a facile and environmentally friendly process to design such versatile protective materials that have satisfactory comprehensive performances has turned out to be a tremendous challenge and has not yet been reported. Herein, we report a simple and high-efficiency strategy to fabricate waterproof and breathable membranes with outstanding UV-resistant properties by introducing 2-hydroxy-4-methoxybenzophenone (UV9) and hydrophobic nanotitanium dioxide that has been modified with a short-chain fluoroalkylsilane coupling agent (CF3CH2CH2SiCl3, TFPTCS) (named F-TiO2) into a poly(vinylidene fluoride) (PVDF) solution for facile one-step electrospinning. Because of the addition of F-TiO2 NPs, the waterproof properties of the PVDF nanofibrous membranes were dramatically enhanced; meanwhile, F-TiO2 NPs acted as inorganic UV shields to impart durable UV resistance to the PVDF membranes. Additionally, the organic UV absorber UV9 was utilized to further strengthen the UV-resistant property of the PVDF/F-TiO2 membranes. By slightly adjusting the addition amount of F-TiO2 NPs and UV9, ecofriendly and multifunctional PVDF/F-TiO2/UV9 nanofibrous membranes were systemically optimized with good moisture breathability (10.6 kg m–2 d–1) and waterproof performance (60.2 kPa), satisfactory tensile strength (15.1 MPa), and an outstanding ultraviolet protection factor (UPF value reached up to 1690.7). Such versatile materials would be very suitable for the design of wearable textiles for various applications, especially in outdoor protective clothing and health care and military products.
研究领域:
材料科学
·
纺织工程
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纳米技术
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhenji Zhou,Caiyin You,Jizhe Jia,Weimin Xia,Zhong Li,Heguang Liu,Na Tian
Polyvinylidene difluoride (PVDF) and its copolymers are commonly used in triboelectric nanogenerators (TENGs) due to their flexibility and good mechanical–electrical properties. In this study, poly[(vinylidene fluoride)-co-trifluoroethylene] [P(VDF-TrFE)] composites were fabricated by embedding polydopamine (PDA)-coated cobalt ferrite nanorods (RCFO). A stripe-like microstructure was formed by applying a magnetic field during the curing process. The TENG was built with a polytetrafluoroethylene (PTFE) film as the negative friction material. Due to the enhanced micro–nano structure of the P(VDF-TrFE) films, the increased charge transfer occurred between the RCFO@PDA/P(VDF-TrFE) composite film and the PTFE film. Good triboelectric performance was realized, with an open-circuit voltage of 33.20 V, a short-circuit current of 1.20 μA, and a transferred charge of 13.17 nC at a frequency of 5 Hz and a vertical contact force of 15 N. Additionally, a peak power density of 32.5 μW cm −2 was achieved when connected to an external load resistor of 20 MΩ. In practical applications, the TENG could directly illuminate a series of 36 connected light-emitting diodes without the need for capacitors. The device's ability to capture stray magnetic fields was also demonstrated. A wireless transmission-based remote security system was demonstrated as the self-powered sensor in a noncontact mode.
研究领域:
纳米技术
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能量收集
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传感器
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无线通信
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安全系统
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材料科学
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聚合物复合材料
✓ 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）