Advanced Sensor Research
·
2024
·
IF 0
Wei Ye,Yaxin Li,Xinyu Zhao,Yaocheng Yang,Xin Wang,Dongqing He,Lu Li,Dongyan Tang,Tengling Ye
This study introduces a novel fluorescent light-up electrospun membrane, integrating PbBr 2 , which serves as an exceptionally selective probe for the detection of cesium ions (Cs + ). Leveraging the superior optical properties of CsPbBr 3 perovskite nanocrystals (PNCs), the researchers employ electrospinning technology to fabricate a test strip, namely PbBr 2 @polyacrylonitrile (PbBr 2 @PAN) nanofiber membranes, capable of swiftly detecting Cs + in water merely by observing changes in the nanocrystals' luminescence with the naked eye. By the introduction of NH 4 + -modified montmorillonite (NH 4 + -MMT), PbBr 2 -MT@PAN nanofiber membranes is obtained. The selectivity and sensitivity to Cs + can be further improved because NH 4 + -MMT endows PbBr 2 -MT@PAN nanofiber membranes with the hydrophilic property and selective adsorption toward Cs + ions. The membrane's fabrication is simple, scalable, and cost-effective, with high cesium selectivity and sensitivity down to 44 ppb. This innovation enables efficient, on-site cesium monitoring critical for environmental safety and nuclear waste management.
研究领域:
分析化学
·
材料科学
·
环境监测
✓ 已验证
DOI
Polymers
·
2021
·Vol. 13
·期 4
·523
·
IF 4.329
Geng Cheng,Zhen Li,Shan Ren,Dongmei Han,Min Xiao,Shuanjin Wang,Yuezhong Meng
As a key component of direct methanol fuel cells, proton exchange membranes with suitable thickness and robust mechanical properties have attracted increasing attention. On the one hand, a thinner membrane gives a lower internal resistance, which contributes highly to the overall electrochemical performance of the cell, on the other hand, strong mechanical strength is required for the application of proton exchange membranes. In this work, a sulfonated poly (fluorenyl ether ketone) (SPFEK)-impregnated polyimide nanofiber mat composite membrane (PI@SPFEK) was fabricated. The new composite membrane with a thickness of about 55 μm exhibited a tensile strength of 35.1 MPa in a hydrated state, which is about 65.8% higher than that of the pristine SPFEK membrane. The antioxidant stability test in Fenton’s reagent shows that the reinforced membrane affords better oxidation stability than does the pristine SPFEK membrane. Furthermore, the morphology, proton conductivity, methanol permeability, and fuel cell performance were carefully evaluated and discussed.Keywords:electrospun mat;proton exchange membrane;direct methanol fuel cell;composite membrane
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yongxian Wen,Menghan Xu,Yang Hu,Jiangkai Bao,Quanling Yang,Chuanxi Xiong,Zhuqun Shi
Poly(L-lactic acid) (PLLA), a piezoelectric material with excellent biocompatibility, has garnered significant attention due to its wide applications in wearable biosensors. Enhancing its piezoelectric performance has thus become a key research focus. In this study, we fabricated a composite electrospun membrane composed of Poly (L-lactic acid) (PLLA) and tetragonal barium titanate (T-BTO). By the strong stretching of the collector and incorporating the piezoelectric phase of T-BTO, the PLLA/submicron- sized T-BTO composite membranes generated an open-circuit voltage of 1.03 V and a short-circuit current of 33.5 nA. The submicron-sized T-BTO demonstrated significantly better dispersion and performance enhancement compared to the micron-sized T-BTO. Furthermore, flexible devices based on these membranes demonstrated sensitivity to joint movement, producing corresponding electrical signals. These findings suggest that PLLA/T-BTO electrospun fiber membranes hold great potential as flexible, sensitive piezoelectric materials for bio-sensing applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2016
·Vol. 52
·期 5
·2473-2483
·
IF 2.302
Zhu Lixia,Dai Jinyue,Chen Lai,Chen Jing,Na Haining,Zhu Jin
By covalently immobilizing imidazolium ion onto molecular chain, functional polyurethane (PU) is fabricated and thus an effective way is initiated to prepare electrospun membranes with antibacterial activity. In the experiment, PUs containing imidazolium ion side group (Bmim-PUs) are synthesized through a two-step polymerization process. It includes prepolymerization of isophorone diisocyanate (IPDI) with polyester glycol and chain extension polymerization using imidazolium-based ionic diol (Bmim-OH). Then, the obtained Bmim-PUs are electrospun into fibrous membranes with a diameter of ~640 nm. After a careful assessment, antibacterial activities of electrospun membranes against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli are clearly exhibited. The antibacterial efficiency of Bmim-PUs on both bacteria species improves by 60% in comparison with PU without imidazolium ion. This research suggests a simple but effective methodology to design and fabricate ultrafine fibrous membrane with significant antibacterial activity. Moreover, the obtained fibrous membranes have widely potential applications in protective textiles, filtration, and biomedical engineering.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 3
·036416
·
IF 1.151
Yating Wang,Xiu Dai,Xu Li,Xinlong Wang
In this article, metal organic frameworks (MOFs) material is introduced in the poly (lactic acid) (PLA) by electrospinning to fabricate the nanocomposite membrane. The acrylic acid (AA) is grafted onto the membrane under UV light. The prepared membrane is studied by scanning electron microscopy (SEM), x-ray diffraction (XRD), thermogravimetry (TG), contact angle test and tensile strength test. The SEM image and XRD indicate that nano MOFs particles adhere to the membrane. Contact angle test shows that grafting AA on the composite fiber membrane improves its hydrophilicity effectively. TG analyses show that the particulate matter (PM) capture capacity of PLA membrane with 2 wt% ZIF-8 content is 22%, which rises to 37% after grafting.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2018
·Vol. 1
·期 1
·389-394
·
IF 0
Linlin Zang,Ru Lin,Tianwei Dou,Lu wang,Jun Ma,Liguo Sun
Nanofibrous membranes have a high specific surface area and large porosity, which are beneficial for being used as adsorbents to remove heavy metal ions from water. In this work, electrospun nanofibers were wrapped with a hydrogel layer with a tunable thickness, which endowed the membrane with excellent superhydrophilic performance. Because of good water-retention properties and abundant functional groups originating from the hydrogel layer, as a static adsorbent, the maximum adsorption capacity of Pb(II) was up to 146.21 mg g−1 according to the Langmuir model. Meanwhile, the electrospun membrane also possessed water permeability as a flow-through membrane for dynamic adsorption, which was obviously different from traditional hydrogel adsorbents. As a result, the rejection ratio of Pb(II) can remain over 55% after running for 72 h under high pH conditions and at low initial ion concentrations. Apart from these, cycle operations confirmed the regeneration of the membrane, and competitive adsorption experiments illustrated the selective removal of Pb(II) in a mixed ion solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Quan Shen,Yue Jiang,Shanzhu Guo,Lin Huang,Haibo Xie,Long Li
Gradual-transition wettability gradient is a highly promising wettability profile for driving fluid directionally transport across the thickness of porous membranes. However, the fabrication of such membranes is still challenging, limiting their further application in various fields. Here, we report a one-step strategy to fabricate membranes with gradual-transition wettability gradient (GMs) by programmed in-line-blending electrospinning polymers (poly (ε-caprolactone) (PCL) and poly (ε-caprolactone-co-ethylene glycol) (PCE)) with compatible segments but obviously different wettabilities. The results demonstrate that two opposite gradual-transition wettability gradients across the thickness are successfully fabricated in GMs, and resulting GMs exhibit excellent directional liquid transport property that can only allow liquid drops and continuous flow to permeate across the thickness in the direction from the lyophobicity-rich side to the lyophilicity-rich side while blocking the permeation process in the reverse direction. Additionally, no matter under high or low gravity conditions, the directional fluid transport flux of membranes with different wettability profiles improves as the gradient layers increase from 3 to 78, corresponding to the transition of wettability profile from 3-layered Janus wettability to 78-layered gradual-transition wettability. As a result, GMs achieve much faster directional fluid transport fluxes than membranes with abrupt-change wettability gradient (AMs) and homogeneous wettability, owing to the acceleration of internal driving forces originating from the gradual-transition wettability gradient. Based on this particular property, GMs also show great potentials in ultrafast directional floating oil collection and energy-saving directional separation of oil/water mixtures, offering new insight for designing and fabricating wettability-anisotropic porous membranes with potential and versatility in multiple applications.
研究领域:
材料科学
·
表面化学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2017
·
IF 5.527
Jingcheng Cai,Xiaohua Liu,Yiming Zhao,Fei Guo
Polyacrylonitrile (PAN) solution was electrospun into fibrous membranes with nonwoven structure and quasi-parallel fibrous structure using a rotating drum collector. Surface fluorination treatment technique was applied to transform the intrinsically hydrophilic PAN membranes into hydrophobic membranes. A set of surface fluorination treated electrospun PAN membranes were tested for membrane desalination (MD) using a lab-scale air gap membrane desalination system . The results show that it is promising to use intrinsically non-hydrophobic membranes in MD after surface fluorination modification based on permeate flux and salt rejection ratio. In the MD application , we found that the fiber orientation combing with the flow direction of the feed could affect the mass transfer performance. The quasi-parallel fiber alignment , surface fluorination treatment, liquid entry pressure , permeate flux, and mass transfer coefficient were studied in detail in this work.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2017
·Vol. 303
·期 2
·1700395
·
IF 2.863
Hui-Hui Cheng,Jiang Xiong,Zhi-Ning Xie,Ya-Ting Zhu,Yu-Man Liu,Zhong-Yin Wu,Jian Yu,Zhao-Xia Guo
Poly(butylene succinate) (PBS) and gelatin-coated PBS electrospun membranes are evaluated for use as support materials to immobilize thrombin, an effective hemostat for topical injury, and three methods differing in whether and when gelatin is included are envisaged to prepare thrombin-loaded PBS-based electrospun membranes for use as rapid hemostatic materials. Both PBS and gelatin-coated PBS membranes have high porosity, excellent wettability, rapid water penetration rate, and high water uptake, and thus are suitable support materials for thrombin. The thrombin immobilized onto gelatin-coated PBS membrane has both high initial enzyme activity and high storage stability ascribed to the stabilizing effect of gelatin on thrombin activity. The hemostasis performance of thrombin-immobilized membrane is evaluated in a rat liver model, showing shorter hemostasis time and less blood loss than clinically used gelatin sponge. The hemostasis mechanism is attributed to combined effects of thrombin and porous structure of electrospun membrane.
研究领域:
生物材料学
·
组织工程
·
纳米医学
·
止血学
·
药物递送系统
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2025
·
IF 5.8
Bo Li,Tianchi Tang,Mengyue Jiang,Hui Chen,Yanhong Bai
Sustained-release nanofilms incorporated with oregano essential oil (OEO) were developed by emulsion electrospinning using polyvinyl alcohol (PVA) and quaternary-ammonium chitosan (QAC). The SEM, FTIR and XRD results showed that OEO was successfully encapsulated in the PVA/QAC nanofiber with a diameter range of 158.0–179.6 nm. The incorporation of OEO significantly enhanced the mechanical and barrier properties of PVA/QAC nanofilm, concomitantly mitigating its hydrophilic nature. The prepared PVA/QAC-OEO nanofilms demonstrated excellent antioxidant properties and antimicrobial activities against S. aureus and E. coli (the maximum inhibition zones achieving 23.13 ± 0.72 mm). The release kinetics results showed sustained release of OEO from the PVA/QAC nanofilms, and the release kinetics of OEO adhered to the Fickian + First order dynamics model (R 2 = 0.9570–0.9997), indicating that a combination of random diffusion and polymer structural relaxation influenced the release of OEO. Furthermore, preservation research showed that the PVA/QAC-OEO nanofilms significantly inhibited the rise in pH, total volatile base nitrogen (TVB-N), thiobarbituric acid reactive substances (TBARs), and total viable count (TVC) in chicken breasts stored at 4 °C, while also maintaining their color and texture properties. Particularly, chicken breasts wrapped in PVA/QAC-OEO 3 film exhibited an extended shelf life for 4 days. Therefore, the PVA/QAC-OEO nanofilms could be a prospective packaging material for meat preservation.
研究领域:
食品包装
·
纳米技术
·
食品科学
·
材料科学
·
抗菌技术
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Xuan Zhou,Wenxin Chen,Zhixuan Zhao,Shuqiang Peng,Lixin Wu,Zixiang Weng
Electrospun membranes have been extensively employed as radiative cooling membranes for thermal management in personal and architectural applications, owing to their facile processability and tunable structural configurations. However, intrinsic limitations such as narrow fiber size distribution, inherent hydrophobicity, and insufficient multifunctionality lead to challenges, including inadequate solar spectral coverage, low reflectivity, constrained moisture transport capacity, and absence of dynamic regulation. In this study, a bifurcated electrospun membrane with a broad fiber size distribution is fabricated via a jet splitting approach, providing a wider coverage of the solar spectrum. Inspired by vascular plant transpiration, bioinspired gradient wettability and porous structures are engineered, significantly enhancing moisture evaporation efficiency. Additionally, phase-change microcapsules (PCMs) with a loading capacity of up to 70 wt.% are successfully integrated into the fibers through a combined electrospinning-spraying technique, demonstrating a phase change enthalpy (Δ H m ) of 111.8 J g −1 . The optimized membrane exhibits 94.0% solar reflectance with a 0.2 mm thickness only while delivering 93.6 W m −2 radiative cooling power and 392.5 W m −2 evaporative cooling power, enabling a reduction of 5.7–17.4 °C skin temperature. The material integrates broad-spectrum coverage, high reflectivity, efficient evaporation, and substantial phase-change enthalpy in a low thickness, exhibiting great potential for personal thermal management and building energy efficiency applications.
研究领域:
材料科学
·
纳米技术
·
热工学
·
仿生学
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Yingfei Hui,Hao Guo,Rui Xue,Mingyue Wang,Yanyan Ma,Dengke Zhuang,Wu Yang
The extensive application of glyphosate (Gly) presents significant environmental and health risks, underscoring the necessity for advanced sensors to monitor Gly levels. In this study, a novel ratiometric fluorescent sensor (Eu-TTA@COOH-COF) was developed by coordinating Eu³ ⁺ ions with carboxylated covalent organic frameworks (COOH-COF) and grafting 2-thenoyltrifluoroacetone (TTA) ligand to enhance Eu³ ⁺ sensitization. Gly detection relied on its energy competition with the COF, which quenched the characteristic red emission of Eu³ ⁺ (613 nm), and electron transfer to the COOH-COF matrix amplifying the intrinsic blue fluorescence emission (435 nm) of the COF. This dual-signal response enabled precise Gly quantification with a detection limit of 0.049 μM. In addition, a hydrophobic electrospun film (Eu-TTA@COOH-COF@PVDF) with excellent luminescent property was prepared by encapsulating the Eu-TTA@COOH-COF fluorescent probe within a polyvinylidene fluoride (PVDF) matrix. Gly exposure triggered a concentration-dependent fluorescence shift from red to blue, which can be quantified using an RGB recognition applet in smartphones. This thin-film sensing device provides valuable insights for developing intelligent portable sensing platforms to enable on-site detection of pesticide residues.
研究领域:
分析化学
·
材料科学
·
环境监测
·
荧光传感
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）