Foods
·
2023
·Vol. 13
·期 1
·132
·
IF 5.2
Xiangzheng Yang,Jingshan Rao,Chaoyi Shen,Huan Lian,Da Wang,Di Wu,Kunsong Chen
The preparation of active packaging loaded with antimicrobial, antioxidant, and other functional agents has become a hot topic for food preservation in recent years. In this field, active fiber films based on spinning methods have attracted the interest of researchers owing to their high specific surface area, high porosity, high loading capacity, and good controlled release capacity. In the present work, neatly arranged ethyl cellulose (EC)/polyvinyl-pyrrolidone (PVP) fibrous films loaded with natamycin as an antimicrobial agent were prepared by microfluidic spinning. The encapsulation efficiency of natamycin was more than 90% in each group and the loading increased with increasing natamycin content. According to the characterization results of the natamycin-loaded EC/PVP fibrous films, hydrogen bonding was formed between natamycin and EC and PVP in the fibrous films. Meanwhile, the water contact angle of the fibrous films was increased, suggesting the improved hydrophobicity of the films. In the in vitro bacterial inhibition experiments, the active fiber films loaded with natamycin showed good antimicrobial activity, which could significantly inhibit the growth of gray mold. In conclusion, N-EC/PVP fibrous films with antimicrobial activity prepared by microfluidic spinning showed good potential in the field of active packaging.
研究领域:
食品科学
·
材料科学
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DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 45
·25313-25318
·
IF 2.936
Lei Peng,Manjun Zhang,Musong Lin,Qiang Fu
The insulating materials used in power cables are susceptible to damage and cracks during installation and operation. To solve this problem, we have prepared a self-healing material PVP/p(HEMA-co-BA), which is synthesized by radical polymerization using HEMA, BA, PVP and a host–guest assembly. The host–guest assembly is constructed through interactions between host and guest molecules (CD–Al2O3 NPs act as the host, and HEMA–Ad acts as the guest). The characterization results of the materials show that there are two kinds of supramolecular interactions, namely, the host–guest interaction and the hydrogen bonding. The material possesses good thermal stability (heat-resisting temperature can reach 200 °C) and good electrical performance. The storage modulus of the material can be increased up to 432 MPa using a cross-linking agent at 20 °C. Furthermore, the material exhibits self-healing property, and it can self-heal several times; its self-healing efficiency is relative to the dosage of the cross-linking agent.
研究领域:
材料科学
·
电气工程
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Sixing Chen,Yi Liu,Yanwei Sun,Guoliang Xu,Taotao Ji,Xiongfu Zhang,Fei Wang,Yi Liu
Concurrent manipulation of orientation and thickness of MOF membranes has become a reliable approach for improving their separation performances. In terms of oriented seeded growth, oriented deposition of MOF nanosheets during seeding process and sealing all intergranular gaps with no discernible increase in membrane thickness during secondary growth have become indispensable. In this study, we pioneered the fabrication of uniform hexagonal-shaped, 20–40 nm thick MIL-96 nanosheets through solvent composition optimization (V H2O /V FA = 1/2). Subsequently, spin coating was employed for c -oriented deposition of uniform MIL-96 seed layer, during which the addition of PVP in the suspension was found to be critical for obtaining qualified seed layer. Finally, well-intergrown, highly c -oriented ultrathin MIL-96 membrane was prepared upon employing NMF as the solvent during secondary growth. Gas permeation results implied that prepared MIL-96 membrane exhibited superior gas separation performance compared with that of a -& b -oriented counterpart.
研究领域:
材料科学
·
化学工程
·
膜技术
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DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2025
·
IF 5.5
Hermela Feysa,Mengdi Xu,Charles Kumah,Biruk Fentahun Adamu,Esubalew Kasaw Gebeyehu,Mazen Khaled Alsahari,Hua Shen,Guangbiao Xu
Chronic wounds in diabetic and immunocompromised patients often remain inflamed due to infection and high levels of pro-inflammatory cytokines. Effective dressings require biocompatibility and active functions to promote healing and reduce inflammation. Conventional dressings lack bioactive agents, cell compatibility, and sustained therapeutic release properties. This study developed dual-functional wound mats by combining molecular docking and electrospinning to load Rumex abyssinicus (RA) extracts into poly(vinyl alcohol)-polyvinylpyrrolidone (PVA–PVP) nanofibers. Molecular docking revealed that γ-sitosterol strongly binds to tumor necrosis factor-alpha (TNF-α) (−11.6 kcal/mol) and transforming growth factor beta-1 (TGF-βR I) (−11.2 kcal/mol), while phytol and linolenic acid derivatives showed moderate interactions with inflammatory and microbial targets. These compounds met the drug-likeness and absorption, distribution, metabolism, excretion, and toxicity (ADMET) criteria. The RA-loaded nanofibers (180–450 nm) were uniform and bead-free, as confirmed by Fourier-transform infrared spectroscopy and X-ray diffraction. The mats exhibited moderate hydrophilicity (contact angle 65°–70°), controlled biodegradability over 14 days, and optimal water vapor transmission rates (1450–1650 g/m2/day) for moist healing. RA release was sustained, reaching 80% at 72 h. The mats exhibited concentration-dependent antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) and high cytocompatibility (105.6–116.5%). In vivo, RA mats accelerated wound closure to 97% by Day 15, enhanced collagen deposition (75%), reduced inflammation (18%), and suppressed TNF-α and interleukin-6 (IL-6) by up to 85 and 95%, respectively. By integration of phytochemicals from renewable plant sources with water-soluble and biocompatible polymers, this study contributes to the development of sustainable wound-care materials. RA-based nanofibers are promising multifunctional wound-dressing materials.
研究领域:
生物医学工程
·
植物药学
·
纳米技术
·
伤口护理
·
高分子科学
·
计算机辅助药理学
·
可持续材料
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DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 102
·83953-83959
·
IF 3.84
Lichao Ding,Aibo Zhang,Honglong Lu,Yanping Zhang,Yaping Zheng
An absorber hybrid was fabricated by the incorporation of PVP treated multi-walled carbon nanotubes (PVP@MWNTs) and graphene nanoplatelets (GNPs) using an ultrasonication filtration method. The microwave absorbing properties of PVP@MWNTs/GNPs hybrids were investigated in the frequency range of 8.2–12.4 GHz. The structure and morphology of the PVP@MWNTs/GNPs hybrids was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. The SEM and TEM results showed that GNPs were covered by PVP@MWNTs; the embedding of PVP@MWNTs into GNPs layers endows PVP@MWNTs/GNPs hybrids with optimum dispersion, which is helpful to the significant improvement in electron transfer effectiveness. The PVP@MWNTs/GNPs hybrids reveal excellent microwave absorbing properties. The maximum reflection loss value (RL) of PVP@MWNTs/GNPs is −26.5 dB at 11.29 GHz with a thickness of 2 mm, and the effective absorption (<−10 dB) bandwidth reaches 1.6 GHz. However, the RL of pristine MWNTs is about −5 dB at 12 GHz, and GNPs is −4.43 dB at 12.23 GHz. The results indicate that the combination of PVP@MWNTs and GNPs have a synergetic effect on the improved microwave absorbing properties.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Pengfei Li,Qi Yuan,Qingqing Wang,Diwu Jiang,Zhongqing Su,Chao Xu
Ultrasonic response of conductive nanocomposites is analysed through modelling. • Resistance variations reveal distinct wave modes matching experiments. • Tunnelling junctions near the cut-off distance are most responsive. • This work aims to contribute to sensor development for ultrasound measurement. Conductive nanocomposites exhibit piezoresistivity, enabling their application as sensors for ultrasound measurement. This piezoresistive behaviour originates from nanofiller-formed conductive networks, which evolve under external excitations. Despite this experimentally demonstrated functionality, the mechanism governing the dynamic response of these networks to ultrasonic excitation remains largely unexplored. This work provides mechanistic insights into ultrasound measurement using a carbon black nanoparticle (CBNP)-filled polyvinylpyrrolidone nanocomposite sensor through combined modelling and experimental validation. Using the experimentally measured density and mechanical properties, wave propagation is simulated to calculate the sensor’s nodal displacements induced by guided ultrasonic waves, which dynamically update CBNP distributions within representative volume elements, thereby leading to the evolution of conductive networks. Tunnelling junctions between CBNPs are modelled as resistors to compute the equivalent resistance of the conductive networks over time. The resulting time-dependent resistance variations reveal distinct zero-order symmetric and anti-symmetric waves that closely match the experimentally measured voltage signal. Further analysis of resistance variations in tunnelling junctions with different interparticle distances highlights the critical role of electron tunnelling in the ultrasonic response, showing that junctions near the tunnelling cutoff distance are more sensitive to small distance changes. In summary, this work elucidates the ultrasonic response mechanism of conductive nanocomposites, providing guidance for sensor development. Download: Download high-res image (186KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2026
·Vol. 34
·期 8
·206
·
IF 5.6
Yang Xiaoyu,Yu Yunwu,Zhou Hailong,Xu Qicheng,Sun Xiaowei,Wang Yan,Liu Peng,Li Ting,Liu Xin,Gao Lili
In this study, an innovative multi-scale research framework integrating molecular dynamics (MD) simulations, machine learning (ML) prediction, and experimental validation was established to systematically elucidate the mechanism by which polyvinylpyrrolidone (PVP) regulates the performance and structure-property relationship of phenolphthalein-based polyether ether ketone/polyethyleneimine (PEEKWC/PEI) ultrafiltration membranes. MD simulations further revealed at the atomic scale that PVP forms a hydrogen-bonding network with the membrane matrix via the carbonyl oxygen of the pyrrolidone ring, thereby significantly enhancing interfacial compatibility. Its flexible chain intercalation can increase the free volume of the membrane. However, excessive addition induces local aggregation and entanglement of molecular chains, hindering water molecule diffusion, resulting in a decrease in diffusion coefficient from 0.115 Ų/ps to 0.082 Ų/ps. The ML model accurately reproduced the decreasing trend of water flux with the increase of PVP content. Combined with SHAP analysis to quantify the influence weight of each factor, it was clarified that operating pressure and surface roughness are the dominant factors, and the global optimal PVP addition amount was identified. Experimental validation showed that the PVP-K90 modified membrane exhibits the best comprehensive performance, with a pure water flux of up to 3162.1 L·m -2 ·h -1 , a Congo Red (CR) rejection rate of 95.3%, and a flux recovery rate (FRR) of 88.9%, demonstrating excellent antifouling performance. The PVP-K120 modified membrane shows better dye rejection effect in high-salt environments, with a rejection rate exceeding 87%. This study moves beyond the traditional trial-and-error approach, reveals the microscopic essence of additive effects through multi-scale correlation analysis, not only successfully prepares high-performance ultrafiltration membranes, but also provides a replicable innovative research paradigm for the directed design and performance optimization of separation membranes.
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高影响因子
Small
·
2024
·
IF 13
Lin Zhang,Hongjing Shang,Qi Zou,Changping Feng,Hongwei Gu,Fazhu Ding
Flexible polymer/single-wall carbon nanotube (SWCNT) composites are a vital component for wearable/portable electronics, but the development of their n-type counterpart is laggard. Furthermore, little attention is paid to the interaction between SWCNT and polymers, especially the unconjugated polymers, as well as the conversion mechanism of conduction characteristics. Here, the n-type flexible SWCNTs/Polyvinyl Pyrrolidone (PVP) films are successfully fabricated, where the oxygen atoms in PVP interacted with SWCNT via hydrogen bonds, which can lower the energy barrier of electron tunneling, providing the pathway for the electron transfer. Furthermore, with the increasing synthesis temperature, the hydrogen bonds strengthened and the thermal activation energy further improved, both of which enhanced the electron-donating ability of PVP, resulting in a high-power-factor value of 260 µW m −1 K −2 . Based on the optimized SWCNTs/PVP films, a thermoelectric module is assembled, which achieved a power density of 400 µW cm −2 at a temperature difference of 56 K, coupled with excellent flexibility, showing a less than 1% variation of resistance after 5000 bending cycles. It shows the highest output-performance and the best flexibility among the reported SWCNT-based thermoelectric modules. This work provides significant insights into the interaction mechanism and performance optimization of hybrid thermoelectric composites, based on SWCNTs/unconjugated polymers.
研究领域:
材料科学
·
纳米技术
·
能源材料
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Lei Wang,Zhaojin Lu,Zhiwen Wang,Longyao Pei,Zhiwei Pang,Jihao Qi,Xin Chen,Jin Sha,Zhishan Bai
Impurities such as residual metal catalysts and amorphous carbon in pristine multi-walled carbon nanotubes (MWCNTs) hinder their dispersibility and conductivity in aqueous media, thereby limiting their application in conductive hydrogels. Here, we report a polyvinylpyrrolidone (PVP)-assisted Fenton method for efficient removal of impurities, and systematically investigate the influence of PVP doping on surface characteristics and dispersion stability in water. Optimal purification, achieved with 10wt% PVP, establishes a stable non-covalent coating that effectively eliminates impurities and markedly improves aqueous dispersibility. Incorporating 0.3wt% of these purified MWCNTs into a Polyacrylamide-Poly (2-acrylamido-2-methylpropanesulfonic acid)/Poly(3,4-ethylenedioxythiophene)/Poly(styrenesulfonate) conductive hydrogel matrix yields a material with significantly enhanced performance: tensile strength (151.81kPa), elongation at break (1595%), toughness (1.73MJ/m³), and compressive strength (254.3kPa) are increased by 11.58% compared to pristine MWCNT-containing hydrogels, while electrical conductivity reaches 2.85 S/m, representing a 13% improvement. This PVP-assisted Fenton purification strategy substantially enhances the functional performance of MWCNTs, enabling the development of high-performance conductive hydrogels with strong potential for flexible strain-sensing applications.
研究领域:
材料科学
·
纳米技术
·
高分子化学
·
生物医学工程
·
柔性电子器件
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产品关联
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2018
·Vol. 35
·期 7
·1570-1576
·
IF 2.199
Dai Yu,Zhu Xiaojun
This work systematically investigates the effect of modifier polyvinylpyrrolidone (PVP) on the microstructure, dielectric and energy storage properties of BaTiO 3 /PVDF composites. The results demonstrate that the BaTiO 3 nanoparticles modified by PVP are uniformly dispersed in the composites, and the defects including cracks and voids are obviously decreased in contrast to the composites with unmodified BaTiO 3 nanoparticles. Due to the enhanced interfacial polarization, the composites with BaTiO 3 @PVP show improved dielectric properties compared with the composites with unmodified BaTiO 3 nanoparticles. For instance, at 1 kHz, the dielectric constant and dielectric loss of the composite with 50 vol% of BaTiO 3 @PVP nanoparticles are 80.4 and 0.085, while of which the BaTiO 3 /PVDF are 35 and 0.265, respectively. The discharge energy density of the composites is largely improved with PVP engineered BaTiO 3 nanoparticles. The composite with 30 vol% BaTiO 3 @PVP achieves a discharged energy density of 4.06 J/cc at 240 kV/mm, which is 116% larger than that of pure PVDF (1.88 J/cc). This research provides an effect modifier to prepare high performance dielectric materials.
研究领域:
材料科学
·
电气工程
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产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2020
·Vol. 10
·期 2
·596
·
IF 2.474
Fubao Zhang,Chen Yang,Xiao-Xiong Wang,Ru Li,Zhong Wan,Xianming Wang,Yong Wan,Yun-Ze Long,Zhongyu Cai
We report the fabrication of polyvinylidene fluoride (tetrabutyl titanate)/polyvinyl pyrrolidone ((tetrabutyl titanate))-graphene quantum dots [PVDF(TBT)/PVP(TBT)-GQDs] film photocatalyst with enhanced photocatalytic performance. The polyvinylidene fluoride (tetrabutyl titanate)/polyvinyl pyrrolidone ((tetrabutyl titanate)) [PVDF(TBT)/PVP(TBT)] film was first prepared with a dual-electrospinning method and then followed by attaching graphene quantum dots (GQDs) to the surface of the composite film through a hydrothermal method. Later, part of the PVP in the composite film was dissolved by a hydrothermal method. As a result, a PVDF(TBT)/PVP(TBT)-GQDs film photocatalyst with a larger specific surface area was achieved. The photocatalytic degradation behavior of the PVDF(TBT)/PVP(TBT)-GQDs film photocatalyst was examined by using Rhodamine B as the target contaminant. The PVDF(TBT)/PVP(TBT)-GQDs photocatalyst showed a higher photocatalytic efficiency than PVDF(TBT)-H2O, PVDF(TBT)/PVP(TBT)-H2O, and PVDF(TBT)-GQDs, respectively. The enhanced photocatalytic efficiency can be attributed to the broader optical response range of the PVDF(TBT)/PVP(TBT)-GQDs photocatalyst, which makes it useful as an effective photocatalyst under white light irradiation.Keywords:electrospinning;nanofiber film;tetrabutyl titanate composites;graphene quantum dots;visible light photocatalysis
研究领域:
材料科学
·
纳米技术
·
环境科学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Jingshan Rao,Chaoyi Shen,Zhichao Yang,Olaniyi Amos Fawole,Jiangkuo Li,Di Wu,Kunsong Chen
Much attention and endeavor have been paid to developing biocompatible food packaging films. Here, ethyl cellulose (EC) and polyvinylpyrrolidone (PVP) were fabricated into films through a facile method, microfluidic spinning. Morphology observations showed that the fibers were neatly arranged with an average diameter of 1–4 μm. FTIR and X-ray diffraction analysis suggested the existence of good compatibility and interaction between EC and PVP. Thermogravimetric analysis demonstrated that PVP ameliorates the thermal properties; moreover, the tensile properties were improved, with tensile strength (TS) and Young's modulus up to 11.10 ± 1.04 MPa and 350.16 ± 45.46 MPa, respectively. The optimal formula was EC/PVP (2:3), of which the film displayed an enhanced TS of 4.61 ± 1.15 MPa and a modified water contact angle of 61.8 ± 4.4°, showing fine tensile and hydrophilic performance. This study provides a facile and green film fabrication method promising to be used for food wrapping.
研究领域:
食品科学
·
材料科学
·
生物医学工程
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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）