INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Muzammal Hussain,Mulenga Kalulu,Zaheer Ahmad,Onome Ejeromedoghene,Guodong Fu
Ethyl cellulose (EC), polyvinylpyrrolidone (PVP), and phosphomolybdic acid (PMoA) were the components of a new photochromic hybrid film composed of heteropoly acids (abbreviated EC-PVP/PMoA), created by solvent evaporation. The EC-PVP/PMoA mechanism, visible light photochromic behaviors, and microstructure were closely studied by transmission electron microscopy (TEM), atomic force microscopy (AFM), ultraviolet-visible (UV–visible) spectroscopy, X-ray photo electronics (XPS), and Fourier transmission infrared spectroscopy (FTIR). FTIR spectra show that neither the core structures of EC, PVP, nor the Keggin structure of PMoA in the EC-PVP/PMoA composite hybrid film were damaged during fabrication. In the presence of oxygen, the yellowish transparent hybrid film exhibited reversible photochromism and significant photochromic reactivity, becoming blue in the presence of visible light. Upon heating the film at 90 °C for 1 h its photoresponsive properties were enhanced, making the blue color more vibrant and stable due to polyethylene glycol (PEG). The XPS spectra demonstrated a proton transfer procedure during the photochromic process, and the presence of Mo +5 species indicated a photoreduction interaction between the PMoA particles and the EC-PVP matrix. To the best of our knowledge, this is the first EC-PVP combined hybrid film with POMs with promising prospects for solar UV detection and smart glass windows applications.
研究领域:
材料科学
·
光化学
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Haodong Hu,Liuyue Xiao,Yun Li,Yanjing Yang,Shian Zhong
Conventional hemodialysis membranes suffer from limited toxin adsorption capacity and poor biocompatibility. This study proposes a novel strategy to fabricate high-performance composite membranes by incorporating polyvinylpyrrolidone (PVP)-modified Zr-melamine metal-organic frameworks (MOFs) into a polyvinylidene fluoride (PVDF) matrix. PVP acts as a crucial mediator, mitigating MOF agglomeration via steric hindrance and optimizing the membrane's pore structure for enhanced mass transfer. Comprehensive evaluations revealed that the membrane with an optimal PVP dosage (M3) achieved superior simulated hemodialysis performance, with clearance rates of 94.36% for creatinine and 86.37% for urea, significantly outperforming commercial equivalents. Furthermore, the M3 membrane demonstrated robust antifouling properties (stable water flux > 98 L/(m²·h) after 5 cycles), high bovine serum albumin (BSA) retention (98.01%), and excellent biosafety profiles, including low hemolysis (∼13.35%) and negligible Zr/melamine leaching. This work elucidates the structure-performance relationship of PVP-mediated MOF/polymer composites, offering a promising, biocompatible candidate for advanced uremic toxin clearance and long-term hemodialysis therapy.
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JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 3.6
Ying Wang,Haoyou Jiang,Botian Zhu,Hualin Zhang,Mengmeng Zhao,Yeheng Cao,Fuming Wang,Xuyang Feng,Junru Wang
Wound ulceration induces inflammation, delays tissue repair, and may trigger systemic infections, thereby endangering bodily health. Hydrogel films are capable of accelerating wound healing processes. This study fabricated polyvinylpyrrolidone/polycaprolactone (PVP/PCL) nanofiber-hydrogel membranes via juxtaposed electrospinning, overcoming the limitations of traditional electrospinning techniques. Hydrophilic PVP (15% w/v in ethanol with 0.03% DAS) and hydrophobic PCL (15% w/v in chloroform/ N , N -dimethylformamide (CF/DMF) 4:1) were employed, with PVP/PCL ratios precisely regulated. The optimal VC-8/2 (PVP/PCL = 8:2) exhibited excellent performance, featuring a viscosity of 176.5 cp, a smooth, bead-free morphology prior to swelling (diameter: 718.22 ± 142.96 nm), and a twisted structure post-swelling (diameter: 268.71 ± 94.21 nm)—all enabled by optimized solvents and juxtaposed electrospinning that eliminated phase separation. Additionally, the VC-8/2 demonstrated a tensile strength of 1.16 ± 0.10 MPa, an elongation at break of 94.35% ± 5.64%, and a 40% water absorption rate after 12 h. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) confirmed the successful cross-linking of PVP, while CCK-8 assays revealed high L929 cell viability (87.23%–91.44%), exceeding the 85% non-cytotoxic threshold. These biocompatible membranes integrate the exudate absorption capacity of PVP and the mechanical support of PCL, rendering them highly promising for advanced wound dressing applications. Graphical Wound ulceration endangers health by inducing inflammation, delaying tissue repair, and triggering systemic infections, while hydrogel films accelerate wound healing. This study fabricated polyvinylpyrrolidone/polycaprolactone (PVP/PCL) nanofiber-hydrogel membranes via juxtaposed electrospinning (overcoming traditional electrospinning limitations) using hydrophilic PVP (15% w/v in ethanol with 0.03% DAS) and hydrophobic PCL (15% w/v in CF/DMF 4:1). The optimal VC-8/2 (PVP/PCL = 8:2) showed a smooth pre-swelling morphology (718.22 ± 142.96 nm) and twisted post-swelling structure (268.71 ± 94.21 nm), with 1.16 ± 0.10 MPa tensile strength, 94.35% ± 5.64% elongation at break, 40% 12-h water absorption, successful PVP cross-linking (ATR-FTIR), and high L929 cell viability (87.23%–91.44%). Integrating PVP's exudate absorption and PCL's mechanical support, the membranes are promising for advanced wound dressings.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Ming Cao,Fan Xiao,Zijian Yang,Yingbo Chen,Ligang Lin
Oil-containing emulsion pollution seriously endangers the ecological environment and human health, and it is urgent to solve the problem of oil-containing emulsion pollution. In membrane separation technology, metal organic frameworks (MOFs) are being widely used to enhance the wettability of the membrane surface and separation efficiency. Here, electrospinning technics and the outstanding wetting properties of MOF are combined to improve the separation performance of oil-containing emulsions. PVP chains were successfully grafted on Zr-O clusters of UiO-66-NH 2 to prepare PVP-UiO-66-NH 2 nanoparticles, which were then loaded on the PAN nanofiber substrate with microspheres/fine fibers prepared by a continuous electrospinning-electrospray process. The result shows that the PAN nanofiber substrate loaded with 0.5 wt% PVP-UiO-66-NH 2 has the best separation efficiency and stable anti-fouling ability for different kinds of oil-in-water surfactant stabilized emulsions (TOC = 11.6 mg/L, R = 99.2% FRR = 94.4% for n-hexane-water emulsion). Therefore, the constructed nanofiber membrane is the favorable candidate for the efficient separation of oil-containing emulsions.
研究领域:
环境科学技术
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材料科学
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膜分离技术
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纳米技术
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Liuqing Chen,Xiuhong Meng,Huibo Qin,Xiao Ling,Zebing Bao,Zhiqiang Xie,Xinping Ouyang,Linhai Duan
The coupling of liquefied natural gas and adsorbed natural gas charging (LNG-ANG) can effectively recover boil-off gas, with the key challenge being the development of efficient and stable adsorbents under cryogenic conditions (∼159 K). HKUST-1 is regarded as a promising methane adsorbent due to its abundant microporous structure and high specific surface area. However, its practical application is largely limited by water instability. After exposure to humid air for 10 days, the pristine HKUST-1 lost 68.17% of its specific surface area and 30.77% of its methane uptake capacity. Herein, we successfully prepared a water-stability-enhanced HKUST-1-PVP composite by grafting polyvinylpyrrolidone (PVP) onto the coordinatively unsaturated metal sites of HKUST-1. Among the samples, HKUST-1-P2 maintained a high specific surface area of 1242 m 2 g −1 (a loss of only 3.27%) and essentially unchanged methane uptake capacity even after exposure to humid air for at least 70 days. Furthermore, under LNG-ANG adsorption conditions (159 K, 6 bar), the methane uptake capacity of HKUST-1-P2 reached 234 cm 3 (STP) cm −3 , which is 2.6 times that of HKUST-1. These results indicate that the PVP modification strategy significantly enhances the structural stability of HKUST-1 and further stabilizes its methane adsorption performance. Computational simulations revealed that PVP grafting onto unsaturated Cu sites creates a barrier that blocks water access, thereby effectively enhancing the material's water stability. This work not only provides a simple and effective strategy for constructing water-stable MOF adsorbents but also advances the practical application of HKUST-1 materials in LNG-ANG technology.
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Laser & Photonics Reviews
·
2025
·
IF 10
Xulan Xue,Chenhui Zhang,Huidan Zhang,Xingchen Lin,Yongqiang Ning,Lijun Wang,Wenyu Ji,Hongbo Zhu
The performance of a perovskite light-emitting diode (PeLED) is strongly dependent on the perovskite film quality. Among them, the buried interface plays a critical role in the crystallization dynamics of perovskite, directly determining the film morphology and optical properties. Herein, we demonstrate the buried interface engineering to regulate the crystallization kinetics of quasi-2D perovskite film by inserting a poly(vinyl pyrrolidone) (PVP) modification layer between the hole transport layer and perovskite film. The strategy enhances the surface wettability of the hole transport layer, facilitating the uniform coverage of perovskite. Meanwhile, the carboxyl groups in PVP can interact with undercoordinated Pb ions in perovskite to increase the crystallization sites, thereby effectively passivating defects, regulating phase distribution, and suppressing the formation of low-dimensional phases. Ultimately, a green PeLED treated with PVP modification layer has achieved a high external quantum efficiency of 24.2%, representing an 87% enhancement. Our results highlight the potential of interface engineering based on functional group interactions as an innovation strategy, enabling significant advances in PeLED efficiency.
研究领域:
材料科学
·
光电子学
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纳米技术
·
半导体器件
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JOURNAL OF HAZARDOUS MATERIALS
·
2011
·
IF 3.723
Hua Chen,Hanjin Luo,Yuecun Lan,Tingting Dong,Bingjie Hu,Yiping Wang
The interactions of tetracycline (TC) with nanoscale zerovalent iron (NZVI) modified by polyvinylpyrrolidone (PVP-K30) were investigated using batch experiments as a function of reactant concentration, pH, temperature, and competitive anions. Transmission electron micrographs (TEM), BET surface area and Zeta (ζ)-potential analyses indicated that the mean particle size was 10–40 nm with a surface area of 36.90 m 2 /g, and a iso-electric point of PVP-NZVI was 7.2. The results of X-ray diffraction (XRD) and high-resolution X-ray photoelectron spectroscopy (HR-XPS) of modified nanoscale zerovalent iron (PVP-NZVI) revealed that the iron nanoparticles likely have a core of zero-valent iron (Fe 0 ), while a shell is largely made of iron oxides . Degradation of TC was strongly dependent on pH and temperature. The presence of silicate and phosphate strongly inhibited the removal of TC, whereas acetate and sulfate only caused slight inhibition. LC–MS analysis of the treated solution showed that the degradation products from TC resulted from the removal of functional groups from the TC ring. The degradation products were detected both in the treated solution (initial pH of 3.0 and 6.5) and on the surface of PVP-NZVI after 4-h interaction, indicating that PVP-NZVI can adsorb both TC and its degradation products.
研究领域:
环境科学
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材料科学
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Yu Zhang,Pengli Zhu,Gang Li,Zhen Cui,Chengqiang Cui,Kai Zhang,Jian Gao,Xin Chen,Guoqi Zhang,Rong Sun,Chingping Wong
Elliptic Cu–Ag nanoflakes were syntheszied via facile in situ galvanic replacement between prepared Cu particles and Ag ions. Alloy nanoflakes with high purity and uniformity present a size of 700 × 500 nm, with a thinness of 30 nm. Nontoxic and low-cost polyvinyl pyrrolidone was used as a dispersant and structure-directing agent, promoting the formation of the remarkable structure. Synthesized nanoflakes were utilized as a filler for conductive paste in an epoxy resin matrix. Conductive patterns on flexible substrates with a resistivity of 3.75 × 10–5 Ω·cm could be achieved after curing at 150 °C for 2 h. Compared with traditional silver microflakes, smart alloy nanoflakes provide much improved conductive interconnection, whose advantage could be attributed to their nanoscale thicknesses. It is also noteworthy that the conductive patterns are able to tolerate multiple bendings at different angles, having good conductivity even after 200 repeated bendings. Therefore, alloy nanoflakes could be a promising candidate conductive filler for flexible printing electronics, electronic packaging, and other conductive applications.
研究领域:
材料科学
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化学工程
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NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 39
·期 12
·9518-9524
·
IF 3.086
Lin Zhong,Tong Yang,Jian Wang,Cheng Zhi Huang
The catalysis of nanomaterials is interesting and attractive. Herein, electrospinning was employed to afford poly(methyl acrylate) (PMAA)–poly(vinyl pyrrolidone) (PVP) electrospun nanofibers. Next, in situ photosynthesis resulted in the formation of a uniform assembly of silver nanoparticles (AgNPs) over the electrospun fibers, generating AgNPs–PMAA–PVP electrospun nanofibers. The as-formed AgNPs–PMAA–PVP electrospun nanofibers were utilized for investigating the catalytic reduction of 4-nitrophenol (4-NP) in the presence of NaBH4. For the in situ synthesis, the available light sources used included sunlight, table lamps, and 365 nm UV lamps. The results showed that the AgNPs–PMAA–PVP electrospun nanofibers could catalyze the reduction of 4-NP in the presence of NaBH4, generating 4-aminophenol (4-AP), therefore reducing the toxicity of 4-NP. After the use of the AgNPs–PMAA–PVP electrospun nanofibers for up to 4 cycles, the catalytic efficiency remained as high as 90%, suggesting that the noble metal/polymeric electrospun nanofibrous catalyst is highly effective and reusable.
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SENSORS
·
2017
·Vol. 17
·期 10
·2415
·
IF 2.677
Hui Yang,Qiangqiang Ye,Ruixue Zeng,Junkai Zhang,Lei Yue,Ming Xu,Zhi-Jun Qiu,Dongping Wu
In this paper, capacitive-type humidity sensors were prepared by sequentially drop-coating the aqueous suspensions of zinc oxide (ZnO) nanopowders and polyvinyl pyrrolidone–reduced graphene oxide (PVP-RGO) nanocomposites onto interdigitated electrodes. Significant improvements in both sensitivity and linearity were achieved for the ZnO/PVP-RGO sensors compared with the PVP-RGO/ZnO, PVP-RGO, and ZnO counterparts. Moreover, the produced ZnO/PVP-RGO sensors exhibited rather small hysteresis, fast response-recovery time, and long-term stability. Based on morphological and structural analyses, it can be inferred that the excellent humidity sensing properties of the ZnO/PVP-RGO sensors may be attributed to the high surface-to-volume ratio of the multilayer structure and the supporting roles of the PVP-RGO nanocomposites. The results in this work hence provide adequate guidelines for designing high-performance humidity sensors that make use of the multilayer structure of semiconductor oxide materials and PVP-RGO nanocomposites.Keywords:ZnO nanopowders;RGO;PVP;capacitive humidity sensor
研究领域:
材料科学
·
传感器技术
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Nanoscale
·
2018
·Vol. 11
·期 3
·1245-1252
·
IF 7.233
Kaixi Bi,Yiqin Chen,Qiang Wan,Tuo Ye,Quan Xiang,Mengjie Zheng,Xuejiao Wang,Qing Liu,Guanhua Zhang,Yongtao Li,Yupeng Liu,Huigao Duan
Reliable fabrication of gold nanoparticles with desirable size, geometry and spatial arrangement is essential for plasmonic applications. A common fabrication flow usually involves electron-beam lithography and a vacuum-evaporation-based lift-off process or etching. In this work, we evaluate an alternative approach to directly fabricate a plasmonic gold nanoparticle array without involving the vacuum evaporation process by using a chloroauric acid/poly(vinyl pyrrolidone) (HAuCl4/PVP) hybrid as a functional electron-beam resist. Systematic experiments were conducted to investigate the patterning behaviors in the fabrication process. With the optimized fabrication parameters, we show that the HAuCl4/PVP composite resist has a high patterning resolution and pure gold nanoparticles with tens of nanometers can be obtained after an annealing-based pyrolysis process. More particularly, compared to the patterned plasmonic gold nanoparticles obtained by conventional methods, the gold nanoparticles fabricated by our method can be transferred to soft substrates due to the absence of an adhesion layer, enabling various potential applications in flexible and stretchable optics. As an example, we demonstrated that the transferred gold nanoparticle array can be conformably assembled onto a flat gold surface to form a particle-on-film structure for surface-enhanced Raman scattering (SERS) applications.
研究领域:
纳米技术
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材料科学
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光学工程
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Materials Today Chemistry
·
2022
·
IF 7.613
S. Cai,G. Zhang,L. Wang,T. Jian,J. Xu,F. Su,Y. Tian
Fluorescent sensors with low detection limits and fast responses have caused significant attention for their application in medical diagnoses. Herein, we described the construction of ratiometric nanofibers (NFs) for sensing breath ammonia (NH 3 ), which was an important biomarker for Helicobacter pylori ( Hp ) affection, by integrating of a ‘turn on’ fluorescent probe of fluorescein (FLU, green emission) and a ‘turn off’ fluorescent probe of difluoroboron-curcumin analog (BFC, red emission). Such NFs were constructed by coaxial electrospinning using thermoplastic polyurethane (TPU) with FLU as the shells and polyvinyl pyrrolidone (PVP) with BFC as the cores. The core/shell structures of NFs provided independent channels for the chosen fluorophores and enabled the sensor with low humid interferences, high mechanical properties and outstanding NH 3 sensing performance. This nanofibers-based sensor showed superior sensitivity with an NH 3 theoretical detection limit of ∼7.16 ppb, quick response time of ∼2.2 s, high selectivity and reversibility for NH 3 , and excellent stability in various conditions, especially under high humid conditions. Furthermore, because of the use of two probes with reverse sensing trends in the red and green emitting windows, the ratiometric sensor showed clear color changes when tracing NH 3 , which was visualized by eyes and cameras easily. Preliminary tests for Hp infection subjects showed that the NH 3 changing levels before and after urea-pill ingestion were much higher than those healthy subjects. Thus, an appropriate combination of polymeric matrixes with NH 3 -sensitive probes in the form of dual-emission coaxial NFs as the ratiometric sensor is expected to be used as a simple approach/tool for monitoring trace NH 3 concentrations and broadening the sensing design strategy.
研究领域:
医学诊断
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材料科学
·
生物化学
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