ACS Applied Polymer Materials
·
2026
·
IF 5.2
Wang Wei,Huang Yanyou,Ye Liangdong,Jiang Li,Pan Yanlan,Zhang Xianhui,Lu Shaorong
Fresh natural rubber latex (NRL) is rich in nutrients
such as proteins
and sugars, making it highly susceptible to microbial growth and deterioration.
Traditional ammonia-based preservatives generate irritating gases,
posing hazards to worker health and the environment. Therefore, developing
an effective, ammonia-free, and eco-friendly preservative for NRL
is urgently needed. Herein, we report a facile one-pot synthesis of
a polyvinylpyrrolidone (PVP)/xanthan gum (XG)/Cu 2 O (PX/Cu 2 O) submicron suspension as an efficient ammonia-free preservative
for NRL. In this process, PVP regulates the particle size distribution
of Cu 2 O through steric hindrance, while XG provides long-term
stability via its steric hindrance and weak gel network, resolving
the problems of agglomeration and sedimentation of submicron particles
at high concentrations. The resulting PX/Cu 2 O preservative
exhibits excellent long-term stability, with a ζ-potential of
−32.85 mV and no obvious sedimentation for 7 days. It also
demonstrates excellent broad-spectrum antibacterial activity, with
inhibition zone diameters of 18.35 mm against Staphylococcus aureus ( S. aureus ) and 19.26 mm against Escherichia coli ( E. coli ), and a minimum
inhibitory concentration of 1.28 g/L. In NRL preservation tests, an
addition of only 0.4% (w/w) of PX/Cu 2 O extended the shelf
life of fresh NRL to over 7 days, outperforming traditional ammonia
preservation. Moreover, at this dosage, PX/Cu 2 O also improved
the mechanical properties of both raw and vulcanized NRL sheets without
adversely affecting their processing properties. This method is cost-effective
and scalable, offering a practical strategy for the ammonia-free preservation
of fresh NRL and holding great promise for industrial application.
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ACS Applied Energy Materials
·
2026
·
IF 5.5
Xinying Liu,Jing Zhao,Yao Zhao,Xiaolan Chen,Zhaohui Li,Gangtie Lei
In this work, CuS@PVP nanospheres with large specific surface areas were successfully prepared via a one-step hydrothermal process by introducing the polyvinylpyrrolidone (PVP) surfactant into the precursor and modulating its dosage. As an anode material for aqueous zinc-ion batteries, the prepared CuS@PVP can shorten the transmission distance of Zn2+ and electrons and increase the number of reaction sites. CuS@PVP with 0.2 g of PVP added has a specific capacity of 305.4 mAh g–1 at a current density of 0.2 A g–1 and an ultralong cycle life of 2000 cycles at a current density of 2 A g–1. In addition, the capacity of the CuS@PVP||Na–MnO2 full cell is as high as 220.0 mAh g–1 at a current density of 0.2 A g–1, and the capacity retention rate is 85.9% after 100 cycles. The results prove that CuS@PVP is an excellent choice as an anode material for aqueous zinc-ion batteries.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yusong Yang,Weiya Tian,Junxian Hu,Xiaoling Wang,Kun Ren,Xianghao Meng,Yanqiu Xu,Xuanli Chen,Jiaju Lu,Bin Yang,Qing Zhao,Bo Jin,Yaochun Yao
Polyvinylpyrrolidone (PVP) selectively chemisorbs on Cu(111) over Cu(220) with ΔE = 3.114 eV. • Single PVP additive (50 mg/L) increases tensile strength by 70.8% (410 MPa) and elongation by 208% (4.0%). • PVP induces hierarchical synergy: grain refinement, dominant (220) texture (Tc = 76%), and more Σ3 twin boundaries. • Adsorbed PVP raises cathodic overpotential and nucleation density by 32.6%, enabling Hall-Petch strengthening. • DFT, XPS, and FT-IR confirm plane-selective chemisorption via C=O→Cu coordination bonding. Enhancing the mechanical properties of electrodeposited copper foil, an essential current collector for negative electrodes in lithium-ion batteries, is crucial for the development of high-energy–density battery. Although chemical additives are widely employed to modulate copper electrodeposition, attaining simultaneous improvements in both strength and ductility remains challenging due to complex additive interactions and incomplete mechanistic insights. This work proposes polyvinylpyrrolidone (PVP) as a versatile single additive for hierarchical microstructural regulation in ultrathin copper foils. With an optimum PVP concentration of 50 mg/L, the produced copper foil demonstrated a tensile strength of 410 MPa (a 70.8% increase) and an elongation of 4.0% (a 208% increase). Microstructural analysis shows that PVP induces a synergistic evolution: refining the grain size, facilitating a dominant (220) texture, and raising the fraction of Σ3 twin boundaries. Combined DFT, XPS, and FT-IR analyses reveal the atomic-scale mechanism: the polar carbonyl groups selectively chemisorb onto Cu(111) via C=O → Cu coordination, with stronger adsorption on Cu(111) than on Cu(220). This suppresses (111) growth, raises overpotential, and enhances nucleation density, resulting in microstructural synergy. These results establish a direct causal chain from selective interfacial adsorption to electrochemical regulation and hierarchical microstructural evolution, ultimately leading to enhanced strength and ductility. Download: Download high-res image (147KB) Download: Download full-size image
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CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Shuping Wu,Kanghui Li,Weijian Shi,Jiawei Cai
Nanofibrous membrane have great potential in the field of water purification due to the high porosity and large specific surface area. Herein, a dual layers nanofibrous membrane was prepared by combining an active layer containing carbon nanotubes (CNTs) with a porous chitosan (CS)/polyvinylpyrrolidone (PVP)/polyvinyl alcohol (PVA) nanofibrous support layer via electrospinning-electrospray technique for highly efficient heavy metal and organic pollutants removal. Incorporating CNTs into the active layer offered additional nanochannels which significantly enhanced pure water permeate flux (1533.26 L·m −2 ·h −1 ) and heavy metal ions/dyes rejection (Cu 2+ 95.68 %, Ni 2+ 93.86 %, Cd 2+ 88.52 %, Pb 2+ 80.41 %, malachite green 87.20 %, methylene blue 76.33 %, and crystal violet 63.39 %). The optimal membranes were formed with a thickness of 20 μm and a roughness of 142 nm while still showing good perm-selectivity compared with commercial PVDF membrane. Moreover, the constructed membrane exhibited good antifouling property and long-term stability during filtration process. This work provides a new strategy to fabricate advanced separation membranes for water treatment.
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PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2018
·
IF 3.649
Heng Yu,Chao Fan,Yu Cheng,Benhua Huang,Yu Li,Junjie Zhang,Aqun Zheng,Yang Sun
A series of titanium-aluminum binary oxides are prepared through co-precipitation of metal salts with polyvinylpyrrolidone (PVP) in alkaline solution, along with dehydration. Most of synthetic oxides are composed of micro- or nano-sized blocks, while one of them shows an interesting two-dimensional morphology. Furthermore, loading of aluminum into co-precipitation would increase product porosity compared with the non-loaded case, while addition of PVP shows influences on building micropores of synthetic oxide. In catalysis, the synthetic oxides usually show high activities for nitration of various arenes. The key factors affecting catalytic outputs are carefully discussed, and the matching relation between shape of substrate and pore distribution of catalyst may affect catalytic efficiency too. Moreover, the binary oxide featuring PVP shows more durable recycling behavior than the non-doped one. On the other hand, nitration reactions of naphthalene and benzene halides show better stereoselectivities than those of alkylbenzenes. In general, this study may contribute to the catalytic progress of new oxide materials.
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CHROMATOGRAPHIA
·
2019
·Vol. 82
·期 10
·1579-1583
·
IF 1.552
Lou Chunli,Zheng Mengmeng,Xu Yao,Shen Yuting,Kang Jingwu
A sensitive method was developed for detecting 2,2′-azobis(2-amidinopropane) dihydrochloride in polyvinylpyrrolidone by capillary electrophoresis with indirect UV detection. The detection sensitivity was improved significantly using the field-amplified sample injection technique. The background electrolyte was composed of 25 mM imidazole-HCl solution (pH 4.0), in which imidazole acted as the cation probe for the indirect detection at UV 214 nm. Effects of the experimental parameters including pH, the concentration of imidazole as well as the sample injection time on sample preconcentration were investigated and optimized. Under the optimized conditions, baseline separation of 2,2′-azobis(2-amidinopropane) ion with other ions in the polyvinylpyrrolidone samples was achieved within 8 min. The RSD% for the repeatability of the migration time and the peak area were determined as 0.95% and 3.47%, respectively. The limit of detection (LOD, S / N = 3) and the limit of quantitation (LOQ, S / N = 10) were determined as 1.11 × 10 −5 M and 2.77 × 10 −5 M, respectively. The measured recovery at three concentration levels was in the range of 101–104%. This method was successfully applied to detect 2,2′-azobis(2-amidinopropane) in the commercial polyvinylpyrrolidone samples.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2014
·Vol. 25
·期 8
·851-860
·
IF 1.964
Hui Qin,Shengqiang Nie,Chong Cheng,Fen Ran,Chao He,Lang Ma,Zehua Yin,Changsheng Zhao
Applications of blood purification membranes are fuelled by diverse clinical needs, such as hemodialysis, hemodiafiltration, hemofiltration, plasmapheresis, and plasma collection. For clinical usage, the adding of polyvinylpyrrolidone (PVP) is the general protocol for the design of antifouling and antithrombotic properties integrated artificial membranes. In the present work, to insight into the detailed surface properties and blood compatibilities of the PVP blended composite membranes, we synthesized a series of PVP polymers with different molecular weights using reversible addition fragmentation chain transfer polymerization and designed a series of polyethersulfone (PES)/PVP composite membranes by a physically blending method. The effects of PVP molecular weights and blending ratios on the surface properties and the blood compatibilities of the composite membranes were investigated in detail. The surface attenuated total reflection Fourier transform infrared spectra and scanning electron microscopy pictures indicated that the PVP was successfully immobilized into the membranes, and the composite membranes exhibited morphology transformation from finger-like structure to sponge-like structure, which indicated that the composite membrane had tunable porosity and permeability by adding PVP. The blood compatible tests revealed that the composite membranes showed increased hydrophilicity, decreased plasma protein adsorption, suppressed platelet adhesion, and prolonged blood clotting time compared with pristine PES membrane. These results indicated that the PES/PVP composite membranes exhibited enhanced antifouling and antithrombotic properties than the pristine PES membrane. Meanwhile, the results also suggested that the composite membranes with larger molecular weight PVP and higher blending ratios might show better blood compatibility. Copyright © 2014 John Wiley & Sons, Ltd.
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SYNTHETIC METALS
·
2016
·
IF 2.299
Gang Fu,Li Ma,Mengyu Gan,Xiuling Zhang,Meng Jin,Yao Lei,Peishu Yang,Maofa Yan
This research paper describes a facile strategy to synthesize the novel 3D Spongia-shaped polyaniline/MoS 2 nanospheres composite under the addition of polyvinylpyrrolidone (PVP) (named sPANI/A-MoS 2 ), and this composite displays excellent electrochemical properties as an electrode material for supercapacitors. The structure and morphology of the as-prepared 3D sPANI/A-MoS 2 are characterized by scanning electron microscopy (SEM), Fouriertransform infrared (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS), Raman spectroscopy measurements and Thermogravimetric Analysis (TGA). Cyclic voltammograms (CV) and galvanostatic charging/discharging (GCD) tests are adopted to evaluate the electrochemical performances of the composite. All the results powerfully demonstrate the successful fabrication of 3D sPANI/A-MoS 2 . The maximum specific capacitance of this composite reaches up to 605 F g −1 at a current density of 1 A g −1 , and the energy density of 53.78 Wh kg −1 is obtained at a power density of 0.4 kW kg −1 . Notably, the capacity retention of the as-fabricated sPANI/A-MoS 2 composite electrode can maintain 88.6% (well above 59.8% for sPANI) after constant charge-discharge 1000 cycles, showing an excellent electrochemical stability.
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Advanced Materials Interfaces
·
2016
·Vol. 3
·期 15
·1600153
·
IF 3.365
Xinglong Pan,Qingzhong Xue,Jianqiang Zhang,Qikai Guo,Yakang Jin,Wenbo Lu,Xiaofang Li,Cuicui Ling
Multi-walled carbon nanotubes (MWCNTs)/hydrophilic poly(vinylpyrrolidone) (PVP) films are prepared by a simple spin-coating method and the resistive humidity sensing properties of the films are studied in detail. It is demonstrated that the thermally treated MWCNTs/PVP film exhibits a reproducible and great response over a wide relative humidity range from 11% to 94%, fast response time (less than 15 s) and ultrafast recovery time (less than 1.8 s), which are superior to that of pristine PVP films. The effective enhancement of humidity sensing characteristics of MWCNTs/PVP films can be explained by the MWCNTs/PVP interfacial effect. The thermally treated MWCNTs/PVP films can be used as robust, cost-effective, and easy-to-use resistive humidity sensors. And the design concept used in this work can be extended to other carbon composites to fabricate excellent sensing materials for sensors.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Ayman K. El-Sawaf,Abdelrahman M. Abdelgawad,Amal A. Nassar,Dalia A. Elsherbiny
The increasing threat of spoilage bacterial infections, driven by the resistance of bacteria to many antimicrobial treatments, is a significant worldwide public health problem, especially concerning food preservation. To tackle these difficulties, this research investigates the possibility of using packaging sheets that include antimicrobial agents and increasing the prolonged storage time by preventing the bioburden of foodborne pathogens . This approach uses metal nanoparticles' ability to prevent harmful bacteria that cause food spoiling. Gallium nanoparticles (GaNPs) were created using a water-based extract from Andrographis paniculata leaves as a bioreducing agent. The GaNPs were added to a film made of sodium alginate (SA) and polyvinylpyrrolidone (PVP). The study showed that incorporating GaNPs into polymer films resulted in films with a desirable contact angle and decreased water vapor permeability. Significantly, the developed films demonstrated increased efficiency against E.coli O157 compared to other species. Also, it exhibited increased vulnerability to bacterial strains at the biofilm stage, surpassing PVP-SA/GaNPs-0. Remarkably, the toxicity tests showed that the films exhibited no cytotoxicity. Overall, the films indicated their potential for avoiding bacterial bioburden, prolonging the shelf life of perishable products , and contributing to diverse antimicrobial applications in the food industry.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Jinfan Li,Chunyan Liu,Xinwen Jia,Mengyun Lu,Ajuan Yu,Benlai Wu
Chiral membranes have limited permeability and selective trade-off, which has been a major problem in chiral membrane separations. To address this issue, the carboxylated cellulose (CC) membranes were prepared with small pore size and low resistance substrate by regulating the amount of polyvinylpyrrolidone (PVP) and casting solution, and the CC@CuLBH composite membrane with chiral separation capability was fabricated by in situ formation of well-dispersed [Cu( L -mal)(Bipy)]·H 2 O (CuLBH) with the carboxyl group on the surface of CC membrane as the metal anchor points. Under the optimal conditions, the CC@CuLBH membrane showed good chiral separation ability with an ee value of 60% for R -1-(1-naphthyl)ethanol ( R -NE). Compared with the CC/CuLBH membrane formed by physical blend, the CC@CuLBH membrane exhibited improved enantioselective permeation for R -NE enantiomer. Both the unique chiral microenvironment of CuLBH and the regular pore structure of CC membrane, in addition to their synergistic effects resulted in the highly permeable and enantioselectivity for the CC@CuLBH composite membrane, which broadened the preparation method of chiral membrane.
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Naipu He,Wen Li,Tingting Shi,Zongjie Li,Fengchuan Guo,Zongxin Li,Xuerui Zhao
ZIF-8@chitosan (CS)/polyvinylpyrrolidone (PVP) hydrogels (CPxHGZ) were fabricated by in situ growth of metal–organic framework (MOF) crystals on the network of CS/PVP semi-interpenetrating hydrogels. The ZIF-8 crystals were assembled in the channel of hydrogel and coated by networks of hydrogel. Morphology and distribution of the ZIF-8 crystals in CS/PVP hydrogels were modulated by the polymer network of hydrogels. PVP played a key role in guiding the growth of ZIF-8 crystals and preventing aggregation of ZIF-8 crystals in the network of CS/PVP hydrogel. Additionally, the PVP content in hydrogels influencing the adsorption capacity of CPxHGZ for CO2 was explored. With increasing PVP content in the hydrogels, the equilibrium adsorption of CPxHGZ for CO2 was increased. Especially, the equilibrium adsorption of CP10HGZ for CO2 was increased by 22%, which was higher than that of the pure ZIF-8 crystals. The results of kinetic simulation, XRD spectra, and FT-IR spectra revealed that the adsorption mechanism of CPxHGZ for CO2 was mainly chemisorption. The presence of multisites, including the amine groups in CS and PVP as well as metals in ZIF-8, was beneficial for enhancing the adsorption capacity of CPxHGZ for CO2.
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