JOURNAL OF MEMBRANE SCIENCE
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2011
·
IF 3.673
Song Zhao,Zhi Wang,Xin Wei,Xinxia Tian,Jixiao Wang,Shangbao Yang,Shichang Wang
Polysulfone (PSf) ultrafiltration (UF) membranes were prepared by non-solvent induced phase separation process using two kinds of additives, i.e., polyvinylpyrrolidone (PVP) as a representation of water soluble polymers and polyaniline (PANI) nanofibers as a representation of nanomaterials. The effects of PVP and PANI nanofibers on membrane formation mechanism, structure and performance were systematically investigated, compared and analyzed. The thermodynamic and rheologic properties of the casting solutions were studied through cloud point titration measurement and viscosity measurement. Variations of the casting film during preevaporation and after immersed into the coagulation bath were observed through mass variation measurement, optical microscopy measurement and light transmission measurement. Membrane structure was characterized by X-ray photoelectron spectroscopy, scanning electron microscope and contact angle measurement. Membrane performance was evaluated by pure water flux, protein rejection, antifouling property, additive stability and mechanical property. The results demonstrated that at the same additive content, PSf/PANI nanocomposite membranes had higher protein rejections, higher antifouling property, better additive stability and larger breaking strength than PSf/PVP membranes. The correlations among membrane formation mechanism, structure and performance were also discussed in detail.
研究领域:
材料科学
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膜技术
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高分子科学
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分离过程
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纳米材料
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DOI
高影响因子
RSC Advances
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2015
·Vol. 6
·期 5
·3870-3881
·
IF 3.84
Dan Cheng,Rongrong Xie,Tianhong Tang,Xiaolong Jia,Qing Cai,Xiaoping Yang
The hybrids of bioactive glass-ceramic (BG) decorated carbon nanofibers (CNFs) have drawn wide interest as bone repairing materials. Herein, hybridized CNFs were produced from electrospinning the mixture solution of polyvinylpyrrolidone (PVP) and BG sol–gel precursors, followed by preoxidation and carbonization. Choosing 45S-type BG (mol%: 46.10% SiO2–41.48% CaO–12.42% P2O5) as the model, the interaction of BG precursors with PVP and the micro-structural evolution of CNF/BG composites were systematically evaluated in relation to aging times (1–7 days) of BG precursor solution. With aging time prolonging, BG precursors underwent morphological changes from small sol clusters with a loosely and randomly branched structure at 1 day, to a fully developed Si-network structure at 3 days, and finally to a dense Si-network at 7 days. On one hand, it showed continuous increase in network linking degree. On the other hand, the gel particles underwent the process of size increase and subsequently decrease. This directly influenced the miscibility between BG precursors and PVP in solution, and the surface morphology of CNF/BG composites. At short aging times, the sol–gel solution of BG precursors mixed uniformly with PVP and the resulting BG nanoparticles were less likely to migrate toward the fiber surface. With the aging time prolonging, the phase separation between BG precursors and PVP facilitated more BG nanoparticles to form on the fiber surface. Calcium ions were found to be able to interact with carbonyl groups in PVP, while phosphorus element would be lost gradually depending on aging time, which led the CaSiO3 formed in the final CNF/BG changing from a weak to strong crystal state along with longer aging time. By soaking in simulated body fluid, it was found that the CNF/BG composites prepared from BG precursor sol–gel solution with 7 day aging demonstrated the fastest apatite deposition, which was ascribed to those abundant BG nanoparticles on the fiber surface having exposed numerous nucleation sites for the apatite deposition. Promisingly, CNF/BG composites developed from electrospinning and carbonization of PVP/BG sol–gel mixtures were envisioned good choices for bone repairing.
研究领域:
材料科学
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生物医学工程
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组织工程
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纳米技术
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生物材料
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DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2025
·
IF 13.1
Gang Qiao,Yuyang Zhao,Pan Wang,Dongshuai Hou,Binmeng Chen
Interface between calcium silicate hydrate (CSH) and polymers is crucial for the mechanical properties and durability. However, direct experimental determination of interfacial mechanics at nanoscale has not been reported. Herein, atomic force microscopy (AFM) with grafted Poly (1-vinylpyrrolidone- co -acrylic acid) (PVP-co-PAA) on AFM tips were utilized to measure interfacial properties between CSH and PVP-co-PAA under four C/S at nanoscale. The interfacial force curves were clearly presented for the first time. Results showed that compared to as-received tip, representing SiO 2 , the adhesive force and energy dissipation increased by 72.42 % and 417 %. Interface separation speed was delayed by 300 % ∼ 400 %. Molecular simulations of interfacial separation aligned with AFM experimental results, where interfacial ion-pair, dynamics stability and polymer conformational changes provided insights for AFM experiment on adhesion force and delay of interface separation speed. Determination of interfacial mechanics by AFM experiment and insights by molecular simulation decoded CSH/PVP-co-PAA interfaces thoroughly.
研究领域:
材料科学
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纳米技术
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2024
·
IF 6.3
Song He,Jianxu Gao,Xin Jin,Saiping Guo,Yajun Huang
Sulfate radical-based advanced oxidation technologies (SR-AOPs) are extensively employed in the degradation of diverse wastewater pollutants owing to their superior capacity for degrading emerging and recalcitrant pollutants and their excellent adaptability. However, how to reduce the secondary pollution caused by metal ion spillage is still a major problem. In this work, Co 2+ was introduced into the molding process of SiO 2 microspheres as a novel activator of per-oxomonosulfate (PMS), which 15 mg of the catalyst completely degraded 100 mL of 40 mg/L of Rhodamine B (RhB) in 10 min, with a low Co leaching of only 0.18 mg/L. The effects of the introduction of Co, the addition of polyvinylpyrrolidone (PVP), H 2 O, and PMS, and the adjustment of pH, temperature, and anionic inorganics on the degradation of RhB were investigated. Based on the PMS activation mechanism analysis, it was concluded that the degradation of RhB involves two pathways, including the non-radical pathway dominated by 1 O 2 and mediated electron transfer and the radical pathway dominated by SO4 − , OH, and O2 − . This study presents a novel hybrid catalyst with high efficiency and easy recyclability, good recyclability, and low secondary pollution, which provides valuable insights into the field of wastewater treatment.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Materials Today Chemistry
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2024
·
IF 6.7
Haidong Zhao,Xiangfei Xiao,Hao Xing,Xin Jia,Shuping Jin
Intelligent wearable strain sensors are indispensable for monitoring human locomotion and human–machine interactions. Herein, we present a nanocomposite ionogel film (thickness of 0.2 mm) prepared using polyvinylpyrrolidone (PVP), polyurethane (TPU), 1-butyl-3-methylimidazolium hexafluorophosphate, and black phosphorus (BP) in a dimethylformamide solution, referred to as BP@PVP/TPU, using the electrostatic spinning. While the ionogel film exhibited exceptional properties, including excellent self-adhesiveness, high tensile strength (1866 %), and high fracture strength (0.59 MPa), at room temperature, it displayed high tensile strength (940 %) and high fracture strength (3.01 MPa) even when stored at −35 °C for up to 15 days. Subsequently, a self-adhesive strain sensor was fabricated from the BP@PVP/TPU ionogel using copper wire. After 1000 pull-up cycles under 30 % strain, the sensing signal remained essentially unchanged, and the sensor exhibited satisfactory adhesion to different substrates (e.g., an impressive adhesion strength of up to 299 kPa to iron sheets). The excellent performance of the BP@PVP/TPU ionogel enabled the developed sensor to monitor various human body movements in real time. This approach is both economical and convenient and provides an innovative avenue for developing next-generation wearable strain sensors.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Yufei Zhang,Jing Jin,Daoxue Zhou,Huihui Liu,Jinmei Lu,Mingming Zheng
Covalent organic frameworks (COFs) are crystalline, porous organic materials that have significant potential as supports for enzyme immobilization. Nevertheless, the in situ preparation of biocatalysts during the COF formation process remains a considerable challenge. Herein, we developed a one-pot in situ preparation strategy. The immobilized lipase PS@TPB-TFPB COF-I was fabricated by mixing the polyvinylpyrrolidone (PVP)-lipase PS complex with precursors 1,3,5-tris(4-aminophenyl)benzene (TPB) and 1,3,5-tris(4-formylphenyl)benzene (TFPB) in acetonitrile catalyzed by acetic acid at room temperature for 48 h. The formation mechanism was systematically investigated using time-dependent microscopy techniques. PVP acts as a guiding reagent, controlling the morphological changes that occur during this process. Furthermore, the biocatalyst was employed in the kinetic resolution of racemic 1-phenylethanol, resulting in a significant enhancement in the conversion rate, with a range of 2.1 to 10.6 times higher compared to free PS at the same reaction time. The robust biocatalyst maintained high catalytic activity and enantioselectivity even after 10 cycles. The strategy described here is promising for lipase immobilization and expands the range of applications for COFs in biomanufacturing.
研究领域:
生物化学
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材料科学
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酶工程
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2023
·
IF 6.7
miaomiao yuan,Rongjun Zhang,Shuxiang Xu,Lihao Guo,Luoyijun Xie,Yingying Liao,Yang Xu,Xuemei Fu
Photothermal therapy (PTT) is an emerging field, and the photothermal agents could convert visible or near-infrared (NIR) radiation into heat to kill tumor cells. However, the low photothermal conversion efficiency of photothermal agents and their limited antitumor activities delay the development of these agents into monotherapies for cancer. Herein, we have fabricated an ultrasmall polyvinylpyrrolidone (PVP)-Fe-Cu-Ni-S (PVP-NP) nano-agent via a simple hot injection method with an excellent photothermal conversion efficiency (~96%). Photothermal therapy with this nano-agent effectively inhibits tumor growth without apparent toxic side effects. Mechanistically, our results demonstrated that, after NIR irradiation, PVP-NPs can induce ROS/singlet oxygen generation, decrease mitochondrial membrane potential, and release extracellular Fe2+ and consume glutathione, triggering autophagy and ferroptosis of cancer cells. Moreover, PVP-NPs exhibit excellent contrast enhancement according to magnetic resonance imaging (MRI) analysis. In summary, PVP-NPs have a high photothermal conversion efficiency and can be applied for MRI-guided synergistic photothermal/photodynamic/chemo-dynamic cancer therapy, solving the bottleneck of existing phototherapeutic agents.
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 8
·7649
·
IF 5.6
Yanjing Liu,Xiyue Li,Yuezhou Liu,Yaping Huang,Fuming Wang,Yongfang Qian,Ying Wang
Due to their high porosity, large specific surface area, and structural similarity with the extracellular matrix (ECM), electrospun nanofiber membranes are often endowed with the antibacterial properties for biomedical applications. The purpose of this study was to synthesize nano-structured Sc2O3-MgO by doping Sc3+, calcining at 600 °C, and then loading it onto the PCL/PVP substrates with electrospinning technology with the aim of developing new efficient antibacterial nanofiber membranes for tissue engineering. A scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDS) were used to study the morphology of all formulations and analyze the types and contents of the elements, and an X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform attenuated total reflection infrared spectroscopy (ATR-FTIR) were used for further analysis. The experimental results showed that the PCL/PVP (SMCV-2.0) nanofibers loaded with 2.0 wt% Sc2O3-MgO were smooth and homogeneous with an average diameter of 252.6 nm; the antibacterial test indicated that a low load concentration of 2.0 wt% Sc2O3-MgO in PCL/PVP (SMCV-2.0) showed a 100% antibacterial rate againstEscherichia coli(E. coli).Keywords:nano-textured;Sc2O3-MgO;antibacterial;electrospinning
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产品关联
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2021
·
IF 3.785
Na Sun,Xuhui Wang,Xufeng Dong,Hao Huang,Min Qi
The application of the SiO 2 anodes for flexible and free-standing lithium-ion batteries (LIBs) is restricted by the weaknesses of SiO 2 nanoparticles , such as agglomeration, huge volume expansion and rapid capacity fading during charge/discharge cycles. Herein, the PVP-grafted-silica@carbon nanofibers (PVP-g-SiO 2 @CNF) flexible free-standing anode with high capacity and long cycle stability is successfully fabricated by PVP-grafted-SiO 2 , electrospinning and subsequent heat treatment . PVP modifies the interface between SiO 2 nanoparticles and electrospinning solution to prevent the nanoparticles from aggregation, which makes them are uniformly encapsulated in nanofibers. The uniform structure is beneficial to enhance the interface contact between SiO 2 and Li + , and alleviate volume expansion during lithiation . Furthermore, PVP introduces mesoporous into carbon nanofibers , facilitating the transports of ions and electrons to attain high-rate performance. As a flexible free-standing anode material for LIBs, PVP-g-SiO 2 @CNF achieves high reversible capacity, high-rate capacity and superior cycle stability (440 mAh g −1 at 0.1 A g −1 after 200 cycles), especially 89% capacity retention after 180° bending deformation . Consequently, enhanced capacity and cycle stability for flexible free-standing anode are available through PVP-grafted interface modification and electrospinning.
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Shiyue Ma,Hongyu Chen,Xin Du,Lu Liu,Yanfeng Zhang,Rongliang Ma,Yongqiang Wen,Meiqin Zhang
Background The development of level 3 features in various latent fingerprints (LFPs) is pivotal to improving the matching accuracy of damaged fingerprints. Among the various LFP development methods, the traditional ninhydrin method is widely employed in forensic science. However, it exhibits two key limitations: first, it is only effective for developing eccrine LFPs; second, it can only reveal level 2 features. These constraints compromise the extraction efficiency and utility of the developed fingerprints, thereby restricting the method's applicable scenarios. Results We report the fabrication of core (polyvinyl alcohol ninhydrin (PVA-ninhydrin))-sheath (polyvinyl pyrrolidone (PVP)) fibrous films by using coaxial electrospinning technology for high-level development of various LFPs. The film achieves safe, fast and chemical visualization of eccrine, sebaceous and natural LFPs with levels 1–3 features, showing a better visualization effect than ninhydrin solution and PVA-Nin fibrous film. It may be attributed to high specific surface area of thin film with uniform distribution of ninhydrin in the PVA core for high proportion of active sites of amino acids, which enables the film to have strong sweat adsorption and spreading properties. It further allows a more thorough and complete reaction between ninhydrin and the amino acids in the fingerprint residues that enhances the contrast of the developed photos. The statistical analyses of sweat pore count, ridge width, and pore spacing show high consistency and accuracy. Significant This study developed the core (PVA-ninhydrin)-sheath (PVP) fibrous films to achieve safe, fast and chemical visualization of eccrine, sebaceous and natural LFPs with levels 1–3 features and accurate quantitative analysis of the developed eccrine one. Moreover, even the interspacing and angles between sweat pores can be derived from level 3 features of the developed fingerprints. These results lay a robust foundation for subsequent fingerprint identification and personal recognition.
研究领域:
法庭科学
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材料科学
·
分析化学
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纳米技术
·
生物识别
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DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 34
·e202200543
·
IF 5.02
Zhuoran Ao,Youlan Zou,Haiyan Zou,Yuxing Huang,Nantao Chen
Graphical PEO-based Double-layer solid electrolyte was fabricated through casting method. PVP distributed into PEO layer contacting with cathode promotes the dissolution of lithium salts and forms lithium bonds with (LiPSs). The double-layer solid electrolytes can ameliorate the shuttle effect of LiPSs better than pure PEO electrolytes. Despite the high specific capacity of Li−S battery, shuttle effect of lithium polysulfides (LiPSs) and safety issue pose a great challenge to realize its commercial application. Replacing liquid electrolyte with poly (ethylene oxide) (PEO) -based solid-state electrolyte is considered as a promising method to boost the safety, but the shuttle effect of LiPSs cannot be completely eliminated. In this work, a new kind of double-layer PEO-based polymer electrolyte is designed to restrict the LiPSs. The layer next to cathode consists of PEO and poly(vinylpyrrolidone) (PVP). The other layer consists of PEO. PVP with abundant of amide groups has been proved to have strong affinity to LiPSs. The strong interaction between LiPSs and carbonyl groups in amide is verified by Attenuated Total Reflection-Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy tests. As a result, the assembled Li−S battery exhibits a specific capacity of 1100 mAh g −1 and capacity retention of 347 mAh g −1 after 200 cycles at 60 °C and 0.05 C, while the capacity retention of the battery without PVP-blended PEO electrolyte remains only 27 % at the same conditions.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
IONICS
·
2026
·
IF 3.4
Lin Liyang,Shi Benrun,Wang Tingbo,Wang Yan,He Yituan,Wei Zhen
Poly(ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs) are highly attractive for lithium metal batteries, yet their practical viability is fundamentally plagued by sluggish Li + transport, heterogeneous Li deposition, and the severe agglomeration of nanofillers. Herein, we propose a facile “dual-filler synergistic” strategy to architect high-performance SPEs by simultaneously integrating graphene oxide (GO) nanosheets and non-ionic polyvinylpyrrolidone (PVP) into the PEO-LiTFSI matrix. The hydrophobic groups of PVP are anchored onto GO surfaces to construct a polymeric steric layer, synergistically suppressing PEO crystallinity and accelerating lithium salt dissociation. Benefiting from the dual modulation, the GO/PVP-modified PEO electrolyte (GPP SPE) exhibits an ionic conductivity of 4.1 × 10 −4 S cm −1 and a Li + transference number of 0.57 at 60 o C, coupled with a broadened electrochemical stability window of 4.75 V. Consequently, GPP SPE exhibits superior dendrite suppression, enabling symmetric Li||Li cell to cycle stably for over 1000 h at 0.1 mA cm −2 without short-circuiting. Furthermore, the assembled LiFePO 4 ||Li all-solid-state cells exhibit a high initial discharge capacity of 151.1 mAh g −1 at 0.5C and retain 80.44% capacity after 200 cycles. This study elucidates a scalable and robust paradigm for designing high-safety, high-performance solid-state electrolytes for next-generation energy storage.
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DOI
高影响因子
危险品化学品经营许可证（带存储）