TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Changhong Lai,Song Wang,Pian Zhong,Yanyan Chen,Juan Xu,Xiaoli Li,Weiqiang Liu
Vascular interventional catheters are generally made of hydrophobic polymers , which may lead to vascular injury, poor lubrication and other consequences due to friction with vascular wall or stent in the process of intervention. In this study, the PDA-PVP/PEG composite coating was prepared based on common TPU catheter material to improve its hydrophilic lubrication behavior. Firstly, the oxidative self-polymerization of dopamine (PDA) was initiated and deposited on the surface of TPU in a weak alkali environment, and then the PVP/PEG coating was prepared by UV curing with PDA as the intermediate adhesion layer . The composite coating was optimized step by step by lubricating material system, process parameters, molecular weight , and concentration. Compared with the blank control group, the water contact angle decreased from 91.3° to about 28.3°, and the friction coefficient decreased from 0.4 to about 0.03, and the composite coating was not damaged after 30 min of reciprocating sliding. The results of cytotoxicity grade Level 1 and hemolysis rate less than 5 % also proved that the composite coating showed good cytotoxicity and blood compatibility. In summary, the PDA-PVP/PEG hydrophilic lubricating composite coating revealed excellent comprehensive properties.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Xianghua Wu,Xing Yang,Hu Yang,Zeping Guo,Jinpei Lin,Wei Wu,Xiaoguang Liang,Yun He
Composite fibers synthesized via the electrospinning technique have been extensively investigated as the adsorbent for the volatile organic compounds (VOCs) because of their synergistic effect . Herein, the novel hierarchically structured polyvinylpyrrolidone (PVP) porous fibers embedded with microporous NaY zeolite are fabricated by employing the electrospinning method . The parameters such as the electrospinning voltage and flow rate as well as the particle sizes of NaY zeolite are optimized further for the preparation of composite fibers featured with homogeneous morphology and superior property. Consequently, the composite fibers with large specific area synthesized under the optimized process present an excellent benzene adsorption capacity of 667 mg/g, which can be attributed to synergistic effect originated from the hierarchical structure configured with porous PVP and microporous NaY zeolite. Our work does not only demonstrate the promising potential of the as-fabricated composite fibers for VOCs due to its advantages of low cost and large-scale production, but also provides valuable insights into the design and utilization of zeolite/polymer composite fibers for practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Xinyu Zhang,Xuan Zhou,Quan Wan,Taolei Sun,Guanbin Gao
Prussian blue analogue nanozymes (PBANZs) have been widely employed in the colorimetric detection of various organic small molecules due to their peroxidase-like activity. However, the practical applications of PBANZ are limited by its narrow operating pH range, insufficient catalytic activity, and poor stability. In this study, we synthesized a novel Cu 2 Fe(CN) 6 @PVP PBA nanozyme (Cu-PBANZ) using polyvinylpyrrolidone (PVP) as a capping ligand. This novel Cu-PBANZ not only exhibited enhanced peroxidase-like activity and improved stability under near-neutral conditions but also demonstrated higher sensitivity and a broader linear range in the detection of hydrogen peroxide (20–4000 μM, LOD 5 μM) and ascorbic acid (10–2000 μM, LOD 3.9 μM). Besides, a smartphone-based platform was developed for detecting AA content in fruits, achieving a detection limit of 7.8 μM. Both UV–Vis spectrophotometry and smartphone-based colorimetry were validated with recovery rates of 95.1 %–106.7 % and 94.8 %–108.9 %, respectively. This study proposed a promising biosensor incorporating Cu-PBANZ for rapid colorimetric detection of AA in fruits using a smartphone.
研究领域:
生物化学
·
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2024
·
IF 3.6
Min Xiao,Zifeng Wang,Yanru An,Yingqi Dai,Xinghao Wang,Zhigang Zhu
Microneedles offer minimally invasive, user-friendly, and subcutaneously accessible transdermal drug delivery and have been widely investigated as an effective transdermal delivery system. Ibuprofen is a common anti-inflammatory drug to treat chronic inflammation. It is crucial to develop microneedle patches capable of efficiently delivering ibuprofen through the skin for the effective treatment of arthritis patients requiring repeated medication. In this study, the mechanical properties of a new type of polymer microneedle were studied by finite element analysis, and the experimental results showed that the microneedle could effectively deliver drugs through the skin. In addition, a high ibuprofen-loaded microneedle patch was successfully prepared by micromolding and subjected to evaluation of its infrared spectrum morphology and dissolve degree. The morphology of microneedles was characterized by scanning electron microscopy, and the mechanical properties were assessed using a built linear stretching system. In the in-vitro diffusion cell drug release test, the microneedle released 85.2 ± 1.52% (210 ± 3.7 μg) ibuprofen in the modified Franz diffusion within 4 h, exhibiting a higher drug release compared to other drug delivery methods. This study provides a portable, safe and efficient treatment approach for arthritis patients requiring daily repeated medication.
研究领域:
药剂学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 302
·期 3
·355-362
·
IF 2.4
Han Fei,Cao Mei,Lin Jiali,Liu Ting,Zhu Xiaoyun,Zhang Yan
The stability and dispersion of Copper (Cu) powders in an aqueous medium impacts their performances. Thus the Cu powder suspensions were prepared by adding different stabilizers—sodium dodecyl sulfate (SDS), sodium dodecylbenzene sulfonate (SDBS), polyvinyl pyrrolidone (PVP), and hexadecyl trimethyl ammonium bromide (CTAB); the best surfactant was selected and its stability and dispersion were studied. The study systematically examined the effect of the stability of suspensions via sedimentation analysis, including solid–liquid ratio, the concentration of stabilizer, and dispersion time. The particle size, the stability of suspensions, phase composition, and microstructure of Cu powders were characterized by laser particle size analyzer, zeta potential, X-ray diffraction (XRD), transmission electron microscope (TEM), and scanning electron microscope (SEM). The results indicate that the stability of the suspension is improved with the addition of PVP due to the steric hindrance of PVP, and the growth and agglomeration of particles are retarded by the formation of a thick hydration layer with the optimizing concentrations, dispersion time, and solid–liquid ratio 10 g/L, 30 min, and 1:25, respectively.
研究领域:
材料科学
·
化学工程
·
纳米技术
·
物理化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 5
·2789-2799
·
IF 1.938
Fahad Shah,Yu Haojie,Wang Li,Wang Yang,Lin Tengfei,Amin Bilal Ul,Naveed Kaleem-Ur-Rahman,Khan Rizwan Ullah,Mehmood Sahid,Haq Fazal,Xing Yusheng,Usman Muhammad
High molecular weight polyvinylpyrrolidone (PVP) and seeding conditions are considered to have important roles in the synthesis of AgNWs. In this work, we report a versatile synthesis of AgNWs in a salt-free environment and under Ar inert atmosphere using high molecular weight PVP and seeding step during the synthetic process. The high molecular weight PVP was found to efficiently promote the preparation of AgNWs via supporting the proper growth control of AgNWs on {111} facets and selective growth on {100} facets. The seeding step facilitates the formation of seeds such as multiple twinned nanoparticles (MTPs) and single crystal seeds, which promoted the feasible formation of AgNWs. The shape and size of the synthesized AgNWs were characterized by SEM and TEM. The crystalline nature of the synthesized AgNWs was characterized by HRTEM, SAED and XRD, and their LSPR peaks were confirmed by UV-Vis spectroscopy. The conductive properties of the synthesized AgNWs were determined by preparing their thin conductive film on a PET substrate. The prepared AgNWs thin films exhibited good sheet resistance.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Defence Technology
·
2021
·
IF 3.172
Fuwei Li,Yue-ting Wang,Cheng-ai Wang,Yun Shen,Ze-hua Zhang,Jian Cheng,Shuang-zhang Wu,Ying-hua Ye,Rui-qi Shen
The core-shell metastable intermolecular composites (MIC) have attracted much attention in the past few years due to their unique properties. Here, the preparation of Al-Core heterojunction fibers using PVP as a template is proposed. The nano-Al was directly added to the precursor solution of cupric acetate monohydrate (CAM)/Polyvinylpyrrolidone (PVP), and the initial Al@CAM/PVP fibers were obtained via electrospinning. The core-shell MIC fibers are then obtained by calcining the initial fibers. The morphology, structure, and composition of Al-core MIC fibers were characterized, that the energetic fibers calcined at 300 °C, 350 °C, and 400 °C have a core-shell structure with shell compositions Cu x O and PVP, Cu x O and CuO, respectively. The energy release characteristics of Al-core MIC were investigated, and preliminary ignition tests were performed using an ignition temperature measuring instrument and a pulsed laser. The energetic fibers calcined at 300 °C exhibited unique properties. The decomposition of PVP in the shell layer promoted exotherm, and a low-temperature exothermic peak was shown at 372–458 °C. Lower ignition temperatures and higher flame heights were observed in the combustion tests than calcination at 350 °C and 400 °C. An unexpected result was that PVP can play a positive role in Al/CuO nanothermites. Simultaneously, this preparation method provided an idea for the integrated preparation of core-shell Al-Core MIC fibers and tuning the properties of MIC.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2021
·Vol. 28
·期 3
·1-11
·
IF 3.097
Yang Jiafei,Shang Jingqi,Chen Jiewei,Xue Feng,Ke Zunye,Zhang Xiangfen,Ding Enyong
In this study, a simple method was used to synthesize a new type of magnetic composite material BNNS@ Fe 3 O 4 . In the PVP aqueous solution, the h-BN surface was exfoliated by a high-pressure homogenizer to obtain a few layers of BNNS. Then FeCl 3 ·6H 2 O and hydrazine hydrate were added for reduction treatment, and deposited Fe 3 O 4 nanoparticles on the surface of BNNS. PVP can not only stabilize a few layers of BN, but also promote the formation of Fe 3 O 4 . Through SEM, TEM, XRD, XPS and other characterization methods, the composition and surface morphology of the composite material were determined. Furthermore, the adsorption of Congo red by the composite material was explored. The removal rate of Congo Red by composite of BNNS @ Fe 3 O 4 (0.1) was 39% after 12 h reaction at 323 K. But adsorption capacity also increased with time, when the time was extended to 48 h, its maximum removal rate of Congo Red was 83% and the adsorption capacity was 499 mg/g at 313 K. The adsorption kinetics and thermodynamics of the composite material for Congo red at 313 K were studied. The adsorption process was more consistent with the pseudo-second-order kinetic equation. The composite nanoparticles can move directionally under the action of a magnetic field, which also has potential application value in thermal conductivity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2014
·
IF 3.96
Wan-Zhong Lang,Xuan Zhang,Jian-Ping Shen,Hai-Peng Xu,Zhen-Liang Xu,Ya-Jun Guo
The impact of chemical treatment on the poly(vinylidene fluoride)/perfluorosulfonic acid (PVDF/PFSA) hollow fiber ultrafiltration membranes in acid, alkali and hypochlorite solutions was contrastively studied with PVDF/polyvinylpyrrolidone(PVP) ultrafiltration membranes. The morphologies, surface properties, permeation performances, antifouling ability and mechanical properties of the membranes were characterized by numerous state-of-the-art analytical techniques. The results reveal that the chemical treatment has less effect on the PVDF/PFSA membranes than on the PVDF/PVP membranes. After treating with alkali and hypochlorite solutions, the surface hydrophilicity of PVDF/PFSA membranes increases, while the surface hydrophilicity of PVDF/PVP membranes decreases. In comparison with the original membranes, the antifouling ability of the PVDF/PFSA membranes is improved, while the antifouling ability of the PVDF/PVP membranes declines. Compared with the chemically treated PVDF/PVP membranes, the treated PVDF/PFSA membranes are more easily regenerated after fouling. The chemical treatments lead to the decline of the mechanical strength in different degrees for both PVDF/PFSA and PVDF/PVP membranes. Nevertheless, this influence on PVDF/PFSA membranes is evidently less severe than on PVDF/PVP membranes.
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
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ningkuan Zhong,Weiyi Wu,Fen Xu,Lixian Sun,Yi Wu,Jianhao Lao,Xiaohui Qin,Yu Wang,Xiangpeng Ding,Aicheng Peng,Jincheng Liu,Dingding Yuan
In this work, a flower-like porous Ni-MOF BDC @C (MOFs@C SP ) has been synthesized successfully on carbon material through two surfactants (SDS and PVP) control by means of a facile solvothermal method. SEM results reveal that the MOFs@C SP is the porous material that bends and folds into the flower shape of Ni-MOF nano sheets orientated grown on the carbon materials. The results also illustrate that the carbon material plays the role of template and conductive reinforcing agent. Under the action of carbon and double surfactants, the MOFs@C SP has the highest specific capacity and the lowest resistance of charge transfer in the four Ni-MOF BDC materials (namely MOFs@C SP , MOFs@C P , MOFs@C S and Ni-MOF BDC ). That is the specific capacity of MOFs@C SP is 1350.1 F g -1 at 1 A g -1 , corresponding to resistance of charge transfer of 0.3 Ω. Moreover, the energy density of the asymmetric device assembled by MOFs@C SP is 42.9 Wh kg -1 under 813.1 W kg -1 .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Xingying Zhang,Ben Liu,Chenglong Hu,Shaoyun Chen,Xueqing Liu,Jiyan Liu,Fang Chen,Jian Chen,Fangyan Xie
Silver nanowires (i.e., AgNWs) can act as effective surface-enhanced Raman spectroscopy (i.e., SERS) substrates to detect small molecules. However, a lot of prepared AgNWs were often wrapped by polyvinylpyrrolidone (i.e., PVP) thin film to form an insulating layer to produce ill-defined AgNWs-PVP-AgNWs interface, limiting the plasmonic coupling among the stacked AgNWs. Herein, we reported a facile method in removal of PVP ligands from AgNWs for high performance and reusable SERS substrate. Sodium borohydride (NaBH 4 ) was used to completely remove the PVP ligands from the surface of AgNWs and produce a clean AgNWs-AgNWs interface that effectively enhances the localized surface plasmon resonance (i.e., LSPR) was produced, greatly improving the SERS activity of the AgNWs thin film. The SERS detection of rhodamine 6G (i.e., R6G) used with PVP AgNWs and without PVP AgNWs is 1.0 × 10 -9 and 1.0 × 10 -15 M, and the average enhancement factor ( EF ) is about 0.86 × 10 4 and 9.35 × 10 4 , respectively. Moreover, the recyclable behavior of the AgNWs with several analyte molecules is much more interesting than that of the PVP@AgNWs. The SERS detection of AgNWs for R6G, the 3-mercaptopropionic acid (i.e., 3-MPA) and melamine with good recyclability in nanomolar and millimolar concentration can be easily detected.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2025
·Vol. 15
·期 3
·267
·
IF 2.8
Junyu Liu,Hansheng Li,Wencan Cui,Shihua Sang,Liang Guan,Chen Zhao
This study focuses on the preparation of a highly active surface-enhanced Raman spectroscopy (SERS) substrate, where Ag nanoparticles synthesized by the Lee–Meisel method are loaded onto the surface of GO@PVP nanoparticles through classical electrostatic attraction. The substrate was characterized by SEM and XPS analysis. The SERS-active substrate was utilized for the detection of phenanthrene in aqueous solutions, achieving a detection limit of 10−8g/L (5.6 × 10−11mol/L). In comparison to conventional Raman spectroscopy, this method exhibits a significant reduction in the detection limit and holds promise for trace polycyclic aromatic hydrocarbons (PAHs) monitoring in environmental samples.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）