Soft Matter
·
2019
·Vol. 16
·期 1
·132-141
·
IF 3.399
Yangjie Xu,Jiulong Zhao,Zhilun Zhang,Jing Zhang,Mingxian Huang,Shige Wang,Pei Xie
In this study, sodium alginate (ALG)/poly dopamine (PDA)–polyvinylpyrrolidone (PVP) nanocomposites was synthesized via a one-step electrostatic spraying method. The spinning solution of ALG and dopamine was electrostatically sprayed into an alkaline solution of PVP, calcium chloride and tris buffer (pH = 8.5), in which the gelation of ALG and the polymerization of dopamine could be simultaneously triggered. PDA hence produced possesses a high photothermal conversion efficiency, while the PVP that was facilely conjugated onto the surface of nanocomposites improves the colloidal stability and compatibility of the material. Moreover, the ALG renders the nanocomposite excellent drug (doxorubicine, DOX) loading capacity. Promisingly, the temperature increment during the PTT process could promote the DOX release, thus enhancing its therapeutic effect. The in vitro/in vivo biosafety and tumor treatment experiments further corroborate that the ALG/PDA–PVP nanocomposites have remarkable biocompatibility and synergism for tumor hyperthermia and chemotherapy. Consequently, such a one-step electrospray strategy provides a new way for designing nanomaterials and is expected to significantly promote the development of organic photothermal therapeutic agents with excellent bio-compatibility.
研究领域:
生物医学工程
·
纳米医学
·
癌症治疗
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 8
·2042
·
IF 5.076
Dan Liu,Yaxin Zhao,Zhuqing Yan,Zhidong Zhang,Yanjun Zhang,Peng Shi,Chenyang Xue
In recent years, the preparation of flexible thermoelectric generators by screen printing has attracted wide attention due to easy processing and high-volume production. In this work, we propose an n-type Ag2Se/polymer polyvinylpyrrolidone (PVP) film based on screen printing and investigate the effect of PVP on thermoelectric performance by varying the ratio of PVP. When the content ratio of Ag2Se to PVP is 30:1, i.e., PI30, the fabricated PI30 film has the best thermoelectric property. The maximum power factor (PF) of the PI30 is 4.3 μW·m−1·K−2, and conductivity reaches 81% of its initial value at 1500 bending cycles. Then, the film thermoelectric generator (F-TEG) fabricated by PI30 is tested for practical application; the output voltage and the maximum output power are 21.6 mV and 233.3 nW at the temperature difference of 40 K, respectively. This work demonstrates that the use of PVP combined with screen printing to prepare F-TEG is a simple and rapid method, which provides an efficient preparation solution for the development of environmentally friendly and wearable flexible thermoelectric devices.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2016
·Vol. 42
·期 6
·6181-6190
·
IF 1.833
Wang Meng-Meng,Liu Shi-Wei,Li Lu,Yu Shi-Tao,Xie Cong-Xia,Song Zhan-Qian
Rosin hydrogenation using polyvinylpyrrolidone (PVP)-stabilized Pd colloidal nanoparticles as catalyst in an aqueous/organic biphasic system was investigated. The influence of preparation methods on the size of Pd nanoparticles for hydrogenation of rosin was marked. Compared with traditional catalysts Pd/C and Raney-Ni, PVP-stabilized Pd colloidal nanoparticles showed excellent catalytic activity and promoted formation of the product tetrahydroabietic acid (THAA). More than 93 % rosin was hydrogenated, and the mass fraction of THAA was 54.2 % when the reaction was carried out at 160 °C for 4 h. It was also found that PVP-stabilized Pd colloidal nanoparticles exhibited good reusability for hydrogenation, with no obvious decrease in catalytic performance when reused six times.
研究领域:
催化化学
·
纳米材料
·
有机合成
·
绿色化学
·
胶体化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2026
·
IF 2.8
Sun Hehang,Li Bowen,Tian Hui,Hou Jiao,Wang Xinwei,Wu Jiandong,Fen Yajuan,Wang Beiping,Hou Chunping
The nano-silicon waste produced by photovoltaic/Si-wafer cutting processes (e.g., diamond-wire sawing kerf waste) possesses extremely high recycling value, and converting it into commercial lithium-ion battery anodes holds great research significance. In this study, we pretreated silicon waste to remove excess impurities and prepared polyvinylpyrrolidone (PVP)- and NaCl-coated Si@C negative electrode materials using simple ball-milling and heat treatment processes. The carbon coating improved the electrochemical performance of the silicon waste. The Si@C-1:1:3 negative electrode with a composition ratio of 1:1:3 exhibited enhanced electrochemical performance. When cycling at 0.5 A g −1 for 300 cycles, the charge-specific capacity remained stable at 810.6 mAh g −1 , with a capacity retention rate of 63.1%. At high current density (3 A g −1 ), the material demonstrated significant rate performance, with capacity of 590.6 mAh g −1 . Due to the formation of stable structural carbon shell material by PVP carbonization, the material capacity was improved; at the same time, a small amount of nitrogen was added to enhance Li + transmission efficiency, and the surface generated a stable dendritic carbon layer to provide more transmission sites for Li + , which significantly improved the conductivity and capacity characteristics. This work provides a simple and feasible method for preparing lithium-ion battery anodes from silicon waste.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yong Qian,Chenling Huang,Rong Chen,Shizhen Dai,Chunyan Wang
A composite of well dispersed MnO 2 nanoparticles adhered on multi-walled carbon nanotubes (MnO 2 @MWNT) is obtained through facile hydrothermal process and followed by high temperature annealing. The nanoscale MnO 2 particles were homogeneously distributed on the surface of MWNTs under polyvinyl pyrrolidone (PVP)-assisted reaction. The MnO 2 @MWNT composite (34.43 wt. % MnO 2 ) displays a high specific capacitance of 285.12 F/g at a current density of 1 A/g in 1 M Na 2 SO 4 electrolyte. The electrode exhibits good cycling stability, which the specific capacitance retention retains up to 90.17% after 1000 cycles at 1 A/g.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Cell Reports Physical Science
·
2023
·
IF 8.9
Xiaodan Zhu,Jiguang Li,Baiyi Zu,Lianggen Zhong,Da Lei,Wenfei Ren,Fangfang Xiao,Xincun Dou
The enhancement of individual marking performance of taggants remains a challenge for special character tracking even after decades of development. Here, a method based on the polyvinyl pyrrolidone (PVP) functionalization of upconversion nanoplates (UCNPs) to improve the interaction between the taggant and skin is reported. It is shown that the molecular weight of the PVP used to decorate the surface of stacked Fe 3+ -doped NaBiF 4 :Yb/Er UCNPs (Fe-UCNPs) plays a critical role in enhancing taggant marking performance. This can be attributed to the strong noncovalent interactions between the functionalized UCNPs and skin which facilitated surface adhesion as well as the effective chemical penetration concentrated in the limited depth of the stratum corneum due to the long polymer chain and the μm-size-induced blocking of the UCNPs. We believe that these results may shine light on the exploration of individual marking taggants and may help promote the practical application of fluorescent taggants for special character tracking.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Nanoscale
·
2018
·Vol. 11
·期 3
·1286-1294
·
IF 7.233
Yulian Li,Lingyun Feng,Wei Yan,Irshad Hussain,Li Su,Bien Tan
Copper nanoclusters (CuNCs) exhibit susceptibility to oxidation in the subnanometer size range. In this work, a facile and green protocol is reported for the successful synthesis of water soluble CuNCs, with poly(vinylpyrrolidone) as a template and ascorbic acid as a mild reducing agent. The as-prepared CuNCs exhibit a green fluorescence and high quantum yield (QY = 44.67%) in water, which is the highest among the reported water soluble CuNCs. The origin of their highly luminescent nature was also investigated. In addition, the obtained CuNCs show good tolerability to high ionic strength, superior antioxidation properties, good photostability, time-stability, a large Stokes shift and ultralow cytotoxicity, laying the foundation for living cell imaging in THP-1 macrophages. A bright green fluorescence can be observed from the cells, indicating the potential practicality of CuNCs as a fluorescence marker in bioapplications. Interestingly, the as-prepared CuNCs exhibit a good selective fluorescence quenching response towards trinitrophenol over other nitro compounds. Furthermore, CuNCs were employed for sensing trinitrophenol based on the inner filter effect. A good linear relationship was obtained in the low concentration range of trinitrophenol, with a limit of detection of 3.91 × 10−7 M in aqueous medium. This result suggests the potential application of CuNCs as a probe in sensing and monitoring toxic trinitrophenol in the field of environmental security.
研究领域:
纳米技术
·
材料科学
·
分析化学
·
生物医学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Artificial Cells Nanomedicine and Biotechnology
·
2017
·
IF 5.605
Min Hu,Chenwen Li,Xin Li,Min Zhou,Jianbin Sun,Fangfang Sheng,Sanjun Shi,Laichun Lu
The anti-infection ability and skin regeneration are important aspects on the progress of wound healing, which needs an ideal wound dressing that not only resists bacteria but also promotes skin regeneration. In this study, zinc oxide/silver/polyvinylpyrrolidone/polycaprolactone (ZnO/Ag/PVP/PCL) nanofibres were prepared through electrospinning. Firstly, zinc oxide nanoparticles (ZnONPs) and silver nanoparticle (AgNPs) were synthesized respectively. Secondly, the two nanoparticles were mixed with polyvinylpyrrolidone (PVP) and polycaprolactone (PCL) to obtain the nanofibres. The results of scanning electron microscopy (SEM) showed that ZnONPs and AgNPs were 40.07 ± 9.70 nm and 37.46 ± 12.02 nm, respectively. After electrospinning, the nanofibres were 368.22 ± 123.96 nm in diameter. Infrared spectroscopy revealed that ZnONPs/AgNPs bimetallic nanomaterials were physically embedded in the nanofibres. The antibacterial effects against Staphylococcus aureus and Escherichia coli of ZnO/Ag/PVP/PCL nanofibres were significantly better than these of the single metal material-loaded nanofibres. More importantly, the combination of ZnO and Ag reduced the cytotoxicity of ZnO/Ag/PVP/PCL bimetallic nanofibres toward fibroblasts. These findings demonstrated that ZnO/Ag/PVP/PCL bimetallic nanofibres should be of greater interest than the single metal nanomaterial-loaded nanofibres in inhibiting growth of bacteria.
研究领域:
材料科学
·
纳米技术
·
生物材料
·
伤口愈合
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 32
·16731-16738
·
IF 3.708
Yuanyuan Zhou,Pengwei Qi,Zhihua Zhao,Qian Liu,Zhongjun Li
Fibrous composites of hydroxyapatite (HAP)/polyvinylpyrrolidone (PVP)/polyethylene oxide (PEO) with good mechanical properties were successfully prepared by a sol-electrospinning process. As HAP nanoparticles could not disperse well in polymer aqueous solution, a modified procedure was presented to firstly prepare HAP sol. The PVP and PEO polymers were then directly dissolved in the HAP sol solution for electrospinning, which was based on completely miscible solutions. The morphology and structure of the electrospun fibrous composites were investigated by XRD, SEM, TEM and FTIR. It was of interest to observe that large numbers of HAP nanoneedles were preferentially oriented parallel to the longitudinal direction of the electrospun PVP–PEO nanofibers when a relatively small amount of HAP was used. When there was a large amount of HAP, the agglomeration of needle-like HAP particles could stretch out of the fibers. This could reduce the electrical charge carried by the liquid jet, and make some agglomerated HAP particles randomly arrange on the edge of the jet, with the result that some protuberances existed on the surface of the fibers. Mechanical testing demonstrated that the incorporation of HAP into the PVP–PEO matrix led to significantly better tensile properties compared to those of the pure electrospun polymer membrane, and the incorporation of 60 wt% HAP into the matrix of PEO–PVP nanofibers led to a higher tensile strength of 19.20 ± 0.09 MPa and a percentage of elongation of 11.64 ± 0.31%, respectively. Based on the study, the combination of PVP–PEO and HAP could be promising for application as scaffolds for bone tissue engineering.
研究领域:
生物材料
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
Applied Sciences-Basel
·
2021
·Vol. 11
·期 23
·11094
·
IF 2.679
Shanshuai Lu,Congling Li,Rui Liu,Aifeng Lv
Particulate matter (PM), composed of tiny solids and liquid droplets in polluted air, poses a serious threat to human health. Traditional air filters usually cause secondary pollution due to their poor degradability. Here, shellac, as an environmentally friendly natural organic material, was successfully applied to fabricate biodegradable air filters. Since pure shellac fiber shows poor mechanical properties and bad light transmittance, we then introduced a small amount of polyvinylpyrrolidone (PVP) in the shellac solution to prepare highly efficient air filter membranes by the electrospinning method. The prepared PVP-assisted shellac nanofiber membrane (P-Shellac FME) demonstrated improved filtration efficiencies as high as 95% and 98% for PM2.5and PM10, respectively. The P-Shellac FME also showed good stability, with filtration efficiencies still above 90% and 95% for PM2.5and PM10even after six hours of air filtering under high PM concentrations. The pressure drop going through the filter was only 101 Pa, which is also comparable to the value of 76 Pa obtained using commercial polypropylene nanofibers (PP nanofibers, peeled off from the surgical mask), indicating good air permeability of P-Shellac FME. Additionally, P-Shellac FME also showed the advantages of translucence, biodegradability, improved mechanical properties, and low cost. We believe that the P-Shellac FME will make a significant contribution in the application of air filtration.Keywords:shellac;nanofiber;air filtration;electrospinning method;biodegradability;translucence
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
Foods
·
2021
·Vol. 10
·期 8
·1728
·
IF 4.35
Peng Wen,Teng-Gen Hu,Yan Wen,Ke-Er Li,Wei-Peng Qiu,Zhi-Lin He,Hong Wang,Hong Wu
An ethyl acetate extract from ofNervilia fordii(NFE) with considerable suppression activity on lipid peroxidation (LPO) was first obtained with total phenolic and flavonoid contents and anti-LPO activity (IC50) of 86.67 ± 2.5 mg GAE/g sample, 334.56 ± 4.7 mg RE/g extract and 0.307 mg/mL, respectively. In order to improve its stability and expand its application in antioxidant packaging, the nano-encapsulation of NFE within poly(vinyl alcohol) (PVA) and polyvinyl(pyrrolidone) (PVP) bio-composite film was then successfully developed using electrospinning. SEM analysis revealed that the NFE-loaded fibers exhibited similar morphology to the neat PVA/PVP fibers with a bead-free and smooth morphology. The encapsulation efficiency of NFE was higher than 90% and the encapsulated NFE still retained its antioxidant capacity. Fourier transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD) analysis confirmed the successful encapsulation of NFE into fibers and their compatibility, and the thermal stability of which was also improved due to the intermolecular interaction demonstrated by thermo gravimetric analysis (TGA). The ability to preserve the fish oil’s oxidation and extend its shelf-life was also demonstrated, suggesting the obtained PVA/PVP/NFE fiber mat has the potential as a promising antioxidant food packaging material.Keywords:electrspinning;Nervilia fordiiextract;nano-encapsulation;antioxidant activity
研究领域:
食品科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yingge Zhang,Hongfen Li,Xiaolei Zhang,Hanfang Zhang,Wang Zhang,Hongwei Huang,Hongling Ou,Yihe Zhang
The exploration of novel nanomaterials to resolve the issues of water pollution with the aid of photocatalytic technology has always been a research hotspot. MoS 2 is acknowledged to be one of the promising photocatalysts for its interesting layered structure, suitable band gap, and good chemical stability. However, the fast recombination of photogenerated electrons and holes within the MoS 2 impedes its extensive application. Here, hydrophilic polymer (polyvinyl pyrrolidone, PVP) and sulfur vacancy (Vs) are simultaneously introduced into the MoS 2 nanosheets to achieve high-efficient photocatalytic hexavalent chromium Cr(VI) removal and antibacterial performance. The incorporation of PVP greatly enhances the adsorption capacity of MoS 2 , and creating Vs essentially strengthens the photogenerated carrier separation of MoS 2 . As a result, the Cr(VI) removal efficiency of MoS 2 -PVP with an appropriate Vs concentration is up to 99.5 % for 3 h. Meanwhile, MoS 2 -PVP with a relatively higher Vs concentration displays a superior Escherichia coli (E. coli) removal efficiency of 91.8 % within 30 min with the initial E. coli concentration of ∼1.0 × 10 7 CFU/mL. This study extends photocatalysts to a higher level in designing advanced materials for environmental remediation and establishes a feasible platform for emphasizing the versatility of defect engineering in regulating catalytic activity.
研究领域:
环境科学
·
纳米技术
·
材料科学
✓ 已验证
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）