INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Jingyi Hu,Yihua Xu,Xiaolu Ma,Weitong Hu,Yunting Zhang,Yuxian Ye,Shengfei Yang,Hangjuan Lin,Xiaoxia Sheng,Jiahe Wu,Tianyuan Zhang,Jianqing Gao
Hair-related disorders are currently widely concerned issues for not only the scientific society but also the public attentions. Microneedle-based drug delivery system has been regarded as a promise hair follicle-targeted drug delivery approach, largely because they can effectively penetrate the stratum corneum barrier and deliver drugs to hair follicles within dermis. However, the currently reported microneedles for treating hair-related disorders usually rely on rigid backings, showing poor adaptability to the curved scalp and thereby restricting their usability for hair follicles targeted drug delivery. To this end, this study utilized sodium alginate and polyvinylpyrrolidone to construct a scalp-curvature-conforming microneedle with flexible backing. Subsequently, Psoralea corylifolia extract (PE) was loaded into the microneedles to investigate its capability in delivering PE to the hair follicle site for treating leukotrichia associated with vitiligo. These PE-loaded microneedles can effectively conform to the curvature of skin, enhancing the efficiency of microneedle insertion and ensuring stable drug delivery. Moreover, animal studies demonstrate that the PE loaded microneedles can effectively penetrate the stratum corneum, benefiting the drug delivery to hair follicles located site, and consequently showing a successful inhibition of hair graying. In summary, the present study reports a design and preparation of scalp-curvature-conforming microneedle. This design may offer a potential solution for efficient drug delivery using microneedles to the curved skin.
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高影响因子
Journal of Marine Science and Engineering
·
2025
·Vol. 13
·期 3
·568
·
IF 2.8
Zaixiang Zheng,Shutong Wu,Haobo Shu,Qingzhen Han,Pan Cao
Marine biofouling is a major problem that contributes to the failure of man-made marine structures. Conventional marine antifouling coatings that release heavy metal ions for antimicrobial purposes are no longer in line with today’s environmental issues. In this paper, a layer-by-layer (LBL) self-assembled marine antifouling coating based on an addition reaction between polyvinylpyrrolidone (PVP) and phenols to anchor pyrogallic (PG) with an antimicrobial effect on stainless steel surfaces is presented. For this purpose, three phenolics were selected, and their antifouling effects were compared. Field emission scanning electron microscopy, contact angle measurement, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy analysis (FTIR) were used to thoroughly characterize the LBLPGs, and the results showed superior homogeneity of the coatings with no significant delamination. Simulated marine antifouling and friction tests showed that the coating inhibitedStaphylococcus aureus(S. aureus),Escherichia coli(E. coli), andPhaeodactylum tricornutum(P. tricornutum) by more than 90% and reduced the friction coefficient of the stainless steel surface from 0.38 to 0.24, demonstrating superior antifouling and friction resistance effects.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Tao Jiang,Feikai Zhu,Xintao Gao,Xiaochen Wu,Wenyong Zhu,Chuanlong Guo
Acute kidney injury (AKI) is a common clinical problem with no effective treatment. Excessive folic acid (FA) induced kidney tubular injury is characterized by oxidative stress and inflammation, and is a common model of AKI. The excellent pharmacological activity of naringenin (NAR) makes it a potential agent for treating AKI, but its poor solubility limits its application. This study prepared NAR loaded nanoparticles (FU/PVP-NAR) using fucoidan (FU) and polyvinylpyrrolidone (PVP) as carriers, with a particle size of 23.96 ± 2.77 nm. In vitro studies showed that FU/PVP-NAR inhibited excessive FA induced proliferation inhibition, accumulation of reactive oxygen species (ROS), and disruption of mitochondrial membrane potential (MMP) of HK-2 cells. Further confirmed that FU/PVP-NAR inhibited FA induced DNA damage and Cyclic GMP–AMP synthase (cGAS)-stimulator of interferon genes (STING) activation. In vivo studies showed that excessive FA induced AKI features in mice, such as elevated serum creatinine (SCr) and blood urea nitrogen (BUN) levels, accompanied by pathological damage to kidney tissues. The above AKI characteristics induced by FA were alleviated by FU/PVP-NAR. FU/PVP-NAR also inhibited the decrease in antioxidant enzyme levels in kidney tissues induced by FA. Furthermore, in vivo mechanism studies indicated that FU/PVP-NAR inhibited the release of inflammatory factors by inhibiting DNA damage-cGAS-STING pathway. In summary, this study provided the possibility for FU/PVP-NAR as a potential candidate drug for treating FA induced AKI.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Haoyuan Liu,Tianming Zhu,Jianping Liao,Zhen Ma,Xiaoxi Zuo,Junmin Nan
Traditionally, the combination of a porous separator and liquid electrolyte to realize efficient ion transport inside sodium-ion batteries has been considered to be prone to electrolyte leakage and short-circuit risk. In order to solve this difficulty, this paper designs the blending of “rigid” methyl cellulose (MC) and “flexible” polyvinylpyrrolidone (PVP) to prepare MC/PVP-M nonporous membranes. The “rigid” MC endows MC/PVP-M with high thermal stability and mechanical strength. The “flexible” PVP promotes MC/PVP-M high electrolyte uptake, high ionic conductivity (1.03 mS cm −1 ) and Na + transfer number (0.71) under the non-porous feature. In addition, the Na 3 V 2 (PO 4 ) 3 half-cell with MC/PVP-M nonporous membrane exhibits a high specific capacity of 108.2 mAh g −1 at 0.5C, and shows an enhanced initial specific capacity of 93.5 mAh g −1 at 3C with 93.5 % capacity retention after 600 cycles. These results show that this designed MC/PVP-M nonporous membrane has a promising prospects for application, and also provide a new idea for designing separators with high safety and high electrochemical performance.
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INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 11
·16551-16564
·
IF 5.164
Jiuqing Liu,Meng Liu,Cheng Wang,Qihou Li,Jie Li,Ya Chen,Zikun Hong,Feifei Song,Lishun Bai,Fanli Zeng
Summary The dissolution and diffusion of intermediate product polysulfide in lithium-sulfur battery (Li-S) between electrodes pose great challenge for the further application of Li-S batteries. Herein, we first prepared nano SiO 2 blending polyetherimide (PEI) separator modified with acetylene black/polyvinylpyrrolidone (PVP) coating layer. Joint effect of acetylene black and PVP on polysulfide contribute to outstanding cycle performance. The Li-S cell with CP55 separator presents superior cycle performance (650 mAh g −1 ) than the Li-S cells with the Celgard 2320 and PEI-4 separator after 200 cycles. In addition, the SiO 2 blending PEI separator modified with acetylene black/PVP coating layer for Li-S cells shows higher ionic conductivity (2.02 mS cm −1 ), excellent compatibility with lithium and better thermal stability. This work presents a convenient and economical strategy to alleviate polysulfide dissolution and the CP55 separator is a promising candidate for the further application of Li-S batteries.
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ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Hua Su,Dan-Dan Liu,Meng Zhao,Wei-Liang Hu,Shan-Shan Xue,Qian Cao,Xue-Yi Le,Liang-Nian Ji,Zong-Wan Mao
Polyvinylpyrrolidone-stabilized iridium nanoparticles (PVP-IrNPs), synthesized by the facile alcoholic reduction method using abundantly available PVP as protecting agents, were first reported as enzyme mimics showing intrinsic catalase- and peroxidase-like activities. The preparation procedure was much easier and more importantly, kinetic studies found that the catalytic activity of PVP-IrNPs was comparable to previously reported platinum nanoparticles. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) characterization indicated that PVP-IrNPs had the average size of approximately 1.5 nm and mainly consisted of Ir(0) chemical state. The mechanism of PVP-IrNPs′ dual-enzyme activities was investigated using XPS, Electron spin resonance (ESR) and cytochrome C-based electron transfer methods. The catalase-like activity was related to the formation of oxidized species Ir(0)@IrO2 upon reaction with H2O2. The peroxidase-like activity originated from their ability acting as electron transfer mediators during the catalysis cycle, without the production of hydroxyl radicals. Interestingly, the protective effect of PVP-IrNPs against H2O2-induced cellular oxidative damage was investigated in an A549 lung cancer cell model and PVP-IrNPs displayed excellent biocompatibility and antioxidant activity. Upon pretreatment of cells with PVP-IrNPs, the intracellular reactive oxygen species (ROS) level in response to H2O2 was decreased and the cell viability increased. This work will facilitate studies on the mechanism and biomedical application of nanomaterials-based enzyme mimic.
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Journal of Macromolecular Science Part B-Physics
·
2025
·
IF 1.4
Yaping Huang,Botian Zhu,Xuyang Feng,Hualin Zhang,Haoyou Jiang,Yongfang Qian,Ying Wang
The aim of our research reported in this paper was to develop electrospun (Sc2O3-MgO)/alizarin/polycaprolactone/polyvinylpyrrolidone nanofiber membranes with pH-responsive and antibacterial properties. Scanning electron microscopy results showed that alizarin (ALI) was uniformly distributed in the polycaprolactone/polyvinylpyrrolidone (PCL/PVP) matrix, forming pH-responsive membranes. The X-ray diffractometer (XRD), attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and thermal analysis results demonstrated that both ALI and Sc2O3-MgO loadings were effective. Moreover, the addition of 0.16 wt% ALI induced distinct color changes (from pale yellow to purple, pH = 2-12) in the ALI/PCL/PVP nanofiber membranes. This behavior stemmed from the hydroxyl group in ALI forming an intramolecular hydrogen bond with the carbonyl oxygen, enabling proton transfer. Furthermore, the ALI/PCL/PVP membranes containing 2.00 wt% Sc2O3-MgO showed good antibacterial effect against Escherichia coli (E. coli) within 24 h, of what indicating its strong antibacterial activity. In addition, a comprehensive 8-day analysis was conducted on the pH, total volatile basic nitrogen (TVB-N) and total number of live bacteria colonies of the shrimp, as well as the color changes in the film. The experiment proved that the shrimp not covered by the film became highly spoiled on the 4th day, while the shrimp covered with the SAPP-2-3 nanofiber membranes only reached a state of high spoilage on the 6th day. Therefore, the SAPP-2-3 nanofiber membranes can effectively extend the shelf life of the shrimp by 2 days. We believe this study provides a new strategy for the research of multifunctional smart food packaging films.
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RSC Advances
·
2015
·Vol. 5
·期 28
·21532-21543
·
IF 3.84
Xuan Zhang,Wan-Zhong Lang,Hai-Peng Xu,Xi Yan,Ya-Jun Guo
By introducing hydroxyapatite (HAP) nano whiskers as well as polyvinylpyrrolidone (PVP), poly(vinylidene fluoride) (PVDF)/PVP/HAP hollow fiber membranes were fabricated with the wet spinning method. The aqueous solution containing 90 wt% N-methyl-2-pyrrolidone (NMP) is used as bore liquid. The effects of two additives and the synergism on the morphologies, surface properties, permeation performances, antifouling ability and mechanical properties of the PVDF/PVP/HAP membranes were characterized by numerous state-of-the-art analytical techniques, and reasonably elucidated accompanying with precipitation kinetics and shear viscosity of dopes. The results show that with the addition of HAP, the finger-like structure of PVDF/PVP/HAP membranes is gradually suppressed and replaced by sponge-like structure, and the hydrophilicity is evidently improved. The hydraulic permeability Jw firstly increases from 224.2 of M-1 to 549.1 L M−2 H−1 bar−1 by adding 1.0 wt% HAP nano whiskers of M-2, and then decreases to 425.9 and 316.3 L M−2 H−1 bar−1 for M-3 and M-4. The rejections of three proteins and humic acid range from 31.4% to 98.4%, and slightly decrease as HAP content increases in the membranes. The mechanical properties of the membranes are markedly improved with the addition of HAP nano whiskers. The membranes containing dual additives have higher permeability and mechanical strength than those of the fibers containing either single additive, implying the synergism of them in improving membrane properties.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Lijuan Yang,Cheng Niu,Xiaoyin Cao,Yunjia Wang,Zhaoqi Zhu,Hanxue Sun,Weidong Liang,Jiyan Li,An Li
Air pollution has become a challenging environmental problem worldwide due to rapid industrial development and excessive emissions of vehicle exhaust. Herein, we report a preparation of conjugated microporous polymer membranes (CMPM) with a hierarchical porous structure by electrospun polyvinylpyrrolidone (PVP) nanofibers as a template for effective removal of PM from airborne and vehicle exhaust. CMP membranes have hierarchical holes, where the macropores are from electrospun nanofiber membranes and the mesopores are from polymer synthesis. Taking advantage of its inherent physicochemical and thermal stability and hierarchical hole characteristics, the CMPM-based filter can work continuously for up to 36 h and still maintains a high removal efficiency (>99.56%), and also has a high filtration efficiency in the treatment of vehicle exhausts, with 95.18% for PM 0.3 , 98% for PM 0.5 and >99% for PM 2.5-10.0 . The superior mechanical properties of CMPM allow the filter to be cleaned and reused. After three cycles, the filtration effectiveness of CMPM is still 94.83% for respirable particulate matter. Under high humidity (RH ≥ 95%) conditions, the CMPM-based filter showed higher than 95.37% filtration of PM 0.3-10 , and the oil adsorption rate could be maintained at 284% at high speed, proving the great potential of CMPM to clean air in complex situations.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yunwu Yu,Yan Wu,Zhenchun Li,Yan Wang,Peng Liu,Lihua Wang,Changwei Liu,Ye Wan,Xiaowei Sun,Wenhao Pan
In order to improve both pure water flux and retention rate of the cross-linked ultrafiltration membranes based on phenolphthalein-based poly(ether ether ketone) (PEEKWC) and polyethyleneimine (PEI), poly(ethylene glycol) (PEG) and polyvinylpyrrolidone (PVP) were used as polymeric additives in non-solvent-induced phase separation process. The characterizations, separation effectiveness, and anti-fouling performance of membranes were investigated. Compared with n-butanol additive, the PEG and PVP could accelerate the phase separation rate and form thinner and denser skin layer, and then that led to an increase in the fluxes of pure water and better dye retention performance. In addition, the impact of variable additive dosage on the pure water flux and retention for dye solutions was investigated, and the pure water flux of membranes could reach 3270.8 L·m −2 ·h −1 and 2494.5 L·m −2 ·h −1 at a PEG or PVP concentration of 0.5 wt%, respectively. These membranes also exhibited excellent retention performance for Coomassie brilliant blue and Congo red greater than 98%. The simultaneous improvement of pure water flux and retention performance also could be related to the more efficient water transmission channel forming which was investigated by atomic force microscope phase images. In anti-fouling performance tests , the membranes demonstrated effective anti-fouling properties with a high flux recovery ratio after external cleaning with water only.
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Materials Today Bio
·
2023
·
IF 8.2
Chuan Xie,Qinqin Xiong,Yuanzhi Wei,Xin Li,Jiajun Hu,Min He,Shinan Wei,Jia Yu,Sha Cheng,Mashaal Ahmad,Yufei Liu,Sihai Luo,Xi Zeng,Jie Yu,Heng Luo
Sustained drug release has attracted increasing interest in targeted drug therapy. However, existing methods of drug therapy suffer drug action time, large fluctuations in the effective concentration of the drug, and the risk of side effects. Here, a biodegradable composite of polybutylene adipate co-terephthalate/polyvinylpyrrolidone (PBAT/PVP) consisting of electrospun hollow microspheres as sustained-released drug carriers is presented. The as-prepared PBAT/PVP composites show faster degradation rate and drug (Erlotinib) release than that of PBAT. Furthermore, PBAT/PVP composites loaded with Erlotinib provide sustained release effect, thus achieving a better efficacy than that after the direct injection of erlotinib due to the fact that the composites allow a high drug concentration in the tumor for a longer period. Hence, this work provides a potential effective solution for clinical drug therapy and tissue engineering using drug microspheres with a sustained release.
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Nanoscale
·
2016
·Vol. 8
·期 22
·11531-11542
·
IF 7.76
Ruixia Dou,Zhen Du,Tao Bao,Xinghua Dong,Xiaopeng Zheng,Miao Yu,Wenyan Yin,Binbin Dong,Liang Yan,Zhanjun Gu
Recently, a combination of chemotherapy with photothermal therapy (PTT) has received great attention for the construction of a near infrared (NIR)-controlled drug-delivery system for synergistic treatment of cancer, ultimately resulting in the enhancement of the therapeutic efficacy of anticancer drugs. Here, we developed a novel system for synergistic cancer therapy based on bismuth sulfide (Bi2S3) nanoparticle-decorated graphene functionalized with polyvinylpyrrolidone (PVP) (named PVP-rGO/Bi2S3). The as-prepared PVP-rGO/Bi2S3 nanocomposite has a high storage capacity for anticancer drugs (∼500% for doxorubicin (DOX)) and simultaneously has perfect photothermal conversion efficiency in the NIR region. The results of the in vitro accumulative drug release test manifests that the PVP-rGO/Bi2S3 nanocomposite could be applied as a dual pH- and NIR-responsive nanotherapeutic carrier for the controlled release of DOX from DOX-loaded PVP-rGO/Bi2S3 (PVP-rGO/Bi2S3@DOX). Moreover, the treatment of both cancer cells (including Hela, MCF-7, HepG2 and BEL-7402 cells) and BEL-7402 tumor-bearing mice with the PVP-rGO/Bi2S3@DOX complex followed by NIR laser irradiation produces significantly greater inhibition of cancer cell growth than the treatment with NIR irradiation alone or DOX alone, exhibiting a synergistic antitumor effect. Furthermore, due to the obvious NIR and X-ray absorption ability, the PVP-rGO/Bi2S3 nanocomposite could be employed as a dual-modal contrast agent for both photoacoustic tomography and X-ray computed tomography imaging. In addition to the good biocompatibility, the PVP-rGO/Bi2S3 nanocomposite paves a potential way for the fabrication of theranostic agents for dual-modal imaging-guided chemo-photothermal combined cancer therapy.
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危险品化学品经营许可证（带存储）