Polymers
·
2019
·Vol. 11
·期 8
·1293
·
IF 3.164
Xuejuan Shi,Xiaoxiao Zhang,Liang Ma,Chunhui Xiang,Lili Li
Chitosan/cellulose acetate (CS/CA) used as a biopolymer systema, with the addition of TiO2as photocatalyst (C-T/CA) were fabricated by alternating electrospinning/electrospraying technology. The uniform dispersion of TiO2and its recovery after the removal of methyl orange (MO) was achieved by incorporating TiO2in CS electrosprayed hemispheres. The effects of pH values, contact time, and the amount of TiO2on adsorption and photocatalytic degradation for MO of the C-T/CA were investigated in detail. When TiO2content was 3 wt %, the highest MO removal amount for fiber membranes (C-T-3/CA) reached 98% at pH value 4 and MO concentration of 40 mg/L. According to the data analysis, the pseudo-second-order kinetic and Freundlich isotherm model were well fitted to kinetic and equilibrium data of MO removal. Especially for C-T-3/CA, the fiber membrane exhibited multiple layers of adsorption. All these results indicated that adsorption caused by electrostatic interaction and photocatalytic degradation were involved in the MO removal process. This work provides a potential method for developing a novel photocatalyst with excellent catalytic activity, adsorbing capability and recycling use.Keywords:TiO2;chitosan;electrospinning;electrospraying;methyl orange;photocatalytic degradation
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 36
·19022-19027
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IF 11.301
Hui Ma,Haoge Cheng,Xinlei Ma,Sen Wang,Zhuqing Zhou,Yuqiao Chai,Ruoqi Chen,Xinyue Zhang,Yonglin He,Yapei Wang,Yan Li,Xusheng Wang,Rui Li,Ning Ma,Mianqi Xue
Charge/light-related advancements have greatly pushed the development of modern technology, and the relationship between charge and light is worth exploring. While research into the applications of light and charge flow (photoelectric current) is in full swing, studies on the reaction between light and electrostatic charge have made little progress on rare ways to realize photo-stimulated discharge. Herein, we link electrostatic charge and light using a bridge of intense heat, which is produced from the efficient photothermal conversion of Ti3C2Tx MXene. The in situ photothermal conversion and selective thermally stimulated discharge are successfully combined, then novel light-induced electrostatic lithography can be realized on both polymethyl methacrylate glasses and nanofilms. In this process the surface temperature of Ti3C2Tx film can be as high as 300 °C using 808 nm near-infrared irradiation at a power density of 1.7 W cm−2. The combination of light and electrostatic charge is also successfully applied to electrostatic printing and chemical reactions.
研究领域:
材料科学
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光子学
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纳米技术
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DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 71
·43523-43532
·
IF 3.119
Wei Gao,Zeng-chao Dang,Fu-sheng Liu,Sheng Wang,Duan-wei Zhang,Meng-xi Yan
Two kinds of double comb-like quaternary ammonium salt polymers P(DPA-EPI) and P(DBA-EPI) with lower polarity were designed and synthesized using epichlorohydrin (EPI), di-n-propylamine (DPA) and di-n-butylamine (DBA) as raw materials. The transparent antistatic epoxy resin coatings were obtained using the two polymers as antistatic agents, respectively. Because P(DPA-EPI) and P(DBA-EPI) with good hygroscopic performance are easily dissolved in epoxy resin paints and are nearly linearly arranged in the epoxy resin paints, the obtained transparent antistatic epoxy resin coatings achieve good antistatic properties. The values of ρs of the coatings reach 5.13 × 108 Ω sq−1 and 2.69 × 108 Ω sq−1, respectively, with a lower addition amount of polymers of only 1.0 wt%. The two antistatic epoxy resin coatings also have good durability. Compared to the epoxy resin coating, with the introduction of P(DPA-EPI) and P(DBA-EPI), the thermal stability and adhesion of the antistatic epoxy resin coatings do not change obviously, but the Rockwell hardness values slightly reduce.
研究领域:
材料科学
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化学工程
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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
研究领域:
生物医学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
Pharmaceutics
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2023
·Vol. 16
·期 1
·45
·
IF 5.4
Xiaowei Zhang,Rundong Zhu,Xingzhi Wang,Hao Wang,Zushun Xu,Yongan Wang,Dongqin Quan,Liao Shen
Local chemotherapy is an alternative therapeutic strategy that involves direct delivery of drugs to the tumor site. This approach avoids adverse reactions caused by the systemic distribution of drugs and enhances the tumor-suppressing effect by concentrating the drugs at the tumor site. Drug-loaded microspheres are injectable sustained-release drug carriers that are highly suitable for local chemotherapy. However, a complex preparation process is one of the main technical difficulties limiting the development of microsphere formulations. In this study, core-shell structured microspheres loaded with paclitaxel (PTX; with a core-shell structure, calcium alginate outer layer, and a poly (lactic acid-co-glycolic acid) copolymer inner layer, denoted as PTX-CA/PLGA-MS) were prepared using coaxial electrostatic spray technology and evaluated in vitro and in vivo. PTX-CA/PLGA-MS exhibited a two-stage drug release profile and enhanced anti-tumor effect in animal tumor models. Importantly, the preparation method reported in this study is simple and reduces the amount of organic solvent(s) used substantially.Keywords:chemotherapy;controlled drug-release;microspheres;electrostatic spray
研究领域:
肿瘤学
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药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the American Chemical Society
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2014
·
IF 11.444
Huilin Hou,Lin Wang,Fengmei Gao,Guodong Wei,Bin Tang,Weiyou Yang,Tom Wu
Recently, preparation of mesoporous fibers has attracted extensive attentions because of their unique and broad applications in photocatalysis, optoelectronics, and biomaterials. However, it remains a great challenge to fabricate thoroughly mesoporous nanofibers with high purity and uniformity. Here, we report a general, simple and cost-effective strategy, namely, foaming-assisted electrospinning, for producing mesoporous nanofibers with high purity and enhanced specific surface areas. As a proof of concept, the as-fabricated mesoporous TiO2 fibers exhibit much higher photocatalytic activity and stability than both the conventional solid counterparts and the commercially available P25. The abundant vapors released from the introduced foaming agents are responsible for the creation of pores with uniform spatial distribution in the spun precursor fibers. The present work represents a critically important step in advancing the electrospinning technique for generating mesoporous fibers in a facile and universal manner.
研究领域:
材料科学
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纳米技术
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电化学
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催化
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高分子科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Cen Zhang,Sicheng Li,Di Chen,Wenjing Lu,Chaogeng Xiao
Multicore-shell nanofibers were fabricated by integrating emulsion electrospinning and coaxial electrospinning technologies, in which the multicore section of the nanofibers was prepared by electrospinning of gelatin-stabilized emulsions, and the shell layer was coaxially electrospun from zein solution. Coaxial electrospinning of zein helped form emulsion-based electrospun fibers with bead-in-string, spindle-like, and straight morphologies. The hydrogen bonding between gelatin and zein contributed to the enhanced thermal properties of coaxially electrospun nanofibers. The coating of zein as shell greatly improved fiber surface wettability and mechanical strength. The release behavior of curcumin from the nanofibers was dominated by Fickian diffusion, and the zein shell as a physical barrier favored the prolonged release of curcumin and then the long-lasting antibacterial activity towards Escherichia coli . This work thus gives an insight into the development of the nanofibers by emulsion-coaxial electrospinning as encapsulation matrices for the application in food products.
研究领域:
食品科学
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材料科学
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 11
·918
·
IF 3.504
Dan Tian,Chun-Hui He,Ji-Huan He
Electrospinning is now commercially used for the fabrication of nano/micro fibers. Compared with spider dragline silk, artificial fibers have poor mechanical properties. Unlike natural silk, which has a hierarchical structure with an approximate 3-fold symmetry, the molecular structure of spun fiber has neither folding nor orientation. To date, it is almost impossible to control molecule orientation during the spinning process. Here, we show that macromolecule orientation can be easily controlled using the laminar flow of fluid mechanics. A lasting laminar flow in a long needle can order macromolecules. We find that the orientation of macromolecules can greatly affect the morphology and mechanical properties of fibers. We expect our technology to be helpful for more sophisticated fabrication of fibers with ordered macromolecules and DNA-like twists.Keywords:macromolecule;laminar flow;electrospinning;hierarchical structure
研究领域:
材料科学
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生物物理学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Yiling Zhu,Rui Zhu,Jun Xie,Qiuliang Wang,Hu Chen,Yunfei Liu,Yinong Lyu
A novel PS@CdTe multilayers fluorescence microsphere was successfully synthesized by the electrostatic layer-by-layer (LBL) self-assembly technique. The structure, the process of self-assembly and the fluorescence performance were confirmed by high-resolution transmission electron microscope (HRTEM), Zeta potentiometric analyzer and fluorescence spectrophotometer, respectively. The results manifest that when the pH of buffer solution is 7.8, the negative charge on the surface of CdTe quantum dots (QDs) is the largest, which is beneficial to the synthesis of electrostatic self-assembled microspheres. The fluorescence properties of PS@CdTe microspheres increased gradually with the number of layers coated increased, and the optimum number of coating layers is three. Under this condition, the PS@CdTe microspheres exhibited a great increase of 25-fold in fluorescence performance compared to the equal quantity of pure CdTe QDs. Moreover, the emission spectra of PS@CdTe microspheres recorded under the excitation of 410 nm, and shows a strong emission peak located at 524 nm. This kind of core-shell microspheres has a great potential to be used in the field of optoelectronics .
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2018
·Vol. 29
·期 6
·1788-1794
·
IF 2.137
Si Chen,Bo Zhou,Meng Ma,Yanqin Shi,Xu Wang
Permanently antistatic and high transparent PMMA terpolymer, P(MMA-co-HPA-co-SPMA), were reported in this paper, providing a new method to significantly improve the antistatic properties of PMMA without sacrificing transparency. 2-Hydroxypropyl acrylate (HPA) was chosen as a kind of compatilizer because of the good compatibility with both methyl methacrylate (MMA) and sulfopropyl methacrylate potassium salt (SPMA), a potential antistatic agent with a strong hydrophilic group. The mechanical and optical properties of P(MMA-co-HPA-co-SPMA) terpolymer barely show any visibly differences compared to PMMA homopolymer, confirmed through Fourier transform infrared, dynamic mechanical analysis, and a haze meter. Furthermore, antistatic property analysis indicates that only a small amount of SPMA can significantly improve the antistatic properties of the obtained PMMA terpolymers. The surface resistivity of the P(MMA-co-HPA-co-SPMA) sheets could be reduced to 10 9 Ω sq −1 order of magnitude, while the SPMA content reached 0.72 wt%. The hydrophilic groups, the hydroxyl and acrylate sulfonate, on the surface contributed to attract the water molecules, which rendered it a reasonably good antistatic property. These selected terpolymers will provide more opportunities to develop high-performance and antistatic products made from PMMA materials.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 2
·520
·
IF 4.927
Le Xu,Xi Liu,Jiao Jia,Hao Wu,Juan Xie,Yongtang Jia
Accurately and sensitively sensing and monitoring the pH in the environment is a key fundamental issue for human health. Nanomaterial and nanotechnology combined with fluorescent materials can be emerged as excellent possible methods to develop high-performance sensing membranes and help monitor pH. Herein, a series of fluorescent nanofiber membranes (NFMs) containing poly-1,8-naphthimide derivative-3-[dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azaniumyl]propane-1-sulfonate (PNI-SBMA) are fabricated by electrospinning the solution of PNI-SBMA blended with poly(vinyl alcohol) (PVA). The surfactant-like functionalities in side chains of PNI-SBMA endow the NFMs with outstanding hydrophilicity, and the naphthimide derivatives are sensitive to pH by photoinduced electron transfer effect, which contribute to highly efficient pH fluorescence sensing applications of NFMs. Specifically, the PNI-SBMA/PVA NFM with a ratio of 1:9 (NFM2) shows high sensitivity and good cyclability to pH. This work demonstrates an effective strategy to realize a fluorescent sensor NFM that has a fast and sensitive response to pH, which will benefit its application of pH sensor monitoring in the water treatment process.Keywords:electrospinning;nanofibers;fluorescence;sensors;pH
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2023
·
IF 4.1
Lei Wang,Zeen Yv,Licheng Ma,Qi Zheng,Tong Wang,Xiaokui Che,Xinglan Cui,Hongxia Li,Shenyv Wei,Xinyue Shi
Calcium carbonate is a common natural mineral with a wide range of applications. In this study, hollow calcite microspheres were successfully synthesized by using calcium chloride and sodium carbonate as raw materials in an SDS–PEG system. The results suggested that the appropriate concentration of SDS is necessary during the spherical crystallization of calcium carbonate. It was found that the crystals started to aggregate under the effect of SDS, and aggregation was enhanced with an increase in SDS concentration, leading to the transformation from hollow to solid microspheres. However, high temperatures will lead to the transformation from calcite to aragonite, resulting in the collapse of the formed spherical structure. Infrared spectroscopy and conductivity analysis suggested that when the concentration of SDS reached 0.3 g/L in the PEG–SDS system, SDS and PEG formed a spherical supramolecular structure. This structure could act as a template, leading to the aggregation of calcite through electrostatic attraction and finally to the formation of a hollow spherical structure.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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