Weilin Xu

Wuhan Textile University, Wu-han-shih, Hubei, China

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Publications (170)337.08 Total impact

  • Wenbin Li · Weilin Xu · Hao Wang · Xin Wang ·

    Journal of Thermal Biology 01/2016; 55:14-19. DOI:10.1016/j.jtherbio.2015.11.005 · 1.51 Impact Factor
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    ABSTRACT: Silk fibroin (SF) was used to improve the biocompatibility of polysaccharide fibers isolated from the traditional Chinese herb, Bletilla striata through wet spinning at room temperature using ethanol as a coagulant. This was found to create a hybrid fiber structure through hydrogen bonding between the hydroxyl groups of the polysaccharide fibers and the amino groups of SF. Increasing SF concentration caused a loosening of this structure due to the formation of SF microspheres via ethanol-induced phase inversion, with the resulting cross-sectional variation causing first an increase then decrease in the breaking point strain of the hybrid fiber. The excellent biocompatibility and mechanical properties of these hybrid fibers makes them ideally suited for use as tissue engineering scaffolds and wound dressings.
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    ABSTRACT: Development of three-dimensional nano-architectures on current collectors has emerged as an effective strategy for enhancing rate capability and cycling stability of the electrodes. Herein, a new type of three-dimensional porous iron vanadate (Fe0.12V2O5) nanowire arrays on a Ti foil has been synthesized by a hydrothermal method. The as-prepared Fe0.12V2O5 nanowires are about 30 nm in diameter and several micrometers in length. The effect of reaction time on the resulting morphology is investigated and the mechanism for the nanowire formation is proposed. As an electrode material used in lithium ion batteries, the unique configuration of the Fe0.12V2O5 nanowire arrays presents enhanced capacitance, satisfying rate capability and good cycling stability, as evaluated by cyclic voltammetry and galvanostatic discharge-charge cycling. It delivers a high discharge capacity of 293 mAh•g-1 at 2.0-3.6 V or 382.2 mAh•g-1 at 1.0-4.0 V after 50 cycles at 30 mA•g-1.
    ACS Applied Materials & Interfaces 11/2015; DOI:10.1021/acsami.5b08282 · 6.72 Impact Factor
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    ABSTRACT: To improve the hydrophilicity of chitosan fiber, N-carboxyethyl chitosan fiber was prepared through Michael addition between chitosan fiber with acrylic acid. The structure was studied by (1)H NMR. The degree of N-substitution, measured via (1)H NMR, was easily varied from 0.10 to 0.51 by varying the molar ratio of acrylic acid to chitosan. Series of properties of N-carboxyethyl chitosan fiber including mechanical property, crystallinity, thermal property and in vitro degradation were investigated by Instron machine, X-ray diffraction and differential scanning calorimetry and thermogravimetric analysis, respectively. The results showed that, introducing the carboxyethyl group into the backbone chain of chitosan fiber destroyed the intra/intermolecular hydrogen bonding, leading to loss of the intra/intermolecular hydrogen bonding and improvement of hydrophilicity. Indirect cytotoxicity assessment of carboxyethyl chitosan fibers was investigated using a L929 cell line. And the obtained results clearly suggested that N-carboxyethyl chitosan fiber was nontoxic to L929 cells. The N-carboxyethyl chitosan fibers are potential as tissue engineering scaffolds.
    International journal of biological macromolecules 11/2015; DOI:10.1016/j.ijbiomac.2015.10.078 · 2.86 Impact Factor

  • Applied Surface Science 11/2015; DOI:10.1016/j.apsusc.2015.11.038 · 2.71 Impact Factor
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    Jie Xu · Daxiang Wang · Lingling Fan · Ye Yuan · Wei Wei · Ruina Liu · Shaojin Gu · Weilin Xu ·
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    ABSTRACT: Wearable energy storage devices that can be used in the garment industry are strongly required to power E-textiles. In this article, polypyrrole (PPy) nanorods were deposited on cotton fabrics via in situ polymerization of pyrrole in the presence of the fibrillar complex of FeCl3 and methyl orange as a reactive self-degraded template. The obtained fabrics could be directly used as supercapacitor electrodes, with a maximum specific capacitance of 325 F g-1 and an energy density of 24.7 Wh kg-1 at a current density of 0.6 mA cm-2. The capacitance remained higher than 200 F g-1 after 500 cycles.
    Organic Electronics 11/2015; 26:292-299. DOI:10.1016/j.orgel.2015.07.054 · 3.83 Impact Factor

  • Applied Surface Science 10/2015; DOI:10.1016/j.apsusc.2015.10.186 · 2.71 Impact Factor
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    ABSTRACT: Flexible and wearable energy storage devices are strongly demanded to power smart textiles. Herein, reduced graphene oxide (RGO) and polypyrrole (PPy) were deposited on cotton fabric via thermal reduction of GO and chemical polymerization of pyrrole to prepare textile-based electrodes for supercapacitor application. The obtained PPy–RGO-fabric retained good flexibility of textile and was highly conductive, with the conductivity of 1.2 S cm−1. The PPy–RGO-fabric supercapacitor showed a specific capacitance of 336 F g−1 and an energy density of 21.1 Wh kg−1 at a current density of 0.6 mA cm−2. The RGO sheets served as conductor and framework under the PPy layer, which could facilitate electron transfer between RGO and PPy and restrict the swelling and shrinking of PPy, thus resulting in improved electrochemical properties respect to the PPy-fabric device.
    Organic Electronics 09/2015; 24. DOI:10.1016/j.orgel.2015.05.037 · 3.83 Impact Factor
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    ABSTRACT: In this study, silk fiber was successfully modified via the application of a nanoscale titania coating using atomic layer deposition (ALD), with titanium tetraisopropoxide (TIP) and water as precursors at 100 °C. Scanning electron microscopy, X-ray energy dispersive spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscope, and field emission scanning electron microscope results demonstrated that uniform and conformal titania coatings were deposited onto the silk fiber. The thermal and mechanical properties of the TiO2 silk fiber were then investigated. The results showed that the thermal stability and mechanical properties of this material were superior to those of the uncoated substance. Furthermore, the titania ALD process provided the silk fiber with excellent protection against UV radiation. Specifically, the TiO2-coated silk fibers exhibited significant increases in UV absorbance, considerably less yellowing, and greatly enhanced mechanical properties compared with the uncoated silk fiber after UV exposure.
    ACS Applied Materials & Interfaces 09/2015; 7(38). DOI:10.1021/acsami.5b05868 · 6.72 Impact Factor
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    ABSTRACT: Xanthan-based hydrogels can be used for encapsulating and controlling release of nutrition ingredients, therapeutic agents, and cells in food and tissue engineering applications. Hydroxyl groups on the xanthan gum (XG) chains permitted the formation of the hydrogels through crosslinking XG with sodium trimetaphosphate (STMP). Dynamical oscillation tests were performed to monitor the in situ crosslinking process, and to evaluate the forming kinetics and mechanical stability for the XG-STMP hydrogels. The results indicated that the transition from hydrogen bonding to chemical crosslinking for the XG chains occurred and reached a balance approximately at 25 and 37 °C, respectively. The XG-STMP hydrogel networks with solid-like gel behavior exhibited more elastic and tougher to resist the deformation than the physical XG hydrogels. The XG-STMP hydrogels with porous and interconnected structure displayed good swelling and release-controlled properties. This work provides some valuable and fundamental information of the xanthan-based hydrogels for further application in biomaterials, medical and food engineering.
    Food Hydrocolloids 09/2015; 52. DOI:10.1016/j.foodhyd.2015.09.006 · 4.09 Impact Factor
  • Genyang Cao · Dan Sheng · Weilin Xu · Xin Wang ·
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    ABSTRACT: In this study, 2-phenoxyethanol was used as a carrier to realise the bright-colour dyeing of aramid fibre. Fourier transform infrared, X-ray diffraction, and thermal analyses were used to characterise the modification of 2-phenoxyethanol on the aramid fibre structure. The dyeing performance, including the K/S value and the dye uptake, was tested by varying the concentration of 2-phenoxyethanol and related experimental parameters. Structural analysis suggests strengthened H-bonds, lower crystallinity, and slightly lower thermal stability after 2-phenoxyethanol treatment, which can be explained by the swelling effect of 2-phenoxyethanol, enlarging the amorphous structure through the reassembly of hydroxyl bonding to the aramid fibre. The dyeing performance can be improved by increasing the dyeing time, the temperature, and the concentration of sodium nitrate under slightly acidic condition. Colour fastness tests showed that 2-phenoxyethanol treatment does not affect the rubbing fastness but lowers the wash fastness slightly. Dyeing of aramid is crucial under special environmental conditions in which the products must withstand a harsh environment while retaining a bright colour.
    Coloration Technology 09/2015; 131(5). DOI:10.1111/cote.12165 · 1.26 Impact Factor
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    ABSTRACT: Carboxymethyl chitosan fiber (CMCF) was successfully prepared and characterized by FTIR. The swelling behavior, mechanical property, antibacterial activity and indirect cytotoxicity assessment of CMCF were also studied, respectively. The results showed that, CMCF had higher liquid absorption capacity and lower tensile strength and elongation at break than those of chitosan fiber. The antibacterial activity of CMCF was similar with chitosan fiber, and carboxymethylation did not enhance the antibacterial activity directly. Indirect cytotoxicity assessment of the fibers indicated that CMCF was nontoxic to the L929 cell with relatively low extraction concentration. This novel fiber would be used as a potential wound dressing for skin regeneration.
    Journal of Natural Fibers 05/2015; 12(3):211-221. DOI:10.1080/15440478.2014.918007 · 0.46 Impact Factor
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    ABSTRACT: To obtain superhydrophobic surface, aluminum oxide was deposited onto wool fabrics using atomic layer deposition (ALD) by exposing them to alternating pulses of trimethylaluminum and water at 80 °C. Scanning electron microscope (SEM) and X-ray fluorescence (XRF) analysis showed that Al2O3 layer and uniform Al2O3 nano particle were formed around the surface of ALD coated wool fiber, which showed higher surface roughness than control wool fiber. The static water contact angles of ALD coated wool fabrics increased from 130° to around 160°, and had a higher durability than that of control wool fabric. The dynamic water contact angles of all samples were also tested. Furthermore, the common household liquids also existed as ball-like droplet on the ALD coated wool fabrics and as stain spot on the control wool fabrics after exposure for 1800s.
    Applied Surface Science 05/2015; 349. DOI:10.1016/j.apsusc.2015.05.061 · 2.71 Impact Factor
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    ABSTRACT: Sodium vanadate (Na5V12O32 or Na1.25V3O8) nanowire arrays successfully prepared using a facile hydrothermal method with subsequent calcination. The length of Na5V12O32 nanowire arrays on titanium foil are about 10.5 μm. The unique architecture renders the high-rate transportation of lithium ions that is attributed to their nanosized structure, active materials connected to current collector and high specific surface area. When the Na5V12O32 nanowire arrays on titanium foil annealed at 250 °C as electrodes for lithium-ion batteries exhibite significantly capacity stability with a capacity from 339.3 to 289.7 mAh∙g-1 in 50 cycles at 50 mA∙g-1. The superior electrochemical performance demonstrated that the Na5V12O32 nanowire arrays are a promising electrode for secondary organic lithium-ion batteries.
    RSC Advances 04/2015; 5(53). DOI:10.1039/C5RA01102G · 3.84 Impact Factor
  • Jie Xu · Daxiang Wang · Ye Yuan · Wei Wei · Shaojin Gu · Ruina Liu · Xiaojun Wang · Li Liu · Weilin Xu ·
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    ABSTRACT: Monodispersed inorganic oxide nanoparticles are one kind of the most commonly used templates for efficient and controllable preparation of conducting polymer nanostructures. In this article, we report the fabrication and characterization of PPy-coated cotton fabrics through in situ chemical polymerization by using CuO nanoparticles as template. The electrical conductivity of the coated samples increases dramatically to 10.0 S cm−1 with the introduction of CuO. The electrochemical properties of the obtained fabrics are examined by cyclic voltammetry and charge/discharge analysis. The increase of scan rate in the range of 5-50 mV s−1 has a small effect on the specific capacitance for the fabric electrode, pointing out the improved ion transportation in this electrode. The charge/discharge test further reveals that the fabric device shows high specific capacitance (225 F g−1 at a current density of 0.6 mA cm−2) and good cycling performance (about 92 % capacitance retention after 200 cycles) in aqueous electrolyte. These PPy-coated fabrics have potential to be used as electrode materials for wearable supercapacitors.
    Cellulose 04/2015; 22(2). DOI:10.1007/s10570-015-0546-x · 3.57 Impact Factor
  • Xin Liu · Yunrong Tang · Bowen Zhang · Fengxiang Chen · Weilin Xu ·
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    ABSTRACT: Nonisothermal crystallization kinetics of pure polypropylene and polypropylene/down feather fiber composites were investigated using a differential scanning calorimeter at five different cooling rates. The experimental data on crystallinity versus temperature were analyzed by Avrami, Ozawa, and Liu models, respectively. The results indicated that the presence of down feather fiber served as nucleating agent and increased the onset and peak temperatures of crystallization of polypropylene/down feather fiber composites. Interestingly, polypropylene/down feather fiber composites showed a slower primary crystallization and a faster secondary crystallization than pure PP, meaning that down feather fiber retired the crystallizaiton process of PP matrix. The nucleation activity and activation energies were also calculated and agreed well with these results. Wide-Angle X-ray diffraction patterns indicated that down feather fiber induced the formation of β-monoclinic crystals in polypropylene matrix. These phenomena were definitely different from the nonisothermal crystallization kinetics of polypropylene composite based on inorganic particles and organic cellulose fibers. POLYM. COMPOS., 2015. © 2015 Society of Plastics Engineers
    Polymer Composites 04/2015; DOI:10.1002/pc.23508 · 1.63 Impact Factor
  • Xiuying Liu · Weilin Xu · Chaocan Zhang · Hongtao Liu · Jin Fang ·
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    ABSTRACT: Ionic liquid, 1-butyl-3-methylimidazolium chloride, was used as the solvent of silk fibroin (SF) polymer for its homogeneous chemical modification by chlorosulfonic acid in a non-aqueous system. The sulfation of SF in the ionic liquid possesses several obvious advantages, such as mild reaction condition, high modification degree, low degradation and requiring no dialysis process. The incorporation of sulfate groups was confirmed by infrared spectroscopy and its amount was measured by elemental analysis. 1H NMR spectra revealed that the sulfation occurred mainly at tyrosine and serine residues. The coagulation time tests showed the anticoagulant activity of SF which was induced by the incorporated group.
    Materials Letters 03/2015; 143. DOI:10.1016/j.matlet.2014.12.140 · 2.49 Impact Factor
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    ABSTRACT: Ultraviolet (UV) irradiation can cause a severe damage to textiles, such as color fading, polymer degradation, and mechanical strength decrease. The aim of this study was to deposit inorganic UV blocking agents onto polyamide/aramid dyed fabric using atomic layer deposition (ALD) technique to produce functional fabrics that are resistant to high intensity UV light. Scanning electron microscopy (coupled to energy-dispersive spectroscopy), X-ray photoelectron spectroscopy, and thermogravimetry studies demonstrated that TiO2, Al2O3, and TiO2/Al2O3 nanolayer could be successfully deposited onto the fiber surface. The dyed fabrics with different ALD coatings showed excellent high intensity UV resistance and were also more resistant to high intensity UV-induced mechanical strength damage. These results suggested that the ALD technology could be effective technique to improve the properties of dyed fabrics. POLYM. ENG. SCI., 2015. © 2015 Society of Plastics Engineers
    Polymer Engineering and Science 03/2015; 55(6). DOI:10.1002/pen.24068 · 1.52 Impact Factor
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    ABSTRACT: Precursors of ammonium vanadium bronze (NH4V4O10) nanowires assembled on a conductive substrate were prepared by a hydrothermal method. After calcination at 360 °C, the NH4V4O10 precursor transformed to vanadium pentoxide (V2O5) nanowires, which presented a high initial capacity of 135.0 mA h g−1 at a current density of 50 mA g−1 in 5 M LiNO3 aqueous solution; while the specific capacity faded quickly over 50 cycles. By coating the surface of V2O5 nanowires with water-insoluble polypyrrole (PPy), the formed nanocomposite electrode exhibited a specific discharge capacity of 89.9 mA h g−1 at 50 mA g−1 (after 100 cycles). A V2O5@PPy //LiMn2O4 rechargeable lithium battery exhibited an initial discharge capacity of 95.2 mA h g−1; and after 100 cycles, a specific discharge capacity of 81.5 mA h g−1 could retain at 100 mA g−1.
    Journal of Colloid and Interface Science 02/2015; 439. DOI:10.1016/j.jcis.2014.10.011 · 3.37 Impact Factor
  • Lei Guo · Fengxiang Chen · Yingshan Zhou · Xin Liu · Weilin Xu ·
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    ABSTRACT: The nonisothermal crystallization kinetics of polypropylene/down feather fiber composites were investigated using a Differential Scanning Calorimeter at five different cooling rates. The Avrami and Liu models were able to satisfactorily describe the crystallization behavior of composites, which indicated the entirely unique mechanism. It was found that fiber/matrix interface and thermal conductivity of fiber had key roles for the crystallization behavior of composites and had a close relationship with the properties of the industrial product reinforced with natural protein fiber. The nucleation activity and activation energies were also calculated by different theoretical models and also proved the experimental results.
    Composites Part B Engineering 01/2015; 68:300-309. DOI:10.1016/j.compositesb.2014.09.004 · 2.98 Impact Factor

Publication Stats

1k Citations
337.08 Total Impact Points


  • 2008-2015
    • Wuhan Textile University
      Wu-han-shih, Hubei, China
    • University of Texas at Austin
      Austin, Texas, United States
  • 2010-2012
    • Donghua University
      • College of Textile
      Shanghai, Shanghai Shi, China
  • 2006-2010
    • Wuhan University of Science and Technology
      Wu-han-shih, Hubei, China
  • 2008-2009
    • Government of the People's Republic of China
      Peping, Beijing, China
  • 2001-2006
    • Wuhan Institute of Technology
      Wu-han-shih, Hubei, China