Weilin Xu

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

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Publications (165)317.99 Total impact

  • Organic Electronics 11/2015; 26:292-299. DOI:10.1016/j.orgel.2015.07.054 · 3.83 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
  • 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
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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
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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
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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
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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
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    ABSTRACT: A new nonspecific protein antifouling polysulfone (PSU) material has been elaborated by grafting zwitterionic sulfobetaine (SB) complex by the means of PSU azidation (PSU-N3) followed by “Click-Chemistry” with acetylenic zwitterionic SB monomer (N,N'-diethyl-N-propargyl-N- (3-sulfopropyl) ammonium (DEPAS)). Azidation (PSU-N3) and functionalization (PSU-g-DEPAS) PSU materials were characterized by 1H NMR, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Contact angle and protein adsorption on PSU-g-DEPAS and unmodified PSU membrane were studied. The results show that the chemical modification of PSU improved both the hydrophilicity and antiprotein absorption ability. This new fouling-resistance to protein material has potential for biomaterials applications. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41327.
    Journal of Applied Polymer Science 01/2015; 132(4). DOI:10.1002/app.41327 · 1.77 Impact Factor
  • Ruina Liu · Li Liu · Dong Fang · Jie Xu · Sanping Zhao · Weilin Xu
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    ABSTRACT: Two novel chelating anion nitronyl nitroxide radical bridged dinuclear lanthanide complexes [Tb2(hfac)4(NIT2PhO)2] (1) and [Ho2(hfac)4(NIT2PhO)2] (2) [hfac = hexafluoroacetylacetonate; NIT2PhO = 2-(2′-hydroxyphenyl)-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide] were prepared and structurally characterized by single crystal X-ray diffraction, elemental analysis, and IR spectroscopy. Both complexes are dinuclear phenoxo-O anion bridged with the oxygen atom of the N–O group coordinated to a single Ln(hfac)2 unit. The central Ln atoms exhibit a heptacoordinated environment, and the shape around the metal atom is capped octahedral. This structure is first reported in the lanthanide-nitronyl nitroxide system. It provides an innovative approach to synthesize new dinuclear lanthanide-nitroxide-based complexes. Additionally, the magnetic properties of the two complexes are studied.
    Zeitschrift für anorganische und allgemeine Chemie 01/2015; 641(3-4):n/a-n/a. DOI:10.1002/zaac.201400497 · 1.16 Impact Factor
  • Fengxiang Chen · Lin Xiong · Mian Cai · Weilin Xu · Xin Liu
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    ABSTRACT: In this study, the agricultural solid waste, natural down fibers were produced into superfine down particle (NSDP), which was used as a low-cost adsorbent for the removal of direct fast scarlet 4BS (DFS-4BS) from aqueous solution. Scanning electron microscopy (SEM), N2 adsorption/desorption, and Fourier Transform infrared spectroscopy (FTIR) were used to characterize the adsorbent material, respectively. The effects of pH, adsorbent dose, initial dye concentration, temperature, and contact time on the adsorption capacity of DFS-4BS by NSDP were studied. The experimental adsorption data were well fitted by Langmuir adsorption isotherm and the maximum adsorption capacity of DFS-4BS by NSDP was found to be 120.34 mg/g at 45 °C, which was higher than other reported adsorbent. Overall, NSDP could be used as an effective and low-cost adsorbent to remove DFS-4BS from industrial wastewater.
    Fibers and Polymers 01/2015; 16(1):73-78. DOI:10.1007/s12221-015-0073-2 · 0.88 Impact Factor
  • Xin Wang · Wenbin Li · Weilin Xu · Hao Wang
    Fibers and Polymers 12/2014; 15:2437-2440. · 0.88 Impact Factor
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    ABSTRACT: Ring spun yarn hairiness can be reduced by such methods as spinning with a contact surface and Z-twisting the staple strand in a “left diagonal” yarn path (denoted as LDP). Actually, the LDP method already exists in sirofil spinning technology. In this study, mechanism analysis of controlling and trapping staple fibers is conducted theoretically for sirofil spinning with a contact surface. Analysis reveals that contacting with a rubber surface leads to deformation of the straight sirofil spinning strand; this can better the tension and twist distribution on the right-hand component of the sirofil spinning triangle to improve LDP sirofil yarn appearance. Related experiments are also carried out to validate the theoretical analysis. Online pictorial investigation confirms the deformation of the straight sirofil composite yarn once it contacts with a rubber surface. Experimental results show that the lower weight loss and smoother appearance are bestowed upon LDP sirofil yarn spun with a rubber contact surface, which agrees well with corresponding theoretical analysis.
    Textile Research Journal 11/2014; 85(2). DOI:10.1177/0040517514542863 · 1.60 Impact Factor
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    ABSTRACT: In this article, cellulose membranes (CMs) containing zwitterionic sulfobetaine groups were prepared from cellulose membranes with azide groups and N,N-Diethyl-N-Propargyl-N-(3-sulfopropyl) ammonium via click chemistry in a one pot two-step grafting reaction. The CMs were fully characterized by attenuated total reflectance Fourier transform infrared spectra, X-ray photoelectron spectroscopy, X-ray spectroscopy analysis. Results showed that zwitterionic monomers were successfully grafted from CM surfaces and the surface morphologies were investigated by scanning electron microscope and atomic forced microscope. It has been proved that the surface roughness of zwitterionic sulfobetaine functionalized cellulose membranes were greater than the starting cellulose membranes. This new member has potential for biomedical applications.
    Polymer Bulletin 10/2014; 71(10). DOI:10.1007/s00289-014-1207-1 · 1.44 Impact Factor
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    ABSTRACT: Cotton fabrics were coated with conducting polypyrrole (PPy) by mist polymerization derived from aqueous solution of pyrrole (Py) with ferric chloride (FeCl3) as oxidant. The polymerization conditions, such as the reaction time and the concentrations of monomer and oxidant, were systematically investigated. The prepared PPy-coated fabrics could keep their temperature at about 24-44 degrees C when charged by a fixed DC voltage of 1-3 V. The results indicate that these PPy-coated fabrics can be used potentially as heating pads and integrated into the apparel to make the wearer warm enough using a portable battery. Furthermore, such fabrics are more comfortable than the conventional heating pads due to their flexibility and breathability.
    Fibers and Polymers 09/2014; 15(9):1804-1809. DOI:10.1007/s12221-014-1804-5 · 0.88 Impact Factor

Publication Stats

952 Citations
317.99 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
  • 2009
    • Huazhong University of Science and Technology
      Wu-han-shih, Hubei, China
  • 2008–2009
    • Government of the People's Republic of China
      Peping, Beijing, China
  • 2007
    • Feng Chia University
      臺中市, Taiwan, Taiwan
  • 2001–2006
    • Wuhan Institute of Technology
      Wu-han-shih, Hubei, China