Key Laboratory of Advanced Textile Materials and Manufacturing Technology

Hangzhou, China

Key Laboratory of Advanced Textile Materials and Manufacturing Technology

Hangzhou, China

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Zhang G.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Xia Y.,Jiangsu Polytechnic University | Wang H.,Jiangsu Polytechnic University | Tao Y.,Jiangsu Polytechnic University | And 4 more authors.
Journal of Composite Materials | Year: 2010

In view of the shape and distribution of fillers, a model predicting the effective thermal conductivity of filled polymer composites is proposed on the basis of the percolation theory. Compared to other models proposed in the literatures, theoretical results obtained with the percolation model agree better with the experimental data. Methods of determining the percolation threshold Vc and the exponent n in the percolation model are also discussed. © SAGE Publications 2010.


Song L.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Du P.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Xiong J.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Ko F.,Zhejiang Sci-Tech University | Cui C.,University of British Columbia
Electrochimica Acta | Year: 2015

ZnO nanoparticles (ZNPs) and ZnO nanowires (ZNWs) were fabricated via electrospinning and calcination. The ZNPs and ZNWs were blended with different mass ratio by varying ZNWs from 0% to 100% and serviced as photoanodic film of dye-sensitized solar cells (DSSCs) via spin coating. The efficiency of these DSSCs reached a maximum of 2.6% at 20 wt% ZNWs. In order to improve the photovoltaic properties of ZNWs/ZNPs hybrid photoanodic film, the ZNWs/ZNPs hybrid film was modified by the incorporation of multi-walled carbon nanotubes (MWCNTs) into ZnO matrix including both ZNPs and ZNWs combined with TiCl4 post-treatment. As a result, the efficiency of DSSCs increased from 2.6% to 3.8%, which is mainly attributed to the increased dye loading, faster electron transport, and less electron loss. © 2015 Elsevier Ltd. All rights reserved.


Wang J.,Zhejiang Sci-Tech University | Du M.-L.,Zhejiang Sci-Tech University | Du M.-L.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Xu C.-S.,Zhejiang Sci-Tech University | And 3 more authors.
Journal of Macromolecular Science, Part B: Physics | Year: 2012

Densely crosslinked polysiloxane, with high refractive index and high transparency, was synthesized via co-hydrolysis/condensation and then cured via hydrosilylation with a Pt catalyst. 29Si nuclear magnetic resonance (NMR) spectra were utilized to identify the process of co-hydrolysis/ condensation and characterize the structures of the prepolymers. Fourier transform infrared spectroscopy (FTIR) was used to investigate the hydrosilylation reaction. The number-average molecular weight of the prepolymers was determined to be ca. 1200g mol 1. Prepolymers with high refractive index, above 1.52, were synthesized, from which densely crosslinked polysiloxane resins, with high transmittance of about 99% and nearly no absorption in the visible range, were prepared. © 2012 Copyright Taylor and Francis Group, LLC.


Li Y.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Li Y.,Zhejiang Sci-Tech University | Liu J.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Liu J.,Zhejiang Sci-Tech University | Qian C.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology
Advanced Materials Research | Year: 2012

In order to understand the effect of laundering by detergent containing bleaches on cotton fabrics, two detergents with and without bleaches were used during laundering, and the changes in structures and properties of cotton fabrics were investigated after laundering. The structure of the cotton before and after laundering was evaluated by the X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and field scanning electron microscopy (FSEM). Meanwhile, the tensile strength, copper number and dyeing properties of cotton fabric have been studied for evaluating the chemical damage. The results showed that the damage of fabric laundering by detergents containing bleaches is more serious than that by detergents without bleaches. FTIR and copper number results revealed that the C-6 hydroxyl groups of the glucose repeating unit of cellulose were oxidized. XRD, FSEM and dyeing results indicated that the cotton fabrics have been damaged during laundering with detergents containing bleaches.


Chen S.,Zhejiang University | Ma F.,Zhejiang University | Xu A.,Zhejiang University | Wang L.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | And 2 more authors.
Applied Surface Science | Year: 2014

A series of V-doped zirconia nanocrystal (the molar ratio of V/Zr varying from 0.001 to 0.15) were prepared via hydrothermal method and performed in oxidative dehydrogenation of propane. It was found that vanadium was highly dispersed on the surface and in the bulk of ZrO2. The distribution of the vanadium species, the valence states and the aggregation state of V species on the surface, as well as the acid properties of the catalysts including kinds, number and strength were detected by the various characteristic methods. The correlation between the V content and the surroundings of the different V species has been studied. The function of acid properties, especially Brønsted acid in the catalytic performance has been discussed. Oxidative dehydrogenation reactions were carried out in a continuous flow fixed bed reactor and ZrV0.01 catalyst showed good conversion and selectivity with a yield of propylene of 21.3%. © 2013 Elsevier B.V.


Zhang W.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Yu Z.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Qian Q.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Zhang Z.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Wang X.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology
Journal of Membrane Science | Year: 2010

Preparation of CS-based membranes by pre-drying a chitosan/glutaraldehyde (CS/GA) solution for a certain time, followed by an acetone-immersion treatment, allowed the bulk characteristics of the resulting acetone-immersed CS (CSA) membranes to be changed. A decrease in pre-drying time resulted in that the degree of crystallinity was significantly decreased and the mobility of the polymer chains was less restricted. Pervaporation results indicated that the flux increased significantly and the water selectivity decreased with a decrease in pre-drying time. With an increase in relaxation time or degree of crystallinity, the activation energy of the pervaporation process (Ep) experienced an approximately linear increase. The permselectivity of the CSA membrane prepared with a shorter pre-drying time was further improved by introducing carboxyl groups onto its surface. For separating 90% ethanol/water mixtures at 60 °C, the surface-modified CSA membrane showed a separation factor of 500 and a flux of 400 g/m2 h, which are about 5 and 1.6 times greater, respectively, compared to the corresponding crosslinked CS membrane without bulk and surface modification. This indicates that the combination of bulk modification and surface functionalization is an effective approach for simultaneously improving the flux and selectivity of polymeric membranes. © 2009 Elsevier B.V. All rights reserved.


Zhu H.,Zhejiang Sci-Tech University | Du M.,Zhejiang Sci-Tech University | Du M.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Xu C.,Zhejiang Sci-Tech University | And 4 more authors.
Journal of Reinforced Plastics and Composites | Year: 2013

A facile approach was proposed to improve the mechanical properties of the polymer composites by organic-inorganic hybrid networks assembled via hydrogen bonding between halloysite nanotubes and organic hydrogen bonding coupler. Organic hydrogen bonding couplers were incorporated to the polypropylene composites and the hybrid networks were in situ constructed in the process of the fabricating of the composites. The investigations suggest that the formation of hybrid network can remarkably improve the mechanical properties of the composites, mainly including the tensile strength, flexural properties. In addition, the hydrogen bonds between organic hydrogen bonding coupler and halloysite nanotubes and the constructed organic-inorganic hybrid networks were characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results show that the absorption of Si-O of the Fourier transform infrared spectroscopy spectra and the binding energy of the Si and Al atoms of the X-ray photoelectron spectroscopy spectra changed to some extent, indicating the existence of hydrogen bonds between organic hydrogen bonding coupler and halloysite nanotubes. Dynamic mechanical studies suggest the existence of the hybrid networks in the polypropylene matrix. © The Author(s) 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.


Zheng Y.Y.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Wang X.B.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Shang L.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Li C.R.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | And 4 more authors.
Materials Characterization | Year: 2010

Shape-controlled Fe3O4 nanostructure has been successfully prepared using polyethylene glycol as template in a water system at room temperature. Different morphologies of Fe3O4 nanostructures, including spherical, cubic, rod-like, and dendritic nanostructure, were obtained by carefully controlling the concentration of the Fe3+, Fe2+, and the molecular weight of the polyethylene glycol. Transmission Electron Microscope images, X-ray powder diffraction patterns and magnetic properties were used to characterize the final product. This easy procedure for Fe3O4 nanostructure fabrication offers the possibility of a generalized approach to the production of single and complex nanocrystalline oxide with tunable morphology. © 2010 Elsevier Inc. All rights reserved.


Song L.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Du P.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Xiong J.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Fan X.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Jiao Y.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology
Journal of Luminescence | Year: 2012

Terbium-doped lanthanum oxide (La2O3:Tb3) nanofibers were prepared by electrospinning followed by calcination at high temperature. Thermogravimetric analyzer (TGA), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and photoluminescence (PL) were used to characterize the obtained fibers. The results reveal that the nanofibers have an average diameter of ca. 95±25 nm and are composed of pure La2O3 phase. Under the excitation of 274 nm light, the La2O 3:Tb3 nanofibers exhibit the characteristic emission resulting from the 5D4→7FJ (J=3, 4, 5, 6) transitions of Tb3 ions. And the PL emission intensity is stronger than that of their nanoparticle counterparts. © 2011 Elsevier B.V. All rights reserved.


Wang J.,Zhejiang Sci-Tech University | Xu C.,Zhejiang Sci-Tech University | Du M.,Key Laboratory of Advanced Textile Materials and Manufacturing Technology | Du M.,Zhejiang Sci-Tech University | And 2 more authors.
ICAFPM 2011 - Proceedings of 2011 International Conference on Advanced Fibers and Polymer Materials | Year: 2011

Transparent densely crosslinked polysiloxane with high refractive index was synthesized via cohydrolysis/ condensation and final crosslinking via hydrosilylation under a Pt catalyst. We investigated the effects of concentration of hydrochloric acid and the number of Ph groups per silicon in the siloxane networks on the viscosity and the refractive index of the prepolymers. 29Si nuclear magnetic resonance (NMR) spectroscopy and fourier transform infrared spectroscopy (FTIR) were utilized to investigate the structure of prepolymers and crosslinked polysiloxanes, respectively. Owing to the excellent optical property, the transparent densely crosslinked polysiloxane resin was potentially useful for light emitting diode (LED) encapsulant.

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