State Key Laboratory for Modification of Chemical Fibers and Polymer Materials

Laboratory for, United States

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials

Laboratory for, United States
SEARCH FILTERS
Time filter
Source Type

Yuan Z.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Chen D.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
Journal of Applied Polymer Science | Year: 2017

A novel poly(ethylene glycol)-based nanocomposite hydrogels containing Fe-octacarboxylic acid phthalocyanine (FeOCAP)/magnetic attapulgite was successfully synthesized by in situ polymerization. Fourier transform infrared spectroscopy result showed the FeOCAP/magnetic attapulgite was successfully introduced into the hydrogels matrix. Besides, the hydrogen bond interactions existed between FeOCAP/attapulgite and hydrogels, which acted as the crosslink points in the hydrogels network, and meanwhile, stabilized the nanoparticles in hydrogel without phase separation. Photocatalytic activity studies confirmed that the as-prepared nanocomposite hydrogels had excellent photocatalytic activity for rhodamine B photodegradation, as compared to the pure hygrogels. The rhodamine B removal percentage of the hydrogels could reach nearly 100% and the kinetics of photocatalytic degradation reaction was described by the Langmuir-Hinshelwood kinetics models. The hydrogels could be reused more than five times without losing any photodegradation ability, which indicated that the hydrogels would be potentially useful in dyes wastewater treatments. © 2017 Wiley Periodicals, Inc.


Li L.,Wenzhou Medical College | Li G.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Jiang J.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Liu X.,Wenzhou Medical College | And 2 more authors.
Journal of Materials Science: Materials in Medicine | Year: 2012

Development of fibrous scaffold of hydroxyapatite/ biopolymer nanocomposite offers great potential in the field of bone regeneration and tissue engineering. Hydroxyapatite (HA)/poly (∈-caprolactone) (PCL) fibrous scaffoldswere successfully prepared by electrospinning dopes containing HA and PCL in this work. It was found that pretreating HA with γ- glycioxypropyltrimethoxysilane (A-187) was effective in improving HA dispersion both in solutions and in a PCL matrix. Mechanical properties of the scaffolds were greatly enhanced by the filling of A187-HA. The bioactivity of PCL was remarkably improved by the addition of HAandA187-HA. Fibroblasts and osteoblasts were seeded on scaffolds to evaluate the effect of A-187 on biocompatibility of HA/PCL composites. Based on this study, good dispersion ofHAin PCLmatrix was granted by pretreatment ofHA with A-187 and A187-HA/PCL fibrous scaffolds were obtained by electrospinning. These results demonstrated that the scaffolds may possess improved mechanical performance and good bioactivity due to A187-HA incorporation. © 2011 Springer Science+Business Media, LLC.


Xu Q.,Donghua University | Wang Y.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
Advanced Materials Research | Year: 2013

The preparation of melt-blown filtration materials was studied in this paper. The effects of collection distance, screw speed, air temperature on web structure and properties were discussed, and moreover, fiber diameter, thickness, surface density, pore size, air permeability and breaking force of PP nonwoven fabrics were characterized in this paper. © (2013) Trans Tech Publications, Switzerland.


Wang S.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
International journal of nanomedicine | Year: 2011

We report on aminopropyltriethoxysilane (APTS)-mediated surface modification of nanohydroxyapatite with different surface functional groups for potential biomedical applications. In this study, nanohydroxyapatite covalently linked with APTS (n-HA-APTS) was reacted with acetic anhydride or succinic anhydride to produce neutralized (n-HA-APTS. Ac) or negatively charged (n-HA-APTS.SAH) nanohydroxyapatite, respectively. Nanohydroxyapatite formed with amine, acetyl, and carboxyl groups was extensively characterized using Fourier transform infrared spectroscopy, transmission electron microscopy, (1)H nuclear magnetic resonance spectroscopy, X-ray diffraction, inductively coupled plasma-atomic emission spectroscopy, and zeta potential measurements. In vitro 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide colorimetric assay revealed that the slight toxicity of the amine-functionalized n-HA-APTS could be eliminated by post-functionalization of APTS amines to form acetyl and carboxyl groups. Blood compatibility assessment demonstrated that the negligible hemolytic activity of the pristine nanohydroxyapatite particles did not appreciably change after APTS-mediated surface functionalization. APTS-mediated functionalization of nanohydroxyapatite with different surface groups may be useful for further functionalization of nanohydroxyapatite with biologically active materials, thereby providing possibilities for a broad range of biomedical applications.


Fang Y.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Fang Y.,Donghua University | Chen D.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Chen D.,Donghua University
Materials Research Bulletin | Year: 2010

A novel nano-composite catalyst was prepared from immobilization of Fe-octacarboxylic acid phthalocyanine onto the supporting material attapulgite. The morphology and structure of the catalyst were analyzed by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared and ultraviolet-visible spectroscopy. The catalyst activity was examined through comparative experiments, and results showed that it exhibited high activity for degradation of Rhodamine B in the presence of hydrogen peroxide. The recycling test was also carried out to prove its reusability in catalytic application. © 2010 Elsevier Ltd. All rights reserved.


Wei H.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Li G.,Donghua University
Applied Mechanics and Materials | Year: 2014

Sulfonated poly (arylene ether sulfone)s (SPAESs) exhibit good proton conductivity, thermal and mechanical properties, could act as candidates of proton exchange membranes for fuel cells. At the same time, the poor oxidative stability and excessive swelling ratio of SPAESs bring limitations for its further use. In this article, PAN was employed to mix with SPAES, and then SPAES/PAN blend membranes were prepared from the blend solution by casting. The water uptake, dimensional and oxidative stability, proton conductivity were measured with respect to the addition content of PAN, the phase morphology of the resultant SPAES/PAN were also observed by SEM. The results explained that the corporation of PAN into SPAES could reduce the water uptake and improve the oxidative stability of the obtained membranes compared with the pristine SPAES membrane. That the PAN phase distributed as separated domains in SPAES matrix was found, the interaction between SPAES and PAN may be present, which is responsible for the improvement of dimensional and oxidative stability. Although the proton conductivity of the blend membranes became reduced with increase of PAN content in the SPAES/PAN blend, the conductivity of 0.0265S/cm at 30°C could still be reached, satisfying the requirement for proton exchange membrane Fuel Cell. © (2014) Trans Tech Publications, Switzerland.


Shen K.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Yang S.L.,Donghua University
Advanced Materials Research | Year: 2013

Relatively high molecular weight poly(glycolic acid)(PGA) was prepared by improved melting polycondensation of glycolic acid. Firstly, two kinds of catalyst, zinc acetate dihydrate and tin dichloride dehydrate, were utilized respectively, and a selection was made according to the molecular weight of final product. It has been found that the tin catalyst was the better one. Then the catalyst usage, the heating program, the polymerization time, as well as the vacuum condition were optimized. It was found that the high vacuum at 220~230°C contributed much to the molecular weight to the polymer, however, the polymerization time should be less than 1.5hr to avoid the discolor of the product. Finally, the PGA with a weight average molecular weight of 45,000g/mol were obtained directly without solid phase polycondensation, which was rather higher than some reported previously. The structure and properties of PGA were also characterized by means of intrinsic viscosity, FTIR, NMR and DSC testing. © (2013) Trans Tech Publications, Switzerland.


Gu R.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Yu J.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Hu C.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Chen L.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | And 2 more authors.
Applied Surface Science | Year: 2012

This paper is focused on influence of argon dielectric barrier discharge (DBD) plasma on the adhesive performance and wettability of para-aramid fibers and three parameters including treated power, exposure time and argon flux were detected. The interfacial shear strength (IFSS) was greatly increased by 28% with 300 W, 60 s, 2 L min -1 argon flux plasma treatment. The content of oxygen atom and oxygen-containing polar functional groups were enhanced after the argon plasma treated, so as the surface roughness, which contributed to the improvement of surface wettability and the decrease of contact angle with water. However, long-time exposure, exorbitant power or overlarge argon flux could partly destroy the prior effects of the treatment and damage the mechanical properties of fibers to some degree. © 2012 Elsevier B.V.


Chang Z.J.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Zhao X.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Zhang Q.H.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Chen D.J.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | Chen D.J.,Donghua University
Express Polymer Letters | Year: 2010

A facile way for alignment of carbon nanotubes in macroscopic polymer matrix was developed by combining electrospinning and in-situ polymerization. The approach is based on the formation of nanofibre scaffolds with wellaligned arrays, which is filled with carbon nanotubes (CNTs). CNTs will be well aligned in macroscopic polymer matrix when the aligned nanofibre scaffold containing CNTs has been incorporated into the poly(methyl methacrylate) (PMMA) matrix by in-situ polymerization. We demonstrate that this scaffold approach is broadly applicable and allows for the fabrication of nanocomposites with accurately aligned nanofillers. The results presented in this report show that the approach is ideal by using polyacrylonitrile (PAN) nanofibres as a scaffold of multiwalled carbon nanotubes (MWNTs), and PMMA as the macroscopic polymer matrix. The tensile strength (7.2 wt% MWNTs/PAN nanofibres loadings) reaches 48.61 MPa, 87% higher than that pure PMMA, and the tensile modulus is increased by 175%. © BME-PT.


He C.,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials | He C.,Donghua University | Ma B.,Donghua University
Polymers for Advanced Technologies | Year: 2010

The aim of this paper is the preparation and characterization of cellulose/chitin blend filaments over the experimental blend ratio scope i.e., 2.89 and 6.46% (w/w) chitin content through high wet modulus (HWM) procedure. The spinnability of the invested solutions was found to vary in the following order: chitin

Loading State Key Laboratory for Modification of Chemical Fibers and Polymer Materials collaborators
Loading State Key Laboratory for Modification of Chemical Fibers and Polymer Materials collaborators