Co-reporter:Yaxin Liu, Dongzhi Yang, Ruomeng Yu, Jin Qu, Yongzheng Shi, Hongfei Li, and Zhong-Zhen Yu
The Journal of Physical Chemistry C November 16, 2017 Volume 121(Issue 45) pp:25172-25172
Publication Date(Web):October 21, 2017
DOI:10.1021/acs.jpcc.7b07848
The degradation efficiency and recyclability of photocatalysts are the key for their practical applications. Tetrahedral silver phosphate (Ag3PO4) is a superior visible-light photocatalyst, while graphene oxide (GO) sheets with high specific surface area and abundant functional groups are expected to further enhance the photocatalytic efficiency and improve the recyclability of Ag3PO4. Herein, we demonstrate an eco-friendly and kinetically controlled approach to synthesize Ag3PO4/GO hybrids. Tetrahedral Ag3PO4 are grown in situ on the GO sheets in mixed solvents, and their microstructures are controlled by the slow dissolution and ionization of H3PO4 and the adjustment of the volume ratios of ethanol/water solvents. The hybrid with 5 wt % of GO exhibits an extraordinary photocatalytic efficiency and satisfactory recyclability for the degradation of organic dyes. Approximately 99% of methylene blue could be degraded in 4 min, and the degradation percentage is still as high as 97% even after 5 cycles of photocatalytic degradations. The mechanism of reinforcement of the photocatalytic performance was also studied. This hybridization of tetrahedral Ag3PO4 with GO sheets provides an efficient solution to the photocorrosion of Ag3PO4 and is an efficient approach for synthesizing Ag3PO4-based semiconducting hybrids as highly efficient and recyclable photocatalysts.
Co-reporter:Ting Xu, Hongyang Yang, Dongzhi Yang, and Zhong-Zhen Yu
ACS Applied Materials & Interfaces June 28, 2017 Volume 9(Issue 25) pp:21094-21094
Publication Date(Web):May 24, 2017
DOI:10.1021/acsami.7b01176
In this work, a bicomponent scaffold with a core–shell and islandlike structure that combines the respective advantages of polylactic acid (PLA) and chitosan (CS) was prepared via electrospinning accompanied by automatic phase separation and crystallization. The objective of this research was to design nanosized topography with highly bioactive CS onto PLA electrospun fiber surface to improve the cell biocompatibility of the PLA fibrous membrane. The morphology, inner structure, surface composition, crystallinity, and thermodynamic analyses of nanofibers with various PLA/CS ratios were carried out, and the turning mechanism of a core–shell or islandlike topography structure was also speculated. The mineralization of hydroxyapatite and culture results of preosteoblast (MC3T3-E1) cells on the modified scaffolds indicate that the outer CS component and rough nanoscale topography on the surface of the nanofibers balanced the hydrophilicity and hydrophobicity of the fibers, enhanced their mineralization ability, and made them more beneficial for the attachment and growth of cells. Moreover, CS and “islandlike” protrusions on the fiber surface increased the alkaline phosphatase activity of the MC3T3-E1 cells seeded on the fibrous membrane and provided a more appropriate interface for cell adhesion and proliferation. These results illustrate that this kind of PLA/CS membrane has the potential in tissue engineering. More importantly, our study provides a new approach to designing PLA scaffolds, with combined topographic and bioactive modification effects at the interface between cells and materials, for biomedicine.Keywords: chitosan; core−shell; electrospun; island; polylactic acid; tissue engineering;
Co-reporter:Ruomeng Yu, Yongzheng Shi, Dongzhi Yang, Yaxin Liu, Jin Qu, and Zhong-Zhen Yu
ACS Applied Materials & Interfaces July 5, 2017 Volume 9(Issue 26) pp:21809-21809
Publication Date(Web):June 7, 2017
DOI:10.1021/acsami.7b04655
Multifunctional graphene oxide (GO)/chitosan (CS) aerogel microspheres (GCAMs) with honeycomb-cobweb and radially oriented microchannel structures are prepared by combining electrospraying with freeze-casting to optimize adsorption performances of heavy metal ions and soluble organic pollutants. The GCAMs exhibit superior adsorption capacities of heavy metal ions of Pb(II), Cu(II), and Cr(VI), cationic dyes of methylene blue (MB) and Rhodamine B, anionic dyes of methyl orange and Eosin Y, and phenol. It takes only 5 min to reach 82 and 89% of equilibrium adsorption capacities for Cr(VI) (292.8 mg g–1) and MB (584.6 mg g–1), respectively, much shorter than the adsorption equilibrium time (75 h) of a GO/CS monolith. More importantly, the GCAMs maintain excellent adsorption capacity for six cycles of adsorption–desorption. The broad-spectrum, rapid, and reusable adsorption performance makes the GCAMs promising for highly efficient water treatments.Keywords: adsorption; aerogels; graphene oxide; recyclability; water treatment;
Co-reporter:Yongzheng Shi, Dongzhi Yang, Yuan Li, Jin Qu, Zhong-Zhen Yu
Applied Surface Science 2017 Volume 426(Volume 426) pp:
Publication Date(Web):31 December 2017
DOI:10.1016/j.apsusc.2017.06.302
•PAN@TiO2/Ag membranes with high visible light response are fabricated.•TiO2/Ag heterojunctions are formed using dopamine as a binder and reductant.•Nanosized Ag enhances visible light absorption and inhibits recombination of e−/h+.•PAN@TiO2/Ag membrane exhibits stable reusability.Although TiO2-based photocatalysts have exhibited a great potential for degradation of organic pollutants, it is still necessary to simultaneously enhance their visible-light-driven photocatalytic efficiency and physical recyclability. Herein, highly efficient, visible-light-driven photocatalytically active, and recyclable nanofibrous membranes with thin TiO2/Ag heterojunction layer are prepared using electrospun polyacrylonitrile (PAN) nanofibrous membrane as the substrate. By regulating the concentration and hydrolysis process of Ti precursors, TiO2 nanoparticles steadily grow on the PAN nanofibers with high-specific surface area to form a continuous mesoporous shell with the thickness of 20 nm for efficient degradation of organic pollutants. Furthermore, to form a stable heterojunction structure, Ag nanoparticles are deposited on the TiO2 surface by using dopamine as a binder and reductant. The presence of Ag nanoparticles leads to an obvious red-shift from 380 nm to 490 nm, which improves the utilization efficiency of visible light, and reduces the electron/hole recombination rate simultaneously. The resulting PAN@TiO2/Ag membranes hold enhanced photocatalytic activity for methylene blue degradation within 1 h under visible light irradiation, and satisfactory recyclability, which endow them with a great potential for adsorption and photocatalytic applications.Download high-res image (115KB)Download full-size image
Co-reporter:Yongzheng Shi, Yajing Li, Jianfeng Zhang, Zhongzhen Yu, Dongzhi Yang
Materials Science and Engineering: C 2015 Volume 51() pp:346-355
Publication Date(Web):1 June 2015
DOI:10.1016/j.msec.2015.03.010
•Silver mirror reaction was used to prepare nanofibers loaded with silver nanoparticles.•The SAED patterns demonstrated the monocrystallinity of silver nanocrystals.•The XRD results showed nanoparticles tended to be face-centered cubic single silver.•The material showed excellent antimicrobial activities against bacteria and fungi.The silver mirror reaction (SMR) method was selected in this paper to modify electrospun polyacrylonitrile (PAN) nanofibers, and these nanofibers loaded with silver nanoparticles showed excellent antibacterial properties. PAN nanofibers were first pretreated in AgNO3 aqueous solution before the SMR process so that the silver nanoparticles were distributed evenly on the outer surface of the nanofibers. The final PAN nanofibers were characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), TEM-selected area electron diffraction (SAED), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). SEM, TEM micrographs and SAED patterns confirmed homogeneous dispersion of the silver nanoparticles which were composed of monocrystals with diameters 20–30 nm. EDS and XRD results showed that these monocrystals tended to form face-centered cubic single silver. TGA test indicated that the nanoparticles loaded on the nanofibers reached above 50 wt.%. This material was also evaluated by the viable cell-counting method. The results indicated that PAN nanofibers loaded with silver nanoparticles exhibited excellent antimicrobial activities against gram-negative Escherichia coli (E. coli), gram-positive Staphylococcus aureus (S. aureus) and the fungus Monilia albicans. Thus, this material had many potential applications in biomedical fields.
Co-reporter:Yufei Ai;Jun Nie;Gang Wu
Journal of Applied Polymer Science 2014 Volume 131( Issue 22) pp:
Publication Date(Web):
DOI:10.1002/app.41102
ABSTRACT
The unusual amino acid l-3,4-dihydroxyphenylalanine (DOPA), which was found in mussel adhesive protein, was recognized as crucial element for the adhesive of mussel. In this work, the synthesis of thermoresponsive and photocrosslinkable bioadhesive with ternary networks prepared by incorporating dopamine acrylamide (DAM) and N-isopropylacrylamide (NIPAAm) into a crosslinked network based on poly(ethylene glycol)-triacrylate (PEG-TA) was reported. The effects of DAM and NIPAAm on polymerization kinetics, swelling kinetics, adhesion strength, thermomechanical properties, and cytotoxicity assays were systematically evaluated. The results showed that DAM could affect photopolymerization kinetics of terpolymer due to inhibitory effects of the catechol. The terpolymer has not only strong adhesion strength which was better than that of the commercial fibrin adhesives (0.05 MPa), but also the good humid-resistant property. The thermoresponsive properties of the system were investigated by the measurement of swelling kinetics. The equilibrium swelling ratio of gels was obviously higher at 25°C than at 37°C. The thermomechanical properties of terpolymer indicated that the presence of the catechol moiety increased significantly the glass transition temperature (Tg) and crosslink density of ternary network. The results of cytotoxicity of gels indicated that terpolymer were biocompatible and less cytotoxicity towards the growth of mouse fibroblast cells (L929 cells). The obtained products could have the potential to serve as the bioadhesive in the future. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41102.
Co-reporter:Chunxia Li, Tao Wang, Lihui Hu, Yaohua Wei, Jianning Liu, Xueyan Mu, Jun Nie, Dongzhi Yang
Materials Science and Engineering: C 2014 Volume 35() pp:300-306
Publication Date(Web):1 February 2014
DOI:10.1016/j.msec.2013.10.032
•Biomimetic hybrid photopolymeric bioadhesives were prepared from Dex-U and PEG-DOPAs.•Dopamine endgroups were introduced into the three-arm PEG by Michael addition reaction.•The oxidization of catechol also helped Dex-U improved the adhesion strength.•PEG-DOPAs significantly improved adhesion strength and burst pressure of the Dex-U.In this study, a hybrid photopolymeric bioadhesive system consisting of urethane methacrylated dextran (Dex-U) and 3, 4-Dihydroxyphenyl-l-alanine (DOPA) modified three-arm poly (ethylene glycol) s (PEG-DOPAs) was designed. The process of photopolymerization was detected by Photo-Differential Scanning Calorimetry (Photo-DSC). The adhesion strength was evaluated by the lap shear tests. The surface tension of the solutions, burst pressures and the cytotoxicity assays were also investigated. The addition of PEG-DOPAs significantly improved the properties of Dex-U especially in the field of adhesion strength and burst pressure. And materials variation could be tailored to match the demands for tissue repair. Compared to the Dex-U systems, the maximum adhesion strength of the copolymeric system increased from 2.7 ± 0.1 MPa to 4.0 ± 0.6 MPa. Owing to its strong adhesion strength, rapid curing rate and good biocompatibility, such photocrosslinkable hydrogelsa could be applied to the areas of bioadhesive.
Co-reporter:Tao Wang, Xueyan Mu, Haibo Li, Weilong Wu, Jun Nie, Dongzhi Yang
Carbohydrate Polymers 2013 Volume 92(Issue 2) pp:1423-1431
Publication Date(Web):15 February 2013
DOI:10.1016/j.carbpol.2012.09.057
We developed a copolymeric bioadhesive system with the potential to be used as a tissue adhesive based on biopolymer dextran. Copolymeric hydrogels comprising a urethane dextran (Dex-U) and 2-hydroxyethyl methacrylate (HEMA) were prepared and crosslinked under the ultraviolet (UV) irradiation. In this study, the photopolymerization process was monitored by real time infrared spectroscopy (RTIR). The adhesion strength was evaluated by lap-shear-test. The surface tension, viscosity of the solutions and the cytotoxicity assays were investigated. Compared to Dex-U system, the addition of HEMA remarkably improved the properties of Dex-H system especially the adhesion strength and the nontoxicity. And materials variation could be tailored to match the need of tissues. The copolymeric tissue adhesives demonstrated promising adhesion strength and nontoxicity. The maximum adhesion strength reached to 4.33 ± 0.47 Mpa which was 86 times higher than that of Tisseel. The obtained products have the potential to serve as tissue adhesive in the future.Highlights► Photocrosslinkable gels were prepared from copolymeric urethane dextran and HEMA. ► The process of gelation was fast and simple with the help of photocuring. ► The addition of HEMA remarkably improved the adhesive strength and cell attachment. ► These gels were adequate to be novel tissue adhesives.
Co-reporter:Haibo Li;Yi Fu;Rui Niu;Ziyou Zhou;Jun Nie
Journal of Applied Polymer Science 2013 Volume 127( Issue 3) pp:1737-1743
Publication Date(Web):
DOI:10.1002/app.37732
Abstract
In composites of hydroxyapatite (HA) nanoparticles with a polymer matrix, the aggregation of nanoparticles would induce structural defects. In order to improve the dispersibility of HA nanoparticles in poly(ethylene glycol) dimethacrylate (PEGDMA) matrix and enhance mechanical properties of the HA/PEGDMA composite as potential bone substitute material, surface-grafted HA nanoparticles with poly(ethylene glycol) monomethacrylate (PEGMA) were prepared, and crosslinked with PEGDMA under UV light to form a composite. The structure of HA-g-PEGMA was characterized by X-ray diffraction (XRD) and thermal gravimetric analysis (TGA). The dispersibility of HA-g-PEGMA nanoparticles in poly(PEGDMA) was evaluated by SEM. The mechanical properties of the composites were investigated by compressive test. The dispersibility of HA-g-PEGMA nanoparticles in poly(PEGDMA) matrix was better than the bare HA. At a 1 wt % content of loading, the strength of composites increased by 14%, and the modulus increased by 9%. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Co-reporter:Jie Xue;Tao Wang;Jun Nie
Journal of Applied Polymer Science 2013 Volume 127( Issue 6) pp:5051-5058
Publication Date(Web):
DOI:10.1002/app.38115
Abstract
Synthetic adhesives containing 3,4-dihydroxy-L-phenylalanine and its derivatives have strong adhesion strength and good biocompatibility, which make them prime candidates for adhesives or bioadhesives applications. In this study, a new photocurable poly (vinyl alcohol) (UV-PVA) derivative was prepared and used as crosslinking agent to further improve adhesion strength of dopamine methacrylamide (DMA) system. The structure of UV-PVA was confirmed, and the degree of acryloyl group substitution (DS) was easily varied from 10 to 40% by varying the molar ratio of acryloyl chloride to OH of PVA. The effects of ultraviolet light intensity, content of DMA and DS values of PVA on the photopolymerization kinetics were studied, and the effects of DS value on the adhesive strength, swelling performance and cell attachment were also investigated. It was found that adhesive containing UV-PVA with 40% DS value yielded the highest adhesive strength, a relatively low swelling ratio and good biocompatibility. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Co-reporter:Dongzhi Yang;Jianfeng Zhang;Jie Xue;Jun Nie ;Ziping Zhang
Journal of Applied Polymer Science 2013 Volume 127( Issue 4) pp:2867-2874
Publication Date(Web):
DOI:10.1002/app.37653
Abstract
The development of surface microstructure with specific features in electrospun nanofibers has attracted more and more attention in recent years. In this article, a common biological polyester, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was electrospinning into nanofibers with “coral-like” surface microstructure by a conventional-electrospinning setup. The effect of the process parameters on the microstructure in electrospun nanofibers were investigated via a series of experiments. The formation mechanism of this feature structure and cytotoxicity assays of PHBV membrane were also discussed. The water contact angle of the electrospun PHBV membrane was higher than that of the PHBV cast film due to a very-rough fiber surface including porous beads when PHBV was electrospun from the concentration of 4 wt %. Because of special hole shape and size distribution, the physical structure of surface of PHBV electrospun fibers offered it special properties, such as specific-surface area, hydrophilic–hydrophobic properties, adhesion properties of cells and biological substances, etc. The demonstrated method of form coral structure would contribute to the areas such as filtration, sensor, tissue engineering scaffolds, and carriers of drugs or catalysis. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
Co-reporter:Jie Xue, Tao Wang, Jun Nie, Dongzhi Yang
Journal of Photochemistry and Photobiology B: Biology 2013 Volume 119() pp:31-36
Publication Date(Web):5 February 2013
DOI:10.1016/j.jphotobiol.2012.12.001
Synthetic adhesives inspired by marine mussel have attracted great attention due to its excellent water-resistance and good biocompatibility. In this study, a photocrosslinkable bioadhesive containing 3,4-Dihydroxy-l-phenylalanine (DOPA) functional group, which is central to curing mussel adhesive proteins, was prepared by ultraviolet (UV) irradiation of a new photocurable monomer ethylene glycol acrylate methacrylate-dopamine (EGAMA-DOPA) and a UV photocrosslinkable crosslinking agent poly(vinyl alcohol) (UV-PVA) derivative. The chemical structures of EGAMA-DOPA and UV-PVA were confirmed by Fourier Transform Infrared Reflection (FTIR) and 1H NMR spectroscopy, respectively. The effects of UV light intensity, content of photoinitiator, EGAMA-DOPA and UV-PVA on the photopolymerization kinetics were studied, and the effects of the content of UV-PVA and temperature on the adhesive strength were also investigated. It was found that the higher UV light intensity, the faster polymerization rate and the higher final conversion that was the same as the trend of photoinitiator, EGAMA-DOPA and UV-PVA. And the adhesion strength measurement showed that, for gels with 30 wt.% EGAMA-DOPA, the adhesion strength was obviously improved by about 150% with 3.0 wt.% UV-PVA instead of pure PVA, and for gels containing 40 wt.% EGAMA-DOPA, the adhesion strength sharply enhanced by 123% with increasing the content of UV-PVA from 1.0 wt.% to 3.0 wt.%. Cell attachment results showed good cell viability of L929 cell on the EGAMA-DOPA/UV-PVA adhesive gels. Thanks to its strong adhesion strength and good biocompatibility, such photocrosslinkable gels could be applied to the areas of biomedical field.Highlights► A photoactive PVA derivative (UV-PVA) was prepared by esterification process. ► A photocurable monomer EGAMA-DOPA was successfully prepared. ► UV-PVA could be used as a novel polymer crosslinking agent with good properties. ► UV-PVA improved the photopolymerization behavior of EGAMA-DOPA system. ► UV-PVA significantly enhanced the adhesion strength of EGAMA-DOPA system.
Co-reporter:Yufei Ai, Yaohua Wei, Jun Nie, Dongzhi Yang
Journal of Photochemistry and Photobiology B: Biology 2013 120() pp: 183-190
Publication Date(Web):
DOI:10.1016/j.jphotobiol.2012.10.012
Co-reporter:Qi Zhang;Longmin Shi;Jun Nie;Haiyan Wang
Journal of Applied Polymer Science 2012 Volume 125( Issue S2) pp:E526-E533
Publication Date(Web):
DOI:10.1002/app.36852
Abstract
Recently, the natural fibers-reinforced composites have attracted substantial attention as a potential structural material for low cost applications. The composites of poly(lactic acid) (PLA) with three kinds of natural fibers, such as bamboo fibers, wood fibers, and coconut fibers (CTFs), were prepared by solution-casting technique. The natural fibers were modified by aluminum acid ester coupling agent and stearic acid to improve compatibility. To compare the mechanical and thermal properties of composites, tensile test, dynamic mechanical analysis, differential scan calorimeter, scanning electron microscopy (SEM), and Vicat softening point test were carried. The results showed that the addition of three kinds of natural fibers all could improve the mechanical and thermal properties of composites, and natural fibers after modification could further improve tensile strength of composites. And in comparison, the composite of PLA/CTF had highest tensile strength and best thermal properties. When the content of natural fibers were 2%, the highest tensile strength of PLA/modified CTF composites was highest, and it reached 22.5 Mpa which was 20.4% higher than that of pure PLA, and VST of this composite increased compared with pure PLA. Meanwhile, the results of SEM indicated that the modified CTF had best interfacial compatibility to PLA. These results indicated that PLA/natural fiber composites had higher strength and better heat resistance than pure PLA. This study provided the application of PLA industry with a feasible method. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Co-reporter:Yajing Li, Fan Chen, Jun Nie, Dongzhi Yang
Carbohydrate Polymers 2012 90(4) pp: 1445-1451
Publication Date(Web):
DOI:10.1016/j.carbpol.2012.07.013
Co-reporter:Tao Wang, Jun Nie, Dongzhi Yang
Carbohydrate Polymers 2012 90(4) pp: 1428-1436
Publication Date(Web):
DOI:10.1016/j.carbpol.2012.07.011
Co-reporter:Dongzhi Yang, Kun Yu, Yufei Ai, Hongpeng Zhen, Jun Nie, John F. Kennedy
Carbohydrate Polymers 2011 Volume 84(Issue 3) pp:990-996
Publication Date(Web):17 March 2011
DOI:10.1016/j.carbpol.2010.12.057
Based on the principles of biomineralization, a calcium carbonate (CaCO3) and chitosan composite membrane was prepared by mineralized of calcium carbonate on chitosan/poly(vinyl alcohol) nanofibers under dynamic condition. The morphology and structure of membranes were characterized by scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectroscopy. The results showed that the chitosan/poly(vinyl alcohol) nanofibers produced thin CaCO3 island crystals, which interlaced with the chitosan fiber not only on the surface of the membrane but also within the membrane. The crystals could develop into a continuous CaCO3 membrane on the fibers at latter stage of mineralization, the obtained crystals was mainly calcite type of CaCO3, and with small quantity of vaterite. MTT test and SEM imaging indicated that the attachment and growth of mouse fibroblast were well on the surface of CaCO3/chitosan/PVA composite membrane, and this composite has a good application prospect in the field of biomedical materials.
Co-reporter:Yufei Ai;Hongpeng Zhen;Jun Nie
Frontiers of Chemistry in China 2011 Volume 6( Issue 1) pp:44-47
Publication Date(Web):2011 March
DOI:10.1007/s11458-011-0226-9
Electrospinning is known to be a highly versatile method to produce nanofibers, and several techniques have been developed to align nanofibers. In this paper, poly(vinyl alcohol) (PVA), poly(vinylpyrrolidone) (PVP), poly(propylene carbonate) (PC), poly(ethylene oxide) (PEO), PVA/Chitosan and PVA/Fe3O4 uniaxially aligned ultrafine fibers were obtained with electrospinning method by adding another electric field in the collection area. Alignment of the nanofibers was characterized by the use of digital cameras and field emission scanning electron microscopy, polarized Fourier transform infrared spectroscopy (FTIR), and wideangle X-ray diffraction (XRD). The mechanism of fiber alignment was investigated as well.
Co-reporter:Yufei Ai;Shuang Guo;Qi Zhang;Jing Qiao;Xuanyue Gao
Frontiers of Chemistry in China 2011 Volume 6( Issue 1) pp:48-53
Publication Date(Web):2011 March
DOI:10.1007/s11458-011-0230-0
Chitosan and sodium alginate have the opposite charges; they can become a gelatin by the electrostatic attraction, High-voltage electrostatic droplet generator method was used to prepare chitosan-sodium alginate microcapsule. Multi-layer chitosan-sodium alginate microcapsule was prepared through layer-by-layer self-assembly, and the morphology was investigated. In addition, the release property of ofloxacin in microcapsules was studied by UV-Vis microscopy under different conditions such as pH value, layer number, etc. The results showed that the prepared microcapsules have a smooth surface with average particle size about 100 μm. The result of controlled release indicated that the prepared microcapsules are pH-independent, and the rate of release decreased when the layer number increases.
Co-reporter:Rui Niu;Jing Qiao;Hang Yu;Jun Nie
Frontiers of Chemistry in China 2011 Volume 6( Issue 3) pp:221-226
Publication Date(Web):2011 September
DOI:10.1007/s11458-011-0244-7
A photopolymerizationable mimic mussel protein structure monomer, dopamine methacrylamide (DMA), was synthesized. The photopolymerization of DMA was analysed by series real time near infrared spectroscopy (SRTIR). Dopamine methacrylamide/poly (ethylene oxide) (DMA/PEO) nanofibers were successfully prepared by electrospinning of aqueous DMA/PEO solution. Biocompatible nanofibrous membrane with good adhesion was produced by photocuring from the DMA/PEO nanofibers. The surface characterization and structure of the composite nanofibrous membrane were characterized by a scanning electron microscopy (SEM) and contact angle measurements. For identifying the potential crystalline of curing, a XRD method was used through comparing diffraction data. In the cell adhesion test we utilized the mouse fibroblast (L929) to exam the various use of the nanofibrous membrane as scaffolding materials for skin regeneration.
Co-reporter:Haibo Li, Rui Niu, Jinliang Yang, Jun Nie, Dongzhi Yang
Carbohydrate Polymers 2011 86(4) pp: 1578-1585
Publication Date(Web):
DOI:10.1016/j.carbpol.2011.06.068
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