Fujian Provincial Key Laboratory of Advanced Materials Processing and Application

Fuzhou, China

Fujian Provincial Key Laboratory of Advanced Materials Processing and Application

Fuzhou, China
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Cui Z.,Fujian University of Technology | Cui Z.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Cui Z.,Fuzhou University | Cui Z.,Zhengzhou University | And 13 more authors.
Journal of Biomaterials Science, Polymer Edition | Year: 2017

As one of the stimulators on bone formation, osteogenic growth peptide (OGP) improves both proliferation and differentiation of the bone cells in vitro and in vivo. The aim of this work was the preparation of three dimensional porous poly(ε-caprolactone) (PCL) scaffold with high porosity, well interpore connectivity, and then its surface was modified by using chitosan (CS)/OGP coating for application in bone regeneration. In present study, the properties of porous PCL and CS/OGP coated PCL scaffold, including the microstructure, water absorption, porosity, hydrophilicity, mechanical properties, and biocompatibility in vitro were investigated. Results showed that the PCL and CS/OGP-PCL scaffold with an interconnected network structure have a porosity of more than 91.5, 80.8%, respectively. The CS/OGP-PCL scaffold exhibited better hydrophilicity and mechanical properties than that of uncoated PCL scaffold. Moreover, the results of cell culture test showed that CS/OGP coating could stimulate the proliferation and growth of osteoblast cells on CS/OGP-PCL scaffold. These finding suggested that the surface modification could be a effective method on enhancing cell adhesion to synthetic polymer-based scaffolds in tissue engineering application and the developed porous CS/OGP-PCL scaffold should be considered as alternative biomaterials for bone regeneration. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Yang C.,Fujian University of Technology | Yang C.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Wu H.,Minjiang University | Wang J.,Fuzhou University
Materials Research | Year: 2017

A multi-layer scaffold that incorporates bioglass, phosphatidylserine and steroidal saponins loaded collagen microparticles was prepared in this study. Combinatorial processing techniques involving porogen leaching protocol and freeze-drying were used. Drug distribution and microstructure could be controlled mainly by the concentrations of drug-loaded collagen microparticles and porogen as well as freezing temperature for different layers of the scaffolds. Morphological observation, measurement of swelling properties, examination of drug release kinetics, and analysis of cell bioactivity showed that the resultant scaffolds had highly interconnected pores, gradient drug distribution and graded porous micro-Architecture, similar swelling ratio for different layers, better drug release kinetics in view of lower initial release and slower average release rate compared to the scaffolds with homogeneous structure, as well as approving support of cell ingrowth. This study suggests that the optimized scaffolds have promising potential for applications in bone tissue engineering.


Zheng C.,Fujian University of Technology | Zheng C.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Chen W.,Fujian University of Technology | Chen W.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | And 3 more authors.
Materials Letters | Year: 2017

A facile and simple strategy to construct a copper oxide dots assembly on copper silicate nanorod structures (CuO@Cu5(OH)2(SiO3)4) as a high performance optical limiter is reported. CuO nanoparticles with a high crystalline nature were homogenously decorated on the surface of Cu5(OH)2(SiO3)4. No other crystalline impurities were detected in the resulting nanostructure. The CuO@Cu5(OH)2(SiO3)4 nanostructure showed a sharp absorption peak at 265 nm and a broad weak band around 490 nm, correspond to the absorption of Cu5(OH)2(SiO3)4 and CuO nanoparticles, respectively. The optical limiting (OL) properties of the CuO@Cu5(OH)2(SiO3)4 nanostructure were investigated with a nanosecond open-aperture Z-scan technique at 532 nm. The results indicated better OL performance of CuO@Cu5(OH)2(SiO3)4 than benchmark carbon nanotubes and suggested that CuO@Cu5(OH)2(SiO3)4 is a good candidate for OL applications. © 2017 Elsevier B.V.


Tian J.,Fuzhou University | Tian J.,Fujian University of Technology | Tian J.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Dai P.,Fujian University of Technology | And 2 more authors.
Journal of Materials Science: Materials in Electronics | Year: 2017

The interfacial microstructures between Zn–Sn solder alloys and Cu substrate were investigated, and the effect of rare earth (RE) elements on the interfacial microstructures between Zn–Sn solder alloys and Cu substrate were also studied. The results showed that irregular shape, scallop-type ε-CuZn5 and flat γ-Cu5Zn8 and β′-CuZn IMC layers formed at the interface between Zn–Sn solders and Cu substrate. In solder part, dendritic ε-CuZn5 phase formed at the α-Zn phase during soldering process. Cu atoms are transported to the molten solder along the ε-CuZn5 grain boundaries during soldering process and result in columnar dendrite growth of ε-CuZn5 at the ε-CuZn5 grain boundaries. When small amount of RE element was added into solder alloy, the wettability of the solder alloys was significantly improved, while the thickness of the reaction layers at the interface of Zn–Sn solders/Cu was increased. At the same time, RE can promote the growth of columnar dendrite ε-CuZn5 phase. © 2017 Springer Science+Business Media, LLC


Zheng C.,Fujian University of Technology | Zheng C.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Huang L.,Fujian University of Technology | Li W.,Fujian University of Technology | And 3 more authors.
Applied Physics B: Lasers and Optics | Year: 2017

2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrin Cobalt(II) (CoPor) was introduced into nanostructured organically modified silica (ORMOSIL) using a sol–gel technique. Scanning electron microscopy, Fourier transform infrared (FT-IR), thermogravimetric analysis, and UV–Vis spectroscopy were performed to investigate the morphology, structure, thermal stability, and linear optical properties of the resulting gel glasses. The FT-IR spectrum and UV–Vis spectra strongly indicated the formation of a silica gel glass network and the successful encapsulation of CoPor in ORMOSIL silica gel glasses, respectively. The introduction of guest CoPor molecules induces silica to form more condensed surface characteristics, owing to the fact that CoPor can promote the hydrolysis and polycondensation procedure, and hence have better thermal stability as compared to blank silica gel glasses. Meanwhile, the dimerization phenomenon in a liquid matrix can be effectively suppressed in a silica solid-state matrix and is attributed to the ‘cage protection effect.’ The nonlinear optical (NLO) properties of CoPor gel glasses were investigated using the open-aperture Z-scan technique at 532 nm. The NLO performance of CoPor-incorporated solid-state silica gel glasses has been improved in comparison with those dispersed in dimethylformamide solution. More significantly, the NLO properties of CoPor-doped ORMOSIL gel glasses can be controlled by adjusting the concentration of the CoPor molecules. © 2016, Springer-Verlag Berlin Heidelberg.


Guo Q.,Fujian University of Technology | Guo Q.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Dai E.,Washington University in St. Louis | Han X.,Dartmouth College | And 3 more authors.
Journal of the Royal Society Interface | Year: 2015

The capability to sense and respond to external mechanical stimuli at various timescales is essential to many physiological aspects in plants, including self protection, intake of nutrients and reproduction. Remarkably, some plants have evolved the ability to react to mechanical stimuli within a few seconds despite a lack of muscles and nerves. The fast movements of plants in response to mechanical stimuli have long captured the curiosity of scientists and engineers, but the mechanisms behind these rapid thigmonastic movements are still not understood completely. In this article, we provide an overview of such thigmonastic movements in several representative plants, including Dionaea, Utricularia, Aldrovanda, Drosera and Mimosa. In addition, we review a series of studies that present biomimetic structures inspired by fast-moving plants. We hope that this article will shed light on the current status of research on the fast movements of plants and bioinspired structures and also promote interdisciplinary studies on both the fundamental mechanisms of plants' fast movements and biomimetic structures for engineering applications, such as artificial muscles, multi-stable structures and bioinspired robots. © 2015 The Author(s) Published by the Royal Society. All rights reserved.


Hua N.,Fujian University of Technology | Hua N.,Fuzhou University | Hua N.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Li G.,Fujian University of Technology | And 10 more authors.
Journal of Non-Crystalline Solids | Year: 2015

In this study, the variations in compressive mechanical properties of a variety of Zr-based bulk metallic glasses (BMGs) were analyzed. Systematic changes in composition were employed to modify the compressive malleability of the Zr-based BMGs. The enhancement on the malleability of investigated Zr-based BMGs could be correlated with the variations in Poisson's ratio. Two-parameter Weibull statistical analysis was performed on their compressive strengths over a statistically significant number of specimens. High compressive strength reliability demonstrated by its high uniformity in strength was found on the Zr-based BMGs. Malleable Z4 (Zr66Al9Ni8.3Cu16.7) BMG showed a higher Weibull modulus (m =71) as compared with the less malleable Z1 (Zr53Al16Co23.25Ag7.75) BMG (m =38), implying a more uniform distribution of compressive failure strength and a higher reliability. The correlation of m with the intrinsic malleability of Zr-based BMGs was discussed by the variations in the Poisson's ratio, the shear modulus or the glass transition temperature. © 2015 Elsevier B.V.


Yang C.,Fujian University of Technology | Yang C.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Fang C.,Fujian University of Technology | Fang C.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application
Materials Research | Year: 2015

Scaffolds featuring spatiotemporal control of drug release is highly desirable for bone tissue regeneration. The objective of this study was to construct a scaffold with gradient porosity and drug distribution and evaluate the effect of scaffold structure on drug release kinetics and cell bioactivity. Nano-hydroxyapatite/collagen/phosphatidylserine scaffolds embedded with steroidal saponin loaded collagen microparticles were prepared using a porogen leaching protocol. Morphological characterization showed that the scaffolds consisted of dense layer and loose layer, and pores were interconnective. The microparticles were entrapped at the center of the scaffolds follow a gradient distribution. Release kinetics correlated with the structure. The loose layer showed greater drug release amount as compared to the dense layer. Such differences in release kinetics have distinct effects on cell bioactivity. Cell proliferated much more in loose layer than that in the dense layer. Such spatial and temporal control over drug deposition and delivery within the scaffolds could provide opportunities for tissue regeneration associated with optimum drug doses at wound site, and lessen undesirable drug release and side-effects at uninjured site. © 2015.


Zheng C.,Fujian University of Technology | Zheng C.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Li Y.,Fujian University of Technology | Huang L.,Fujian University of Technology | And 4 more authors.
Optical Materials | Year: 2015

A facile method to assemble tetragonal Pt clusters on the surface of graphene oxide (Pt-cluster/GO) using anatase TiO2 as a template is proposed. The morphology and structure of Pt-cluster/GO were investigated, revealing that tetragonal Pt clusters with a diameter of 20-50 nm composed of 2-3 nm Pt nanoparticles (NPs) were homogenously decorated on the surface of GO. The nonlinear optical properties were characterized by the open-aperture Z-scan technique in the nanosecond regime using a laser with wavelength of 532 nm. The as-prepared Pt-cluster/GO hybrid was found to show strong optical limiting (OL) effects for nanosecond laser pulses at 532 nm, and the OL performance is superior to that of carbon nanotubes, a benchmark optical limiter. Furthermore, the Z-scan results showed that the OL performance of the Pt-cluster/GO hybrid is superior to that of GO and the Pt-NP/GO hybrid. The OL behavior of the metal/GO composite nanostructure can be effectively tailored by altering the aggregation means of metal NPs. Scattering measurements suggested that nonlinear scattering (NLS) played an important role in the observed OL behavior in the Pt-cluster/GO hybrid. The OL properties of the Pt-cluster/GO hybrid are attributed to the reverse saturable absorption in the GO sheet and NLS in the metal NPs. © 2015 Elsevier B.V. All rights reserved.


Zheng C.,Fujian University of Technology | Zheng C.,Fujian Provincial Key Laboratory of Advanced Materials Processing and Application | Dai C.,Fujian University of Technology | Huang L.,Fujian University of Technology | And 4 more authors.
Optical Materials | Year: 2016

Cadmium metasilicate nanowires (CdSiO3 NWs) have been synthesized through a facile, eco-friendly, low-cost water-ethanol mixed-solution hydrothermal route. The transmission electron microscopy measurements of as-prepared samples indicate that the CdSiO3 NWs with diameters in the range of 10-60 nm and lengths of more than 1 μm were constructed by self-assembly of 5-10-nm CdSiO3 nanoparticles with good crystallinity. The monoclinic phase formation of the sample is studied in detail by X-ray diffraction, Fourier-transform infrared spectroscopy, and thermo gravimetric analysis. The results indicate that a pure monoclinic phase of CdSiO3 can be obtained by a hydrothermal route without further calcinations and SiO4 tetrahedra were the main constituents of the CdSiO3 NWs. The nanosecond optical limiting (OL) effects were characterized by using an open-aperture (OA) Z-scan technique with 4-ns laser pulses at both 532 and 1064 nm. Theses CdSiO3 NWs displayed an excellent OL performance at 532 and 1064 nm, which was better than carbon nanotubes, a benchmark optical limiter. Input-fluence dependent scattering measurements suggested than nonlinear scattering played an important role in the observed optical limiting behavior in CdSiO3 NWs at 532 and 1064 nm. More significantly, the NLO performance in CdSiO3 NWs incorporated solid silica gel glass has been improved in comparison to those dispersed in water. The unique structure and excellent OL property render these CdSiO3 NWs competitors in the realms of optical limiting applications. © 2016 Elsevier B.V. All rights reserved.

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