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International Symposium on Multifunctional Ceramic materials Based on Nanotechnology, ISMCN 2010

作者： Huang, L.W. Fu, Y. Wang, H. Lee, S.W. Niihara, K. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea Republic of Extreme Energy-Density Research Institute Nagaoka University of Technology Niigata 940-2188 Japan

Spark plasma sintering (SPS) and Self-propagating High-temperature synthesis/ quick pressing (SHS/QP) methods were used to fabricate nanotubes reinforced alumina. The difference in microstructure was discussed. In the SHS/QP process, the maximum densification temperature is 1660°C and the heating rate is about 1600°C /min. The whole densification process in SHS/QP is very short, which is much beneficial to protect the nanotubes and restrain the growing of grains. The fracture toughness of the sample prepared by SHS/QP is up to 4.9MPam1/2 for 1mass% CNTs/Al2O3 composites, which shows excellent toughening effects of nanotubes.

关键词： Microstructure

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synthesis of superparamagnetic FePt nanoparticles and their anticancer activities on brain tumor cells

Synthesis of superparamagnetic FePt nanoparticles and their ...

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第十一届全国生物无机化学学术会议

作者： Haiming Sun Ting Zhang Mingyan Dong Dan Chen Yixia Yin Qingzhi Wu Shipu Li State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and BiomedicalMaterials and Engineering Center Wuhan University of Technology Wuhan 430070 China

Superparamagnetic FePt nanoparticles (NPs) have attracted considerable attention due to their extremely promising potentials as the diagnostic and therapeutic reagent in biomedical *** the present study,water-soluble FePt NPs about 4 nm in diameter and oil-soluble FePt NPs about 6 nm in diameter were successfully synthesized using amino acids and oleic acid/oleylamine as the capping reagent,*** component,size and magnetic property of FePt NPs were tuned through adjusting the reactant molar ***,the anticancer activities of FePt NPs with different capping reagents were evaluated using different brain tumor cell lines (such as U251,U87,H4) as the *** growth prohibition of tumor cells by NPs was measured through MTT assay,while the interaction of NPs and tumor cells was observed through transmission electron microscopy (TEM).The results show that FePt NPs capped with oleic acid/oleylamine displayed better cytotoxic effects toward brain tumor cells than L-cysteine-capped FePt *** is interesting that the cellular uptake of FePt NPs seem to be similar in three cell *** conclusions,we synthesized successfully superparamagnetic FePt NPs with the different component using different capping reagents,which displayed different anticancer activities on Human brain tumor *** results also provide a promising potential of superparamagnetic FePt NPs as the multifunctional diagnostic and therapeutic reagent in biomedical fields.

关键词： FePt superparamagnetic anticancer activities brain tumor cells

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Influence of oxygen content on hardness of Cr(N,O) thin films deposited by an RF sputtering method

Influence of oxygen content on hardness of Cr(N,O) thin film...

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International Symposium on Multifunctional Ceramic materials Based on Nanotechnology, ISMCN 2010

作者： Shirahata, J. Ohori, T. Asami, H. Suzuki, T. Nakayama, T. Suematsu, H. Lee, S.W. Fu, Z. Niihara, K. Extreme Energy-Density Research Institute Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka 940-2188 Japan Department of Mechanical Engineering Tomakomai National College of Technology 433 Nishikioka Tomakomai 059-1275 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea Republic of State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Cr(N,O) thin films were deposited by radio frequency reactive unbalanced magnetron sputtering on Si(100) or glassy carbon substrates. In this paper, the influence of oxygen content on hardness of Cr(N,O) thin films was investigated. The compositional analysis was carried out by Rutherford backscattering spectroscopy. It was found that these thin films contained up to 44at.% of oxygen. Phases in the samples were determined by X-ray diffraction. Cr(N,O) thin films show only peaks based on CrN. The microstructure was observed by utilizing a transmission electron microscope. At

关键词： Thin films

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Fine-structured TiO2 ceramic patterns on the ceramic surface fabricated by replication

Fine-structured TiO2 ceramic patterns on the ceramic surface...

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International Symposium on Multifunctional Ceramic materials Based on Nanotechnology, ISMCN 2010

作者： Kim, H.D. Nakayama, T. Hong, B.J. Imaki, K. Yoshimura, T. Suzuki, T. Suematsu, H. Lee, S.W. Fu, Z. Niihara, K. Extreme Energy-Density Research Institute Nagaoka University of Technology 1603-1 Kamitomioka Nagaoka 940-2188 Japan Department of Physics and Electronics Graduate School of Engineering Osaka Prefecture University 1-1 Gakuencho Nakaku Sakai 599-8531 Japan Department of Environmental Engineering Sun Moon University Chungnam 336-708 Korea Republic of State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

The ability to fabricate high precision micro- to nanoscale structure in a wide variety of materials is of crucial importance for the advancement of microtechnology, nanotechnology and nanoscience. Also, the ability to create micrometer and sub-micrometer architecture for functional ceramics is a prerequisite of exploring the rich field of ceramic nanotechnology. In this work we fabricated three-dimensional oxide ceramic materials with fine-structure over multiple length scales by combining replication patterning technique, polyvinyl alcohol (PVA), oxide ceramic material (TiO2) nano-sized particles. Our study is based on the idea that PVA can be easily detached from a mold by peeling. We confirmed that micron and sub-micron-sized fine-structured oxide ceramic patterns containing nano-sized pores could be fabricated using this procedure. The results presented demonstrate the compositional and structural diversities that are possible with a facile approach and simple method.

关键词： Ceramic materials

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Facile synthesis of Uniform Hollow Hematite Sub-micro Spheres with Controllab.e Shell Thickness

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Journal of Wuhan University of technology(materials Science) 2010年第1期25卷 32-38页

作者：闫共芹官建国 State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

A simple method was developed to prepare the uniform hematite hollow submicro-spheres with controllab.e structure and different diameter based on monodisperse poly（styrene-co-acrylic acid） [P（St-co-AA）] particles. The structure and formation mechanism of the hollow spheres were investigated in detail. The control mechanism of shell thickness was also discussed. The results indicated that the shell thickness and coarseness of the synthesized core-shell hematite hollow spheres could be tuned simply by the surface carboxyl content of the P（St-co-AA） particles. This method provided a new approach for the structure control in the preparation of hollow spheres. A Brunauer-Emmett-Teller （BET） test shows that the prepared hollow spheres have large surface areas which were decreased along with the increase of the diameter. The magnetic properties of the as-obtained hematite hollow spheres were investigated. The result showed that the coercivity and saturated magnetization were increased along with the increase of the shell thickness, and the remanent magnetization was increased along with the decrease of the diameter.

关键词： hollow spheres hematite shell thickness BET special surface area magnetization properties

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Extraordinary Photocatalytic activity of Three-Dimensionally Ordered Macroporous Titania

Extraordinary Photocatalytic activity of Three-Dimensionally...

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International Conference on Clean Energy Science 2011年国际清洁能源科学会议(ICCES2011)

作者： Min Wu Yu Li Baolian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanHubei 430070China Laboratory of Inorganic Materials Chemistry (CMI) The University of Namur (FUNDP)Namur B-5000Belgium State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhanHubei 430070China Laboratory of Inorganic Materials Chemistry (CMI)The University of Namur (FUNDP)Namur B-5000Belgium

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The Preparation of Oriented TiO 2 Nanotube Films by Electrophoretic Deposition Method without Hard Template and Enhanced Photocatalytic Activity

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Integrated Ferroelectrics 2011年第1期128卷 97-104页

作者： Zhao, Li Shen, Yi Wang, Shimin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology PR China Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei University PR China Faculty of Material Science and Chemical Engineering China University of Geosciences PR China

Highly oriented titanate nanotube (TNT) film was successfully synthesized by a simple electrophoretic deposition (EPD) method without any hard templates and surfactants. This oriented films adequately utilized the excellent properties of ID nanomaterials such as single crystal semiconductor architectures, large surface area, and superior charge transport, which lead to higher photocatalytic activity. We believe that this versatile method can be extent to fabricate other ordered ID nanomaterials films. [ABSTRACT FROM AUTHOR]

关键词： Electrophoretic deposition oriented films photocatalytic activity

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Oriented nanostructured titanates array from low concentration alkaline solution via hydrothermal process

Oriented nanostructured titanates array from low concentrati...

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作者： Zhuo, Yanjun Wu, Congcong Han, Song Chi, Bo Pu, Jian Jin, Tetsuro Jian, Li School of Materials Science and Engineering State Key Lab. of Material Processing and Die and Mould Technology Huazhong University of Science and Technology Wuhan Hubei 430074 China College of Forestry Northeast Forestry University Harbin 150040 China 1-8-31 Midorigaoka Ikeda Osaka 563-8577 Japan

Na2Ti2O5·H2O nanowire/nanobelt array and other nanostructures were hydrothermally prepared on Ti substrate in low concentration NaOH solution (>5 mol/L). Then the Na 2Ti2O5H2O nanostructures were converted to H2Ti2O5 · H2O through an ion-exchange process and finally to TiO2 anatase by calcination at 450 °C without changing their nanostructures. The morphology of the prepared Na2Ti2O5·H2O nanostructures could be controlled by varying the experimental parameters such as hydrothermal temperature and alkaline solution. The formation mechanism of the nanoarray was also discussed. © 2011 American Scientific Publishers.

关键词： Nanostructures

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The synthesis and Structure of New Perovskite-type Niobate Processed in Millimeter Wave Field

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MRS Online Proceedings Library (OPL) 2011年第1期784卷 C11.30-C11.30页

作者： Hanxing Liu Long Zou Jian Zhou Guangjiang Yuan Hua Hua Dabing Luo Jirun Luo Shixi Ouyang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road 122 Wuhan 430070 P.R. China The Institute of Electronics Chinese Academy of Sciences Beijing 100080 P. R. China

In present paper a new niobate materials Ba5LixTixNb10-xO30 were synthesized by doping Li+ in the system BaO- TiO2- Nb2O5 in millimeter wave field. X-ray diffraction (XRD) quantitative and scanning transition spectroscopy (SEM) analysis were employed to study crystal structure and microstructure of reaction products. It was found that pure products could be obtained at temperature 900°, 8 min which is lower comparing with that by conventional method. The XRD data shown the crystal belongs to tetragonal tungsten bronze structure with space group P4bm. The grain size synthesized in millimeter wave field had smaller size, narrower distribution, better sinter-ability, and without hard agglomeration comparing whit that obtaining from conventional synthesis. At lower temperature Ba5LiTiNb9O30 is a tetragonal ferroelectric phase.

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MECHANICAL PROPERTIES AND CURING KINETICS OF EPOXY RESINS CURED BY VARIOUS AMINO-TERMINATED POLYETHERS

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Chinese Journal of Polymer Science 2010年第6期28卷 961-969页

作者： Li-ying Zhao Jian-guo Guan Hui-ru Ma Zhi-gang Sun State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

A high performance thermosetting epoxy resin crosslinkable at room temperature was obtained via directly moulding diglycidyl ether of bisphenol A（DGEBA） and flexibleα,ω-bisamino（n-alkylene）phenyl terminated poly（ethylene glycol）.The influences of the n-alkylene inserted in aminophenyl of flexible amino-terminated polythers（ATPE） on the mechanical properties,fractographs and curing kinetics of the ATPE-DGEBA cured products were *** results show that the insertion of n-alkylene group into the aminophenyl group of the ATPE,on one hand,can significantly increase the strain relaxation rate and decrease glass transition temperature of the ATPE-DGEBA cured products,resulting in slight decrease of the Young’s modulus and tensile strength,and significant increase of the toughness and elongation of the ATPE-DGEBA cured *** the other hand,it can remarkably enhance the reactivity of amine with epoxy,much accelerating the curing rate of the ATPE-DGEBA *** activation energy of DGEBA cured by BAPTPE,BAMPTPE and BAEPTPE was 53.1,28.5 and 25.4 kJ·mol;,*** as-obtained ATPE-DGEBA cured products are homogeneous, transparent,and show excellent mechanical properties including tensile strength and *** they are promising to have important applications in structure adhesives,casting bulk materials,functional coatings,cryogenic engineering, damping and sound absorbing materials.

关键词： Epoxy resin Amine-terminated polyether Fractography Curing kinetics Mechanical properties

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