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Preparation and magnetic properties of FeNi/CNxNTs composites

Gongneng Cailiao/Journal of Functional materials 2013年第12期44卷 1808-1811+1815页

作者： Zhang, Rui Li, Hui Zhang, Guo Shi, Ke-Ying Gong, Li-Hong Jing, Li-Qiang Li, Li Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education Heilongjiang University Harbin 150080 China Key Laboratory of Chemical Engineering Process and Technology for High-Efficiency Conversion College of Heilongjiang Province Heilongjiang University Harbin 150080 China College of Chemistry and Chemical Engineering Harbin Normal University Harbin 150080 China

Nitrogen-doped carbon nanotubes (CNxNTs) were synthesized by the catalysts of Fe/MgO and CoxMg1-xMoO4, and the feedstock of pyridine, diethylamine, propylamine, acetonitrile and ethylene diamine for studing the influence on the yield and the nitrogen content of the products of CNxNTs. The yield of the products synthesized by the catalysts of CoxMg1-xMoO4 and the feedstock of propylamine is the highest (920%). The CNxNTs without any acid treatment were directly decorated with FeNi alloy particles via wet-chemical method, the magnetic properties of the composite were investigated. The results indicate that Fe1-xNix/CNxNTs possess the characteristic of soft magnetic and excellent adsorption separation properties towards the organic pollutant of Rhodamine B (RhB).

关键词： Magnetic properties

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A controlling method for AgI nanoparticles preparation using combinatorial surfactants

A controlling method for AgI nanoparticles preparation using...

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IEEE Conference on Nanotechnology

作者： Dandan Liu Xianting Ding Jian Yang Zhijun Ma Weiping Wang Institute of Process Equipmentm Zhejiang University Hang Zhou CO School of Biomedical Engineering Shanghai Jiao Tong University Shang Hai CO Institute of Process Equipment Zhejiang University Hang Zhou CO 310027 USA Department of Material Engineering South China University of Technology Guang Zhou CO

ISBN: (纸本)9781479906741

AgI nanoparticle has been reported to exhibit size-dependent properties. In the paper, we reported the use of combinations of surfactants, such as AOT, SDS, PVP and TWEEN20, to control the AgI synthesis. AgI nanoparticles can be obtained with different sizes. Measured and confirmed by DLS and TEM, the nanoparticles can be massively and evenly prepared with the sizes less than 20nm. The post-processing of extraction for the nanoparticles is relatively simple and environmentally friendly. Further experimental results demonstrate that the stability of the nanoparticles is greatly dependent on the formula of the surfactant compositions. The method presented here is a potential high-throughput technique that could be applied to synthesize many other nanoparticles.

关键词： Nanoparticles Silver Educational institutions Solvents Nanowires materials Conductivity

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Synthesis and Characterization of Various Protein <i>α</i>-Lactalbumin Nanotubes Structures by Chemical Hydrolysis Method

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Advances in Nanoparticles 2013年第2期2卷 154-164页

作者： Pegah Esmaeilzadeh Zahra Fakhroueian Pouriya Esmaeilzadeh Narges Mohammadi Biomedical Material Department Institute of Pharmacy Martin Luther University Halle-Wittenberg Germany College of Chemical Engineering University of Tehran Tehran Iran Department of Chemistry College of Science Alzahra University Tehran. Iran Process simulation and control Lab. Chemical Engineering Collage Iran University of Science and Technology (IUST) Tehran Iran

New water-based nanofluids including unparalleled milk protein α-lactalbumin hollow nano-bio-tubes using low cost, available and advanced partial chemical hydrolysis strategy in bottom-up nano-assembly have been employed in this work. The aqueous sol-gel chemistry in nanotechnology which we selected for this goal offers new fabrication as interesting smart protein nanotubes. The kinds of nanometer sized tubular structures such as waved, helically coiled, bent, bamboo-shaped, bead-like and branched single-walled protein nanotubes (SWPNTs) with a range of 3 - 8 nm in outer diameters were produced by this method. Complete characterization for natural produced nanotubes including SEM, TEM images, G bond and D bond in Raman spectroscopy, XRD patterns, DLS (Dynamic Light Scattering) and FTIR analysis were evaluated which they are most significant experiments in synthesized protein nanotubes soluble in clear water nanofluids and stabilization of transparent nanofluids was proved within more than one year after preparation. Various necessary ligand ion salts such as Mn2+, Zn2+ and Ca2+ or mixtures as bridge makers and producing biological self-assembly hollow SWPNTs were performed and we focused on new chemical technology under specific acidic hydrolysis method not conventional enzymatic proteolysis and applying surfactants, pH reagent, Tris-HCl buffer, polar solvent which could be produced by β-sheet stacked hydrolysed protein α-lactalbumin mechanism under appropriate conditions to achieving high efficiency new protein nanotubes skeleton. They can be promising materials applied in food science, diet nutrition, nanomedicine, nano-biotechnology and surgery.

关键词： Nanobiotechnology Milk Protein Nanotubes Helical Self-Assembly Water-Based Nanofluids Chemical Hydrolysis Nanomedicine

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Microstructural control and mechanical properties of low-cost titanium alloys for next generation aircrafts

Microstructural control and mechanical properties of low-cos...

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8th Pacific Rim International Congress on Advanced materials and processing 2013, PRICM 8

作者： Niinomi, Mitsuo Nakai, Masaaki Itsumi, Yoshio Murakami, Shogo Oyama, Hideto Abe, Wataru Hieda, Junko Cho, Ken Akahori, Toshikazu Institute for Materials Research Tohoku University Sendai 980-8577 Japan Titanium Research and Development Section Kobe Steel Ltd. Takasago 676-8670 Japan Materials Research Laboratory Kobe Steel Ltd. Kobe 651-2271 Japan Material and Process Engineering Section Aero Space Co. Kawasaki Heavy Industry Ltd. 1 Kawasaki-cho Kagamigahara 504-8710 Japan Faculty of Science and Technology Department of Materials Science and Engineering Meijo University 1-501 Shiogamaguchi Tempaku-ku Nagoya 468-8502 Japan

ISBN: (纸本)9781632660008

New titanium alloys have been developed for use in next-generation aircrafts by adding low-cost elements such as C, Fe, Al and Cr. Some of the newly developed alloys are Ti-4.5Al-2Mo-1.6V-0.5Fe-0.3Si-0.03C, referred to as KS Ti-9, and Ti-4.5Al-2.5Cr-1.2Fe-0.1C, referred to as KS Ti-531C. As opposed to the widely used Ti-6Al-4V (Ti64), KS Ti-9 can be rolled at much lower temperatures without employing pack-rolling, and the anisotropy in its mechanical strength is significant. Microstructural control process to reduce the anisotropy in the mechanical strength of KS Ti-9 has been investigated. Anisotropy controlling treatment (ACT) is found to be effective to reduce the anisotropy in the mechanical strength of KS Ti-9. KS Ti-531C, with good mechanical properties at room temperature, similar to those of Ti64, and high hot-workability with low flow stress during deformation at high temperatures, similar to that of commercially pure titanium (CPTi), has been developed for fabricating forged or extruded components. There still exists a possibility of the precipitation of titanium carbides depending on the kind of the microstructural control process used. The mechanical properties and the fatigue strength of KS Ti-531C with different microstructures have been investigated, (α + β)-annealed KS Ti-531C with an equiaxed α structure exhibits better ductility and fatigue strength than β-annealed KS Ti-531C with the Widmanstätten α structure because of the presence of titanium carbide precipitates in the β-annealed KS Ti-531C.

关键词： Titanium alloys

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Electropolymerization of Ni(salen) on carbon nanotube carrier as a capacitive material by pulse potentiostatic method

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Science China Chemistry 2012年第7期55卷 1338-1344页

作者： LI JianLing GAO Fei ZHANG YaKun KANG FeiYu WANG XinDong YE Feng YANG Jun State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China China Electric Power Research Institute Beijing 100192China Department of Material Science and Engineering Tsinghua UniversityBeijing 100084China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of SciencesBeijing 100080China

The composites of poly[Ni（salen）] and multi-walled carbon nanotube （MWCNT） were synthesized by pulse potentiostatic method. The composites were characterized by field emission scanning electron microscopy, Fourier transform infrared spectra, and electrochemical impedance spectroscopy. The wrapping of carbon nanotubes with poly[Ni（salen）] varied significantly with anodic pulse duration. Variance of structure of poly[Ni（salen）] caused by anodic pulse duration affected the ability of absorption to solvent molecules or solvated ions, which was indicated by v （C≡N） intensity. The ability to store/release charge of poly[Ni（salen）] caused by redox switching was evaluated in the form of low-frequency capacitance. Correlations of chargetransfer resistance/ionic diffusion resistance with potential and anodic pulse duration were investigated.

关键词： poly[Ni（salen）] carbon nanotubes potential pulse electrochemical impedance spectroscopy

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Shape optimization of reactive mufflers using threshold acceptance and finite element methods

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Proceedings of Meetings on Acoustics 2013年第1期19卷

作者： Abdelkader Khamchane Youcef Khelfaoui B Hamtache Material Technology an engineering Process Laboratory Université Abderahman Mira de Béjaia Route de Targa Ouzemour Béjaia Béjaia 06000 Algeria Material Technology an engineering Process Laboratory Univesrité Abderahman Mira de Béjaia Route de Targa Ouzemour Béjaia Béjaia J5R0C6 Algeria

Recently, the acoustic performance of reactive mufflers under space constraint became important. In this paper the attenuation performance of single and double expansion-chambers under space constraint is presented using a shape optimization analysis with a novel scheme called Threshold Acceptance (TA), the best design obtained by the shape optimization method are analysed by Finite Element Method (FEM). The numerical assessment is based on the maximisation of the sound transmission loss (STL) using the Transfer Matrix Method (TMM), a modelling method based on the plane wave propagation model. The FEM solution used to analyse the STL of the shape optimized mufflers is based on the Acoustic Power method, a standard computational code COMSOL Multiphysics is used to analyse in 3D the sound attenuation of the mufflers by the FE method. The acoustical ability of the mufflers obtained is than assessed by comparing the FEM solution with the analytical method. Results show that the maximal STL is precisely located at the desired targeted tone. In addition, the acoustical performance of mufflers with double expansion-chamber is found to be superiors to the other one. Consequently, this approach provides a quick and novel scheme for the shape optimization of reactive mufflers

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Synthesis and Characterization of Various Protein α-Lactalbumin Nanotubes Structures by Chemical Hydrolysis Method

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Advances in Nanoparticles 2013年第2期2卷

作者： Pegah Esmaeilzadeh Zahra Fakhroueian Pouriya Esmaeilzadeh Narges Mohammadi Biomedical Material Department Institute of Pharmacy Martin Luther University College of Chemical Engineering University of Tehran Process simulation and control Lab. Chemical Engineering Collage Iran University of Science and Technology (IUST)

New water-based nanofluids including unparalleled milk protein α-lactalbumin hollow nano-bio-tubes using low cost, available and advanced partial chemical hydrolysis strategy in bottom-up nano-assembly have been employed in this work. The aqueous sol-gel chemistry in nanotechnology which we selected for this goal offers new fabrication as inter- esting smart protein nanotubes. The kinds of nanometer sized tubular structures such as waved, helically coiled, bent, bamboo-shaped, bead-like and branched single-walled protein nanotubes (SWPNTs) with a range of 3 - 8 nm in outer diameters were produced by this method. Complete characterization for natural produced nanotubes including SEM, TEM images, G bond and D bond in Raman spectroscopy, XRD patterns, DLS (Dynamic Light Scattering) and FTIR analysis were evaluated which they are most significant experiments in synthesized protein nanotubes soluble in clear water nanofluids and stabilization of transparent nanofluids was proved within more than one year after preparation. Various necessary ligand ion salts such as Mn2+, Zn2+ and Ca2+ or mixtures as bridge makers and producing biological self- assembly hollow SWPNTs were performed and we focused on new chemical technology under specific acidic hy- drolysis method not conventional enzymatic proteolysis and applying surfactants, pH reagent, Tris-HCl buffer, polar solvent which could be produced by β-sheet stacked hydrolysed protein α-lactalbumin mechanism under appropriate conditions to achieving high efficiency new protein nanotubes skeleton. They can be promising materials applied in food science, diet nutrition, nanomedicine, nano-biotechnology and surgery.

关键词： Nanobiotechnology Milk Protein Nanotubes Helical Self-Assembly Water-Based Nanofluids Chemical Hydrolysis Nanomedicine

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Brownian dynamics of polymer rheological properties with hydrodynamic interaction and Excluded-volume effects

Brownian dynamics of polymer rheological properties with hyd...

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UK-China Symposium of New Energy materials and Nanotechnology(2012年中英纳米技术和新能源材料研讨会)

作者： Min Zhiyu Yu jiuhua Hu Junhua Shen changyu Luoyang Institute of Science and technology Luoyang China School of Material Science and Engineering Zhengzhou University Zhengzhou China National Engineering Research Center On Advanced Polymer Process Technology ZhengzhouChina

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N‐Heterocyclic Carbene Catalyzed [4+3] Annulation of Enals ando‐Quinone Methides: Highly Enantioselective Synthesis of Benzo‐ε‐Lactones†

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Angewandte Chemie 2013年第33期125卷

作者： Hui Lv Wen‐Qiang Jia Li‐Hui Sun Song Ye Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Recognition and Function Institute of Chemistry Chinese Academy of Sciences Beijing 100190 (China) Key Laboratory for Green Chemical Process of Ministry of Education School of material science and Engineering Wuhan Institute of Technology Wuhan 430073 (China)

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Nanocomposites of Carbon Nanotube (CNTs)/CuO with High Sensitivity to Organic Volatiles at Room Temperature

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Procedia engineering 2012年 36卷 235-245页

作者： Jing Zheng Qingqing Zhang Xiaochun He Mingjun Gao Xingfa Ma Guang Li School of Environmental and Material Engineering Center of Advanced Functional Materials Yantai University Yantai 264005 P. R. China State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310027 P. R. China National Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang University Hangzhou 310027 P. R. China

In order to enhance the sensitivity of carbon nanotube based chemical sensors at room temperature operation, CNTs/CuO nanocomposite was prepared under hydrothermal reaction condition. The resulted-product was characterized with TEM (transmission electron microscopy), XRD (X-ray diffraction) and so on. A chemical prototype sensor was constructed based on CNTs/CuO nanocomposite and an interdigital electrode on flexible polymer substrate. The gas-sensing behavior of the sensor to some typical organic volatiles was investigated at room temperature operation. The results indicated that the carbon nanotube was dispersed well in CuO matrix, the CuO was uniformly coated on the surface of carbon nanotube, and the tubular structure of carbon nanotube was clearly observed. From morphology of TEM images, it can also be observed that a good interfacial adhesion between CNT and CuO matrix was formed, which maybe due to the results of strong interaction between CNTs with carboxyl groups and CuO containing some hydroxy groups. The CNTs/CuO nanocomposite showed dramatically enhanced sensitivity to some typical organic volatiles. This study would provide a simple, low-cost and general approach to functionalize the carbon nanotube. It is also in favor of developing chemical sensors with high sensitivity or catalysts with high activity to organic volatiles at low temperature.

关键词： Carbon nanotube (CNTs) CuO nanocomposites organic volatiles sensitivity improvement chemical sensors

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