Shandong Shengquan Chemical Company Ltd

China

Shandong Shengquan Chemical Company Ltd

China

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Zhu B.,Wuhan University of Science and Technology | Wei G.,Wuhan University of Science and Technology | Li X.,Wuhan University of Science and Technology | Ma L.,Zhejiang Zili Co. | Wei Y.,Shandong Shengquan Chemical Co.
Proceedings of the Unified International Technical Conference on Refractories, UNITECR 2013 | Year: 2014

Structure evolution and oxidation resistance of pyrolytic carbon derived from Fe doped phenol resin in a coke bed from 600 to 1100°C were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM) and thermogravimetry-differential scanning calorimetric analysis (TG-DSC). The results show that the doping of Fe powders in the phenol resin significantly reduces the graphitizing temperature. The graphitization degree of the phenol resin increases with temperature increment in a range of 600-1100 °C. The SEM and TEM analysis show that massive onion-like carbon nanoparticles with about 150 nm in diameter are generated on the surface of dopants at the temperatures below 800 °C. With the raising of carbonization temperature, onion-like carbon nanoparticles were evolved to bamboo-shaped carbon nanotubes, which were furtherly transformed into bamboo-shaped carbon chains at 1000°C and bamboo-shaped carbon nanotubes at 1100°C, the corresponding diameter and length of formed bamboo-shaped carbon nanotubes are about 150 nm and several tens of micrometers. The oxidation resistance of the pyrolytic carbon derived from Fe doped phenol resin after carbonization at 1000°C is greatly improved in comparison with the carbon without Fe doped. The oxidation peak temperature of the former reaches 574.09 °C, much higher than 506.53 °C for the latter. © 2014 The American Ceramic Society.


Li J.-Y.,Shandong University | Sun T.,Shandong University | Hao A.-Y.,Shandong University | Qiao H.,Shandong Shengquan Chemical Co. | Xin F.,Shandong University
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

In the title compound, C12H14N2O 2, the quinoxaline ring system and the C atoms of the methylene and methyl substituents lie on a mirror plane. The crystal packing is stabilized by weak π-π inter-actions [centroid-centroid distance = 3.680 (7) Å].


Sun T.,Shandong University | Li J.,Shandong University | Qiao H.,Shandong Shengquan Chemical Co. | Hao A.,Shandong University | Li Y.,Shandong University
Acta Crystallographica Section E: Structure Reports Online | Year: 2010

The complete molecule of the title compound, C12H 12N2O2, lies on two crystallographic symmetry elements: a twofold axis and a mirror plane. In the molecular structure, the quinoxaline ring and two methylene substituents lie on the mirror plane while the other two methylene groups are disordered about the plane. The crystal packing is stabilized by weak intermolecular π-π stacking interactions with centroid-centroid distances of 3.6803 (7) Å.


Zhu B.,Wuhan University of Science and Technology | Wei G.,Wuhan University of Science and Technology | Li X.,Wuhan University of Science and Technology | Ma Z.,Zhejiang Zili Company Ltd | Wei Y.,Shandong Shengquan Chemical Company Ltd
International Journal of Materials Research | Year: 2014

Upon application of nano-sized metallic Ni particles as catalyst, the in-situ synthesis mechanism of spinel whiskers in MgO-C refractories was studied. Their phase composition and morphology were determined by means of X-ray diffraction and scanning electron microscopy supported by energy dispersive spectroscopy. The results show that when the catalyst of nano-sized Ni was added in MgO-C refractories, the granular MgAl2O4 (MA) spinels transformed into the shape of whiskers at 1 200°C. The presence of Ni catalyst can accelerate the generation of Mg vapor, which can react with Al vapor to form MA spinel whiskers. Through dissolution and precipitation, MA spinel crystals nucleate directly and grow into whiskers from the catalytic droplets of nano-sized metallic Ni particles. The growth of spinel whiskers follows a typical vapor-liquid-solid (V-L-S) growth mechanism. © 2014 Carl Hanser Verlag GmbH & Co. KG.


Zhu B.,Wuhan University of Science and Technology | Wei G.,Wuhan University of Science and Technology | Li X.,Wuhan University of Science and Technology | Ma Z.,Zhejiang Zili Co. | Wei Y.,Shandong Shengquan Chemical Co.
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | Year: 2014

Effect of carbonization temperatures on the microstructure and oxidation resistance for the carbon derived from doping modified phenol resin was investigated. The carbon structure was characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. The corresponding oxidation resistance was measured by differential scanning calorimetry. The results show that the carbonization temperature has an influence on the carbon structure derived from doping modified phenol resin. The graphitization degree of carbon structure increases with the increase of carbonization temperature. The massive carbon whiskers with the size of 50-100 nm in diameter and the nanometer-scale length are formed on the dopant surface at 600°C. The respect ratio of carbon whiskers increases with increasing the carbonization temperature. However, the quantity of carbon whiskers gradually decreases. The massive carbon microspheres with the size of 100-500 nm in diameter are generated on the surface of dopants at 1000°C. The maximum oxidation temperature for the carbon product derived from doping modified phenol resin is increased by 80°C, compared to that for resin carbon without any dopants.


Sun T.,Shandong University | Zhang H.,Shandong University | Kong L.,Shandong University | Qiao H.,Shandong Shengquan Chemical Co. | And 3 more authors.
Carbohydrate Research | Year: 2011

A modified cyclomaltoheptaose (β-cyclodextrin) containing an anthraquinone moiety, mono[6-deoxy-N-n-hexylamino-(N′-1-anthraquinone)]- β-cyclodextrin (1), which can self-assemble into nanorods in aqueous solution, was synthesized. Interestingly, upon the addition of natural cyclodextrin, the nanorods could transform into bilayer vesicles, which were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), dynamic light scattering (DLS), and epi-fluorescence microscopy (EFM). A transformation mechanism is suggested based on the results of 1H NMR, 2D NMR ROESY, FTIR, and UV-vis spectra. The response of the vesicles to changing pH and adding Cu2+ was also tested. Our research may pave the way to the development of new intelligent materials and biomaterials. © 2010 Elsevier Ltd. All rights reserved.


Zhu B.Q.,Wuhan University of Science and Technology | Wei G.P.,Wuhan University of Science and Technology | Li X.C.,Wuhan University of Science and Technology | Ma Z.,Zhejiang Zili Co. | Wei Y.,Shandong Shengquan Chemical Co.
Materials Research Innovations | Year: 2014

Using nickel nitrate as catalyst precursor, a cost effective method for large scale preparation of carbon nanotubes (CNTs) was investigated through catalytic pyrolysis of phenol resin in the temperature range of 600-1200°C under an Ar atmosphere. The morphology and structure of pyrolysed resin were characterised by X-ray diffraction, scanning electron microscope, transmission electron microscope and energy dispersive X-ray spectroscopy. The results show that the morphology and structure of CNTs depend on pyrolysis temperature, and the starting growth temperature of CNTs is ~600°C. When the pyrolysis temperature is raised, the length and crystallinity of CNTs increase remarkably. High aspect ratio and well crystallised CNTs with average diameter of about 50-60 nm and micrometer scale length could be obtained at 1000°C. Scanning electron microscopy and transmission electron microscopy analysis reveals that the catalyst particle was located at the top of each CNT, which indicates the tip growth mechanism for CNTs. The growth process of CNTs will go through the following stages: decomposition of hydrocarbon components into the carbon atoms, dissolution, diffusion and segregation. The growth of CNTs agrees with vapour-solid (V-S) model. © W. S. Maney & Son Ltd. 2014.


Wang X.,Wuhan University of Science and Technology | Zhu B.,Wuhan University of Science and Technology | Li X.,Wuhan University of Science and Technology | Ma Z.,Zhejiang Zili Co. | Wei Y.,Shandong Shengquan Chemical Co.
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | Year: 2015

Co-doping phenol resin samples with Al and Ni nanopowder were prepared via a stirring method. Effects of Al and Ni nanopowder on the microstructure and oxidation resistance of the carbon derived from phenol resin were investigated. According to the thermodynamic analysis, there are no nitrogen-containing phases in the reducing atmosphere at a high pressure of CO, and the system belongs to Al-C-O ternary. The predominance is Al2O3 phase, which increases with increasing the temperature and O2 pressure. The experimental results reveal that carbon nanotubes (CNT) and Al3C4 whiskers coexist at 900 ℃. At 1 000 ℃, there are Al3C4 whiskers and Al2O3 particles. Al3C4 phase disappears and the Al3O2 whiskers increase when temperature increases to 1200 ℃. The diameter of CNT increases from 60 nm to 100 nm with increasing the temperature. The maximum oxidation temperature for the resultant carbon derived from this modified phenol resin is 664.6 ℃, which is increased by 22% for sole doping of Ni nanopowder in resin. ©, 2015, Chinese Ceramic Society. All right reserved.


Sun T.,Shandong University | Zhang H.,Shandong University | Yan H.,Shandong University | Li J.,Shandong University | And 4 more authors.
Supramolecular Chemistry | Year: 2011

Self-assembly fluorescent vesicles were designed and prepared based on the supramolecular interaction of cyclodextrins and N-alkylamino-L-anthraquinone (n-AQ). As the guest molecules, n-AQs with alkyl lengths ranging from C 0 to C18 were synthesised by the direct reaction of alkylamine with L-nitroanthraquinone in N,N-dimethylformamide. Transmission electron microscopy (TEM), scanning electron microscopy, dynamic light scattering and epi fluorescence microscopy were employed to study the vesicle system in detail. The formation mechanism of the vesicles was suggested based on the results of TEM observation, UV spectrum, fluorescence spectrum, 1H NMR and simulation in the software Materials 4.3. The fluorescent vesicles show sensitive and multi-responsive properties to external stimuli. Based on these properties, we tried to use the vesicle as a new kind of fluorescence staining material for living cells. The vesicles can effectively stain the human breast cancer cells (MCF-7) and mice mononuclear macrophages (REW-264.7). This paper provides a better understanding in the design and preparation of drug delivery, biomaterials and intelligent materials. © 2011 Taylor & Francis.

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