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Luo Y.-H.,Nanjing Southeast University | Yang L.-J.,Nanjing Southeast University | Han G.,Henan Ancai Hi Technology Co. | Liu Q.-L.,Nanjing Southeast University | And 3 more authors.
Journal of Molecular Structure | Year: 2014

Crystal structural investigations and Hirshfeld surface analysis of three halogen atoms (4-Cl, 6-Cl and 4-Br) substituted indole-3-acetonitrile (IAN) were reported in this work. The structures of the present three compounds were characterized by Infrared spectra, Elemental analyses, NMR spectra, differential scanning calorimetry (DSC), thermogravimetric analyses (TGA) and hot stage microscopy (HSM). The Hirshfeld surfaces analysis in terms of crystal structure, intermolecular interactions and π⋯π stacking motifs were performed. We found that the different kinds of halogen atoms and the different substituted positions have a significant effect on the crystal structures, molecular π⋯π stacking motifs, melting points, and the nature of intermolecular interactions for IANs. © 2014 Elsevier B.V.

Wei L.,Dalian Maritime University | Duan S.,Dalian Maritime University | Wu Q.,Dalian Maritime University | Wu J.,Dalian Maritime University | Guo W.,Henan Ancai Hi Technology Co.
Advanced Materials Research | Year: 2012

The purpose of this paper is to find a method to study the lubrication character of the main bearings and load condition of the crankshaft about the marine two-stroke diesel engine. Based on the finite element method, multi-body dynamics, elastohydrodynamic and Green-Tripp theory about contact, the simulation of coupling between the elastic crankshaft and engine block is carried out. The load of main bearings, the minimum of oil film thick, orbital path of journal, average of asperity contact pressure are explored. The results indicate that the lubrication is good except No.2 main bearing. Parts of main bearings appear three peaks in a working cycle, which shows that above theory and elastic crankshaft and engine block is obligatory to simulate the lubrication and load condition accurately. © (2012) Trans Tech Publications, Switzerland.

Chen L.-J.,Henan Polytechnic University | Xing B.-L.,Henan Polytechnic University | Ma Y.-F.,Henan Polytechnic University | Ma Y.-F.,Henan Ancai Hi. Technology Co. | Xu B.,Henan Polytechnic University
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | Year: 2013

Coal-based activated carbon(AC)was prepared from Indonesia lignite by KOH activation, then the ACs were modified by ammonia water under the condition of high pressure. Using the N2 adsorption instrument and Fourier transform infrared spectroscopy (FTIR) represented the pore structure and surface chemical properties of activated carbon, and measured the electrochemical performance of electrodes made by activated carbon in the 3 mol/L KOH electrolyte. The results show that the specific surface area and pore structure of ACs modified by ammonia water are changed a little under high pressure, while N atoms on the surface of activated carbon increase, and nitrogen-containing functional groups such as C-N, N-H and -NO2 are loaded on the activated carbon surface. The specific capacitance of modified activated carbon electrodes can reach 348 F/g, which is increased by 27%. The conductivity and cycling performance are improved after the modification. The residual specific capacitance can reach 98.9% after 1 000 times charge and discharge under the electric current density of 42.5 mA/g.

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