Wang Y.-J.,Tianjin Polytechnic University |
Wang B.,Tianjin Polytechnic University |
Liu W.,Tianjin Institute of Technical Physics
Acta Polymerica Sinica | Year: 2013
A series of molecularly imprinted polymers were synthesized via the electron beam radiation polymerization of functional monomer (methacrylic acid) and crosslinking agent (ethylene glycol dimethacrylate) in the presence of quercetin-Ni (II) as template and were used as a highly selective separation material for quercetin which is an important active ingredient of Chinese herbs. The interaction between quercetin and Ni(II) was investigated with UV-Visible spectroscopy, which reveals the formation of 1:2 complex in the system. At the same time, the ternary complexation of quercetin, Ni(II) and methacrylic acid was verified by similar methods. The characterization of the molecularly imprinted polymer prepared and pure quercetin was analyzed by Fourier transform infrared spectra. The result indicated that the template molecule could be fixed in molecularly imprinted polymer and also could achieve being eluted. Furthermore, the transmission electron microscopy and adsorption dynamic experiments were used to characterize the effect of radiation dose on the morphology and adsorption capacity of molecularly imprinted polymer. The result showed that the three-dimensional cross-linked network structure of the molecularly imprinted polymer prepared in condition of 20 kGy radiation dose was more uniform, and the presence of these internal pores greatly increased the surface area of molecularly imprinted polymer and reduced the embedding of imprinting sites, which was conducive to adsorb the template molecule. In addition,the selective adsorption experiments showed that the molecularly imprinted polymer prepared exhibited significant adsorption selectivity for quercetin compared with the quercetin' s structural analogs (baicalein and naringenin) in the presence of Ni(H) and the max adsorption amount reached 82.22 μ,mol/g. The separation factors were 3.915 and 5.443, respectively.
Ma J.,Huazhong University of Science and Technology |
Yu W.,Huazhong University of Science and Technology |
Zhou Z.,Tianjin Institute of Technical Physics |
Yang W.,Huazhong University of Science and Technology |
Wu X.,Huazhong University of Science and Technology
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2016
Dual wedge scanning is a broad prospect method of next generation Laser imaging system. Due to the unique scanning mode and imaging characteristics, data of dual wedge Laser imaging system is sensitive to parameters and environment, and it is significant in both theory and application to research its feature of time and space. Based on the imaging principle of dual wedge scanning, the dynamic imaging process was modeled and a simulation system in three-dimensional environment was designed. Based on the imaging principle of dual wedge scanning, the dynamic imaging process was modeled and a simulation system in three-dimensional environment was designed. Then the point cloud data simulated in different scenes of distinct parameters was analyzed in several aspects. The research result can be used to verify the performance of the three-dimensional object detection and recognition algorithms, in addition, it has reference value for design and development of the dual wedge scanning Laser imaging system. © 2016, The Editorial Board of Journal of System Simulation. All right reserved.
Yu L.,Tianjin Polytechnic University |
Wang F.,Tianjin Polytechnic University |
Niu P.,Tianjin Polytechnic University |
Xu W.,Tianjin Polytechnic University |
And 3 more authors.
Guti Dianzixue Yanjiu Yu Jinzhan/Research and Progress of Solid State Electronics | Year: 2010
The influence of low-energy low-dose electron-beam irradiation on the light emitting diode (LED) has been studied in this paper. Using the space electron-beam irradiation simulated by ion-beam emitted from experimental accelerator, the LED emitting different color light were irradiated under the different electron irradiation dose. We compare the optical and electronical character results of the initial and irradiated LED. The results demonstrate that the light intensity of irradiated LED increases and the discrete property of the statistical light intensity of plenty of LED is better. During the current accelerated aging experiment, the light intensity of the irradiated LED trends to significant decreasing compared with the initial LEDs. Using the electron beam irradiation mechanism the experiment results are discussed and analysed.
Liu W.,Tianjin Institute of Technical Physics |
Hao J.-G.,Tianjin Institute of Technical Physics
Journal of Tianjin Polytechnic University | Year: 2011
In order to solve the problem that the polyester fibers are easily melting and catching fire, the electron accelerator is used to radiate the polyester fibers for modification. The influence of different radiation amounts and different monomers (methacrylic acid, acrylic acid, acrylamide) to the graft ratio is studied, and the properties of the fiber after grafting are analyzed. The results show that the graft ratio raises with the radiation amounts and monomers concentration moderately increasing; the fiber after radiation doesn't have the droplet phenomenon, and the flame retardant property of the fiber is improved.
Tong Y.,Tianjin Institute of Technical Physics |
Chen J.,Tianjin Institute of Technical Physics |
Sun L.,Tianjin Institute of Technical Physics |
Yu X.,Tianjin Institute of Technical Physics |
Wang X.,Tianjin Institute of Technical Physics
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014
The optical glass is hard, brittle and difficult to process. Based on the method of rotating ultrasonic drilling, the study of single factor on drilling elongated holes was made in optical glass. The processing equipment was DAMA ultrasonic machine, and the machining tools were electroplated with diamond. Through the detection and analysis on the processing quality and surface roughness, the process parameters (the spindle speed, amplitude, feed rate) of rotary ultrasonic drilling were researched, and the influence of processing parameters on surface roughness was obtained, which will provide reference and basis for the actual processing. © 2014 SPIE.