We prepared a novel hybrid membrane by doping recast Nafion @ membrane with SiO 2 -CNTs composites where carbon nanotubes (CNTs) were decorated with SiO 2 nano-particles. SiO 2 -CNTs were prepared via sol-gel method...
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ISBN:
(纸本)9781424435432;9781424435449
We prepared a novel hybrid membrane by doping recast Nafion @ membrane with SiO 2 -CNTs composites where carbon nanotubes (CNTs) were decorated with SiO 2 nano-particles. SiO 2 -CNTs were prepared via sol-gel method, and then mixed with nafion resin through sonication. Hydrophilic SiO 2 nano-particles were chosed to increase the water uptake of hybrid membrane, and the CNTs were chosed to improve the mechanical property of hybrid membrane. A series of tests show that water uptake and thermal performance¿two key performance of proton exchange membrane (PEM) are improved.
In this paper, the effect of particle size on the dynamic behaviour and deformed microstructure in pure Al matrix composites reinforced with 30% ansd 40% volume fraction of 6, 13.5 and 50 μm SiC particles was investi...
In this paper, the effect of particle size on the dynamic behaviour and deformed microstructure in pure Al matrix composites reinforced with 30% ansd 40% volume fraction of 6, 13.5 and 50 μm SiC particles was investigated by using split Hopkinson pressure bar (SHPB). Firstly, the dynamic compressive stress-strain curves of SiCp/Al composites with 3 different particle sizes were obtained and the effect of the particle size on the stress-strain relationship was studied by a comparison analysis. Furthermore, the microstructure characteristics after the impact were observed by the scanning electron microscopy(SEM). The microstructure of SiCp/Al composites with 3 different particle sizes after the impact was compared. The results have demonstrated that the dynamic mechanical behaviour and the microstructure after the impact strongly depends on the particle size. The cracked particles and debonding are more readily observed in the composites reinforced with large particles than those in the composites with small particles.
Highly ordered TiO 2 nanotube arrays prepared by electrochemical anodization gets considerable interest as a practical air purifier, since the nanotube arrays can form a TiO 2 film with a porous surface and straight...
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ISBN:
(纸本)9781424435432;9781424435449
Highly ordered TiO 2 nanotube arrays prepared by electrochemical anodization gets considerable interest as a practical air purifier, since the nanotube arrays can form a TiO 2 film with a porous surface and straight gas diffusion channel. Here, we investigate photocatalytic decompositions of HCHO over TiO 2 and Ag/TiO 2 nanotube arrays. Compared with the pure TiO 2 nanotube arrays with similar thickness and geometric area, the results showed that Ag loading TiO 2 nanotube arrays within a certain range could significantly improve the degradation rate of HCHO, the main product of HCHO degradation was detected to be CO 2 .
Bulk heterojunction polymer solar cells, based on thin films of polymer/fullerene blends, have progressed rapidly during the past few years. Efficiencies over 6% have been achieved in research labs. In this chapter, a...
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Silver nanoparticles were prepared by pulsed wire discharge (PWD) using silver wire in deionized water at various relative energy (K) from 10 to 98, which is ratio of the charged energy of the capacitor in the electri...
Silver nanoparticles were prepared by pulsed wire discharge (PWD) using silver wire in deionized water at various relative energy (K) from 10 to 98, which is ratio of the charged energy of the capacitor in the electrical circuit to the vaporization energy of the wire. From energy deposition calculated by the measured voltage and current waveforms, deposited energy of the wire was increased with increasing K. From X-ray diffraction (XRD) analysis, prepared nanoparticles were phase identified as silver. From transmission electron microscopy observations, the shape of prepared silver nanoparticles were spherical and the median particle diameter (D50) and the geometric standard deviation (σg) were calculated from the particle distribution. D50 was decreased from 34 to 19 nm with increasing K. The particle size in prepared by PWD in liquid media can be controlled by K.
A novel method based on radio frequency magnetron sputtering tailored to the deposition of low residual stress and adherent c-BN thin films on silicon substrates was developed. In this study, the effect of noble gas (...
A novel method based on radio frequency magnetron sputtering tailored to the deposition of low residual stress and adherent c-BN thin films on silicon substrates was developed. In this study, the effect of noble gas (Kr, Ar, Ne and He) added in Ar gas during sputtering on the residual stress and the c-BN content has been investigated. As a result, it was found that the residual stress of c-BN thin film decreased with increasing the helium gas flow rate within argon gas.
Pb0.95Sr0.05[(Mn1/3Sb2/3) 0.06(Ni1/2W1/2)x(Zr 0.49Ti0.51)1-x-0.06]O3 (PMS-PNW-PZT) (x = 0.01∼0.04) were prepared by using traditional technique with solid reaction process. The effects of PNW contents and sintering t...
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Pb0.95Sr0.05[(Mn1/3Sb2/3) 0.06(Ni1/2W1/2)x(Zr 0.49Ti0.51)1-x-0.06]O3 (PMS-PNW-PZT) (x = 0.01∼0.04) were prepared by using traditional technique with solid reaction process. The effects of PNW contents and sintering temperatures on microstructure, dielectric and piezoelectric properties of PMS-PNW-PZT ceramics were investigated. When the amount of doping content was about 2 mol% and the sintering temperature was 1250°C, the optimum values of buck density, mechanical quality factor, dielectric loss, piezoelectric constant, dielectric constant, planar coupling coefficient were obtained as follows:ρ = 7.54 g/cm3, Qm = 2800, tanδ = 0.27%, d33 = 360pC/N, Ε3T3/Ε0 = 1990, kp = 0.63, which can meet the requirements of piezoelectric transformers.
Structure characterization and elastic properties of tetragonal phase of zirconia have been investigated by density functional theory (DFT). The XRD spectrums and vibration properties of Raman active modes of T-ZrO2 w...
Structure characterization and elastic properties of tetragonal phase of zirconia have been investigated by density functional theory (DFT). The XRD spectrums and vibration properties of Raman active modes of T-ZrO2 were calculated and the results were compared with references. The calculated results have showed researchers may distinguish cubic and tetragonal phases used XRD spectrums in the 2 range of 72.5°-75.5°, 122°-129° and 138°-148°. The calculated vibrated properties of Raman active modes as follows: the modes of Zr-O stretching are 262.6, 486.2, and 641.6 cm−1 the modes of Zr-O bending and O-O coupling are 344.4 and 606.9 cm−1 and the modes of Zr-O-Zr or O-Zr-O bending is 141.2 cm−1.
It is found that the mechanical properties of welded joints is mainly related to the welding heating input and complicated mutual effects in multi composition welding material. According to this principle, a soft sens...
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Alkali recovery aiming at recovering NaOH is the best available technology in China's pulp and paper industry;an alkali recovery boiler is a popular one among all alkali recovery units. For the purpose of designin...
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Alkali recovery aiming at recovering NaOH is the best available technology in China's pulp and paper industry;an alkali recovery boiler is a popular one among all alkali recovery units. For the purpose of designing the most reasonable tube-panel of an evaporator in a 1500 t/d alkali recovery boiler, a total of 8 kinds of cases are put forward for finite element analysis. The modeling, meshing and calculation are carried out for each case. The stress values and their distribution rules are revealed in this paper. The slotting size for the water tubes panel is analyzed by using the optimum design module of ANSYS. After all cases are compared with each other, the optimal one is developed and exemplified in conclusion.
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