Advanced Materials Research Vols. 482-484

Abstract: Transformation of textile industry is a very urgent mission for China. Our present problems include decreasing of profit from export, increasing of cost (labour and energy), competition from other developing countries, and lack of innovative products, etc. In order to increase the profit and find new future, some studies have been tried to explore some innovative methods to shift traditional textile produce patterns. This paper discusses some design examples from a perspective of developing branded finished products for consumer markets to instead of providing fabric materials. A detailed case study on the full-fashioned woven good is demonstrated here to explain some chances, advantages, disadvantages, and threatens. It is believed that the transformation of textile industry in China has to be tied with our own innovation of advanced technology and creative design concepts, which can provide some solution to the coming problems of environment, energy, and labour, etc.

Abstract: Hexagonal ZnS nanostructured spheres self-assembled from ZnS nanocrystals were successfully synthesized through a facile hydrothermal method using 1-butyl-3-methlyimidazole thiocyanate ([BMIM][SCN]) as both sulfur source and capping ligand. By combining the results of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM), ultraviolet–visible (UV–vis) absorption spectra, a structural and morphological characterization of the products was performed. The photocatalytic activity of ZnS microspheres had been tested by degradation of Rhodamine B (RB) under UV light compared to commercial ZnS powders, which indicated that the as-syntherized ZnS spheres exhibited enhanced photocatalytic activity for degradation of RB.

Abstract: The sphere-like nano-Cu2O was prepared by chemical precipitation and reduction method, the different size of sample was obtained by adjusting reaction temperature and concentration of NaOH solution. Cu2O was characterized by XRD and SEM, respectively. The results indicate that the homogeneity of Cu2O particles is related to the reaction temperature while the crystal type to the concentration of NaOH solution. The effects of the different particle size on the photocatalytic properties in the treatment of chromium(Ⅵ)-containing water was performed, the results show that there exists an important relationship between them, that is the excellent properties can be obtained with smaller size of Cu2O.

Abstract: Spherical molybdenum powders were synthesized by (RF) plasma with irregular molybdenum powders. The powder characteristics and spheroidization efficiency of the feeding rate for obtain the spherical molybdenum powders were studied. The phase composition and morphological properties of the powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). As a result, the fine spherical powders composed of pure molybdenum with favorable dispersity and its surface became smooth. The spheroidization efficiency of synthesized powders was almost 100 % at feeding rate of 5g/min. LMS analysis indicated that the as-prepared powder had narrow particle size distribution and the spheroidization efficiency of the sample decreases gradually as increasing of the feeding rate. The RF plasma spheroidization of molybdenum powder is an ideal route synthesis of well- spherical molybdenum powders used as near net-shape technology and powder metallurgy.

Abstract: ZSM-5 zeolite was chemical activated by using NaOH solution to enhance the adsorption efficiency to Cu2+ in aqueous solution. The equilibrium isotherm of NaOH activated ZSM-5 zeolite showed that the Langmuir model gave a better fit to the experimental data. The maximum adsorption capacity of NaOH activated ZSM-5 zeolite was 40.49 mg/g. The adsorption capacity was increased nearly 3.3 times than unactivated zeolite by using 0.4M NaOH. The kinetics study showed that the pseudo-second-order kinetics model could be used to describe the adsorption process satisfactorily. The research also found that the coexisting of Pb2+ ion would greatly decrease the adsorption efficiency of activated zeolite from 99.35% decreased to 56.52%. Both ZSM-5 zeolite and NaOH activated ZSM-5 zeolite was characterized by SEM.

Abstract: Bismuth sodium titanate (Bi_0.5Na_0.5TiO₃ , abbreviated as BNT) nanoparticles were synthesized by hydrothermal process at various temperatures for 10 h. The results showed that all the as-prepared nanopowders are well crystallized and the crystallite size increased with the increase of hydrothermal temperatures under the reaction conditions.

Abstract: The magnetic ground state structure of the metallofullerene Ce@C₈₂ is confirmed by the density functional calculations. The results show that the Ce atom is located inside the C₈₂ cage with site at the C₂ symmetry axis. The effective magnetic moment of Ce@C₈₂ is increased relative to the value of a free Ce³⁺ ion. The reason is that there is hybridization between unoccupied Ce-4f states and carbon-π states, which result in a general ferromagnetic coupling of the Ce-4f spin with the remaining unpaired spin in the hybridized molecular orbital.

Abstract: The rheological behavior of PA1010/POE/OMMT nanocomposites was studied by using XLY-Ⅱ rheometer. The curves of lgτ_ω～lgγ’_ω, lgη_a～lgγ’_ω, lgη_a～1/T were obtained. The experimental results showed that PA1010/POE/OMMT nanocomposites were pseudoplastic fluid. The apparent viscosity of the blends reduced with the increase of the shearing stress．Compared with PA1010/POE blends, the addition of OMMT increased the apparent viscosity. The viscous activation energy of PA1010/POE/OMMT blends declined as the increase of shearing stress, which indicated that the PA1010/POE/OMMT blends could be processed over a wide temperature at a high shearing stress.

Abstract: The effect of carrier gas temperature on entrainment characteristics of Geldart group C powder from solid mixtures (groups A and C) were investigated in a fluidized bed, which was 40mm in inner diameter and 150mm in height. Silicon powder of mean size 2.2μm was adopted as entrained material (group C), hollow alumina pellets of mean size 775μm were used as coarse particles (Group A), and industrial nitrogen (99.5%) was applied as carrier gas. mixture of silicon powder (50g) and alumina pellets (50g) were used as bed materials. The nitrogen flow rate varied from 1.5m³/h to 2.5m³/h, and the nitrogen temperature varied from 60°C to 120°C. The experimental results revealed that the bed materials were in good fluidizaton state at all of the experimental conditions. At given nitrogen flow rate, the entrainment rate constant and powder gas ratio increased at the same rate as the nitrogen temperature increased. When nitrogen temperature increased from 60°C to 120°C, the entrainment rate constant and powder gas ratio increased over 140%. The phenomena indicted that increasing carrier gas temperature was an effective method to improve entrainment characteristics of ultrafine powders.

Abstract: Through FLUENT numerical simulation, this paper is aimed on studying the influence of outdoor wind environment on indoor environment. We found that building height, building layout format and opening format in the wall are significant impacted on indoor natural ventilation. At the three-fourth height of building, if the building layout and housing opening is stagger, it can get high-quality indoor natural ventilation and more evenly indoor wind field.