Advanced Materials Research Vols. 306-307

Abstract: Mesoporous SAPO-11 was synthesized hydrothermally by using carbon black and di-n-propylamime (DPA) as templates for the expected mesopores and micropores respectively. The samples were characterized with XRD, nitrogen physisorption, SEM and NH₃-TPD techniques. The mesopore volumes of mesoporous SAPO-11 are in range of 0.037 - 0.052 cm³/g. The same amounts of the acid sites according to NH₃-TPD results in both mesoporous and conventional SAPO-11 products indicate that the carbon black involved in the synthesis doesn’t affect the crystallization efficiency of SAPO-11. The mesoporous SAPO-11 samples exhibit higher activity compared with conventional ones, especially under low reaction temperature. The enhanced activity can be attributed to the introduction of the mesopores in the zeolite crystals, which decreases the intracrystalline mass transfer limitations.

Abstract: In this paper, the application of peroxide: sodium percarbonate and hydrogen peroxide, in the chemical degumming process of ramie was discussed. Two kinds of effects of peroxide degumming process were analyzed. On the basis of that, the fiber properties of degummed ramie of oxidation degumming process and the traditional chemical degumming process were compared. The result showed that two kinds of peroxide can be effectively applied to the chemical degumming process of ramie. In comparison with the traditional chemical degumming process, there are many advantages in the oxidation degumming process, for example, short flow, saving in energy, less environmental pollution, high single fiber strength, high whiteness, less fiber strand and so on.

Abstract: In this paper,bamboo pulp was chosen as the raw material on the basis of the researching on the structure and properties of the resource-rich bamboo fibers, the foaming material using the bamboo pulp and other assistants were obtained.It developed bamboo's new applied area and supplied the cushioning industry with a new choice.The best reagent and the optimal ratio of the various components have been identified by the quality evaluation system. Studied on the high efficiency and no polluting foaming mechanism to determine the parameter of foaming technics. Determined the interior adhesive and exterior disposal.Conducted the structural analysis and mechanical properties testing, and in compare with the performance of common cushioning material,we know that: Material has a certain buffer performance and for the packing of the products with small shock fragility.

Abstract: In order to prepare high activated ground granulated blast furnace slag (GGBFS), tetra-isopropyl titanate was used to process GGBFS in this study. Internal standard method of infrared spectroscopy (FT-IR) was used to study the activation extent of GGBFS influenced by the concentration of tetra-isopropyl titanate, activation temperature and time. The FT-IR analyses showed that the extent of GGBFS coupling reaction was the highest, when the accelerating agent was 0.6%, the concentration of tetra-isopropyl titanate, activation temperature, activation time were 1%, 100°C and 30min, respectively. The GGBFS which is activated by tetra-isopropyl titanate remarkable improves the mechanical properties of artificial marble.

Abstract: A new coagulant, organic poly-silicic-ferric (OPSF) was prepared by adding dimethyldiallylammonium chloride (DMDAAC) in poly-silicic-ferric (PSF) coagulant. The process of floc’s formation and settlement during the coagulation process was investigated, in comparison with that of PSF. The results show that OPSF gave higher speed of floc formation and precipitate than PSF, and large flocs of OPSF were formed faster than PSF. The floc density of OPSF was greater than that of PSF, thus leading to much less amount of OPSF flocs in the supernatant than that of PSF after basically full settlement.

Abstract: Based on the fouling mechanism of polymeric ultrafiltration membrane, the mathematical model to describe the fouling process of polymeric surface active layer is established according to resistance equation, Darcy’s law, convection-diffusion equation and dynamic adsorption equation. The effect of solution concentration on permeating flux is investigated by means of finite element simulation, and the validity of the research approach is verified. The reasons why the flow flux declines are analyzed quantitatively, which gives a vivid description of the fouling process.

Abstract: The shockproof foam (EPE) was screened out as a cheap and efficient oil-absorbing material in this paper. The influences of the particle size, the time of oil-absorbing, the aperture size of waste plastics, oil slick thickness on the oil-absorbing properties were investigated. The second and third time oil-absorbing capacities were also discussed. The results showed that (a) the best conditions of recovering spilled oil by use of shockproof foam (EPE) were as follows: the size of particle was 5mm, the time of absorption was 15 min, and the thickness of oil layer was more than 2 mm. (b) After appropriate pressing and centrifugal deoiling, the quality of oil-absorbing was effective in second and third time. The saturated oil-absorbing capacity reached to 30g/g. The double control effect was achieved by waste to pollution.

Abstract: The influence of ultraviolet radiation on photo-degradation of dyed veneer surfaces of Betulacostata Trautv has been examined in this study. Dyed veneer powder specimens were irradiated with a 45-watt UV light source and exposed 100 hours were analyzed and characterized for color, crystallization performance and microstructure changes by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that dyed veneer powder specimens took a remarkable change (photo-discoloration) in color with increasing irradiation time. The lattice structures of crystallite in wood cellulose were not destroyed by UV radiation, and the two theta angles and layer spacing d in crystallite were constant. The relative crystallinity of dyed wood presented an increase at initial period of exposure which decreases upon prolonged exposure, but the change was not apparent, no greater than 3%. Wood microstructure has exhibited obvious deterioration, pit membrane in wood cell walls as well as wood fiber surface stripping phenomena. Analysis of the crystal properties changes and SEM measured indicate that photo-degradation of dyed veneer is mainly due to dye stuffs in prophase and based on wood in anaphase.

Abstract: This paper provides a model of strategy-oriented management of environment performance of Party and government leaders at the county and municipal levels, framworked by culture, procedure and basic guarantee system together for management of environment performance of Party and government leaders at the county and municipal levels; it emphatically narrates the strategy-oriented management procedure of environment performance of Party and government leaders at the county and municipal levels, composed of seven stages: the making of environmental protection strategies of county and municipal governments, the formulating of key performance indicators and plans of environmental protection and plans of Party and government leaders at the county and municipal levels, implementation and evaluation of performance, feedback and application of performance evaluation results; besides, it also analyzes differences between the strategy-oriented performance management and the traditional performance management.

Abstract: The dissolve behavior and cathode protection performance of Al-Zn-In-Mg-Ti anode was studied by electrochemistry impedance spectrum technology, weight-loss measurement and SEM in natural corrosion and self-discharge experiment. The results show that the 7A52 corrosion rate was decreased at a certain extent which under the protection of sacrifice anode in the self-discharge experiment, but the protection was inefficient and sacrificial anode corrosion products fell off uneasily. Natural corrosion sacrifice anode surface influenced by the corrosion product and the oxide film, the number of active pot was reduced with the progress of experiment.