Applied Mechanics and Materials Vols. 713-715

Abstract: To research the grading applicability of Lucobit modifier and make it adapt to China's basic national conditions very well, the gradations of SUP-20 was selected to research mix design and pavement performance in the text. First, the mix design of SUP-20 without Lucobit is researched. Then the performance of SUP-20 is verified including the high temperature, low temperature and water stability performance of common asphalt mixture. At last the performance comparison between SUP-20 asphalt mixture with 7% Lucobit and without is carried out. Results show that the performance of SUP-20 asphalt mixture with 7% Lucobit and without can all meet the requirement. Compared with the performance of SUP-20 asphalt mixture without Lucobit, the low temperature and water stability performance with Lucobit have a little improvement and the high temperature performance improves a lot. So Lucobit modifier can greatly improve the high temperature performance of SUP-20 asphalt mixture.

Abstract: A thermo-mechanical numerical model for high speed milling hardened SKD11steel is developed to study the influences of mechanical load and thermal load on residual stresses for each feed. The residual stresses are predicted, which are induced by high speed milling hardened SKD11 steel. Based on a simplified two-dimension assumption, the continuous feed numerical model of high speed milling hardened SKD11 steel is developed. A modified Johnson–Cook (J-C) model considering the effect of phase transformation on flow stress is employed to model residual stresses. The results show that residual stresses dominate over the mechanical load and its impact becomes more and more significant for the posterior cut. The tensile surface residual stresses of posterior cut becomes larger than the previous cut but the work hardening thickness of posterior cut becomes thinner in the condition of this study.

Abstract: Flavonoids extracted from Castanea mollissima Blume shell using response surface methodology by ultrasonic-assisted. The effects of liquid/ materials ratio, ethanol concentration, ultrasonic temperature, and ultrasonic time on the flavonoids extraction rate were investigated by Box-Benhnken center composite design. The results showed that the optimum conditions were as follows: liquid/ materials ratio 8:1 (mL/g), ethanol concentration 40 %, ultrasonic temperature 60 °C, and ultrasonic time 25 min, the highest absorbance was obtained under the optimum conditions, and the extract absorbance can be reached 0.702.

Abstract: Sediment was important storeroom of pollutants and acted as the"source"and the"sink"role ^[1-2]. Phosphorus not only was a important biogenic elements but also a major limiting factor of water eutrophication.Primary productivity of water bodies was effected by phosphorus migration and circulation in interact of sea-land^[3]. As we all known,crustal abundance of iron was 6.71% and ranked fourth, it was trace elements that played an important role in activities of human life, meanwhile ,growth of planktonic algae was limited by iron. Iron has a strong absorption features because of its oxide surface features .Circulation and transformation of phosphorus were effected by geochemical cycling of iron^[4-6]. Studies have shown^[7-8]that total of phosphorus and iron can be used as an important indicator what evaluated the degree of pollution. Released phosphorus of sediments was an important factor that effected nutritional status of water bodies. TP through physical,chemical,biological effected were combined with andiron and other minerals. So, determinating TP and TFe of sediment and analyzing its relevance were very important, it could further reveal the pollution status of water and analysis the pollution trends .

Abstract: In situ growth of TiO₂ nanocrystals on the surface of schorl was realized via Sol-Gel method in this work. The obtained TiO₂/schorl composite photocatalysts were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). An active dye, Methyl Orange (MO), was used to evaluate the photocatalytic activity of TiO₂/schorl composite photocatalyst. The effect of sintering temperature and time on the photocatalytic activity of TiO₂/schorl was emphasized in this work. XRD results indicated that TiO₂ existed in the form of anatase only when the temperature was less than 550°C, and the sintering time was less than 2.5h. Higher sintering temperature and longer sintering time could impel the appearance of rutile phase. SEM observations revealed that the nanosized particles of TiO₂ were well dispersed and immobilized on the surface of schorl. The optimum preparation conditions of TiO₂/schorl composite with best photocatalytic activity were that sintering temperature was 550°C and sintering time was 2.5h.

Abstract: An active dye, Methyl Orange (MO) was employed as the target pollutant to evaluate the photocatalytic activity of TiO₂/schorl composite and the kinetics and thermodynamics of this process was emphasized in this work. Langmuir–Hinshelwood kinetic model was employed for the kinetic studies and the results revealed that the process of MO photocatalytic discoloration by TiO₂/schorl composite followed one order reaction kinetic equation under different conditions. The reaction rate constant (k) increased with initial MO concentration decreasing. When the catalyst dosage or solution pH increased, k values increased and then decreased. The possible reasons for these phenomena were discussed. Finally, the thermodynamic parameters ΔG, ΔH, ΔS were obtained by the classical Van't Hoff equation.

Abstract: Using diallylamine , hydrochloric and dimethyl diallyl ammonium chloride as reactants, ammonium persulfate / sodium sulfite as initiation system,binary polymer was prepared in water phase.The binary polymer was applied to cotton of reactive dyeing as a fixing agent,propreities of fixing fabric were tested.The results showed that the optimum synthesis conditions were as follows: 50 g of diallylamine, 600 g of 40% dimethyl diallyl ammonium chloride,6 g of ammonium persulfate, dropping of initiation at 80°C for 3 h.The reactive dyeings after binary polymer treatment had fairly good color fastness with 4-5 grade to dry rubbing,4 grade to wet rubbing, color fastness with good to soaking and formaldehyde-free.

Abstract: Silicone-modified phenolic resin was prepared by synthesizing phenol, formaldehyde and phenyltrimethoxysilane, which were supported by Fourier Transform Infrared Spectoscopy (FT-IR). The carbon residual rate of Silicone-modified phenolic resin increased steeply when the silicone modifier was added increasing from 5% to 15%(on resin base) which was tested in an air atmosphere,from room temperature to 800 °C by Thermogravimetric Analysis (TG) ,modified resin of 15% silicone modifier had the highest carbon residue rate. Curing process of silicone-modified phenolic resin determined by Differential Scanning Calorimetry (DSC) was: 80°C/4h+100°C/2h+120°C/2h+160°C/3h+180°C/2h. Curing Kinetic Study on silicone-modified phenolic resin was made to understand the curing process better.

Abstract: Viscose fibers (VF) are widely used because of its good bio-compatibility and the adsorbent performance. In this paper, adsorbent fibers were obtained via wet spinning method with the mixed solution of activated carbon dispersion and viscose. The characterization of activated carbon/viscose fibers (ACVF) were evaluated by infrared spectroscopy (IR) scanning electron microscope (SEM) and Thermo gravimetric (TG). The results showed that activated carbon had already doped to the viscose. Benzene adsorbent performance research indicates that the adsorbent capacity of ACVFis better than VF.

Abstract: A continuous membrane-less anaerobic fluidized bed microbial fuel cell was used to investigate the effects of fluidization parameters on the electro-genesis capacity of the microbial fuel cell. The experimental results indicated that active carbon particles could significantly decrease the start-up time and increase the output voltage of the fluidized bed microbial fuel cell. At steady state operating conditions, the microbial fuel cell output voltages were 700~900 mV and 600~700 mV for with and without the active carbon particles, respectively. The fluidization behavior of the active carbon particles in the microbial fuel cell reactor is one of the key parameters that influences the generation of electricity. The experimental results indicated that to obtain the optimal electric production performance, an appropriate flow velocity should be determined. The fluidized bed microbial fuel cell could be operated in large-scale wastewater treatment processes with high Chemical Oxygen Demand removal efficiencies that reached 93%.