Advanced Materials Research Vols. 152-153

Abstract: In this paper a novel method for estimating state of charge (SOC) of lithium ion battery packs in battery electric vehicle (BEV), based on state of health (SOH) determination is presented. SOH provides information on aging of battery packs and it declines with repeated charging and discharging cycles of battery packs, so SOC estimation depends considerably on the value of SOH. Previously used SOC estimation methods are not satisfactory as they haven’t given enough attention to the decline of SOH. Therefore a novel SOC estimation method based on SOH determination is introduced in this paper; trying to compensate the deficiency for lack of attention to SOH. Real time road data are used to compare the performance of the conventionally often used Ah counting method which doesn’t give any consideration to SOH with the performance of the proposed SOC estimation method, and better results are obtained by the proposed method in comparison with the conventional method.

Abstract: A new type of in-situ composite nano-multilayer plate with ultra-high strength (b 2112 MPa), Q235 steel plate with nano-layered structure of lath martensite produced by severe cold-rolling, was developed. After cold-rolling, subsequent annealing has great effect on the deformed lath morphology and grain refinement. Microstructure recrystallizing course have taken place after long time annealing at 350 °C. The recrystallization activation energy is 151 kJmol-1. Microstructure characteristics along rolling direction arrangement was decreased after annealing at 400 °C. In addition to the ultrafine ferrite grains, nano-carbides precipitated uniformly in the specimen annealed at 500 °C. Annealing at and above 600 °C resulted in coarse ferrite grains with spheroidized coarse carbides, causing grain growth. The average crystal size is about 4.7 m after annealing for 60 min at 600 °C.

Abstract: P-N junction photocatalyst NiO/TiO2 photoexcited by visible light was prepared by sol-gel method using Ni(NO3)2•6H2O and tetrabutyl titanate [Ti(OC4H9)4] as the raw materials. The p-n junction photocatalyst NiO/TiO2 was characterized by UV-Vis diffuse reflection spectrum, fluorescence spectra (FL), X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). UV-Vis spectrum showed that the absorption wavelength range of NiO/TiO2 is extended to the visible region, making it an effective photocatalyst photoexcited by visible light. This was demonstrated by photocatalytic reduction of Cr2O72- and photocatalytic oxidation of methyl orange (MO) under visible-light (λ>400 nm) irradiation. Doped-NiO effectively suppressed the phase transformation of anatase to rutile and the growth of titania crystallites. The optimum percentage of doped NiO is 0.5% (mole ratio of Ni/Ti). Effects of heat treatment on the photocatalytic activity of p-n junction photocatalyst NiO/TiO2 were investigated. The mechanisms of influence on the photocatalytic activity were also discussed by the p-n junction principle.

Abstract: The effects of a novel nano-ZnO coated PVC film on physicochemical quality and microbiological changes of fresh-cut ‘Fuji’ apple were evaluated. Fruit decay were efficiently reduced in nano-packing samples. The content of ascorbic acid and total phenolic dropped to 0.2 g•kg-1, 1.2 g•kg-1 in nano-packing samples and 0.02 g•kg-1, 0.6 g•kg-1 in control on day 12. In addition, the nano-ZnO coated PVC film not only inhibited the growth of total aerobic psychrophilic microorganisms, the count of which did not exceed 5 log cfu g−1 FW, but also suppressed the increasing of yeast and mould, the maximum growth of which reached only 3.6 log cfu g−1 in the nano-packing but 6 log cfu g−1 in control.

Abstract: In this paper the spline subdomain approach is applied to the 2D simulations of the temperature distributions for composites containing a single rectangular particle with an interfacial thermal resistance at the interface between the particle and matrix. The bicubic B-splines are used to construct the trial functions for the approximations of the potential fields of composites. Applying the weighted residual point collocation method inside each subdomain and also on the boundaries between different subdomains, a system of linear algebraic equations is set up to determine the unknowns of the trial functions. The temperature distributions both inside the rectangular particle and along the interfaces under different interfacial contact conditions can be simulated approximately. Numerical results which are compared with the available solutions obtained by FEM method illustrate the accuracy and suitability of the present approach for steady-state conduction. Even in the adjacent areas of corners in the rectangular particle, the simulation results are also satisfactory.

Abstract: Experiment studies are carried out on the stitching reinforcement of composite laminates containing a circular hole. The tensile strength and stiffness are measured, and their dependence on stitching parameters such as stitching needle distance, row spacing, edge distance and stitching type (i.e. single stitching or double stitching) are analyzed. The strain distribution is investigated experimentally for different stitching parameters, external load and edge location of the hole. It is shown that the results of stitching reinforcement are quite different for composite laminates with a circular hole, which could provide proper stitching parameters for designers. The analysis for different failure samples are made. Reinforced by stitching, the failure section is mainly perpendicular to loading direction. It can be seen that the capacity of load bearing rises when the composite components are reinforced by stitching the hole.

Abstract: The printing and packaging properties of ordinary Polypropylene (PP) materials were modified by self-made nanometer silicon dioxide (SiO2) and the effects of different SiO2 proportion were investigated. The results showed that SiO2 modification not only greatly increased the mechanic properties of PP but also improved its universal performance including polarity, ink adhesion and solvents residual and therefore enable PP materials better meet the requirement for food packaging industry.

Abstract: New series polymer-bounded manganese complexes were synthesized and their potential structure was investigated. Their application in the oxidation of cumene, by atmospheric pressure of molecular oxygen in the absence of solvent catalyzed by polystyrene-bound-Mn-L (where L=2,2’-bipyridine and 1,10-phenanthroline) complexes without the use of any special oxidant or coreductant, were studied. The oxidation products 2-phenyl-2-propanol and 2-phenylpropylaldehyde were produced in 41% to 71% yield and the selectivity to total alcohol and aldehyde was 100%.

Abstract: The insecticidal effects of the insecticide based on the mixture of porous starch and fennel essential oil was investigated. Its insecticidal activity and its mortality on adults of Tribolium confusum were evaluated. Moreover, the production methods used in the evaluation was studied. Fennel essential oil was put into the porous starch with glycerin and ethyl acrylate. Non-woven was chosen as the substrate, and ethyl acrylate as adhesives. Then the new insecticide was made. According to the fumigant toxicity and persistent of the new insecticide, the insecticidal effect of the insecticide was analyzed. Tribolium confusum mortality was dose dependant and after 4-day exposure the insecticide was more toxic than the pure fennel essential oil. There was, however, a highly significant loss of toxicity after 24 and 48 h following treated with essential oil and insecticide, respectively. The fennel essential oil evoked moderated repellent action and high fumigant toxicity (LD50 = 0.030μL/cm3) against adults of Tribolium confusum.

Abstract: Effect of PE materials on environmental temperature, frost accumulation and electricity consumption of mini store-room prepared with the new type foamed polyethylene was investigated. The application of portable mini cold storage room made of this material on the quality of “Fuji” apples was also studied. The fruits of apples had good quality after 150 days storage. Our findings reveal that soft foamed PE insulation material has a good potential to prepare mini store-room for the preservation of fruits.