Advanced Materials Research Vols. 887-888

Abstract: Co₃O₄/NiO nanocomposite films were electrochemically synthesized on a ITO surface. The Co₃O₄/NiO nanocomposite films were characterized by energy-dispersive X-ray analysis (EDS) and scanning electron microscopy (SEM). The electrochromic properties of Co₃O₄/NiO nanocomposite films are investigated in an aqueous alkaline electrolyte (0.1M KOH) by means of transmittance, cyclic voltammetry (CV) and chronoamperometry (CA) measurements. The Co₃O₄/NiO nanocomposite films exhibit a noticeable electrochromism with reversible color changes, and fast switching speed (4.1 s and 3.6 s).

Abstract: Periodic mesoporous organosilica film was prepared via sol-gel and spin-coating methods using a 1, 2-bis (triethoxysilyl) ethane (BTEE) and a poly (ethylene oxide)-poly (propylene oxide)-poly (ethylene oxide) triblock copolymer template (P123). Thermal treatment at 350°C for 1h resulted in the formation of ultralow dielectric constant (k) film with a k value of 1.82, a leakage current density of 1.58×10^-9 A/cm² at 0.5MV/cm, Youngs modulus of 6.45 GPa, and hardness of 0.58 GPa. Further, thermal treatment at higher temperature up to 500°C still achieves an ultralow k value smaller than 2.0, similar leakage current characteristics, and enhanced mechanical properties. These indicate that synthesized PMO film has robust thermal stability, and very good potential for the application of next-generation inter-level dielectrics.

Abstract: In the modern world, the theme of low carbon economic development trend advocates energy conservation and discharge reduction, and the energy-saving technology of thermal insulation film of automobile glass and construction glass has attracted increasing more attention. This paper adopts liquid phase precipitation process to prepare nanoSnO₂ polyacrylate thermal insulation organic film: first, select precursor solution concentration in favor of generating outphase precipitation and pH value to prepare SnCl₄ solution with low concentration 2 mM-10 mM, and hydrochloric acid with concentration 0.1 M-0.4 M; select methyl methacrylate 34.5%-90%, BA 10%-35.5%, MAA 0%-30% and AIBN 0.1%-0.3% to prepare polyacrylate film; put the prepared PA film in SnCl solution, control reaction temperature to be 40°C-80°C, maintain reaction time 6-18h, take out the film, wash and dry to get nanoSnO₂ organic thermal insulation film. According to XRD analysis and SEM observation, SnO₂ is uniformly deposited on the surface of organic film, having good thermal insulation performance.

Abstract: This study produced a regularly arranged membrane, called anodic aluminum oxide (referred AAO), by mean of anodic oxidation treatment. The structure of AAO can be molecular self-assembly and its pore size is consistent. Also, the manufacturing process cost is low. These properties make the AAO be a nanotemplate material. This study further created a high quality of nanostructured film by electrochemical mould with the design of electrolyzer. In addition, a uniform nanothin film was grown on the aluminum surface in the stable control of current and temperature according to the conditions of different anode treatment. This film can form a nanopore array which the diameter can be controlled the size ranging from 15 nm to 400 nm. As results, the study can produce nanoporous template for various aperture by mean of anodic oxidation.

Abstract: The development of the morphology in asymmetric Polystyrene-b-Polylactide (PS-b-PLA) thin films was investigated by Tapping-mode AFM. The thin films were prepared by solution casting with different evaporation rates. Films were cast onto hydrophobic Si wafers. When PS-b-PLA was dissolved in chloroform, fast evaporation (~110nL/s) produced hexagonally packed perpendicular PLA cylinders in the PS matrix; intermediate evaporation (~25nL/s) generated mixed microstructures of PLA cylinders of either vertical or parallel to the substrate; slow evaporation (~9nL/s) produced the PLA cylinders that were fully parallel to the substrate. This simple one step route is shown where highly oriented, ordered arrays of cylindrical domains of PS-b-PLA can be produced over large distance.

Abstract: The contamination of nitrate in mincro-polluted water is a serious problem nowadays. Drinking the nitrate-contaminated water will do harm to peoples health. In this article, the nitrate removal with biofilm-electrode process which is based on the autohydrogentrophic denitrification is elucidated, as well as factors which have effects on the performance of the reactor. The advantages of carbon anode are discussed.

Abstract: A reasonable composition of different kinds of magnetic anisotropy of bilayer film has been carried out. The criterium of magnetic uniaxiality of bilayer film contained the first-order and the second-order crystallographic anisotropy has been defined. It has been demonstrated that the effective constants of the first-order and the second-order magnetic anisotropy of bilayer film has a non-linear dependence on the corresponding constants of crystallographic anisotropy of the layers, angles between them and constants of interlayer exchange interaction.

Abstract: The TiO2 thin films were prepared by vacuum evaporation on glass using TiO2 powder 99.99% as coating material and with varying deposition speed. The TiO2 thin films were characterized by a-step device, X-ray diffraction (XRD), atomic force microscope (AFM). The influence of deposition rate were discussed. The results indicated that thickness of the TiO2 thin film was prepared under the deposition rate of 4Å/sec was 200 nm at room temperature, with amorphous structure. The film changed to anatase crystal structure when was annealed at 450 °C for one hour and the TiO2 thin film was uniform and well combined with the glass substrate.

Abstract: Bagasse ash (BA) is a plentiful byproduct obtained from the process of electricity generation during sugar manufacturing. We investigated the influence of adding calcium carbonate powder (CCP) to self-compacting mortar (SCM) mixtures. Type 1 Portland cement was replaced with 0%, 20%, and 40% as-received or ground BA and CCP by weight. Mixtures were designed to yield a slump flow spread of 25.0 cm in diameter. The water requirement and V-funnel flow time of each SCM mixture were determined.

Abstract: For the problems such as layering and splitting of traditional sandwich structure composite, a resin matrix composite with lattice and interface reinforced structure has been designed, and using vacuum forming process was developed in this paper. The composite material has high specific strength and stiffness. On this basis, a road pavement developed by this composite material used in engineer urgent was designed. This composite pavement with characters of light weight, high strength and good toughness, and its surface plate was hard, wear-resistant and non-slip. The connection between the pavements was designed for quick assembling, which could make the pavement assemble operation was simple, fast and reliable.