Advanced Materials Research Vols. 287-290

Abstract: A new fluorescent Carbon Quantum Dots-Ionic Liquid (CQDIL) hybrid was synthesized by simple method. This CQDIL exhibited extraordinary stability and enhanced photoluminescence .

Abstract: The title compound Fe₂Mo₃O₁₂ is prepared using a wet chemical method from aqueous solutions of ferrous nitrate and ammonium molybdate. The various process parameters were optimized to get a suitable precursor, which upon calcination at 700°C for 2 h gave a well crystalline product. The product was characterized by powder XRD to have a monoclinic unit cell of Fe₂Mo₃O₁₂. Its thermal expansion property was investigated by thermomechanical analyzer and high-temperature XRD. The typical monoclinic to orthorhombic phase transition happened at about 500°C, and Fe₂Mo₃O₁₂ shows great NTE (macro -13.43×10^-6°C^-1 and micro -21.77×10^-6°C^-1) property during the temperature range from 500°C to 800°C.

Abstract: A EBG（Electromagnetic Bandgap） structure was prepared based on the theory of the high impedance surface photonic crystal and the HFSS emulating results. The measurement result showed that the bandgap of the EBG structure was in the Ultra Wideband range. The designed structure was fabricated by a method of low temperature co-fired ceramics technology（LTCC） using ceramics as the matrix and silver as the coils. The micro-structure was analyzed by microscope and scanning electron microscope which showed that these two kinds of materials were well connected. A bandgap between 4GHz~5.5GHz was found by the Vector Network Analyzer which was accord to the emulation.

Abstract: Blast furnace dust was used to synthesize ferrite, which could not only increase the economic value of mineral resources, but also reduce the production cost. High infrared radiation ceramic was prepared using cordierite and ferrite FeMnCuO₄ by high temperature solid state sintering method. The phase composition and the microstructure of the sample were investigated using XRD analysis and SEM. The infrared emissivity of the infrared radiation ceramic was 0.88. Ferrite and cordierite form replacement type sosoloid at high temperature, which can greatly improve the infrared radiation property of ceramic.

Abstract: RPSL-01 type photosensitive resin for Stereolithography was prepared with 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexanecarboxylate (UVR 6110), bisphenol A type epoxy diacrylate (EA-612), tripropylene glycol diacrylate (TPGDA), pentaerythritol triacrylate(PETA), triethylene glycol divinyl ether (DVE-3), benzil dimethyl ketal (Irgacure651) and a mixture of triarylsulfonium hexafluoroantimonate salts (UVI-6976) as raw materials. Some properties of the photosensitive resin were investigated. The viscosity of the photosensitive resin at 30°C was 425mP_a.S, The glass transition temperature (Tg ) of the UV-cured specimen was 47°C, and the weight loss of the UV-cured specimen at 200°C was less than 5%. The photosensitive resin and its UV-cured specimen were also characterized by infrared (IR).

Abstract: The adsorption of C. I. Reactive Red 2 from aqueous solution on Zn-Al calcined layered double hydroxide (CLDH) was investigated. Experiments were carried out as a function of Zn-Al molar ratio, contact time, pH, temperature and initial dye concentration. The results showed that Zn-Al calcined layered double hydroxide had higher capacity of removal of the dye. Zn-Al CLDH with Zn-Al molar ratio of 3 and with pH range of 4.0-8.0 was found to be optimal for dye removal. Adsorption capacity of dye decreased with increasing temperature and increased with increasing initial dye concentration. It was found that the adsorption equilibrium data followed the Langmuir adsorption model. The maximum adsorption capacity obtained from the Langmuir equation at temperature of 30°C was 116.28mg/g (R²=0.9992) for the dye.

Abstract: The morphology of PVA/Na-MMT composite under different freezing technology conditions was studied. Inlfuence of PVA content and frozen conditions on microstructure and formation mechanism of PVA/Na-MMT composite materials were analyzed using scanning electron microscopy(SEM). The experiment results show that the structure of freeze-dried PVA/Na-MMT composite is influenced by both frozen technology and PVA dosage. PVA/Na-MMT composite frozen in Low-temperature refrigerator presented honeycomb-like structure when PVA dosage was 1%, and when the dosage of PVA was 2%, 3%, 4% respectively, the composite exposed wrinkle superposition structure. In liquid nitrogen frozen, Fiber-like structure of PVA/Na-MMT composite was obtained when the PVA content more than 3%.

Abstract: The paper researched stress and strain of aluminum foam, polyurethane and aluminum foam-polyurethane composite via Ansys software, researched energy absorption capacity of the three material via energy absorption curve method, and researched energy absorption capacity of the aluminum foam-polyurethane composite under different shock and different thickness. The research results are obvious: under the same material parameter and 7800gn shock conditions the energy absorption of the aluminum foam-polyurethane composite is better than the monomer of the aluminum foam and the polyurethane. Under the same shock conditions, the thicker the composite is, the more energy it absorbs. Aluminum foam-polyurethane composite can plays cushioning and energy absorption roles when the acceleration speed reaches 7800gn

Abstract: Ramie (Boehmeria nivea) is a kind of natural fiber that has good mechanical and environmental friendly properties. The fabric woven by ramie yarns shows excellent dimensional stability. Polypropylene (PP) was used as matrix for its recyclable and thermoplastic properties. PP is the widely used thermoplastics for composite and currently it is very common in building, construction, furniture and automotive products. Since the eco-power automobile body was designed for light-weight and low fuel consumption, there seems to be high potential application to automobile industry for ramie-PP composite. Therefore, in this paper, we developed a constitution of fabric to form stable structure reinforcement. The reinforcement and PP particles were treated in vulcanizer by thermo-compression technology. The fundamental mechanical properties of the composite were tested for finite element analysis (FEA). An eco-power automobile body was designed in Pro/E^® Wildfire 5.0 and transferred to Finite Element Analysis Software for material and structural simulation analysis. Structural improvement and sizing optimization of the eco-power automobile body model were simulated to judge the material application and its structure effectiveness.

Abstract: A series of tests was carried out on the hydrophilic surface that was made of a new hydrophilic anti-frosting paint with the character of restraining frost growth. Compared the result with prevenient hydrophilic paint, the new paint presented in this paper has better effect on retarding frost formation under low and high relative humidity environment and the thickness of the coat made by the new paint was only 0.06mm, that was only 20 percentage of film thickness of prevenient paint.