Applied Mechanics and Materials Vol. 164

Abstract: A novel photochromic diarylethene, 1-[2-methyl-5-(4-chlorophenyl)-3-thienyl]-2-[2-methyl-5-(phenanthren-10-yl)-3-thienyl]perfluorocyclopentene was synthesized and its photochromic and fluorescent properties were also investigated. The compound exhibited remarkable photochromic, changing from colorless to blue after irradiation with UV light both in solution and in PMMA film

Abstract: A new unsymmetrical photochromic diarylethene, 1-(3-thienyl)-2-(2- n-butyl-5-hydroxymethyl-3-thienyl) perfluoroncyclopentene (1a), was synthesized and its optoelectronic properties, such as photochromism and fluorescence in solution and in PMMA film were investigated. This compound exhibited remarkable photochromism, changing from colorless to pink after irradiation with UV light in hexane solution. The new diarylethene also exhibited relatively strong fluorescence by photoirradiation in solution and in PMMA film, and the fluorescence intensity decreased along with the photochromism upon irradiation 297 nm light and its closed-ring isomer showed almost no fluorescence

Abstract: The recovery of Ni2+ from nickel containing solution is a worthwhile work, owing to its precious value. In the present work, the optimal values of electrolysis (EL) operating parameters were elaborately investigated using Taguchi approach. The effect of Ni2+ initial concentration, boric acid, pH, and voltage were investigated in terms of nickel recovery and energy consumption. The results obtained showed that the influential factors on nickel recovery were voltage > boric acid > pH > concentration. However, in terms of energy consumption the following order of concentration > boric acid > pH > voltage was obtained. A confirmation experiment was carried out with the optimized parameters (boric acid 18g/L, nickel concentration 1000 mg/L, voltage applied 4.0 V, and pH 4). The recovery of Ni2+ yielded about 88%, and the outlet Ni2+ was as low as 119 mg/L. The electrolysis dynamic mode was investagated with flow rate 20 mL/min. The results showed that the outlet nickel concentration was 350 mg/L equal to 65% of Ni2+ recovery and energy consumption of 25.7 kW h/kg. Electrolysis could effectively recover nickel, however the Ni2+ concentration of the residual electrolyte was much higher than the restriction of 1 mg/L, so we used electrodialysis to further treat the residual electrolyte and the nickel concentration has been reduced below 1 mg/L , which will be discussed in other paper.

Abstract: Si/Al/C composites were synthesized by the method of doping aluminum and glucose-modified. The samples were characterized by XRD, SEM, and the capacity and cycling stability of the composites were tested by electrochemical charge/discharge test system. After glucose was pyrolyzed, the first discharge and charge capacity of Si/Al/C composites were 1312 and 956.7mAh/g, and the first coulombic efficiency was 72.9%. After 50 cycles, the capacity of Si/Al/C composites was 440mAh /g and the coulombic efficiency remained over 98.1%

Abstract: Utilizing international standards organization published the earthworm avoid behavioral responses to evaluate the quality of the soil experimental method standardization, we test the effect of six different concentrations of cadmium on the behavior of response of the earthworms (Eisenia fetida). After 24 hour and 48 hour respectively, the number of earthworms in the different quantity of the soil was counted. And at the same time, the earthworms were used to do a try-wrong learning behavior experiment, to research the relation between the earthworms treated with different concentrations of cadmium and memory time. The results showed that the earthworms like to stay in 50 mg/kg concentration in the soil.

Abstract: SUS304 stainless steel samples were sputter-etched by a radio frequency (RF) magnetron sputtering apparatus. Correlation between the formation of conical protrusions on the steel surface and sputter power was discussed. The results show that the conical protrusion precipitates both uniformly and densely on the surface with the power being 600W, the anode-to-substrate distance being 50mm, the argon gas flow ratio being 50sccm and the sputter-etching time being 6h. The roughness of the samples sputter-etched at various sputtering powers for 6h was analyzed. According to the results, sputter-etching brings about the development of surface roughness, which in turn may affect the sputter-etching process

Abstract: An unsymmetrical diarylethene derivative was synthesized, and its photochromic properties and fluorescence switch were investigated in detail. The results showed that this compound exhibited reversible photochromism, undergoing reversible cyclization and cycloreversion reactions upon alternating irradiation with UV and visible light both in solution and in PMMA film, and its absorption maxima were observed at 574 nm in hexane and at 579 nm in PMMA amorphous film, respectively, upon irradiation with 297 nm UV light. The diarylethene 1a in hexane solution exhibited relatively strong fluorescence at 413 nm when excited at 322 nm. The fluorscence intensity is highest at the concentration of 1.0×10-4 mol/L when excited at 322 nm.

Abstract: Lanthanum-based thin films are deposited on the oxidized 3-mercaptopropyl trimethoxysilane self-assembled monolayer (MPTS-SAM) based on the chemisorption of the sulfonic group. The surface energy, chemical composition, phase transformation and surface morphology of the films are analyzed by using contact angle measurements, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The experimental results indicate that the lanthanum-based thin films are absorbed on oxidized MPTS-SAM and lanthanum element with different oxidation states exists in the thin films deposited on the surface of self-assembly monolayers. The content of lanthanum on the oxidized MPTS-SAM increases with the extension of the assembly time and the rare earth reached saturation when the time was 6h.

Abstract: Abstract: The presented study mainly focused on investigating detailed engineering properties of municipal solid waste incineration residues as road construction materials with different application classes. Also, the leachability of heavy metals and salts in the residues as a function of the ratio of liquid and solid was tested. The Chinese specifications about road construction materials were employed to evaluate the application capacity of the waste incineration residues. The obtained results indicate that bottom ash basically complies with the technical requirements for road base and sub-base materials with exception of the low compataclity and high organic content of the fine fraction. The toxicity test showed that bottom ash can satisfy the limit values of heavy metals and salts that was established by Chinese specification for hazard solid waste. For the application of the ash in road base, it should be mixed with other materials to improve the compataclity. Pretreatment of fine fraction of bottom ash to remove organic matter is necessary.

Abstract: Spinel compounds Li4Ti5O12 were synthesized via solid state reaction in an Air atmosphere and electrochemical properties were investigated by means of X-ray diffraction, cyclic voltammetry, and charge–discharge tests. The results indicated that the compound was spinel structure, and the initial capacity could reach 162.28 mAh•g-1 and the cycling performance was good, implying the spinel structure of Li4Ti5O12 was more stable when the material was tested by charging-discharging. The Li+ could reversibly intercalate and deintercalate in the anode material. The material prepared by solid-state method showed a promising commercial application in lithium-ion batteries.