Advanced Materials Research Vols. 791-793

Abstract: TiO₂ nanotube arrays (TNTs) were preparation on Ti influoride containing electrolytes via anodization. Poly (diallyldimethylammonium chloride (PDDA) alternately was assembled with poly (acrylic acid) (PAA) to modified TiO₂ nanotube. the modified TiO₂ nanotube loaded with alendronate, and its release properties were investigated. The samples were characterized by scanning electronic microscope (SEM), Fourier transform infrared (FT-IR). The results show that the loading rate and loading amount of alendronate were greatly influenced by electrostatic interaction. It suggested that the PDDA/PAA multilayer films had a potential application in modifying TNTs for drug delivery.

Abstract: The solubility of benzothiazolium methylsulfate ([HBt [CH₃SO₃]) in binary solvent mixtures of ethyl benzoate and alcohol was measured by equilibrium method. It was found that the solubility of [HBt [CH₃SO₃] in this mixture increased with alcohol in mixture scaling up at the same temperature. When the composition of mixture was the same, the increase rate of solubility of [HBt [CH₃SO₃] in binary solvents was very different at various temperature range. All the solubility data were correlated with three thermodynamics models, and the average relative deviation (ARD) of the calculated value of the three models and the measured values was all less than 2.94%. The thermodynamics models revealed that the degree of association of [HBt [CH₃SO₃] decreased with the alcohol ratio reducing in binary solvents, the fusion enthalpy of HBt [CH₃SO₃] remained the same at the range from 233.1K to 293.1K. At last, it was summarized that the change rule of content of related components of [HBt [CH₃SO₃] + ester + alcohol ternary system at different conditions, and some properties of the system were forecasted. The research in this text was hoped to provide meaningful reference for the use and recycling of ionic liquid.

Abstract: The UV curing kinetics of coating containing siloxane modified polyurethane-acrylate were studied using photo-DSC (DPC). The effects of some factors such as incident light intensity, initiator concentration, reaction temperature on the curing kinetics have been analysized from DPC data. The curing kinetic parameters (k_p and k_t) for prepolymers have also been determinedv by combining steady state and non-steady state kinetics.

Abstract: For self-polishing coating with cuprous oxide serving as the main antifouling agent, the release rate of copper ions is one of the most important factors to evaluate its antifouling effect and validity period. In this work, experimental research was carried out involving the release rate as well as the panels in shallow submergence of antifouling paints with nanoadditives. The results indicated that the prepared coating with a slow and steady release rate in range of 20 to 25μg/(d·cm²) had a long-term and efficient antifouling performance. Synergistic effect of the photocatalysis activity of nanotitanium dioxide and the sterilization ability of cuprous oxide contributed to the antifouling effect in view of the evaluation of the antifouling panels in shallow submergence.

Abstract: Molecular dynamics simulation method is used to study the effect of NH₄Cl on the properties of Lewis acidic 1-ethyl-3-methyl-imidazolium chloride/chloroaluminate molten salts (molar ratio1:2) at the 300K. The dynamics and physical chemical properties such as diffusion coefficients, viscosity, conductivity of Lewis acidic [EmiCl/AlCl₃(molar ratio1:2) with different molar fraction of NH₄Cl are calculated. It is shown that the density increases firstly and reduces afterward, the conductivity decreases and viscosity increases with increasing of NH₄Cl content. The self-diffusion coefficient of [Emi⁺, NH₄⁺, Cl^- and AlCl₃ reduces, and the trend to AlCl₃ self-diffusion is the most obvious.

Abstract: The coating binder in cross-section of coating layer will be migrated, the binder concentration will be different in z-direction of coating layer, which affect some properties of coated paper. The paper studied the effects of coating progress on binder migration and affected factors. The z-direction distribution of the coating binder which was tagged with Br in coating layer and its concentration in coating surface were examined quantitatively by using SEM-EDXA and ESCA analysis. During coating process the drying rate, dwell time from coating device to dryer and coating weight affect the binder migration. The mechanism of binder migration was proposed. The results indicated that the degree of binder migration is directly proportional to the drying temperature and coating weight, but reduces with extending the dwell time.

Abstract: The Paper studied the effects of pigments and base paper on binder migration and affected factors. The z-direction distribution of the coating binder which was tagged with Br in coating layer and its concentration in coating surface were examined quantitatively by using SEM-EDXA and ESCA analysis. The results showed that the increase of the ratio of calcium carbonate in the pigment content, coating surface binder concentration increased, and coating surface binder concentration increased with the increase of particle size of pigments. The result also indicated to small base paper absorbency, coating surface has high binder migration level, the coating layer bottom (base paper direction) has low binder concentration. To high absorbency base paper, the opposite is true.

Abstract: In order to optimize the ultrasound-assisted corn oil biodiesel transesterification process conditions, factors four through five levels of orthogonal test to optimize their processes, the findings indicate that ultrasound-assisted transesterification of corn oil biodiesel optimum conditions : 1:11 molar ratio of methanol to oil, corn oil catalyst was 11%, the reaction temperature is 90 °C, reaction time was 50min, ultrasonic power 360W, under these conditions, the measured ratio of the average of the transesterification 91.85 %. Relative to conventional preparation methods, the method is simple, rapid, saving solvent consumption and other advantages.

Abstract: The process of BaS reacting with Na₂SO₄ from waste water to generate BaSO₄ is an ideal waste water treatment process, in spite of the shortage to generate lots of by-products, the dilute solution of Na₂S. A way of using dilute Na₂S solution to absorb SO₂ is introduced in this paper. Some problems concerning this process were discussed.

Abstract: Resting cells of Pseudomonas sp. SY031 were used for the direct transformation of adiponitrile to 5-cyanovaleramide (5-CVAM), which is an important intermediate of azafenidin, a new kind of herbicide with high efficiency, low toxicity and non-pollution. In this study, reaction conditions for this nitrile hydratase mediated conversion were optimized. It was observed that the maximum conversion of adiponitrile to 5-CVAM was in a solution containing 50 mM phosphate buffer (pH 6.4), 10 mM adiponitrile at 35 °C. 10 mM adiponitrile was completely converted into 5-CVAM and adipamide in shaking flasks with 5-CVAM as the main product (9.004 mM) and adipamide as a low yield (0.896 mM), indicating high regio-selectivity of the nitrile hydratase in Pseudomonas sp. SY031.