Frontiers of Materials, Chemical and Metallurgical Technologies

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Authors: Ying Guan, Hong Jiang Cui
Abstract: Air gap membrane distillation (AGMD) experiments were done to reseach flux of membrane distillation at different working fluid temperature and mass flow rate. The driving power of distillation experiments is solar power. The experimental flux of membrane distillation reached 49kg/m2•h. The mathematical model of AGMD’ heat and mass transfer was set up. The biggest relative error is less than 9% between results of experiment and mathematical model calculation. The mathematical model can be used to forecast the distillation flux and the thermal efficiency.
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Authors: Gui Qiong Wei, Rong Zheng, Xiao Hong Yang
Abstract: Objective: To analyse chemical constituents of the volatiles of Ficus hookeriana Corner. Method: The volatiles of bungei were extracted through steam distillation, and then the constituents were separated by GC and identified by MS. Result and Conclusion: 53 Compounds were identified. The principal chemical constituents of the volatiles of Ficus hookeriana Corner are Acetal (6.323%)、Benzyl Alcohol(11.781%)、Benzoic acid, methyl ester(1.749%)、Linalol(4.920%)、Phenylethyl Alcohol(3.101%)、Acetic acid phenylmethyl ester(1.415%)、Elemicin(5.099%)、Morillol(2.441%)、 Griseoxanthone C(1.212%)、Prednisolone(3.302%)、Fenolipuna(2.672%)、Norpluviine(1.494%)、Crotonosine(28.115%)、Griseoxanthone C*(2.085%)、α-Endosulfan(1.055%)、1,4-diamino-2-methoxy-9,10-Anthracenedione(3.349%)and so on.
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Authors: Jiang Zhu, Xiu Li Wang
Abstract: A new cellulose graft copolymer was synthesized by the lipase-catalyzed ring-opening polymerization of ρ-dioxanone (PDO) onto cellulose in 1-N-butyl-3-methylimidazolium chloride ([Bmim]Cl). The structure of the copolymer was characterized by FT-IR and 1H-NMR. The obtained copolymers exhibited the different thermal stability by TGA after the graft copolymerization. The reaction media applied can be easily recycled and reused.
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Authors: Shi Qiang Chen, Dun Zhang, Jia Jia Wu
Abstract: Different from the corrosion under anaerobic conditions, oxygen (O2) takes part in the cathodic reaction under aerobic conditions. Sulfate-reducing bacteria (SRB) have been regarded for many years as strictly anaerobic bacteria, but recently, they are found to be able to survive in the presence of O2, and how they affect the oxygen reduction reaction (ORR) has not been clear. In this study, the role of sulfide, a key inorganic metabolite of SRB, in ORR has been investigated on Q235 carbon steel electrode with cyclic voltammetry and electrochemical impedance spectroscopy. Three cathodic processes are recorded on cyclic voltammograms in O2-saturated 3.5% NaCl solution: ORR, iron oxides reduction and hydrogen evolution. The peak current of ORR decreases with the introduction of sulfide, and finally vanishes when the sulfide concentration is more than 0.5 mM. EIS reveals that sulfide leads to the disappearance of the feature of semi-infinite diffusion of ORR and the fitting results demonstrate that charge transfer resistance increases with increasing sulfide concentration. Therefore sulfide hinders the cathodic reduction of O2 on Q235 carbon steel in 3.5% NaCl solution.
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Authors: Sumuntana Anuchatkidjaroen, Thawatchai Phaechamud
Abstract: In the tropical countries, virgin coconut oil (VCO) has been abundantly utilized as traditional medicine and cosmetic, but its major problem is temperature sensitive. This oil changes into some wax-like at cool environment. The purpose of this study is to decrease wax deposition of this oil by investigate the effect of surfactants on the physical properties and drug release characteristic. Ibuprofen (IB), which can soluble in VCO, was used as a model drug. Viscosity, pour point, cloud point and polarized light microscope examinations were conducted to characterize the change of VCO physical properties. In vitro drug release experiment was performed using dialysis method at 50 rpm and 37°C in phosphate buffer pH 7.4. The addition of surfactants in VCO increased the efficiency for measuring the viscosity at lower temperature. Result from viscosity measurement indicated that Solutol® HS15 (ST) was the most suitable for choosing as representative of the surfactants. Both pour point and cloud point could not reduce by ST because the crystals size of VCO with and without ST was not different. There was no difference of viscosity of each formula during the release experiments (37°C), therefore the release rate of drug from VCO containing or without ST was not different. These indicated that the surfactants and ibuprofen affected the physical properties but did not affect the release of this investigated VCO.
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Authors: Hua Qing Xue, Hong Yan Wang, Gang Yan, Wei Guo, Xiao Bo Li, Hong Chao Wang
Abstract: The kinetics of the thermal decomposition of Huadian oil shale was studied at five different isothermal atmospheres of 623K, 648K, 673K, 698K, and 723K. The temperature recorded was that of the sample that the temperature error between furnace and sample will eliminate. According to conversion data, the effect of increased temperature is to decrease the pyrolysis time. The conversion data described the oil shale pyrolysis as two stages, rapid conversion and modest conversion. The Arrhenius equations of ki=1.40×105e-109828/RT and kii=1.76×106e-130463/RT were obtain by isothermal kinetics model for each stage.
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Authors: Lin Zhuan Ma, Jun Ming Guo, Ying Jie Zhang, Qiong Fang Cui, Man Hong Liu, Hong Bin Wang, Wei Bai
Abstract: Mercury is a material with serious toxicity, and superfluous mercury can pollute large areas. The paper studied the reaction time, pH of the leaching solution, the concentration of mercury of the leaching solution’s effect for mercury’s absorption characterstic and three synergistic effect. The paper obtained some basic data about soil’s mercury pollution.
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Authors: Cheng Guo Liu, Yong Hong Zhou, Li Hong Hu
Abstract: Two kinds of novel biobased materials were obtained by copolymerization of tung oil -based monomer (TOPERMA) or tung oil-modified unsaturated polyester (UPE-TO) with styrene. Mechanical and thermal properties of the two TO-based biopolymers were presented and compared. It was shown that the UPE-TO polymer matrix showed better toughness than the pure unsaturated polyester (UPE) matrix, while the TOPERMA polymer matrix had better thermal stability than the UPE-TO and the pure UPE matrixes by thermogravimetric analysis (TGA). These tung oil-based polymers show promise as an alternative to replace petroleum-based materials.
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Authors: Yan Hui Zhao, Jia Xi Zhang
Abstract: This paper analyzes a series of physicochemical properties of biodiesel blends, then explores the effect of biodiesel content on physicochemical properties of the blended fuel and the application prospects of biodiesel.
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Authors: Yan Jun Tan, Chang Nan Liu, Xiu Na Chen
Abstract: To solve the problem of pigment printing’s hard handle and poor fastness, we have synthesized an amino silicone oil / acrylic emulsion blending adhesive to improve the printing handle and fastness in the paper. We studied the synthetic monomers and influencing factors to explore the best synthesis process of the acrylic emulsion polymerization. The synthetic acrylic emulsion and amino silicone were blended to explore the best printing process. We find that the printed fabrics have a good handle and significantly better rubbing fastness.
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