Mechanical and Electronics Engineering VI

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Authors: Tsair Wang Chung, Di Na Wahyu, Shih Hong Hsu
Abstract: Bio-based butanol has superior properties when compared to ethanol to be the gasohol and is gradually considered to be an important biofuel from the biomass fermentation of ABE solution. The potential sorbents for acetone (A), 1-butanol (B), and ethanol (E) recovery process will be analyzed by the isotherm data and the sorbents, such as potato starch sorbent and ZSM-5 will be selected. The above sorbents to adsorb acetone, 1-butanol, and ethanol for single-component adsorption using adsorption equilibrium apparatus will be conducted and the isotherm data will be obtained.
Authors: Xue Hua Wu, Jia Luo, Hua Wang, Zhen Fang
Abstract: Hydrothermal carbonization of bamboo was conducted at 300-370 °C for 1 h. Products in solid, oil, aqueous and gaseous phases were collected and studied. More than 20% carbon was water-soluble. Oil phase was mainly hydroxylated derivatives of benzene. Hydrochars were composed of many microspheres in morphology, with carbon content of 72.1-81.0%. Around 50-60% of carbon in bamboo remained in hydrochars. High heating value of hydrochars was 1.3-1.6 folds of original bamboo. The hydrochars had higher antioxidative stability than pyrolysis biochar.
Authors: Xiu Lan Cai, Da Tian Fu, Ai Lan Qu
Abstract: A series of microcapsules were prepared by interfacial polymerization method using epoxy and urea formaldehyde resin as core material and shell material, individually. The effects of processing conditions on the properties of epoxy microcapsules were systematically investigated based on w(Core), average diameter and decomposition temperature of microcapsules through the method of orthographic factorial design and the most optimum processing conditions were included. The results indicated that core/shell mass ratio was the most important factor on w(Core), average diameter and decomposition temperature of microcapsules. The optimum processing conditions were concluded: 1:1 for the core/shell mass ratio, 300 rpm for agitation rate and 0.8% DBS as emulsifier. The microcapsules prepare in the optimum processing conditions were well encapsuled and presented thin shell and smooth surface. Moreover, the addition of 10% microcapsules can improve the mechanical properties of epoxy matrix greatly.
Authors: Hao Jiang Zhao, Rong Qiang Liu, Hong Wei Guo
Abstract: The improved plane wave expansion method is used to investigate the effects of material parameters on the longitudinal vibration band gaps in thin phononic crystal plates. Both square lattice and graphite lattice are considered. Results show that the parameters playing the essential roles are the mass density ratio and the Young modulus ratio of the scatterers and the host materials.
Authors: Hui Xue Bao, Qiang Liu, Xiao Qin Zhou
Abstract: Sapphire (Al2O3 crystal) is a hard and inert material with good mechanical, optical, physical and chemical properties that plays important roles in optics and electronics. The surface quality is the key element of sapphire components especially in optical field. This paper mainly introduces four methods of ultra-precision polishing, researches based on polishing theories and slurry. It can be a conclusion that traditional polishing methods can improve material removal rate assisted by ultrasonic.
Authors: Dan Lu Liu, Ren Gui Xiao, Teng Zou, Jian Zhong Wang, Jian Xin Cao, Dao Yun Xu
Abstract: High-purity aluminum foil was etched with DC pulse current in acids solutions at first time. Experiments indicated that tunnels morphology was influenced by current density, pulse duty-cycle and frequency of DC pulse current, tunnels began to grow when the current density reached to 0.8A cm-2, and tunnels grew along three directions to form a netlike construction in the surface of aluminum foil, which increased effectually surface areas of aluminum foil. In addition, when aluminum was etched in the solution of 1 N HCl +0.8 N HNO3,tunnels morphology shows that tunnel does not grow continually during DC pulse current etching, so it is a method to study the mechanism of tunnel growth, for example period of tunnel growth, velocity of tunnel growth. The experimental results are discussed according to tunnels morphology.
Authors: Jian Zheng Qiao
Abstract: In order to find the more suitable drying schedule, this test, by adopting 100°Cdrying test method, studies the index of drying characteristics of Masson pine deresination wood, examines and evaluates the drying quality grade indexes. Based on the results, a drying schedule reference was drawn up.
Authors: Jian Xun Fu, Tao Li, Eng Yu Zhu, Chang Jin Wu
Abstract: During the state when China’s economy is highly developed and the investing for engineering construction is growing year by year, high strength steel bar has become the most wildly used constructional materials for architecture. 500MPa hot-rolled ribbed steel bar satisfied the requirements for quake-proof and wide-span construction materials for it’s high strength, good ductility and good weldability, 500MPa hot-rolled ribbed steel bar can be produced through different methods, such as micro-alloying, TMCP (thermo mechanical control process), post-rolling residual heat heattreatment. Microalloying process increased the strength and toughness, but the weldability decreased. TMCP and post-rolling residual heat heat-treatment can save the cost of micro-alloying elements, while the demand of equipment is much higher.
Authors: Xiao Yan Li, Yang Chen, Sha Liu, Zhi Min Zhou
Abstract: Flocculation process is a method of ballast water treatment process which can satisfy the security, effective, environmental protection, operation and economic request , on the treatment of ballast water has been studied widely at home and abroad .The paper summarizes the flocculation process application treatment about ballast water of ship, introduced the affecting flocculation process factors , and discussed the application prospect of flocculation technology in ballast water treatment application field .

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