Abstract: We investigated the bacteriostasis of the super-hydrophobic surface on aluminum alloy by PP coating. The morphology of the surface was observed by a scanning electron microscopy. The contact angle (CA) was measured by an optical contact angle meter .Staphylococcus aureus and pathogenic escherichia coli adhesion on superhydrophobic surfaces were also evaluated. The inhibition ring test results show the inhibition of Escherichia coli and Staphylococcus aureus were 79.3% and 81.1%, respectively after 24 hours’ contact at 37oC, while the Quinn test demonstrates the surface possesses high resistance to bacterial contamination. The superhydrophobic surface is a factor to reduce device-associated infection and can be used in metal practice.
Abstract: A superhydrophobic coating was prepared on the surface of aluminum alloy. The adherence and the hydrophobicity were observed by adherometer and optical contact angle meter, respectively. The affection of silane coupling agent KH550 was also investigated by the analysis of FTIR. The result indicated that the coating owns satisfactory adherence and the hydrophobicity. The treatment of KH550 increases the polar of the surface, which is responsible for the superior adherence. A similar micro-nano structure is mainly attributed to the hydrophobicity. When the density of PP-g-MAH is 1.7 % (mass ratio), the coating shows an optimum super-hydrophobicity and its water contact angles are at range of 163.0-163.9°.
Abstract: Well-dispersed nanocrystalline TiO2 powders with the average size of about 4 nm have been synthesized by a simple and rapid microwave irradiation method. The as-obtained TiO2 nanoparticles displayed obvious quantum size effects characterized by Raman spectroscopy.
Abstract: for the problem of the heterotopy particle during the Fe catalyst material manufacturing，the influence fact of hemorphology and size distribution of the catalyst is analyzed by cold numerical simulation and pilot test. It includes that the morphology of catalyst particle, the catalyst-synthesis recipe, solvent system of magnesium chloride (MgCl2), the rate of temperature rising, the ester/Ti and lavation treatments for the catalyst
Abstract: XRD，XRF，BET，Mossbauer spectrum, TEM and 27AI 29SiMAS NMR is used to characterize the samples in material engineering. Samples of heterocrystalline synthesis show almost the same activity as those prepared by solid-state ion exchange. Both are superior to the samples by traditional methods. In NH3-SCR，Al-ZSM-5 exhibits a similar activity of deNOx to Cu-ZSM-5，while with C3H8 as reducing agent Cu-ZSM-5 is much better than Al-ZSM-5
Abstract: One or a series of continuous stirred tank reactors (CSTR) is adopted in material engineering. The first esterification reactor and the final stage polyeondensation reactor are very significant，which operation affect the quality of output directly. The influence of operational variables is discussed separately. Toward the final stage Polycondensation reactor，it is regarded as ten CSTR s and obtain approximatively the figure of each component along with shaft. In the“chain-analyzing method”， Polymer is regarded as many chains. It is not the Polymer but the chain that is regarded as the component of the system. so the model treats the calculation of the reaction rates，the mass balance and the heat balance in the Polymer reaction as easily as in the reaction of low-molecular-weight substances
Abstract: Cu(In,Ga)Se2 is a very important type of absorber layer material for high efficiency solar cells in material engineering. Cu(In,Ga)Se2 thin films were prepared on polyimide (PI) substrates coated with Mo by RF magnetron sputtering in one-stage at temperature below 450 °C. Samples with high level crystallization were deposited on polyimide coated with Mo by optimizing process parameters. Lower electric resistivity, better quality of CIGS absorber layer was fabricated in lower temperature by sputtering.
Abstract: A simple, cheap and environmental double thin super-hydrophobic composite film was prepared on the surface of tinplate by a simple casting method. The contact angle and sliding angle were measured by an optical contact angle meter. And the major factors that influenced the super-hydrophobic effect of the composite film were studied in our work. The results showed that when the melting temperature was 120°C, the weight radio of PP and PP-g-MAH was 1:4, the drying time was 24h, the dosage of ethanol was 0.4ml, the composite film showed a satisfactory super-hydrophobicity and its water contact angles reached a maximum value of 156.6° while the sliding angle reached a minimum value of 2°. Because of anti-oxidation, moisture-proof and anticorrosion performance of super-hydrophobic tinplate, it has potential practical applications in packaging material engineering.
Abstract: The γ-LiAlO2: Fe3+ ceramics were successfully fabricated by using multi-mode cavity microwave furnace, which can be used as an optical functional material. The sample’s photo luminescence spectrum was measured at room temperature. There are six bands in the range of 12000-25000 cm-1. Using the crystal-field theory and introducing the average covalent factor model, we calculated the energy splittings of Fe3+ ions in γ-LiAlO2. These bands were firstly explained and assigned and calculation results are in good agreement with the optical experiment data. All results can be used for the production of optical devices.
Abstract: Degradation of simulated methyl orange (MO) was studied by combined adsorption treatment and advanced oxidation processes with nano-iron hydroxides/oxides modified slag. The adsorption treatment of nano-iron hydroxides/oxides/slag shows that with the increased of adsorbent from 0.1% to 0.5%, the removal of MO can change from 23.2% to 92.8%. While combination of the adsorption treatment and the advanced oxidation processes exhibits the enhanced disposal ability, in which the removal rate of MO changed from 23.2% to 99.9%.