The Open Materials Science Journal最新文献

{"title":"Ni(II) and Cd(II) Simple and Competitive Adsorption on ActivatedCarbon Oxidized. Influence of the Oxidant Agents H2O2 and NaClO","authors":"Miguel A. Sánchez, P. Rodríguez-Estupiñán, L. Giraldo, J. Moreno-Piraján","doi":"10.2174/1874088X01509010020","DOIUrl":"https://doi.org/10.2174/1874088X01509010020","url":null,"abstract":"Granular activated carbon, GAC, modified by oxidation with H 2 O 2 and NaClO aqueous solutions and heat treatment at 900 °C. The N 2 adsorption isotherms at −196 °C and SEM and FTIR results were used to characterize the properties of the prepared ACs. Textural parameters such as BET surface area and pore volumes were assessed by gas adsorption. The BET surface area values of solids are between 687 and 876 m 2 g -1 . Additionally immersion enthalpies of activated carbons in benzene, water, hydrochloric acid and sodium hydroxide solutions and Ni(II) and Cd(II) solutions of 500 mgL -1 were determined, with values between 32 and 145 Jg -1 . Ni(II) and Cd(II) adsorption isotherms were determined at pH 6 on activated carbons and competitive adsorption tests were realized between the two ions. The results show that for the tests carried out, the adsorption capacity decreases when the content of chemical groups on the surface also decreases. Finally, the experimental results of the adsorption from solution were adjusted to the Langmuir and Freundlich models and a better fit with the first was found. With maximum adsorption capacities values for Ni(II) between 3.99 and 64.9 mgg -1 for Cd(II) between 2.61 and 55.2 mgg -1 . Values for competitive adsorption ions present in solution, Ni(II) and Cd(II), on the activated carbons, diminishes compared to those obtained in simple adsorption, this indicates the effect of the an ion competitive presence in adsorption another.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"1 1","pages":"20-27"},"PeriodicalIF":0.0,"publicationDate":"2015-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79903036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Properties of Shuffle Screw Dislocations in Semiconductors Siliconand Germanium","authors":"Huili Zhang, Chun Zhang, C. Zeng, Lumei Tong","doi":"10.2174/1874088X01509010010","DOIUrl":"https://doi.org/10.2174/1874088X01509010010","url":null,"abstract":"The width, Peierls barrier and stress for shuffle screw dislocation in Si and Ge have been calculated by the improved P-N theory. The calculated widths are about 0.6b, b is the Burgers vector. The Peierls barriers for shuffle screw dislocations in Si and Ge are respectively about 3.61~4.61meV/A and 5.31~13.32meV/A, Peierls stresses are 1.40~2.07 meV/A 3 and 1.93~3.29 meV/A 3 . Our calculated results may correspond to the metastable core of the shuffle screw dislocation which is centred on the bond between two atoms.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"111 1","pages":"10-13"},"PeriodicalIF":0.0,"publicationDate":"2015-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85879231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on High-Temperature Glass Lens Molding Process Using FEM Simulation","authors":"Zhang Xiaobing, Yin Shaohui","doi":"10.2174/1874088X01509010014","DOIUrl":"https://doi.org/10.2174/1874088X01509010014","url":null,"abstract":"The glass molding process (GMP) can press glass perform into a shape of finished lens under high pressure and temperature conditions, and it is easy to achieve mass production. So, it has emerged as a promising alternative way to produce complex shapes lens. It is well known that viscoelastic is one important properties of glass at high temperature. In this study, A 4-pair generalized maxwell model was used to express viscoelastic of glass, and model parameters were obtained by fitting the relaxation curve obtained from experiment. The finite element models were established by MSC.MARC, the correctness of the FEM models and its used model parameters were verified by the cylindrical compression experiments. Finally, the simulations of glass lens forming stage were performed under different conditions. Stresses distribution were predicted by FEM, it was found that the maximum stress at the edge of lens, which make lens rupture easily at this zone. It was also discovered that the molding temperature is higher, the less stress, and the molding velocity is higher, the higher stress.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"58 1","pages":"14-19"},"PeriodicalIF":0.0,"publicationDate":"2015-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74391508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and Performance Research of WPU Modified by Nanopolyphosphazenes","authors":"C. Jianbing, Ning Xiangli, Huang Wenjing, Wang Jiangjie","doi":"10.2174/1874088X01509010006","DOIUrl":"https://doi.org/10.2174/1874088X01509010006","url":null,"abstract":"It is reported in this paper that waterborne polyurethane (WPU) can be modified by nanopolyphosphazenes fibers, which had benn prepared containing hydroxyl groups, followed by reaction with WPU. At the same time, physical blends had also been carried out in the experiments. The results showed that the tensile strength of the WPU films through chemical modification containing 0.5 wt% fibers is 1.22 MPa, and that the elongation at break is 1294.50%. This data have significantly increased when compared against WPU, in which the elongation at break is only 785.50%. The thermal decomposition temperature of the WPU modified by nanopolyphosphazenes is 50 % higher than that of WPU. At the same time, its preparation method had some influences on the mechanical properties of the composite materials.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"35 1","pages":"6-9"},"PeriodicalIF":0.0,"publicationDate":"2015-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85565933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, Crystal Structure of Mg(II) Complex Material and itsApplication as Catalysts for A3 Coupling Reaction","authors":"X. Tai, Li-li Liu","doi":"10.2174/1874088X01509010001","DOIUrl":"https://doi.org/10.2174/1874088X01509010001","url":null,"abstract":"The ligand of 1, 2-phenylenedioxydiacetic acid (H2L) has been employed to react with MgCl2·6H2O in water/ethanol solution (v:v = 1:1), to yield a novel Mg(II) complex (MgL(H2O)3)·3.5H2O. The complex was characterized by infrared spectroscopy and single crystal X-ray diffraction structural analysis. The results show that the Mg(II) complex belongs to monoclinic, space group C2/c with a = 2.9160(6) nm, b = 0.67617(14) nm, c = 1.7319(4) nm, β = 109.06(3)°, V = 3.2275(11) nm 3 , Z = 8, Dc= 1.562 µg·m −3 , µ = 0.184 mm −1 , F (000) = 1560, and final R1 = 0.0703, ωR2 = 0.2256. The complex molecules form a 3D network structure through hydrogen bonds and π-π stack. The A 3 coupling reaction of phenylacetylene, aldehyde and amine (piperidine) in the presence of Au@Mg(II) complex as an efficient heterogeneous catalyst has been studied.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"16 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2015-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73096227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupling Model of Energy Flow and Material Flow in SKS Lead Smelting","authors":"Hongcai Wang, Zhangming Shi, L. Lin, Bo Chen","doi":"10.2174/1874088X01408010131","DOIUrl":"https://doi.org/10.2174/1874088X01408010131","url":null,"abstract":"This paper studies the coupling model of material flow and energy flow in the production process of lead smelting enterprises, and establishes the mathematical model for material flow and energy flow to resolve optimization problems. From the point of energy flow, the paper analyses three kinds of energy flow change which effect on the enterprise products. Through calculation and analysis, there is 38.42% energy- saving potential in this enterprise. Separately from the material flow and energy flow angle, the paper puts forward five aspects suggestions to reduce the energy consumption of enterprise products.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"67 1","pages":"131-135"},"PeriodicalIF":0.0,"publicationDate":"2014-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73783336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on Magnetic Property of Nd2Fe14B/α-Fe Nanocomposite Under Different Roller Speeds","authors":"Maoyuan Liu, Lei Chen","doi":"10.2174/1874088X01408010127","DOIUrl":"https://doi.org/10.2174/1874088X01408010127","url":null,"abstract":"Nano-composite permanent magnetic material is a new type permanent magnetic material, and it is the synthesis of soft and hard magnetic phase within nanoscale. On the basis of exchange coupling hard magnetizing theory, nano-composite permanent magnetic material can at the same time have high residual magnetization intensity of soft magnetic phase and high coerccivity of hard magnetic phase, and is expected to develop into new generation high performance permanent magnetic material. Nevertheless, magnetic energy product of nano-composite permanent deriving from experiment differs greatly from theoretic value, and this is mainly due to fairly great difference between micro- structure of material and theoretical model. In this paper, the constituent is taken as (Nd, Pr, Dy)2(Fe, Nb)14B/α-Fe, the fusant rapid quenching method is adopted to research the impact of different roller speeds to magnetic property, through result of VSM, XRD and SPM, magnetic property, phase composition and micro structure of alloy are analyzed.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"113 1","pages":"127-130"},"PeriodicalIF":0.0,"publicationDate":"2014-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83446330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Overlapping Collector on Orientated Deposition of Electrospun Nanofibers","authors":"C. Fang, Yan-long Jiang, Lei Xu","doi":"10.2174/1874088X01408010119","DOIUrl":"https://doi.org/10.2174/1874088X01408010119","url":null,"abstract":"Standard electrospinning deposits disorderly nanofibers on a conducting collector owing to unstable whipping of the jet. Nevertheless, biological engineering requires orderly electrospun nanofibers to improve mechanical properties and cellular proliferation. An attempt is made to fabricate well-orientated nanofibers by applying an overlapping collector. It turns out that electrospinning deposits random and disorderly nanofibers as usual even if conducting aluminum foil, as a collector, overlaps insulating poly(ethylene terephthalate) (PET) film. When insulating PET film overlapping aluminum foil is applied as a collector, the PET film accumulates ions to repel the whipping filament in the space while non- overlapping aluminum foil attracts the filament such that electrospinning deposits orientated nanofibers on the insulating PET film.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"13 1","pages":"119-121"},"PeriodicalIF":0.0,"publicationDate":"2014-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87319418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cutting Properties Analysis of Titanium Alloy (Ti-6Al-4V) Base on Cryogenic Cooling","authors":"T. Rui, Hou Li, Zhang Qi, Z. Bo","doi":"10.2174/1874088X01408010122","DOIUrl":"https://doi.org/10.2174/1874088X01408010122","url":null,"abstract":"This paper studied the cutting properties of Ti-6Al-4V under cryogenic cooling to find a solution of improvement in tool load-carrying, thermal stress, tool life and finish quality. Firstly, this paper established a 3-D cutting model of Ti-6Al-4V under cryogenic cooling with liquid nitrogen, and then set the parameters of material, friction model and cutting conditions. Based on this model, the results of chips' shape, cutting forces and temperature distribution were obtained in the simulation with different cooling approaches. The results reveal that the cryogenic cooling with liquid nitrogen can slightly increase the main cutting force but it canefficiently cool the cutting area, and the cooling will contribute to the deformation of chips and improving the finish quality. Titanium alloy is widely applied in modern advanced equipment manufacturing industry because of its superior comprehensive performance, especially the aerospace field. But with the features of small thermal conductivity, low modulus of elasticity, strong chemical activity, and easily reacting with surrounding medium under the cutting temperatures, which reduce the cutting performance of titanium alloy greatly, and limiting its applications in many important areas. Now turning is still the most important methods in titanium alloy processing, where many scholars have engaged researches, most of the work focused on the following three aspects: the cutting tool material, cutting parameter optimization and cooling approaches. Researches have showed that the control of cutting temperature is the key to prolong tool life, improve the machining efficiency and quality. High pressure and large flow cutting fluid is commonly used in early titanium alloy's cutting to reduce the temperature of cutting area, inhibit the high temperature chemical activity of titanium alloy, and thus prolong tool life. With the deepening of the research, people found that by reason of titanium alloys poor thermal conductivity and small cutting contact area, it is easy to bring about stress and thermal concentration, additionally, the penetration ability of traditional cutting fluid is poor, thus, traditional cooling cannot meet the production requirements with the increase of cutting speed. In recent years, with the introduce of the concept of green manufacturing, many scholars who committed to strong air cooling cutting, low temperature freezing cutting, liquid nitrogen (LN2) cooling cutting, MQL (Minimal Quantity Lubrication)and other new type of cooling method research, have achieved positive results. The LN2 cooling with its good cooling and lubricating effect and environmental-friendly character has attracted many attentions from researchers.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"28 1","pages":"122-126"},"PeriodicalIF":0.0,"publicationDate":"2014-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90931474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifractal Detrended Cross-Correlation Analysis of Geochemical Element Concentration","authors":"Wan Li, Yongqian Zhu, Xiaocheng Deng, Jiaoxiu Lin","doi":"10.2174/1874088X01408010136","DOIUrl":"https://doi.org/10.2174/1874088X01408010136","url":null,"abstract":"We use multifractal detrended cross -fluctuation analysis (MF-DXA) to investigate nonlinear behavior of geochemical element concentration, Au-Cu-Pb-Zn-Ag, in Shangzhuang Deposit, Shandong Province, China. We find that the generalized Hurst exponent h(q) and cross-correlation exponent h xy (q) decrease with the increase of q, which indicate that all element concentration series and their cross pairs exhibit multifractal phenomena. By comparing the variability of h(q) and h xy (q), we have found that the multifractal behavior is more obvious when q > 0 than q < 0 for the element Au- Cu-Pb-Zn and their cross pairs. These analyses, given quantitative information about the complexity of the element concentration, lead to a better understanding of the geochemical phenomena underlying mineralization process.","PeriodicalId":22791,"journal":{"name":"The Open Materials Science Journal","volume":"22 1","pages":"136-140"},"PeriodicalIF":0.0,"publicationDate":"2014-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73383953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}