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Adsorption of surfactants onto acrylic ester resins with different pore size distribution

science china Chemistry 2006年第5期49卷 445-453页

作者： YANG Weiben1,2,3.LI Aimin1,3.CAI Jianguo1,3.MENG Guanhua1,3.& ZHANG Quanxing1,3.1. State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,nanjing university,nanjing 210093.{3. 2. nanjing College of Chemical technology,nanjing 210048,{3. 3. Jiangsu Engineering & technology Research Center for Organic Toxicant Control and Resource Reuse,nanjing 21003.,{3. 1. State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China 2. nanjing College of Chemical technology Nanjing 210048 China 3. Jiangsu Engineering & technology Research Center for Organic Toxicant Control and Resource Reuse Nanjing 210038 China

In this study, a series of acrylic ester resins with different pore size distribution were prepared successfully by varying the type and the amount of pore-forming agents. In order to inves-tigate the adsorption behavior and mechanism of surfactants on acrylic ester resins, three kinds of surfactants were utilized as adsorbates that were sodium 6-dodecyl benzenesulfonate (6-NaDBS), sodium 1-dodecyl benzene sulfonate (1-NaDBS) and sodium 1-dodecyl sulfonate, respectively. It was observed that the surface area was available in a particular pore size and an appropriate pore size of resins appeared to be more important for the adsorption of surfactants. As compared to commercial acrylic ester resins XAD-7 and HP2MG, 50# and 3.# resins exhibited more excellent adsorption properties toward 1-NaDBS and 6-NaDBS. The experimental equilibrium data were fitted to the Langmuir, and double-Langmuir models. Two models provided very good fittings for all resins over the temperature range studied. The investigation indicated that electrostatic attraction and hydrogen bond between resins and surfactants were the main forces and had an obvious effect on adsorption proc-ess.

关键词： acrylic ester resin, surfactant, adsorption, pore size distribution, isotherm.

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Quantitative structure－activity study on the reductive dehalogenation potency of the halogenated aromatics

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Journal of Environmental sciences 1995年第2期7卷 183-189页

作者： Huang Qingguo Wang Liansheng Han Shuokui(Department of Environmental science and technology, nanjing {3. , nanjing 210008 , china) Dept of Envmlt Sci & Tech Nanjing Univ Nanjing China

Ｑｕａｎｔｉｔａｔｉｖｅｓｔｒｕｃｔｕｒｅ－ａｃｔｉｖｉｔｙｓｔｕｄｙｏｎｔｈｅｒｅｄｕｃｔｉｖｅｄｅｈａｌｏｇｅｎａｔｉｏｎｐｏｔｅｎｃｙｏｆｔｈｅｈａｌｏｇｅｎａｔｅｄａｒｏｍａｔｉｃｓＨｕａｎｇＱｉｎｇｇｕｏ；... 详细信息

Ｑｕａｎｔｉｔａｔｉｖｅｓｔｒｕｃｔｕｒｅ－ａｃｔｉｖｉｔｙｓｔｕｄｙｏｎｔｈｅｒｅｄｕｃｔｉｖｅｄｅｈａｌｏｇｅｎａｔｉｏｎｐｏｔｅｎｃｙｏｆｔｈｅｈａｌｏｇｅｎａｔｅｄａｒｏｍａｔｉｃｓＨｕａｎｇＱｉｎｇｇｕｏ；ＷａｎｇＬｉａｎｓｈｅｎｇ；Ｈａｎ...

关键词： quantitative structure - activity relationship(QSAR) halogenated arornatics dehalogenation poten-cy discriminant function.

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The mathematical model of wetting angle of heterogeneous nucleation

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science china(Technological sciences) 2004年第4期47卷 391-397页

作者： HUANG Cheng1, SONG Bo1, MAO Jinghong2 & ZHAO Pei3.1. School of Metallurgical and Ecological Engineering, university of science and technology Beijing, Beijing 100083.{3. 2. School of Material science, university of science and technology Beijing, Beijing 100083.{3. 3. Central Iron and Steel Research institute, Beijing 100081,{3. 1. School of Metallurgical and Ecological Engineering University of Science and Technology Beijing 100083 Beijing China 2. School of Material science University of Science and Technology Beijing 100083 Beijing China 3. Central Iron and Steel Research institute 100081 Beijing China

The heterogeneous nucleation has been analyzed in terms of the thermodynamic theory, and the mathematical model of wetting angle of heterogeneous nucleation has been developed based on the dynamic requirements of hetero- and homogeneous nucleation. With the wetting angel model, the wetting angles of different catalysts in liquid iron have been calculated. The result shows that the wetting angle of most catalysts is smaller than 40, and the value of f() is far less than 1. The wetting angles of TiN, TiC and RE2O3.are smaller, while the wetting angle of MnO is bigger among the ordinary nucleation catalysts. The wetting angles calculated by this model are in agreement with the results of other research work.

关键词： heterogeneous nucleation, mathematical model, wetting angle, undercooling.

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Three-dimensional investigation of velocity skin effect in U-shaped solid armature

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Progress in Natural science:Materials International 2008年第12期18卷 1565-1569页

作者： Xin Li~a Chunsheng Weng~b a School of Power Engineering,nanjing university of science and {3.,nanjing 210094,china b National Key Laboratory of Transient Physics,nanjing university of science and {3.,nanjing 210094,china [a]School of Power Engineering Nanjing University of Science and Technology Nanjing 210094 China [b]National Key Laboratory of Transient Physics Nanjing University of Science and Technology Nanjing 210094 China

A three-dimensional transient computational model is applied to investigate the velocity skin effect (VSE) in a U-shaped solid arma- *** this model,current and heat transport in the armature can be evaluated *** results show a local concentration of current and joule heating at the interface,and significant damage occurs at the edges of the *** is also observed that there is significant enhanced heating at sharp comers because of the armature *** three-dimensional model can efficiently capture the salient features of the physical phenomena at the rail-armature interface,and contribute to the development of the armature design.

关键词： Electromagnetic launch Railgun U-shaped armature Velocity skin effect Erosion

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Preparation and Characterization of Nanocomposite MgFe_2O_4/SiO_2

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Journal of Wuhan university of technology(Materials science) 2009年第3期24卷 354-358页

作者：徐莉 College of science Nanjing Forestry University

Nanocomposites MgFe2O4/SiO2 were successfully synthesized by the sol-gel method in the presence of N, N-dimethylformamide （DMF）. The formation of pure MgFe2O4 was confirmed by powder X-ray diffraction （XRD） and electron diffraction. The structural evolution of MgFe2O4 nanocrystals was followed by powder X-ray diffraction and IR absorption spectroscopy. The formation of spinel structure of MgFe2O4 started at 800 ℃, and completed at 900 ℃, The transmission electron microscopy （TEM） measurements suggest that the particle sizes increase with the increasing annealing temperature, and the mean particle sizes of the spherical samples annealed at 800 ℃, 900 ℃ and 1 050 ℃ are ca. 3.nm, 8 nm and 11 nm, respectively. Magnetization measurements at room temperature and 78 K indicate supemaramagnetic nature of these MgFe2O4 nanocrvstals.

关键词： nanocomposite sol-gel magnesium ferrite magnetic property

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The Class of the Generalized αk-Major Efficient Solutions for Multi-objective Programming

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Journal of Systems science and Systems Engineering 2001年第4期13卷 439-442页

作者： XU Ze-shui institute of sciences, pla university of science and technology, {3. 210016, Jiangsu, china institute of sciences PLA University of Science and TechnologyNanjing 210016 Jiangsu China

This paper proposes the concepts of generalized αk-major efficient solutions and generalized αk- major optimal solutions for multi-objective programming, and studies their some important properties.

关键词： multi-objective programming generalized αk-major efficient solutions generalized αk-major optima1 solutions

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A study of two-dimensional magnetic polaron

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science china(Physics,Mechanics & Astronomy) 2006年第4期49卷 421-429页

作者： LIU Tao1, ZHANG Huaihong1, FENG Mang1,2 & WANG Kelin1,3.1. School of science, Southwest university of science and {3., Mianyang 621010, china 2. Wuhan institute of Physics and Mathematics, Chinese Academy of sciences, Wuhan 43.070, china 3. Department of Modern Physics, university of science and {3. of china, Hefei 23.026, china School of science Southwest University of Science technology Mianyang 621010 China Wuhan institute of Physics Mathematics Chinese Academy of Sciences Wuhan 430070 China Department of Modern Physics University of Science technology of china Hefei 230026 China

By using the variational method and anneal simulation, we study in this paper the self-trapped magnetic polaron (STMP) in two-dimensional anti-ferromagnetic material and the bound magnetic polaron (BMP) in ferromagnetic material. Schwinger angular momentum theory is applied to changing the problem into a coupling problem of carriers and two types of Bosons. Our calculation shows that there are single-peak and multi-peak structures in the two-dimensional STMP. For the ferromagnetic material, the properties of the two-dimensional BMP are almost the same as that in one-dimensional case; but for the anti-ferromagnetic material, the two-dimensional STMP structure is much richer than the one-dimensional case.

关键词： self-trapped magnetic polaron, bound magnetic polaron, impurity potential, anti-ferromagnet.

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Early Hydration of Composite Cement with Thermal Activated Coal Gangue

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Journal of Wuhan university of technology(Materials science) 2010年第1期25卷 162-166页

作者：郭伟 Department of Material Engineering Yancheng Institute of Technology institute of Material science and Engineering Nanjing University of Technology

Composite cement samples were prepared by mixing clinker, gypsum with burnt coal gangues which was calcined at various temperatures. The mechanical strength and Ca（OH）2 content in the cement paste were tested, and the paste composition and microstructure were analyzed by thermogravimetry-differential thermal analysis （TG-DSC）, X-ray diffraction（XRD）, scanning electronic microscopy （SEM） and pore structure analysis. Results demonstrate that the thermal activated coal gangue could accelerate the early hydration of cement clinker obviously, which promotes the gangue hydration itself. The early hydrated products of the cement are C-S-H gel, Ca（OH）2 and AFt. The cement with 3.% （in mass） the gangue exhibits higher mechanical strength, and among all the cement samples the one with the gangue burnt at 700 ℃ displays the highest hydration rate, mechanical strength, the most gel pores and the lowest total porosity.

关键词： blended cement hydration microstructure hydration product

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NEW ACHIEVEMENTS ON THE THEORY AND technology OF EXPLOSIVE WELDING

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Acta Metallurgica Sinica(English Letters) 2003年第6期16卷 531-537页

作者： C.G. Shi, Y.H. Wang, L.G. Cai and C.H. ZhouEngineering institute of Engineering Corps, pla university of science and technology, nanjing 210007,{3. Engineering institute of Engineering Corps PLA University of Science and Technology

There are four new achievements of this work on the theory and technology of explosive welding.(1) It has been found and defined three kinds of bonding interfaces: big wavy, small wavy and micro wavy, and the micro wavy interface is the best. In a cladding plate, it is for the first time to find that the form of interface presents regular distribution.(2) Although the interface has the features of melt, diffusion and pressure welding in the mean time, the seam and 'hole' brought by the melt weaken the bonding strength of interface greatly, and the effect of melt on interface must be eliminated in explosive welding, so explosive welding is not a melt weld. The diffusion welding is a kind of form of pressure welding, and the diffusion is not the reason of the bonding of interface but the result of interface high pressure. So the diffusion welding cannot also explain the bonding mechanism of it. The experiment and theory make clear that explosive welding is a special pressure one.(3. To get good interface of no melt, explosive charge must be selected on the low limit of welding windows. In explosive welding, the drive plate should be treated as the viscous and plastoelastic body, not incompressible fluid. The bending moment under the explosive welding loading must be greater than that under dynamic limit of drive plate. According to the condition, the lower limit of explosive welding is obtained. It is about 20% less than that obtained by tradition calculation, and suitable for engineering application.(4) It is for the first time to test and study on soil anvil characteristics and change regularity under explosive welding impact loading. Through soil anvil parameter optimization analysis, it is the best for explosive welding with sandy soil of water content 17.00% and density 1.74q/cm3.

关键词： explosive welding bonding interface pressure welding low limit

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林克明旧居修缮与活化利用,广州,广东,中国

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世界建筑 2024年第8期 64-69页

作者： Guangdong Architectural Design and Research institute Group Co.,Ltd. Architectural Design and Research institute of South china {3. of technology 广东省建筑设计研究院集团股份有限公司华南理工大学建筑设计研究院有限公司

街区断点更新林克明旧居(简称旧居)193.年由中国第一代著名建筑师林克明设计建造。旧居所在的越秀北路原为民国初年广州城墙拆除后的城基路,城外即东濠涌,前后高差达8m。林克明巧妙地利用地形组织功能与空间,并采用摩登建筑理念,使建筑... 详细信息

街区断点更新林克明旧居(简称旧居)193.年由中国第一代著名建筑师林克明设计建造。旧居所在的越秀北路原为民国初年广州城墙拆除后的城基路,城外即东濠涌,前后高差达8m。林克明巧妙地利用地形组织功能与空间,并采用摩登建筑理念,使建筑形体呈现出迷人的风采。

关键词：建筑形体建筑理念活化利用功能与空间著名建筑师林克明修缮城墙

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