饮料中颗粒沉降时间的预测

本文根据沉降理论，应用分离因数的概念，提出了预测饮料中颗粒沉降时间的方法。较好地解决了饮料中颗粒均匀悬浮的问题。     

Temperature behaviour of titania field emitters realized by suspension plasma spraying

Titania field electron cathodes made with solution precursor plasma spraying (SPS) were investigated. The emission characteristics were measured using a self-made installation. Microstructure analysis was carried out using scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The electron emission was found to decrease with increasing temperature of tested samples. This was explained in terms of the coating microstructure and, in particular, the phase content and change in dielectric properties of coating components.     

车辆悬挂系统研究的现状和未来

The main purpose of using suspension system in vehicles is to raise their velocity. As the speed of the vehicle is higher and higher,the study on suspension system is advanced. From rigid suspension to elastic suspension,and from passive suspension to active suspension,the main purpose is to raise vehice's velocity. This paper describes the new development about the vehicle's suspension system and it's future development.     

悬索桥锚碇可更换无粘结预应力锚固系统试验研究

本针对我国目前悬索桥锚碇预应力锚固系统存在耐久性差的问题,提出了耐久性好、更加安全可靠的,具有“可检测”、“可更换”特点的新型油脂防腐预应力锚固系统。该系统经过了动静载及变形试验,安装、换油、换预应力钢束施工工艺试验,研究成果应用于悬索桥锚碇工程。     

苏丹共和国TUTI大桥缆索系统施工

简要介绍了苏丹共和国TUTI大桥缆索结构,以及主缆的架设、辅助猫道的架设及调整、索夹与吊索的安装等上部悬吊结构关键施工技术。     

Suspension polymerization based on inverse Pickering emulsion droplets for thermo-sensitive hybrid microcapsules with tunable supracolloidal structures

Polymerization using Pickering emulsion droplets as reaction vessels is being developed to become a powerful tool for fabrication of hybrid polymer particles with supracolloidal structures. In this paper, two kinds of thermo-sensitive hybrid poly(N-isopropylacrylamide) (PNIPAm) microcapsules with supracolloidal structures were successfully prepared from suspension polymerization stabilized by SiO₂ nanoparticles based on inverse Pickering emulsion droplets. SiO₂ nanoparticles could self-assemble at liquid-liquid interfaces to form stable water-in-oil inverse Pickering emulsion. NIPAm monomers dissolving in suspended aqueous droplets were subsequently polymerized at different temperatures. The hollow microcapsules with SiO₂/PNIPAm nanocomposite shells were obtained when the reaction temperature was above the lower critical solution temperature (LCST) of PNIPAm. While the core-shell microcapsules with SiO₂ nanoparticles' shells and PNIPAm gel cores were produced when the polymerization was conducted at the temperature lower than LCST using UV light radiation. The supracolloidal structures with different cores could be tuned by simply changing reaction temperature, which was confirmed by confocal laser scanning microscopy and scanning electron microscopy. The interesting properties of both microcapsules were their ability of reversibly swelling during drying/wetting cycles and responsive to temperature stimulus. Such functional microcapsules may find applications in double control release system due to the presence of the supracolloidal structures and thermo-sensitivity.     

Gravity consolidation-sedimentation behaviors of concentrated TiO2 suspension

Consolidation-sedimentation behaviors of consolidated sediment under action of gravity were investigated using highly concentrated suspension of titanium dioxide particles under conditions of various pHs, initial heights, and initial concentrations. The average consolidation ratio of the consolidated sediment was analyzed on the basis of the simplified analytical solution obtained using the modified Terzaghi's model under the moving Lagrangian coordinate system. Although the solution pH strongly affects consolidation-sedimentation behaviors, the modified average consolidation coefficient was little influenced by the solution pH. Also, the consolidation coefficient increased in almost direct proportion to the total volume of solids per unit cross-sectional area, which changes the driving force of consolidation-sedimentation due to the overlying weight of the solid particles. The variations with time of the height of the consolidated sediment were adequately described using the analytical solution describing the average consolidation ratio with the aid of the relation that the equilibrium height was represented by a power function of the total volume of solids for a specified pH.