The application of natural sedimentation for the dispersion of polyacrylamide microspheres

The research objectives of this article consist of development of appropriate apparatus and process to apply natural sedimentation for preparing polyacrylamide microspheres industrially. The kettle height of the apparatus should be more than 2 m to provide adequate sedimentation distance for microspheres, and the inner wall of kettle was made of non-polar materials to prevent microspheres from adhering to the wall. The natural sedimentation was used to replace dispersant to maintain the dispersion. Affordable, non-toxic, and non-pollutant corn oil was used as the dispersion medium. Furthermore, single factor synthesis and multi-factor analysis of variance were used to optimize the process.     

A complete three-dimensional finite element analysis of the bar-bar tensile impact apparatus

A complete three-dimensional FEM model of the Bar-Bar Tensile Impact Apparatus (BTIA) is constructed, in which the slots in the bars and the glue layers between the bars and the flat-shaped specimen are included. For elastic-plastic specimen material, Ly12cz aluminum alloy, the process of tensile impact experiments is simulated and the matching relation between the specimen geometry and the bars is investigated. Based on the FEM analysis, an iterative method is proposed to design a reasonable specimen geometry for obtaining the true dynamic stress-strain relation for a certain specimen material. The project supported by the National Natural Science Foundation of China (19272061)     

用改进的ZCS-1型智能测硫仪快速测定氟石中的硫

研究了用ZCS－1智能测硫仪测定氟石中硫的方法,与经典燃烧磺酸钾容量法相比,具有快捷,简便,危害性小,精度高等优点,本法的相对标准偏差小于8．57％（n=11),是一种较好的测硫方法。     

Fabric Touch Tester: Integrated evaluation of thermal–mechanical sensory properties of polymeric materials

A new test apparatus was designed to evaluate the thermal–mechanical properties of fabric made from polymeric materials in one step. The results of statistical analysis reveal that the sensations of fabric–skin touch under non-sweating conditions like smoothness, softness, prickliness, warmth and dampness can be predicted using the measurements of this apparatus. Heat transfer properties (HF_min) in a fabric play an important role in warmth/dampness perception, which alone accounts for 63.6% and 56.0% of the variance in warmth and dampness perception, respectively. Fabric compression properties (FC_mean) account for 69.5%, 77.0% and 66.7% of the variance in smoothness, softness and prickliness perceptions, respectively.     

Experimental determination of the solubility of aromatic compounds in aqueous solutions of various amines

A new apparatus to measure solubility data of aromatics in aqueous solutions has been designed. It is based on a static-analytic method with Rolsi™ pneumatic samplers for on line gas chromatograph analysis. Operating pressures and temperatures are between 0.3 and 10 MPa and between 293 and 393 K.

Solubility measurement results are reported for several aromatic compounds (benzene, toluene, ethylbenzene and xylene) in different amine aqueous solutions (monoethanolamine (MEA), diethanolamine (DEA), methyldiethanolamine (MDEA), diglycolamine (DGA)). Several influent parameters are studied (temperature, total pressure, etc.).     

纯液体饱和蒸气压测定实验的改进

对纯液体饱和蒸气压测定实验进行了装置创新设计,该装置解决了该实验的一些关键问题:保证相平衡时的气相为纯液体蒸气;准确测定相平衡时的温度;方便有效地调节外压与液体蒸气压相等。改进后的装置设计合理,操作简单、快捷,消除了安全隐患,大大缩短了实验时间,可一人单独操作。     

金属有机骨架材料低温储氢性能测试装置

设计了一套金属有机骨架(MOFs)材料低温储氢性能测试装置。该装置的设计压力为10MPa,可以在低温宽温区范围内对多种金属有机骨架材料的低温储氢性能进行测试,且样品更换方便。此外,还介绍了试验的原理及步骤。     

一种新型循环微波萃取装置及其应用

介绍了一种自行设计制作的循环微波萃取装置 ,具有自动化程度高的特点 ,适用于实验室复杂样品的前处理 ,对改进样品前处理方法具有一定实用价值。该装置已用于提取银杏叶中的总黄酮测定其高效液相色谱指纹图谱。