液态金属实验回路(LMEL)的总体设计和运行

液态金属实验回路（ＬＭＥＬ）是国内唯一用于聚变堆磁流体动力学（ＭＨＤ）效应和材料相容性研究的大型实验装置。与国外同类先进的装置相比，回路流程和运行方式均有重大改进，使其更先进、安全并具有多功能。回路运行分为两个阶段：第一阶段以钠－钾低共熔合金（２２Ｎａ７８Ｋ）为工质，研究ＭＨＤ效应，ＬＭＥＬ的最大哈特曼（Ｈａｒｔｍａｎｎ）数Ｍ和相互作用参数Ｎ分别为０．７５×１０４和２．５×１０４；第二阶段以液态锂为工质，研究结构材料与锂的相容性，最高温度和流速分别为５２０℃和１．３８ｍ／ｓ。     

高效液相色谱定量分析煤衍生重质产品

针对煤衍生重质产品的组分分析,以高效液相色谱（HPLC）研究了其定量问题。首先,建立高分辨的色谱分离体系,使组分得以好的分离和定性。对各分离组分定量测定采用了外标法和外标-定量因子法。实验表明准确定量的技术关键在于：溶解样品溶剂的合理选择;配制样品溶液浓度的正确控制;配制样品溶液的进一步处理技术。     

射频电容液位计在海上溢油液位检测中的应用

简单介绍了射频电容液位计进行油水双液位检测的基本原理,阐述了海上溢油回收检测装置的基本构造及其工作过程。针对海上特殊应用环境的测量需求,提出分别按油、按水标定的液位检测方案。油水混合状态下,对2组实验测试数据进行误差和线性度的数值计算,通过曲线拟合对比分析,最终确定了海上溢油回收集油箱油位检测的最优化方案—按油标定检测。实验证明,该方案可以满足现场实际测量环境的要求,液位计的测量精度高、线性度好。     

液晶微透镜阵列研究进展

液晶微透镜阵列是基于微透镜光子技术和液晶技术而发展起来的学科交叉研究领域。就液晶微透镜阵列的工作原理、主要设计方法及其研究进展进行了论述,并对微透镜阵列的发展趋势及尚待解决的问题进行了总结。     

内标淬灭校正法测定尿中氚浓度

氚引起的内照射对人体伤害非常大,因此评估涉氚人员的氚内照射水平十分重要。为满足快速准确评估人员氚摄入水平的要求,本研究在原尿直接测量法的基础上,采用内标淬灭校正法,对三名涉氚工作人员尿液中的氚放射性浓度进行测量,评定测量结果的不确定度,并估算该方法的探测下限。测量结果表明,李、胡、黄三位工人的尿中氚的放射性浓度分别为94.9、554、898 Bq/L,与氧化蒸馏法测量结果的偏差均在4%以内。该方法操作简便、快捷,准确性较高,可以满足涉氚工作人员的尿氚监测和内照射剂量快速准确评价的要求。     

MIXING/SEGREGATION POTENTIAL IN BINARY LIQUID FLUIDIZED BEDS

The mechanism underlying mixing/segregation of binary particles in liquid fluidized beds is reviewed and investigated in this paper. Binary mixtures of particles, when fluidized, sometimes segregate and display a behaviour called layer inversion, At low fluid velocities, one of the components is primarily found in a discrete layer at the bottom of the bed, while the other is predominantly at the top. At higher fluid velocities, the order of arrangement is reversed. The literature provides a variety of explanations for this phenomenon, derived from quite different theoretical bases. A comparative analysis of these different approaches is presented here together with the experimental results available in the literature. Based on the best model, further experimental investigation is carried out to provide; (i) comprehensive criteria to predict whether a given binary mixture of any type (both size and density variant, size variant only, density variant only) will mix/segregate or show layer inversion, and (ii) mixing/segregation regime map in terms of size ratio and density ratio of the particles for a given fluidizing medium. Therefore, knowing the properties of given particles, a second type of particles can be chosen in order to avoid or to promote segregation according to the particular process requirement.     

SOLVENT EXTRACTION WITH ORGANOPHOSPHONIC MONO-ACIDIC ESTERS

Mono-acidic liquid ion exchangers (extractants) containing the phosphonyl functional group arc reviewed.     

The Electro-Optical Effect of LC Cells by the Processing Parameter of PI Alignment Layer

The electro-optic characteristics of Liquid Crystal Displays (LCDs) are deeply affected by those parameters including the kinds of liquid crystals and alignment layer materials, the forming conditions of alignment layer, the substrates alignment mode and the processing conditions of rubbing alignment in the interface treatment. In this study, differential scanning calorimeter (DSC), thermal gravity analysis (TGA) and moisture analyzer are utilized to examine the properties of liquid crystals and PI alignment layer materials. The interface treatment between liquid crystals and PI alignment layers were executed via the alignment technology of unidirectional mechanical rubbing with a rayon velvet cloth. Those LC cell specimens were fabricated using Merck MJ99159 N_P liquid crystal and PI alignment layer material (JSR-AL 21000) with various process conditions. Under those parameters influence of curing, rubbing and alignment direction, cell specimens display various electric-optical effects.     

Membrane‐dispersion reactor in homogeneous liquid process

For homogeneous liquid processes, mixing at molecular scale may influence selectivity, yield and quality of final products. In a membrane‐dispersion reactor, microporous membranes are employed as dispersion media for controlled feeding of one solution into another one to intensify micromixing. The reactor has been widely used in the preparation of nanoparticles, preparation of nanocapsules and liposomes, synthesis of polymers, parallel and consecutive reactions to improve nanoparticles quality, molecular weight distribution of polymer, or selectivity of complex reactions. This paper reviewed the progress of the membrane‐dispersion reactor in homogeneous liquid processing including features, applications, advantages and limits. © 2012 Society of Chemical Industry .