Sherwin-Williams推出水性环氧防静电地坪涂料

美国宣伟公司(Sherwin-Williams)日前向市场推出公司首款水性环氧防静电地坪涂料体系。该涂料体系由宣伟公司保护涂料与海洋涂料业务单元研发,包括GeneralPolymers3425E型防静电水性环氧涂料以及3424型导电水性环氧底漆,目标是在提供更优秀功能性的同时,以环境友好型体系代替传统溶剂型防静电地坪涂料。3425E型产品是高固体分、双组分环氧体系,可单独用于地坪涂料也可用作普通地坪涂料的面漆,它采用静电耗散     

水性集装箱涂料两种主流配套体系的对比

介绍了目前水性集装箱涂料的2种主流配套体系(Ⅰ型和Ⅱ型),从涂层配套、涂层功能和涂层特点等方面将水性集装箱涂料2种配套体系及溶剂型集装箱涂料配套体系进行了对比,分析了各自的优缺点,列举了水性集装箱涂料2种主流体系的施工实例,为涂料生产企业、集装箱生产和应用企业选择适合的涂料配套体系提供相应的参考.     

水性金属防腐蚀涂料所用基料现状及发展

按涂料所用树脂分类,评述了丙烯酸体系、环氧体系、无机硅酸锌体系和聚氨酯体系等4类水性防腐蚀涂料体系,重点介绍它们的合成技术进展。尽管水性防腐蚀涂料与溶剂型相比还存在不足,但只要设计和施工得当,水性防腐蚀涂料在许多情况下可以胜任。指出当前水性防腐蚀涂料的研究重点是新型成膜聚合物和防腐蚀颜填料的选择与制备,涂料配方及合成工艺的优化,建议我国涂料企业应抓住"量大面广"品种,大力发展水性金属用防腐蚀涂料产品。     

水性涂料在混凝土防腐中的应用

随着水性涂料的不断发展和成熟,混凝土防腐用水性涂料体系也不断涌现。结合交通行业中混凝土桥梁防腐涂料标准及防腐技术条件,以及具体的涂料使用环境和工程实践,介绍了水性环氧类混凝土防腐涂料体系、水性丙烯酸类混凝土防腐涂料体系、清水混凝土用水性氟硅透明涂料体系等三类目前使用较为广泛的混凝土防腐用水性涂料体系及其各自特点。     

铝合金列车车厢用涂料的研制

研制了铝合金列车车厢用的高性能、高装饰性涂料。介绍了该涂料体系的环氧底漆和聚酯聚氨酯面漆的配方和生产工艺,比较了该涂料体系同国外同类涂料的性能指标。讨论了影响涂料体系性能的因素。     

毕克化学推出新涂料表面活性剂

继成功开发溶剂型涂料体系助剂byk-silclean3700之后,毕克化学（byk）又推出最新的一款bvk-silclean3720添加剂,该助剂可以有效改善涂料表面,防止灰尘等颗粒的吸附。新的byk-silclean3720适用于水性双组分涂料体系、高温烘干体系和UV同化的涂料体系。新的添加剂发挥作用主要依靠其强大的表面活性,通过改变涂料表面涂层的活性,使其具有疏水和疏油的双重特性。同时,byk-silclean3720也能有效地降低涂料体系内的极眭作用,使涂料具备易清洁的性能。     

紫外光固化涂料的研究进展

介绍了紫外光固化涂料的构成体系：自由基光固化体系、阳离子光固化体系和阳离子与自由基混合光固化体系。对紫外光固化涂料的制备方法进行了综述,并简介几种新型紫外光固化涂料。     

常温固化型丙烯酸聚氨酯涂料的研制

研制了具有高性能、高装饰性和耐候型的涂料，该涂料可常温固化，介绍了该涂料体系的含羟基丙烯酸共聚树脂的配方和生产工艺，对该涂料体系进行了性能指标测试，讨论了影响涂料体系性能的因素。     

传承涂料工业百年史 重铸辉煌

回顾我国涂料工业百年史。剖析了我国涂料工业与世界涂料强国的差距。提出了涂料企业创新体系、营销创新体系和企业文化理念,重铸我国涂料工业辉煌。     

聚偏氟乙烯树脂在建筑涂料中应用及性能改进

简述了PVDF树脂在建筑涂料中应用、涂料基本配方以及PVDF涂料涂装技术,汇总了当前PVDF聚合过程改进、涂料配方专用助剂溶剂开发、水体系涂料开发等方面的最新进展,并提出了今后国产PVDF树脂及其涂料的发展建议,特别要重视水体系涂料开发,以减少涂料中的挥发性有机化合物.     

定量分析法测定核酸的技术进展

介绍核酸的定量分析方法，包括化学发光法、光度分析法、荧光分析法、共振光散射分析法及电化学分析法等方法，评述各方法的特点及研究进展情况。     

Lewis Award Paper: Some Perspectives on Chemical Engineering Analysis

Personal teaching experiences are discussed using an analysis logic diagram which stresses experimental efforts and the need to make students aware of uncertainties in any significant problems they will face. The critical issues are illustrated using a reactor analysis which has been made into an interactive design game for the Web. The analysis logic is also briefly illustrated for mass contactor and heat exchanger analysis. © 2011 American Institute of Chemical Engineers AIChE J, 2012     

高铁酸盐分析方法研究进展

高铁酸盐可以用作超铁电池储能阴极材料,也是新型绿色有机合成氧化剂和水处理药剂.日益广泛的应用需要精准的分析测试方法.综述了高铁酸盐的定性、定量分析方法,包括红外光谱、紫外可见光谱、滴定分析、XRD、穆斯堡尔谱、电化学分析、荧光分析法等,详述了分析方法原理及适用范围.     

IMPROVED NON-FOURIER FREQUENCY ESTIMATION OF SAMPLED STATIONARY TIME SERIES

A general multi-component cyclic descent least-squares model used in conjunction with a power-of-two fast Fourier transform to perform the harmonic analysis presents numerous advantages over their individual use. Through the appropriate choice of a window taper and a linear filter applied to the time series data, severe leakage is effectively reduced by decreasing the interference between peaks throughout the band. The taper and filter characteristics are dependent on the given application. The resulting assembled frequency components are updated iteratively by means of the least-squares model

A brief portion of this study is devoted to the development of the Fourier transform as a general spectral estimator. Particular attention is given to its limitations. Methods for improving frequency identification in the transform are covered. A brief development of the cyclic descent least-squares model is given as a means of reducing errors inherent in a Fourier analysis. A numerical example is presented depicting the method.     

单氰胺生产新工艺分析

对２０００ｔ／ａ５０％单氰胺水溶液生产新工艺作了技术经济分析,重点进行了不确定性分析,找出了风险因素,并得出了相应结论。     

An overview on controllability analysis of chemical processes

Controllability is one of the most important aspects of chemical process operability, because it can be used to assess the attainable operation of a given process and improve its dynamic performance. The purpose of this article is to outline the main methodologies that have been developed to deal with the assessment of process controllability and the improvement of its controllability characteristics. Several existing controllability assessment methods are reviewed and discussed. For improving the controllability characteristic of a process, there are two main design methods: the optimization‐based method and the controllability indices‐based anticipating sequential method. Advantages and disadvantages of these techniques are discussed. It has been emphasized that bifurcation analysis, as a powerful nonlinear analysis tool, could provide important guidance for making processes more controllable by eliminating or avoiding some undesirable behaviors of processes. Further challenges and developments in the field of process controllability are identified. © 2010 American Institute of Chemical Engineers AIChE J, 2010     

Catalyst Characterisation and Preparation Using Sample Controlled Thermal Techniques—High Resolution Studies and the Determination of the Energetics of Surface and Bulk Processes

This paper summarises some applications of advanced thermal techniques for the characterisation and preparation of catalysts using different sample controlled thermal analysis (SCTA) methods. The techniques are applied to temperature programmed decomposition (calcination), oxidation, reduction, dehydration, desorption and reaction. SCTA methods can produce significant enhancements in the resolution of complex reactions, provide a detailed insight into the energetics of surface and bulk processes and, when applied to catalyst preparation, give improvements in the pore structure and uniformity of the resulting materials. The advantages and limitations of SCTA methods, in which the sample temperature or concentration of reactant gas is altered as some function of the rate of a thermally induced physico-chemical process, are discussed.     

基于傅立叶谱与小波分析的抛光机磨头故障诊断研究

以陶瓷抛光机的关键工作部件-磨头及其驱动系统为研究对象，对其振动信号进行了采集并运用FFT频谱分析和小波分析的方法，准确地提取了磨头的故障特征频率，找出了磨头出现异常振动的原因，提出了控制措施。     

Spectral analysis of blacks

The spectral behavior of different black surfaces including papers and fabrics are investigated in this study. Several colored pigments are mixed with the blacks in different concentrations to prepare black surfaces with different shades while a series of black dyestuffs are applied on textile materials to increase the ranges of black objects. The principal component analysis technique is applied to determine the actual spectral size of the reflectance dataset. The technique simply extracts the principal directions of spectral data and organizes them in restricted spectral spaces. Three different spectral spaces, i.e., the reflectance spectra, the Kubelka‐Munk function of reflectance as well as the inverse of reflectance factor are selected to present the samples in the restricted spaces. Based on the results, it is found that, there are no significant differences between the employed spaces and far from the employed spectral domains, black surfaces could be adequately described in a three‐dimensional space. The three extracted statistical colorants are used for reconstruction of reflectance spectra of samples while the root mean square error percentage and the color difference values under the standard observing condition confirm the suitability of such virtual primaries. The work is extended to reconstruction of spectral data from colorimetric information and the adequacy of such three‐dimensional space is reconfirmed. © 2011 Wiley Periodicals, Inc. Col Res Appl, 2012     

清凉寺窑汝瓷和张公巷窑青瓷釉的起源关系

为了探讨宝丰清凉寺窑汝瓷与汝州张公巷窑青瓷釉之间的关系,选取清凉寺窑汝官瓷釉样品31个,汝民瓷釉样品4个和张公巷窑青瓷釉样品32个,用中子活化分析(neutron activation analysis,NAA)测定每个样品中的24种元素的含量,并将NAA数据进行主成分分析及等级聚类分析.结果表明:常见着色元素Fe和Co汝官瓷釉的含量显著高于张公巷窑青瓷釉样品;汝官瓷釉料配方比较稳定,原料来源集中;汝民瓷釉料产地分散,且与汝官瓷釉料配方明显不同;张公巷窑青瓷釉料比较分散,但大部分样品与汝官瓷关系较近.由此,可以推断清凉寺窑与张公巷窑之间存在一定的联系.