水性双组分聚氨酯的分散混合和成膜

叙述了水性双组分聚氨酯体系的多元醇组分和多异氰酸酯 ,论述了水性双组分体系的分散混合和成膜。     

使用PVB膜片作为安全玻璃夹层的常见问题与改进方法

研究了聚乙烯醇缩丁醛（PVB）膜片、浮法玻璃和夹玻工艺对夹层安全玻璃的影响,探讨夹玻的各个工序中出现不正常的原因,并提出解决问题的应对方法,提高了最终制品的质量,实现夹玻的科学生产.     

Tensile strength and morphological investigation of SiC-coated carbon fibers

SiC-coated film onto carbon fibers as a barrier of oxidation resistance and reaction between carbon fibers and metals was investigated. The chemical vapor deposition of silicon carbide onto carbon fibers was performed at various temperatures ranging from 700 to 1000°C using triisopropylsilane vapor carried by hydrogen gas. The strength of the SiC-coated carbon fibers was decreased due to deterioration of fibers and chemical attack of hydrogen on the surface of carbon fibers during the coating process. The oxidation and the thermal resistance of the SiC-coated carbon fibers compared to the uncoated carbon fibers were improved at temperature range of 600–800°C and 1000–1200°C, respectively. Morphological change by air oxidation at temperature range of 500–800‡C was also investigated for the SiC-coated and the uncoated carbon fibers, respectively. The SiC-coated film between carbon fiber and aluminum was sufficient as a barrier of reaction on carbon fiber reinforced aluminum at temperature of above 1000°C.     

Energetic surface heterogeneity of nanocrystalline TiO<Subscript>2</Subscript> films for dye-sensitized solar cells

Dye sensitized solar cells (DSSCs) have been receiving significant attention because they have many advantages compared to conventional organic solar cells. It has been known that the photovoltaic characteristics of DSSC are highly dependent on the adsorption properties of dyes on TiO₂ films. To analyze the surface heterogeneity of TiO₂ surfaces, single-phase anatase nanocrystallite titanium films were prepared by sol-gel method using the hydrolysis reaction of titanium tetraisopropoxide under acidic condition and characterized by XRD, FE-SEM and BET analysis. The adsorption energy distribution functions were calculated by the generalized nonlinear regularization method. It was found that the shape and the intensity of the adsorption energy distribution curve determined were highly related with the physical properties (i.e., geometrical heterogeneity) and chemical characteristics (i.e., energetic heterogeneity) of nanocrystalline TiO₂ for DSSC.     

Protoporphyrin-modified gold surfaces for the selective monitoring of catecholamines

Protoporphyrin IX (PPIX) was immobilized on Au surfaces for the electrochemical oxidation of dopamine (DA) and epinephrine (EP). Two procedures for the immobilization were employed. One class of modified electrodes was prepared by immobilizing the PPIX into polypyrrole (PPy) films synthesized by anodic electropolymerization. The other procedure involved the immobilization of PPIX on an electrode modified by a 11-mercaptoundecanoic acid (MUA) self-assembled monolayer (SAM). The modified surfaces were characterized by cyclic voltammetry (CV).The efficiency of these modified surfaces for the electrochemical oxidation of DA and EP was investigated and compared. The peak potential for the oxidation of each analyte at the different electrode surfaces was determined by square-wave voltammetry (SWV).The dependence of the sensitivity of the electrodes for the detection of the catecholamines on the applied potential was also measured. The SAM-based electrodes showed better selectivity for detecting DA in the potential range between 0.2 and 0.4 V versus Pt (QRE). However, higher sensitivity and linearity were observed for the film-based electrodes.     

气体分离膜综述

介绍了一种新兴的化工单元操作-气体膜分离，对膜分离器及其应用产生的效益进行了阐述，并展望了今后的发展方向。     

低苯乙烯散发不饱和聚酯树脂研究

用单官能团醇对不饱和聚酯树脂改性，合成了苯乙烯质量分数为30％和W01树脂，对W01树脂的挥发性和反应性进行了测定，研究了成膜助剂对01树脂性能的影响，并与通用型191树脂和一种亚克力板层间粘合用不饱和聚酯树脂进行了比较；指出结合成膜助剂的W01树脂进一步降低苯乙烯的散发。     

镁合金石墨砂型铸件表面氧化膜的组成与结构

利用XPS(X射线光电子能谱 )对镁合金石墨砂型铸造时的表面氧化膜进行了分析 ,探讨了表面氧化膜的组成与结构。结果表明 :镁合金表面氧化膜呈层状结构 ,主要由MgO和Mg(OH) 2 组成 ,由于表面氧化膜中有大量C原子的渗入 ,增加了致密度 ,使其具有较好的防护性能     

工业射线照相胶片系统的分类和胶片处理的控制

介绍国际标准ISO11699及依据该标准而制订的国家标准的主要内容，目的在于使我国无损检测工作者能更好地了解和采用标准所规定的方法。该标准规定了工业射线照相胶片系统(由胶片和胶片处理组合而成)的分类方法和胶片处理的控制方法。该方法能有效地保证射线照相的影像质量，目前已被许多国家采用。     

JB/T 4730-2005与SY/T 4109-2005标准射线部分的主要区别

比较了JB／T 4730-2005《承压设备无损检测》和SY／T 4109-2005《石油天然气钢质管道无损检测》两个标准射线部分的不同之处，包括射线源和能量的选择、透照次数、底片质量和质量分级等方面，便于无损检测工作者更好地理解标准和准确地使用标准，从而保证无损检测工作质量和工程焊接质量。