改性丙烯酸-环氧树脂纳米乳液的制备及应用

介绍了水性丙烯酸-环氧树脂纳米乳液的制备及其在油罐防腐工程中的应用。讨论了亲水侧链聚乙二醇相对分子质量大小对涂膜性能的影响以及乳化剂各组分的用量对乳液粒径的影响。     

Studies on film potentiometric stripping analysis: effects of electrochemical parameters

Film potentiometric stripping analysis (PSA) is a novel method for concentrating the test ion directly on a glassy carbon electrode with subsequent stripping by a chemical oxidant, the redissolution step being followed by a chronopotentiometric sequence. The electrochemical parameters governing both preconcentration and redissolution steps are studied on a rotating disk electrode: experimental results are compared with the theoretical developments recently published. Except for the influence of rde rotation rates on each step and on analytical parameters, experiments and theory are in agreement. Discrepancies concerning the rotation rate effects are studied by potentiostatic coulometry and voltammetry measurements in regard to the preconcentration step: the rotation rate effects are based on the physical behaviour of the rde. Routine analysis is carried out using film PSA, Pb(II) as the test ion and Fe(III) as oxidizing agent, in perchlorate medium.     

石英晶体微天平的研究进展综述

石英晶体微天平(QCM)能够感知到纳克级的质量变化,在分析化学、电化学、有机化学、生物医学等方面得到了广泛的应用。根据与QCM电极表面相接触的研究介质即应用对象的不同,分别阐述了刚性薄层、牛顿流体、粘弹性膜层的基础方程、分析方法及应用,并探讨了其存在的问题与发展趋势。     

应用静电纺丝法制备PZT纳米纤维薄膜

提出应用静电纺丝法制备PZT纳米纤维薄膜。研究中配制PZT溶液后再进行静电纺丝,获得了PZT纳米纤维薄膜,并且通过调整纺丝时间和沉积次数来控制纳米纤维薄膜的厚度。运用SEM对获得的热处理前后的薄膜进行了观察对比,测量其平均直径约为200 nm;运用XRD对退火后的样品进行分析,测得样品的主要成分为Pb(Zr0.52Ti0.48)O3,证明所制备的正是PZT薄膜;运用AFM测得薄膜的表面粗糙度为1.034 nm,说明该纳米薄膜材料非常的均匀整齐。     

基于电子印刷工艺的薄膜热电偶研制

薄膜热电偶由于具有体积小、热容量小及响应速度快等优点成为近年来学者们研究的重点。薄膜制备常用的方法有射频溅射法、离子镀膜法以及直流脉冲磁控溅射法等,但这些方法操作设备复杂,制作时间长,效率低,成功率低且复现性差。用电子印刷工艺制备薄膜热电偶,将Au,Pt的溶液化微纳米材料印制在基板上,印刷成为Au-Pt薄膜热电偶,该方法操作方便快捷,对电极材料污染小。通过试验证明:采用电子印刷工艺制备的Au-Pt薄膜热电偶符合Au-Pt热电偶检定规程的要求,热电偶精度高,重复性和一致性好。     

Preparation,characterization, and adsorption properties for metal ions of a novel chelating resin containing sulfoxide and diethylene glycol

A novel chelating resin containing sulfoxide and diethylene glycol, poly{4‐vinylbenzyl‐[2‐2‐(hydroxyethyl)ethoxyl]sulfoxide} (PVESO) was synthesized using chloromethylated polystyrene (PS‐Cl) as material. Its structure was characterized by elemental analysis, infrared spectra, and scanning electron microscopy (SEM). The adsorption capacities of the resin for Hg²⁺, Ag⁺, Cu²⁺, Zn²⁺, and Pb²⁺ at various pH values were determined. The maximum adsorption capacities for Hg²⁺ and Ag⁺ were 1.56 and 0.75 mmol g^?1 respectively. The resin had high selectivity for Hg²⁺ and Ag⁺ over the pH range 1.0–7.0. The adsorption capacities for Hg²⁺ and Ag⁺ under competitive condition were also determined by batch experiment method. In addition, the adsorption kinetics of the resin towards Hg²⁺ at different temperatures was also investigated. The results showed that the adsorption rate was governed by film diffusion at 20°C and 25°C, by particle diffusion at 30°C and 35°C. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 6054–6059, 2006     

国内BOPP膜生产现状

介绍了国内BOPP薄膜和专用料的生产情况，并提出了建议。     

降膜波动特性的研究

本文提出了一种测定膜厚的新方法－双电导探针法，测定了高湍流降膜的厚度沿降膜管管程的变化情况，探讨了径向平均膜厚及膜厚的概率密度分布沿管程的变化规律，证明降膜的波动特性同时受到液相雷诺数和管程的影响。并对平均膜厚和液相雷诺数作了经验关联，得出NT＝（δ^ )^2/3 [8.92(ReL/4)^5/2 6.0×10^-6(ReL/4)^9/2]^2/15。