R-N-[CH_2PO(OH)_2]_2型甲叉膦酸在硫酸溶液中的缓蚀作用

用线性极化法研究了０．１０ｍｏｌ／ＬＨ２ＳＯ４溶液中乌洛托品、ＡＴＭＰ（氨基三甲叉膦酸）、ＭＡＤＭＰ（甲胺二甲叉膦酸）、ＢＡＤＭＰ（正丁胺二甲叉膦酸）和ｎＨＥＤＰ（羟基乙叉二膦酸）的缓蚀作用．结果发现,三种甲叉膦酸－ＡＴＭＰ、ＭＡＤＭＰ和ＢＡＤＭＰ对１Ｃｒ１３不锈钢均有明显的缓蚀作用,其缓蚀率远大于乌洛托品和ＨＥＤＰ．三种甲叉膦酸都属于混合型缓蚀剂,其吸附服从Ｌａｎｇｍｕｉｒ吸附等温式,吸附的平衡常数分别为２．６７×１０３Ｌ／ｍｏｌ（ＡＴＭＰ）、０．８５×１０３Ｌ／ｍｏｌ（ＭＡＤＭＰ）和０．５５×１０３Ｌ／ｍｏｌ（ＢＡＤＭＰ）分子中各官能团对缓蚀作用贡献大小的次序为：－ＣＨ２ＰＯ（ＯＨ）２＞－ＣＨ３＞－ｎＣ４Ｈ９。     

乙基香兰素的合成研究

文章用溴素法合成3-溴-4-羟基苯甲醛,再通过乙氧基化合成乙基香兰素。对反应温度、反应时间、原料配比、溴化剂的滴加速度等影响中间物产率的因素进行了研究。在溴化阶段使用氯仿作溶剂,乙酸乙酯作助溶剂,提高了一溴化物的产率,大大节约了生产成本;在乙氧基化步骤中用CuO作催化剂,用乙醇和DMF作反应溶剂,对原料配比和催化剂用量做了研究,使得产率达到82.5%。     

MF和EDT表面对汽车铝板的成形性能影响试验

汽车铝板常见的两种表面形貌MF表面和EDT表面对汽车铝板的性能尤其是冲压成形性能影响较大。选取力学性能接近的具有MF和EDT两种表面形貌的各2种6016汽车铝板,系统研究了表面形貌对6016汽车铝板表面性能和成形性能的影响规律。试验结果表明:EDT铝板的表面粗糙度是MF铝板的2.5~4倍;EDT铝板比MF铝板有更高的成形极限FLD_0;MF和EDT两种铝板的表面摩擦系数、弯曲性能和拉深性能相近。     

植物源杀虫剂2.5%洋金花生物碱水剂开发应用技术研究

报道了植物源农药２．５％洋金花生物碱水剂研制及应用技术的最新成果,从１９９５－１９９７年进行室内,田间药效试验结果表明,２．５％洋金花生物碱水剂,１１２．５－１８７．５ｇ／ｈｍ＾２对甘兰蚜虫,菜青虫防治效果７９．５４％－９０．６０％。     

磁性纳米Fe3O4在磁场协助作用下的流态化研究

磁性纳米Fe3O4的密度及黏性较大,透气性差,在传统流化床中很难实现“正常”流态化。实验采用外加磁场能的方法来改善这种状况,外加磁场、铁磁性大颗粒并与流化性能较好的非磁性物料混合流化。实验发现在一定磁场强度、添加质量分数及表观气速下,纳米Fe3O4的流诧性能得到改善,其在流化床中形成的大聚团得到有效的破碎,床层膨胀增加,压降趋子一个稳定值,最小流化速度降低,床层可以实现比较均匀的流化。     

Preparation and Properties of Hollow Glass Microsphere/Silicone Rubber Composite Material with the Transition Layer of Silicone Resin

Silicon - Hollow glass microsphere (HGM)/silicone rubber composite material was prepared by using silicone resin as the transition layer between silicone rubber and HGM. Silane coupling agent was...     

Pseudocapacitive contributions to electrochemical kinetics in NiOx electrochromic anodes

Because of its ability to change optical absorption dynamically by applied electric field, nickel oxide (NiO) is a promising anodic material in smart windows, which can improve energy conversion efficiency in construction buildings. Although many works have achieved high electrochromic performance with different method. The underlying mechanism is still not fully investigated. In this article, we prepared the NiO films with large specific surface area and high stability by electron beam evaporation. X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were employed to figure out the surface morphology and composition of as-deposited films. Afterwards, the electrochemical properties and optical performance of the prepared NiO films were investigated. On this basis, the origin of surface charge was fully analyzed by cyclic voltammetry and diffusion coefficient test. These experimental and theoretical results firmly confirm that both the surface reaction and capacitive effect bring about the excellent EC performance in NiO films. These results not only provide clear evidence about electrochemical kinetics in NiO films, but also offer some useful guidelines for the design of EC materials with higher performance and longer stability.     

A simple micro-mixer prototyped in polycarbonate

In this paper, we report on first stage results on our work on the design and prototyping of a simple polycarbonate micro-mixer. CFD simulations indicate that the elliptical shape of the mixer appears to eliminate dead volumes and to result in more uniform flow and hence more uniform mixing. The mixer has also been characterised spectrophotometrically in a simple way. A simple design may be advantageous in that it may be more reliable in the micro-scale. It is certainly easier to manufacture.The authors would like to thank Drs Jason Pickering and Hu Banghong for their valuable and constructive criticisms during the preparation of this short communication.