淮阴站泵站变电所GIS设备预防性试验及局部改造

泵站SF_6全封闭组合电器是20世纪70年代初期出现的一种先进的高压电气配电装置,国际上称这种设备为Gas-Insulater Switchgear(GIS)。GIS由断路器、母线、隔离开关、电流互感器、电压互感器、避雷器、套管等电器元件组合而成。其绝缘介质为SF_6气体。由于它具有优良的技术性能和占地面积小的特点,在国内外获得广泛应用。本文对淮阴站变电所GIS预防性试验及检查内容进行简要介绍,并结合2017年两个间隔三通气室微水试验超标进行分析探讨,提出了相应的防范和解决措施。     

共炭化对热缩聚及炭化工艺过程的影响

采用煤沥青闪蒸油为原料,乙烯残油为添加剂,在实验室内进行热缩聚及炭化实验。结果表明:加入添加剂后,缩聚沥青的平均分子结构得到改善,从而显著改善了针状焦的显微组织结构,同时具有良好的脱氮效果。     

不同颜色体系的UV丝印油墨中光引发体系的选择

使用紫外-可见分光光度计测得了黄、蓝、橙、紫4种颜料的紫外吸收图谱;在模型化的丝印油墨配方中改变光引发剂的种类,运用指压法和指抠法研究了多种光引发剂对含有这4种颜料的UV油墨的引发速度的影响。结果表明不同颜色的颜料对紫外光的吸收区域和吸收强度是不同的。对于黄色油墨,907的引发效果最佳;对于蓝色油墨,907+ITX+EDAB和910+ITX+EDAB都具有很高的引发速度;而对于橙色油墨和紫色油墨,907+ITX+EDAB则是速度最高的引发剂组合。     

用于燃油节能环保的有机稀土活性复合物的制备及应用

由有机稀土配体化合物、表面活性剂、助表面活性剂、稳定剂、溶剂等原料制备出有机稀土活性复合物。通过柴油机台架实验发现,该种复合物的加入不仅对柴油机节能、抗磨损及保护发动机起到积极的作用,同时能有效降低尾气中有害物质的排放。     

Synthesis and characterization of superabsorbent hydrogels composites based on polysuccinimide

A kind of novel superabsorbent hydrogel with high swelling ratio property that could be used for the development of water absorbing resin, soil water retention agent, and chemical sand‐fixing material was synthesized in this study. The hydrogels were prepared by the crosslinking reaction of polysuccinimide (PSI). The relationships between swelling ratio and volume of solvent as well as the concentration of crosslinking agent were investigated in detail. Several composites, such as starch, carrageenan, and polyacrylamide, were added into hydrogels to enhance the swelling ratio. It was found that the swelling ratio was significantly increased, which the maximum water absorbency was enhanced 2.46 times when the composite polyacrylamide (PAM) was added compared to the control. The effects of ionic strength and sensitivity of pH on hydrogels were also studied. The modified hydrogels products with swelling ratio less sensitivity to the salinity as well as relative high swelling ration in salinity system were also obtained by adding PAM. Through the Fourier transform infrared spectroscopy (FTIR) characterizations, the crosslinking reaction mechanism and the structure of composite were proposed. In addition, the transmission electron microscopy (TEM) examinations showed that some composite materials elevated the physical crosslinked and connected channels density substantially. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 550–557, 2006     

环氧树脂-聚丙烯酸酯乳液型复合薄膜粘合剂

本文主要叙述了环氧-丙烯酸酯聚合乳液的合成,以及该乳液粘合剂的配制;讨论了该乳液粘合剂的粘合性能及耐水、耐溶剂性能。     

New software developments for quality mesh generation and optimization from biomedical imaging data

In this paper we present a new software toolkit for generating and optimizing surface and volumetric meshes from three-dimensional (3D) biomedical imaging data, targeted at image-based finite element analysis of some biomedical activities in a single material domain. Our toolkit includes a series of geometric processing algorithms including surface re-meshing and quality-guaranteed tetrahedral mesh generation and optimization. All methods described have been encapsulated into a user-friendly graphical interface for easy manipulation and informative visualization of biomedical images and mesh models. Numerous examples are presented to demonstrate the effectiveness and efficiency of the described methods and toolkit.     

PVC/TPU/NBR三元共混物的制备及性能研究

对PVC／热塑性聚氨酯（TPU）／SR三元共混物的性能进行研究，重点讨论NBR品种、TPU／NBR并用比、PVC聚合度、增塑剂DOP和硫化剂DCP用量对PVC／TPU／NBR三元共混物性能的影响。结果表明。PVC／TPU／NBR-3604三元共混物的物理性能较优；PVC／TPU／NBR-3604三元共混物的拉断伸长率和拉断永久变形均随着PVC聚合度的增大基本呈上升趋势；随着增塑剂DOP用量的增大，共混物的邵尔A型硬度、拉伸强度、撕裂强度和拉断永久变形均基本呈下降趋势，拉断伸长率增大；随着硫化剂DCP用量的增大。共混物的拉伸强度和拉断伸长率变化不大，撕裂强度基本呈逐渐减小的趋势。不同PVC／TPU／SR三元共混物的扫描电子显微镜照片表明，NBR与PVC和TPU的相容性较好。     

一步法合成5-甲基海因

以氰化钠、碳酸铵、乙醛等为原料，常压下一步反应得到５甲基海因，总收率７０２％。其最佳操作条件为：反应温度７５℃，反应时间３ｈ，原料碳酸铵与氰化钠之比为２∶１，酸化回流ｐＨ值为２，酸化回流时间２ｈ。