钛白粉包膜过程中打浆分散剂选择的实验研究

针对钛白粉包膜过程中适宜的料浆分散剂进行了选择实验研究,实验中发现pH值对各种分散剂的分散性能有较大的影响,指出为节约生产成本,应加强在生产过程中对分散剂的加入量梯度研究。     

分散剂涂覆处理对碳纤维在油性基体中分散性能的影响

目的获取效果较好的碳纤维在油性基体中的分散处理方法。方法采用IW,SCAT,MLBH(脂肪醇醚磷酸酯盐)和TEDPS四种分散剂对碳纤维进行涂覆处理,之后于溶剂油D80中分散,以表面电荷量和浊度值对其分散性进行评价,并分析分散剂浓度、分散剂类型、碳纤维长度、分散体系碳纤维浓度对分散效果的影响。对最佳条件下分散前后的碳纤维进行表面形貌结构与化学组成的对比表征。结果采用四种分散剂对碳纤维表面进行涂覆处理,均能有效改善碳纤维在油性材料中的分散性,其中以油溶性离子型表面活性剂MLBH的处理效果最好。分散剂浓度存在一最佳值;碳纤维越长,越不利于分散;分散体系碳纤维浓度越低,越有利于分散。结论 MLBH最佳浸丝浓度为0.3%(质量分数)。考虑到工业应用需求,浸丝后的碳纤维以长度10 mm、质量浓度50 mg/L进行分散时,分散效果最好。     

多羟基超分散剂对水性环氧涂层防腐性能的影响

通过开路电位测量、电化学阻抗谱测试、动电位极化曲线测试、附着力测试等手段，研究了多羟基超分散剂对水性环氧清漆防腐性能的影响。结果表明，在3.5%NaCl溶液中，环氧清漆和含分散剂的环氧清漆的失效历程相同，可分为4个阶段：涂层快速吸水阶段、涂层腐蚀产物生成阶段、稳定腐蚀阶段和腐蚀产物扩散阶段。含分散剂的环氧清漆表现为较强的吸水性，多羟基超分散剂增加了涂层的饱和吸水率，加快了涂层的腐蚀失效。     

在醇酸涂料中的纳米TiO2分散性及涂层耐磨性

 在制备涂料中，颜料的分散是非常重要的，本文选择了一种非离子型的表面活性剂作为纳米TiO2在醇酸涂料中的分散剂，用激光粒度仪得到了涂料体系中的TiO2的粒度分布曲线.并结合TEM照片观察到了在有分散剂和没有分散剂时，纳米粉TiO2的分散状态.同时比较了含有不同含量TiO2(mass%)及含有普通钛白粉的涂层耐磨性，结果表明，有4%的纳米TiO2涂层耐磨性最好.       

多种表面处理剂协同作用改善颜料级钛白水分散性研究

从分析钛白粉体在水中的分散行为入手，提出了采用两种不同的助分散剂协同作用，对产品进行表面处理的技术方案。研究了每种表面处理剂的最佳用量，提出了表面处理剂的工艺配方，研究了配方的稳定性和通用性，取得了理想的实验结果。     

国家经贸委发布涂料近期发展导向

发展各类环保型(水性、高固体分、粉末、辐射固化)涂料;发展内外墙建筑涂料;以钛渣替代钛铁矿改变硫酸法钛白粉生产原料路线;积极推进氯化法钛白粉生产的发展。     

一种环保水性抗静电防腐蚀涂料的性能研究

在水性环氧树脂及固化剂双组分体系中,采用浅色导电云母粉和钛白粉,优选环保型防锈颜料,运用扫描电镜、激光粒度分析仪、表面电阻率测试仪等分析手段研究了导电云母粉的粒径、用量、搅拌分散速度、钛白粉用量以及防沉剂的种类对涂层抗静电性的影响;研究了树脂/固化剂比例、体系颜料体积浓度及防锈颜料种类对涂层综合性能的影响;制备出了一种兼具良好抗静电性、优异防腐蚀性以及良好装饰性的环保水性抗静电防腐蚀涂料。     

硫酸法钛白生产中水解工艺的优化及其对成品质量的影响

从攀钢钛白粉厂的几次改造入手，从理论上分析了水解操作过程对成品质量的影响，并找出水解操作中影响成品质量的主要因素，结合攀钢钛白生产中水解工艺的优化具体分析后得出结论：在外加晶种加压水解法，外加晶种微压水解法以及自生晶种常压水解法这3种方法中，最后一种方法更为合理，产品质量也最好。     

水性透明隔热涂料中纳米 ATO 的分散技术

为解决纳米ATO在水中的分散问题,通过沉降实验和测定Zeta电位,考查了pH值、分散剂及其用量、研磨时间等对纳米ATO浆料分散稳定性的影响,得出了最佳分散条件:采用高分子型分散剂Tech-6300,pH值8～9,研磨时间为12 h。对最佳分散条件制备的ATO水性浆料进行粒径检测和透射电镜观察,结果表明,ATO水性浆料的粒径在100 nm以内,达到了纳米级别,分散稳定性较好。     

TiO2纳米粒子改性有机醇酸涂料性能研究

利用金红石型TiO2纳米粒子改性醇酸涂料提高醇酸涂料的各种性能.结合物理和化学分散，并选取合适的分散剂，解决了TiO2纳米粒子在醇酸涂料中的分散问题；性能测试结果表明，与普通钛白粉醇酸涂层相比，TiO2纳米粒子改性醇酸涂层具有很强的抗紫外线性、强耐盐雾性以及较高的耐磨性能.     

Liquid chromatography and mass-spectrometry analysis of transformation products of plasticizers and antifreezing agents for concrete formed during its use

The present study considers the transformation products of a number of compounds, including ones used as plasticizers and antifreezing agents for concrete, which can liberate ammonia during exploitation of the concrete products. We have analyzed plasticizers, antifreezing agents, and products of their transformation that are leached by water and/or organic solvents. The analysis procedure has been used for analysis of concrete samples from a real construction site.     

Anticor type Romanian made corrosion inhibitors for refinery and petrochemical plant equipment

The anticorrosion treatment of refinery and petrochemical units in many cases are using corrosion inhibitors. SC ZECASIN‐Brazi is a research and manufacturing company specialised in following products: neutralizers, cathodic inhibitors, organic inhibitors, filmforming inhibitors, antifouling agents, biodispersant agents, inhibitors for chemical decrustation, passivators. The products are manufacturing under the name “ANTICOR”. The corrosion tests have been performed using gravimetric, volumetric, electrochemical and metallographic methods. Recommendations for the continuous use of the inhibitors have been made, based on the results of the laboratory, pilot and industrial scale tests. The effect of using inhibitors mentioned is in 80% decreasing of the corrosion process, and previous localized corrosion and blistering by diffussion of atomic hydrogen.     

国内外不锈钢精炼剂研究发展现状

分析了精炼剂组元元素的作用能力，讨论并总结了精炼剂组元的复合作用，介绍了几种国内、国外精炼剂产品，提出发展高效复合精炼剂的想法。     

应用电弧喷涂技术制作塑料加工用模具的试验研究

应用电弧喷涂制作塑料加工用模具（电弧喷涂制模）是一种快速、低成本制作塑料加工用模具的有效技术、本文根据对此项技术的试验研究结果，介绍了电弧喷涂制模技术中，脱模剂的选择；浇注填充材料的选择；制模工艺过程等。最后指出了此项技术的应用领域和发展趋势。     

车辆润滑油极压抗磨添加剂的性能及其复配效应

现代科学技术的进步，使机器设备正朝着高速、重载和高精度方向发展，而润滑油品的质量是决定机器设备运行可靠性和延长其使用寿命的重要因素之一，而改进润滑油添加剂的性能并开发其复配技术，则是提高油品质量的关键。本文就一些常见的极压抗磨剂的性能，与其他添加剂之间的复配效应以及在边界润滑和混合润滑状态下，与摩擦表面形成的化学保护膜的形、价态、结构等特性进行了分析和归纳，并提出系统地研究添加剂间的复配效应以及与不同摩擦副材料、改性层、涂层间的协同效应，是今后应值得重视的课题。     

Modified Means for Corrosion Protection of Aluminum Alloys. 1. Estimates of Effectiveness of R-3b and EP-060tsb Compositions

Accelerated corrosion and outdoor climatic (Cuba) testing of standard and newly developed agents and systems designed for the purpose of preventing the development of exfoliation and microbiological corrosion types on metal samples and structural parts were carried out. Recommendations on using most effective agents are given, which include procedures of aluminum alloy surface treatment involving the removal of corrosion products. __________ Translated from Zashchita Metallov, Vol. 41, No. 5, 2005, pp. 479–484. Original Russian Text Copyright ? 2005 by Gerasimenko, Yampol'skaya.     

Acid equilibrium during bioleaching of alkaline low-grade sulfide copper ore

This article reports the study on acid equilibrium during bioleaching of alkaline low-grade copper sulfide ore. Adding auxiliary agents 1# （sulfur） and 2# （pyrite） makes bacterial leaching of copper and acid production carried out simultaneously because the auxiliary agents can be oxidized by bacteria and the oxidation products involve acid. The acid required for dissolving alkaline gangue during bacterial leaching is produced, and acid equilibrium is reached during the ore bio-leaching. The recovery of copper reaches more than 95%.     

Korrosionsschäden an Bronzeplastiken

Corrosion damage of bronze sculptures In order to assess the effect of contaminated air (industrial and urban atmospheres) on bronze sculptures the composition of the base metal and of the corrosion products has been investigated pn a number of sculptures in the open air. in addition to the corrosion products typical of bronze — basic copper sulfate, basic copper nitrate, basic copper chloride stannous acid, lead sulfate — other compounds have been found which — as e.g. gypsum — are formed by reaction between dust and atmospheric contaminats. The corrosion layers usually include several strata; soot containing strata are characteristic of the winter season. Oils, waxes and plastic coating are suitable agents for protecting bronze sculptures against corrosion. The two first mentioned materials are suitable in particular for older bronzes having a natural or artificial patina; they require, however, renewal after regular intervals; plastic coatings are suitable for application to bright metal surfaces and are more durable. Despite the high manpower requirement it is advisable regularly to clean the sculptures with detergent containing water.     

Decision Making and Institutional Design for Product Lifecycle Management

This paper proposes a new approach to decision making and institutional design for product lifecycle management based on social systems engineering. Product lifecycle problems are limited not only by technological issues, but also by economic and social issues. We construct an agent-based model of decision making systems consisting of human subjects such as producers, consumers, dismantlers and used-unit dealers. The focal point of this study is the analysis of which economic agents should collect used units and how product durability affects the formation of a recycling society. This paper also presents discussion of institutional design by comparing experimental results with current institutions using real-world data for several types of products.     

Ca（OH）2悬浊液非均相沉淀中磷酸系控制剂对文石生长的影响

在磷酸系晶型控制剂的作用下,通过氢氧化钙悬浊液的非均相沉淀法合成了文石型晶须,研究了在此方法中晶型控制剂、温度以及初始ｐＨ值等工艺因素对文石生长的影响规律。利用粉末Ｘ射线衍射分析了所合成样品中文石的含量,同时用扫描电镜（ＳＥＭ）观察了合成晶须的形貌状态。经过实验发现,当在氢氧化钙悬浊液中添加磷酸系晶型控制剂后,体系具有类似的碳酸化过程,但是当采用磷酸或酸性的磷酸盐作为控制剂时,作用要优于碱性磷酸盐,所获得的样品中文石的含量明显较高。适合于文石生长的温度范围为２９８Ｋ～３４８Ｋ,初始酸度值范围为８．６～１２．４。通过研究镁离子与磷酸根离子对文石生长的协同作用后发现,镁离子对文石晶体的生长作用明显优于磷酸根,当它们同时存在于溶液中时,镁离子的作用可以掩盖磷酸根离子的作用。