表面涂覆氮化铝粉末的抗水化性

研究了表面涂覆硬脂酸和吐温80对氮化铝粉末抗水化性能的影响。经过表面改性工艺处理的氮化铝粉末在20～60℃具有很好的化学稳定性,溶液pH值在9.88基本保持不变;改性处理的氮化铝粉末在水中长时间浸泡,X射线衍射分析表明其物相为AlN相。通过表面改性工艺在氮化铝粉末表面包裹一层有机化合物,能有效地抑制氮化铝与水的反应,阻碍水分子向氮化铝粉末表面侵蚀,提高氮化铝粉末在潮湿环境的抗水化能力。     

低表面能粉末填充复合聚甲基丙烯酸丁酯,醇酸树脂

以低表面能粉末辐照聚四氟乙烯、氟化碳酸盐填充复合到聚甲基丙烯酸丁酯、醇酸树脂中,探讨了粉末体积浓度对复合涂层的机械性能和表面能的影响。     

微波辐射对硫酸钙粉末表面能影响的研究

为了探索微波对固态物质表面的影响作用,并对化工表面过程引入微波强化提供依据,根据Washburn浸溃理论和Owens-Wendt-Kaelble法及薄板毛细渗透技术,采用了多种有机物作为液体探针,测定了微波辐射下硫酸钙粉末的接触角变化和表面自由能.测定结果显示微波辐射后硫酸钙粉末的表面自由能得到提高,从39.6mJ·-2增加到41.8mJ·m-2,其主要原因是使硫酸钙表面能的极性成分得到了较大的提高.这一结果归于微波幅射引起晶粒表面的电荷重排,与晶粒表面能带分裂引起的电子跃迁理论是相吻合的.     

CaCO3粉末表面处理进展

综述了CaCO_3粉末表面处理进展,着重讨论了CaCO_3粉末表面处理的方法、机理等。     

碳酸钙粉末表面处理的研究进展

本文综述了ＣａＣＯ３粉末表面处理的研究进展，介绍了ＣａＣＯ３-粉末表面处理的方法及机理。     

碳酸钙表面改性技术进展

本文综述了CaCO3粉末表面处理研究进展，介绍几种CaCO3粉末表面处理的方法、处理及应用。     

胶乳制品表面的氯化处理

在某些用途中,浸渍胶乳制品必需具有光滑的表面。例如家用橡胶手套应带脱方便。表面粘附虽能通过搽抹干粉(干滑石粉)来解决但这种粉末在实际使用时会脱落或洗掉,要使胶乳制品表面得到更加持久的光滑性可以将其放入溶解了游离卤素通常是氯)的液槽中浸渍亦即对制品表面进行卤化处理。     

碳酸钙粉末的表面改性

综述了近年来碳酸钙表面改性技术的新进展，并介绍了各种表面改性方法如偶联剂、有机物与无机物表面处理碳酸钙粉末及其机理。     

碳酸钙粉末的表面改性与应用

综述了CaCO_3粉末表面改性的机理和方法,介绍了经过不同改性剂改性的CaCO_3粉末在实际中的运用.     

复合涂层的表面能和机械性能研究

通过对环氧、有机硅改性环氧树脂和聚氨酯、有机硅改性聚氨酯树脂与低表面能填料聚四氟乙烯及氟化碳酸盐粉末的复合，探讨了填料体积浓度对涂层表面能以及机械性能的影响。发现基料与填料同时具有较低表面能，尤其是基料具有很低表面能时，它们复合得到的涂层由于相界面间的相互作用较差，不能形成良好的机械性能。而活性基团的树脂，其与填料间的相界面处产生牢固结合，在填料体积浓度达到临界颜料体积浓度时，复合涂层具有较低的表面能和良好的机械性能。     

Role of fluorocarbon surfactant in the preparation of polytetrafluoroethylene‐modified polyacrylate emulsion

Role of fluorocarbon surfactant in the preparation of polytetrafluoroethylene‐modified polyacrylate emulsion is investigated. The fluorocarbon surfactant has an efficient preemulsification to polytetrafluoroethylene (PTFE) powder. It enables PTFE powder to be introduced into the copolymer of n‐butyl acrylate, n‐methyl methacrylate, n‐styrene, and α‐methacrylic acid. Thereby, stable PTFE‐modified polyacrylate emulsion can be formed. The effects of fluorocarbon surfactant on the surface tension, particle size and particle size distribution of the emulsion, as well as the relation between fluorocarbon surfactant and the amount of PTFE powder are fully investigated. The particle size and the surface tension of emulsion strongly depend on the fluorocarbon surfactant concentration in the reaction system. The particle size distribution becomes narrower and the stability of the emulsion is improved with the increasing of the fluorocarbon surfactant concentration. According to the experiments, a possible mechanism of fluorocarbon surfactant in polymerization is proposed. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007     

国内外氟碳粉末涂料的开发现状与发展趋势

论述了国内外氟碳粉末树脂及涂料的开发现状,重点介绍热固性氟碳粉末树脂和涂料,比较了热塑性氟碳粉末涂料和热固性氟碳粉末涂料的性能及应用领域,指出今后氟碳粉末涂料的发展方向。     

聚酯粉末涂料的耐久性评价及其性能改进

介绍了通过佛罗里达曝晒试验评价各类聚酯粉末涂料的耐久性。采用十二氟庚烷基长链氟碳烷基的聚酯树脂粉末涂料,较大改善涂膜表面疏水性和疏油性,为改进聚酯粉末涂料耐久性作了有益的探索。     

建筑铝型材用氟碳粉末涂料的制备与性能研究

为了开发出适用性好、性价比高的建筑铝型材用FEVE(氟烯烃-乙烯基醚共聚物)型氟碳粉末涂料,重点分析了不同厂家的氟树脂、不同种类异氰酸酯及颜填料的含量对FEVE型氟碳涂层性能的影响。对比了不同类型耐候性粉末涂料的耐老化性,认为丙烯酸树脂和超耐候羟基树脂比较适合改性氟树脂;进一步对比了这2类树脂改性氟树脂后涂层的性能。结果表明:选用丙烯酸树脂改性氟树脂与自封闭异氰酸酯BF-1540制备FEVE氟碳粉末涂料,颜填料用量为22.5%时所得涂层性能优异,性价比高。     

甲基含氢硅油对喷雾干燥磷铵灭火粉性能的影响

采用喷雾干燥法制备了球形空心超细NH4H2PO4灭火粉,并添加甲基含氢硅油乳液、氟碳表面活性剂FK-510对粉体进行原位改性,研究了表面活性剂甲基含氢硅油对NH4H2PO4灭火粉的疏水性、表面元素、表面形貌、分散性及粒度分布的影响. 结果表明,干燥过程中甲基含氢硅油及FK-510迁移聚集于颗粒表面,且FK-510位于最外层而甲基含氢硅油位于次外层,明显提高灭火粉疏水性;添加甲基含氢硅油明显改善了粉体分散性,当硅油添加量为NH4H2PO4质量的3%时,所得产品疏水性、分散性和球形度良好,活化指数提高到93.7%.     

New approaches to the processing of rutile-filled polyolefins

The performance of a fluorocarbon elastomer processing additive in rutile-filled linear low density polyethylene (LLDPE) compounds was evaluated by capillary rheometry, and blown film extrusion. Different compounding sequences were considered and their effects on the performance of the processing additive in the presence of various rutiles examined. Lower apparent melt viscosities and higher shear rates for the onset of melt fracture were observed when using certain surface treated rutiles. The nature of the surface coating applied to rutiles was found to have a great influence on the Theological properties of the filled compounds and on the dispersibility of the solids. The acid-base characteristics of rutiles were determined by inverse gas chromatography techniques, and inherent agglomeration indexes for the pigments were measured by an application of powder rheology principles. It was found that those rutiles with high agglomeration indexes or those with highly basic surfaces interfered the most with the processing additive. Mechanisms by which rutile dispersibility and acid-base character influence the effectiveness of the fluorocarbon elastomer processing additive are discussed.     

热固性氟碳粉末涂料的储存稳定性影响因素探讨

简要介绍了影响热固性氟碳粉末涂料储存稳定性的几个方面的因素以及如何改善热固性氟碳粉末涂料储存稳定性的途径,提高涂料生产以及涂装性能。     

三氟氯乙烯-乙烯氟碳粉末涂料及其在化工重防腐领域中的应用

检测了三氟氯乙烯-乙烯(ECTFE)共聚物氟碳粉末涂料理化性能,与其他热塑性氟碳粉末涂料作了各种性能比较,介绍了其在化工重防腐蚀领域中的应用。     

The Impact of In‐situ Fabric Surface Energy on Dehydration of Fabrics

Reducing liquid surface tension is widely used to increase the efficiency of the centrifugal dehydration in textile wet processing. However, increasing the dehydration efficiency by decreasing fabric surface energy is seldom studied. In this work, the impact of in situ fabric surface energy on residual moisture content (RMC) of fabrics in the dehydration processes was investigated. Different types of fluorocarbon surfactants including cationic, anionic, nonionic and amphoteric were adopted as additives in this study. The liquid surface tension and RMC were efficiently decreased when fluorocarbon surfactants were used. Notably, a cationic fluorocarbon surfactant displays similar surface tension but distinct dehydration efficiency. The in situ fabric surface energy was evaluated by measuring the n‐octane contact angle on the cotton fabric surface under the surfactant solution using the captive bubble method. It was found that the cationic fluorocarbon surfactant system gave the lowest fabric surface energy, which was probably because cationic fluorocarbon surfactants are easier to adsorb onto the surface of cotton fabric to form a fluorocarbon layer. The chemical composition (¹⁹F, ¹²C and ¹⁶O) analysis of the cotton fabric surface by X‐ray photoelectron spectroscopy confirms the hypothesis.     

三氟氯乙烯-乙烯基醚为基体热固性氟粉末涂料的研制

介绍了以三氟氯乙烯-乙烯基醚为基体的热固性氟粉末涂料的研制过程，讨论了在涂料配方设计中选择固化剂和固化反应催化剂、耐冲击剂、消泡剂、流平剂等助剂时容易出现的问题与解决方法，检测了制备的热固性氟粉末涂料的各项理化性能。