水包水型多彩花纹涂料

就水包水型多彩花纹涂料的形成机理、材料选择、配方组成、生产工艺控制分别进行了论述。探索了施工方法。     

纳米TiO2的分散及在水性涂料中的应用研究

研究了各因素对纳米TiO2水悬浮液稳定性的影响,通过正交试验筛选出了最佳的分散工艺,解决了纳米TiO2在水性介质中的团聚问题.将分散后的纳米TiO2浆料加入到普通的水性苯丙乳液涂料中,加入各种助剂配制出了性能优异的水性纳米TiO2涂料,并对涂料的性能进行了测试.     

碳纳米管在环氧树脂乙醇溶液中的分散性研究

采取硝酸-盐酸回流法对碳纳米管进行纯化,以超声振荡为手段,探究了在乙醇溶液中表面活性剂种类、浓度、复配方法及超声振荡时间等因素对碳纳米管在环氧树脂基体中的分散性能的影响。通过碳纳米管环氧树脂悬浮液的稳定保存时间来观察其分散性能。结果表明,阴离子型表面活性剂十二烷基苯磺酸钠(SDBS)分散效果最好。     

均匀剂H40MSF在半钢子午线轮胎气密层胶中的应用

研究均匀剂H40MSF在半钢子午线轮胎气密层胶中的应用.结果表明：以均匀剂H40MSF等量替代均匀剂40MSF用于气密层胶中,胶料的混炼能耗降低,生产效率提高;胶料的硫化特性、炭黑分散性以及硫化胶的物理性能相差不大;成品轮胎的耐久性能和高速性能提高.     

不同颗粒尺寸α-Al2O3粉体制备稳定浆料的研究

通过改变pH值和分散剂的浓度 ,对不同颗粒尺寸的αAl2 O3粉体制得浆料的稳定性、分散性以及流变特性进行研究。结果表明 :pH值和分散剂用量对αAl2 O3浆料的稳定性和分散性有显著影响。用不同颗粒尺寸的αAl2 O3粉体制备高稳定、高分散的陶瓷浆料 ,其最适pH值和最佳分散剂用量各不相同。αAl2 O3浆料的流变特性呈剪切稀化特点 ,悬浮浆料的粘度随固含量的增加而上升 ,而最佳分散剂用量不随浆料固含量的变化而改变     

氧化锆纤维增强超薄陶瓷板的制备及力学性能研究

建筑陶瓷薄板作为一种轻薄、低能耗的家装产品而逐渐成为市场的发展潮流,如何进一步对其实现减薄和增强也成为研究的热点。本文以建筑陶瓷高铝粉料为基体,设计二次球磨法并引入长径比为70~82的氧化锆纤维作为增强相,借助KH570表面改性剂改善纤维/基体(F/M)的界面结合,制备了氧化锆纤维增强超薄陶瓷板。研究表明,采用二次球磨工艺可以有效实现纤维在基体中的分散,当氧化锆纤维的掺杂量为3%(质量分数)时,超薄陶瓷板的弯曲强度可达到106.4 MPa,相较于空白样(96.8 MPa)提升了9.92%。在高温固相反应中,陶瓷熔融相的Na⁺、K⁺对氧化锆晶格的渗透作用会引起四方晶系氧化锆相向锆英石相的转变,四方晶系氧化锆相内部存在微裂纹拓展、颗粒弥漫增强、“纤维桥联-断裂拔出”等多种良性增强机制。     

Preparation of hydroxyapatite/poly(vinyl alcohol) composite film with uniformly dispersed hydroxyapatite particles using citric acid

Biocompatible hydroxyapatite (HA)/poly(vinyl alcohol) (PVA) composites and their transparent films were prepared by the coprecipitation and solvent casting method. The formation of HA in PVA composite powder was confirmed by the characteristic phosphate bands at 1100–1032 and 565 cm^?1 at FT‐IR spectra, and the weight ratio of HA to PVA was 50/50 examined by TGA. The crystal melting temperature of HA/PVA decreased compared with that of pure PVA. HA/PVA (50/50) composite powder and pure PVA were dissolved in dimethyl sulfoxide to obtain a film with HA/PVA weight ratio of 10/90. To improve HA particles' dispersity, which is one of the major factors affecting the mechanical properties of composite materials, various contents of citric acid were used for the preparation of HA/PVA films. At a citric acid concentration of 5 wt %, HA/PVA film with good dispersity of HA particles was obtained. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

Stabilized dispersion of nano-ceramic coating

1　INTRODUCTIONFormanyapplicationsinceramiccoatingsitisdesirabletosinteratrelativelylowtemperature .Onemethodbywhichthisgoalcanbeaccomplishedwasusingsubmicrometer particles,suchasnano parti cles .Buttheagglomerationcausedbythehighsur faceenergyofthenano particlesmadeitimpossibletoshowtheadvantageofthem ,sohomodispersedcoat ingisnecessary .Ontheotherhand ,inordertoachieveacoatingwithuniformthickness,itwasalsoadvantageoustousehomodispersedcolloidalsuspen sions[14 ] .Ingeneral,suspensionscan…     

纳米材料在润滑油中的分散性和稳定性

主要论述了目前解决纳米材料在润滑油中的分散性和稳定性的方法。     

Dispersity in polymer science (IUPAC Recommendation 2009)

This recommendation defines just three terms, viz., 1. molar‐mass dispersity, relative‐molecular‐mass dispersity, or molecular‐weight dispersity, 2. degree‐of‐polymerization dispersity, and 3. dispersity. “Dispersity” is a new word, coined to replace the misleading, but widely used term “polydispersity index” for M?_w/M?_n and X?_w/X?_n. The document, although brief, also has a broader significance in that it seeks to put the terminology describing dispersions of distributions of properties of polymeric (and non‐polymeric) materials on an unambiguous and justifiable footing. Copyright © 2009 Society of Chemical Industry