建筑外墙复合型质感涂料的制备与应用

以改性硅丙乳液复合部分弹性乳液为基料,天然石英砂为主要填料,辅以纳米二氧化硅、纳米抗污助剂、空心玻璃微珠、反射隔热粉、多功能助剂等制成建筑外墙复合型质感涂料,其具有抗污、耐候、超耐久及反射与阻热等性能,外观上形象逼真、高贵质感、色彩丰富,施工简便,是一种新型多功能、高性能、高装饰性建筑外墙涂料。     

高PVC刮涂外墙质感涂料的探讨

通过试验,对影响高PVC刮涂质感涂料的贮存稳定性、施工性等性能的各种因素进行分析及探讨研究.     

一种特殊纹理效果粉末涂料的研制及稳定性探讨

通过一次挤出工艺,制备了一种特殊纹理效果粉末涂料(新型雪花纹).探讨了环氧树脂、环氧树脂固化剂、催化剂、颜填料含量及挤出机进料温度和出料温度对雪花纹纹路产生的影响.结果 表明:环氧当量小的环氧树脂制备的粉末涂料,其环氧基含量高,反应速度快,反应程度更完全,得到的纹理最清晰;加入2-甲基咪唑固化剂可以提高涂膜的物理性能....     

Monazite Coatings on Fibers: II, Coating without Strength Degradation

Washed and unwashed rhabdophane (LaPO₄· x H₂O) sols were used to apply monazite coatings to 3M Nextel 720 and 610 fibers. This precursor was designed to minimize stress corrosion from gaseous decomposition products at high temperature. The coatings were heat-treated in-line at 900°–1300°C, in air, using a continuous vertical coater with immiscible liquid displacement. Coatings were characterized by optical microscopy, scanning electron microscopy, and transmission electron microscopy. The sol was characterized with light-scattering and zeta-potential measurements. Precursor phase evolution was studied with differential thermal analysis/thermogravimetric analysis and X-ray diffractometry. The washed sol had a higher pH and lower weight loss than the unwashed sol. The as-coated fibers were tensile tested, along with coated fibers heat-treated in air at 1200°C for 100 h. The precursor was slightly phosphate-rich, and this excess phosphate reacted with alumina in the fiber to occasionally make very small (<10 nm) pockets of AlPO₄ at the coating–fiber interface after 100 h at 1200°C. Both washed and unwashed sols made coated fibers with higher tensile strengths than those of coated fibers made from other precursors, and the washed sol may actually have slightly increased fiber strength when in-line heat treatments at <1200°C were used. A small amount of AlPO₄ may also have helped seal preexisting flaws. Degradation mechanisms during fiber coating are discussed in this paper.     

Effectiveness of Monazite Coatings in Oxide/Oxide Composites after Long-Term Exposure at High Temperature

The effectiveness of monazite (LaPO₄) in providing an oxidation-resistant weak fiber/matrix interface was evaluated in a fiber roving/thin coating/ceramic-matrix composite with >20% fiber volume fraction. Nextel™ 610/monazite/alumina composites were fabricated and tensile tested after isothermal exposures of up to 1000 h. Some strength loss was seen after short-term exposures (1100°–1200°C/5–250 h); however, no further loss was observed after 1000 h at 1200°C. Conversely, control samples containing uncoated fiber displayed >70% strength losses after only 5 h at 1200°C. Fiber pullout was seen in monazite-containing samples even after 1000 h at 1200°C. Debonding was predominantly in the coating or at either the fiber/coating or coating/matrix interface. Push-out testing confirmed the weakness of the monazite coating interface.     

Monazite Coatings on Fibers: I, Effect of Temperature and Alumina Doping on Coated-Fiber Tensile Strength

Monazite was continuously coated onto Nextel 720 fibers, using an aqueous precursor and in-line heat treatment at 900°–1300°C. Some experiments were repeated with alumina-doped precursors. Coated fibers were heat-treated for 100 h at 1200°C. Coatings were characterized by optical microscopy, scanning electron microscopy, and analytical transmission electron microscopy. Coated-fiber tensile strengths were measured by single-filament tensile tests. The precursors were characterized by X-ray diffractometry, differential thermal analysis/thermogravimetric analysis, and mass spectrometry. Coated-fiber tensile strength was lower for fibers coated at higher deposition temperatures. Heat treatment for 100 h at 1200°C decreased tensile strength further. The coatings were slightly phosphate-rich and enhanced alumina grain growth at the fiber surface, but phosphorus was not detected along the alumina grain boundaries. Fibers with alumina-doped coatings had higher tensile strengths than those with undoped coatings after heat treatment for 100 h at 1200°C. Alumina added as α-alumina particles gave higher strengths than alumina added as colloidal boehmite. Alumina doping slowed monazite grain growth and formed rough fiber–coating interfaces after 100 h of heat treatment at 1200°C. Possible relationships among precursor characteristics, coating and fiber microstructure development, and strength-degradation mechanisms are discussed in this paper.     

导电型粉末涂料原理及进展

本文介绍导电型粉末涂料的分类，就粉末涂料导电原理引用一些理论来解释，给出了一个目前常用的参考配方。     

金属闪光涂料逐鹿汽车涂装市场

介绍了汽车用闪光涂料的施工工艺、装饰效果和市场发展。     

脉冲电沉积纳米晶镍镀层的织构与硬度

采用脉冲电沉积方法在304不锈钢表面制备出具有不同织构的纳米晶镍镀层。采用X射线衍射仪对镀镍层的结构进行了表征,并用超显微微米压痕仪测量了镀镍层的硬度。结果表明:随着电镀时间的延长,镀镍层的晶粒尺寸变化不大,约为(14±2)nm;择优晶面由(111)向(200)转变;硬度由6070 MPa降至3 750 MPa。织构的变化显著影响镀镍层的硬度,随着织构系数TC(111)的降低,镀镍层的硬度逐渐下降。     

涂料工业的世纪进展--绿色涂料

介绍了涂料工业的发展现状和常规溶剂型涂料的挥发性有机化合物 (VOC)对人类健康和生态环境的影响 ,着重讨论了绿色涂料的种类及其发展现状 ,指出以水性涂料、高固体份涂料、粉末涂料和辐射固化涂料为代表的绿色涂料是新世纪涂料工业发展的必然趋势     

环境友好型涂料研究进展

环境友好型涂料的基本要求是实现"绿色化"、高性能化和高功能化。阐述了高固体分涂料、辐射固化涂料、水性涂料和粉末涂料四类环境友好型涂料的研究进展,并展望了乳液涂料的发展趋势。     

无溶剂涂料

介绍了无溶剂涂料的主要种类、特点、用途及前景。     

新型涂料的研究进展

叙述了船舶用防污涂料、吸波涂料、纳米隐身涂料、汽车涂料、防滑涂料等新型涂料的种类、研究现状和发展趋势。     

Damage Evolution and Stress Analysis in Zirconia Thermal Barrier Coatings during Cyclic and Isothermal Oxidation

The failure mechanisms of air-plasma-sprayed ZrO₂ thermal barrier coatings with various microstructures were studied by microscopic techniques after thermal cycling. The elastic modulus ( E ) and hardness ( H ) of the coatings were measured as functions of the number of thermal cycles. Initially, both E and H increased by ∼60% with thermal cycling because of sintering effects. However, after ∼80 cycles (0.5 h at 980°C), the accumulated damage in the coatings led to a significant decrease of ∼20% of the maximum value in both E and H . These results were correlated with stresses measured by a spectroscopic technique to understand specific damage mechanisms. Stress measurement and analysis revealed that the stress distribution in the scale was a complex function of local interface geometry and damage in the top coat. Localized variations in geometry could lead to variations in measured hydrostatic stresses from −0.25 to −2.0 GPa in the oxide scale. Protrusions of the top ZrO₂ coat into the bond coat were localized areas of high stress concentration and acted as damage-nucleation sites during thermal and mechanical cycling. The net compressive hydrostatic stress in the oxide scale increased significantly as the scale spalled during thermal cycling.     

阴极电泳涂料的研究进展

介绍了电沉积的原理,阴极电泳涂料和树脂的特点以及阴极电泳涂料的优越性。概述了国内外阴极电泳涂料的现状,重点介绍了几类目前发展较快的阴极电泳涂料,同时指出了阴极电泳涂料今后的发展趋势。     

新型功能性涂料的研究进展

介绍了一些新型功能性涂料,如,耐指纹涂料、红外辐射节能涂料、防雾涂料、可剥离涂料、降解甲醛涂料等。并对这些涂料的制备和性能进行了综述。     

质感型水包水多彩涂料的彩粒稳定性研究

选用亲水性异氰酸酯作为固化剂,硅酸镁锂作为保护胶,以分散体型羟基丙烯酸树脂和聚丙烯酸弹性乳液复配得到分散相,利用硅酸镁锂层间可交换的阳离子与羟乙基纤维素中的羟基之间的“凝胶化”反应,同时辅以羟基丙烯酸树脂与亲水性固化剂的交联作用来制备综合性能优异的质感型水包水多彩涂料。实验结果表明：当乳液复配比在 1∶4且掺量为 30%,固化剂的—NCO与羟基树脂的—OH物质的量之比为 1∶2,高浓度保护胶溶液掺量为 4%时,所制备的彩粒具有强度适中、色彩饱满度高、抗渗色能力较强,施工喷涂顺畅、无流挂,体系贮存稳定等特点,解决了水包水多彩涂料在生产和施工过程中常常出现的彩粒渗色、彩粒易破碎、喷涂均匀性欠佳等问题。     

防黏涂料的研究进展

介绍了防黏涂料的组成、特点和功能。阐述了防黏涂料的制备方法和发展方向。     

Control of Interfacial Properties through Fiber Coatings: Monazite Coatings in Oxide–Oxide Composites

Fiber pushout tests were used to quantify the effects of fiber coating thickness on the mechanical properties of two model composite systems: a monazite-coated (LaPO₄-coated) alumina (Al₂O₃) fiber in an Al₂O₃ matrix and a LaPO₄-coated yttrium aluminum garnet (YAG) fiber in an Al₂O₃ matrix. Interface properties were quantified using the Liang and Hutchinson (LH) pushout model and mechanistically rationalized by considering the change in residual thermal stresses with changes in the coating thickness. Measures of the pure Mode II interfacial fracture energy, the coefficient of friction, and a radial clamping pressure are extracted by fitting the LH equations to the experimental results. Using the approach that has been developed herein, a methodology is available for measuring the interfacial properties, predicting the effect of coating thickness, and selecting the coating thickness to     

汽车涂料进展

分别从汽车涂料使用的底漆、中涂漆、面漆三方面综述了水性涂料、粉末涂料、高固体分涂料在汽车涂装体系中的应用。