高性价比氟涂料的研究

为了开发一种性价比高的含氟涂料,通过分子设计合成了一种常温固化低氟树脂,用XPS(X射线光电子仪)检测了树脂成膜后含氟成分的分布情况,测量了涂膜与纯水的接触角,把树脂分离提纯除去含氟均聚物和未反应氟单体后,测量了聚合物的红外光谱图,因而推断了合成树脂的分子结构.应用合成树脂制作了一种含氟涂料,并检测了色漆涂膜耐蚀、耐候、耐盐雾等性能.试验结果表明:通过分子设计合成的氟树脂成膜时产生了较大趋向作用,含氟基团向空气/聚合物界面伸展,对聚合物内部分子形成很好的保护作用;低氟树脂涂料具有优异的耐候性能和耐蚀性能;研制的涂料具有性价比高的特点.     

产业投资

精品项目推介一、项目简介BW95系列涂料是以具有优异耐蚀、耐候及力学性能的水性共聚物(BW)为基料,以功能性金属粉末为主要填料的单组分、高性能的“绿色”防腐蚀涂料,该涂料具有如下特性:*无有机溶剂挥发、无味、无毒、无污染,适应环保要求;*单组分,无使用时间的限制及混合的麻烦;*室温干燥迅速,施工工期短;*涂膜坚韧、附着力强、抗冲击;*涂膜光滑、具有良好的金属光泽;*具有优异的耐湿热、耐盐雾、耐水、耐油等耐蚀性能;*耐候性好;*可喷涂、刷涂,施工方便;*中低价位、高性能。BW95系列涂料的生产设备简单,只需一般涂料生产所用的研磨、…     

光学组件用消光涂料的研制

以氟碳树脂与支化型固化剂作为树脂体系,制备了可用于光学组件的消光涂料,其具有附着力高、柔韧性好等力学性能,同时具有易清洗、耐溶剂、耐候耐蚀等特点,可长效保护光学组件,对340~1900nm波长的光吸收率在99%以上。     

钢结构防护用氟碳涂料的应用

氟碳涂料性能优越,已逐渐取代其他防腐涂料,在钢结构、桥梁等工程中广泛应用,具有优异的长效防腐性和耐候性.此文介绍了氟碳涂料防腐体系的施工工艺及应用.     

BW95 列工业用涂料

BW95系列涂料是以具有优异耐蚀、耐候及力学性能的水性共聚物(BW）为基料，以功能性金属粉末为主要填料的单组分、高性能的“绿色”防腐蚀涂料，该涂料具有如下特性：无有机溶剂挥发、无味、无毒、无污染，适应环保要求；单组分，无使用时间的限制及混合的麻烦；室温干燥迅速，施工工期短；     

高耐候太阳热反射涂料的制备

采用UVPC系统分析了多种颜料的可见光-近红外漫反射特性,并选取高反射颜料以及氟碳树脂制备涂料,研究了涂料的常规性能和太阳热反射比.测试结果表明,涂膜具有长效降温节能效果,且颜色丰富可调,可应对多领域的不同颜色及耐候要求.     

国外有机硅树脂及其耐热涂料进展

有机硅涂料是有机硅产品的一个重要部分,它在耐热、耐候、电绝缘等方面具有优异的性能。在耐热涂料中有机硅耐热涂料也是应用最广泛的一种。下面对有机硅漆及其耐热涂料的国外情况作一些介绍以供参考。     

新型氟树脂

氟树脂具有优异的耐热性、耐药品性、高绝缘性、低介电常数、非粘性、低摩擦系数等性能,已开发生产的氟树脂品种繁多。近年来日本旭硝子公司在此基础上又开发了具有新的功能用途的透明性氟树脂和耐候涂料用氟树脂,本文将予以概要介绍。     

不同紫外光固化涂料的涂膜性能研究

通过不同齐聚物、单体稀释剂、引发剂、促进剂的组合得到不同的紫外光(UV)固化涂料,研究了UV涂料的附着性、光泽、柔韧性、耐溶剂性,以及在不同材质表面的涂膜性能。通过实验可以看出:环氧丙烯酸酯齐聚物具有良好的附着力、颜料润湿性、高光泽、高硬度与优异的耐溶解性;聚氨酯丙烯酸酯齐聚物具有反应活性高、固化速度快、优异的耐黄变性能、优异的附着力、柔韧性、抗化学品性和耐磨性;聚酯丙烯酸酯齐聚物具有良好的光泽、耐候性能、固化性能和保光性能较好。将以上三者按不同比例搭配使用,配合相应的组成成分,可灵活地设计出具有实用价值的紫外光固化涂料产品。     

新型纳米TiO2自清洁氟碳涂料的性能研究

研究了纳米TiO2在涂料中的光催化性能,及其使氟碳涂料(PVDF)产生的自清洁作用.从物理机械分散和表面改性两个方面,分别讨论了纳米TiO2在氟碳涂料中分散性的影响因素.结果表明,加入371A、Tween-80及Tritonx-100等分散剂,以转速6 000 r/rain机械分散45 rain,超声分散60 rain,可以提高纳米TiO2在氟碳涂料中的分散性,且纳米TiO2在氟碳涂料中具有优良的自清洁作用.     

Photocatalytic activity and stability of TiO2/ZnAl layered double hydroxide based coatings on mortar substrates

The surface properties and photocatalytic activity of the cement and pozzolanic mortar samples coated with TiO₂/ZnAl layered double hydroxides were studied with the intention to design suitable protective, hydrophilic coatings. In order to underline the existing correlation between the water uptake characteristics and the surface features, the coated mortars were subjected to water absorption test by capillarity, to photo-induced surface water absorption test and to photo-induced hydrophilicity test by contact angle measurements. The self-cleaning behavior of the mortar systems was evaluated by monitoring the photocatalytic rhodamine B removal efficiency in correlation with the development of photo-induced surface hydrophilicity. The coating durability was assessed towards the weathering effect of rain (essential for the coating self-cleaning properties). The positive result of the coating deposition was the improvement of photocatalytic activity, photo-induced hydrophilicity and the decrease of mortar systems surface roughness. The study revealed that the developed coating promotes self-cleaning effect.     

Tunable wettability on Pendelic marble: could an inorganic marble surface behave as a “self-cleaning” biological surface?

The sustainable protection of the Greek cultural heritage aims to strengthen Pendelic marble, to preserve its unique esthetic properties and its resistance to long weathering. Our main purpose was to design, apply, and study a system of controllable wettability appropriate to the hydrophilic nature of the surface of Pendelic marble. A very simple, cost effective, and easily reproducible method has been developed, to fabricate a composite protective hybrid nanostructured film via a bio-mimetic route. This is a modern technological method for self-cleaning surfaces mimicking nature’s phenomena and structures, such as the Lotus leaf hierarchical nano/microstructure. Our approach differs from the conventional conservation methods in that it is based on a top coating with nanostructured synthesis, consisting of a hydrophilic/hydrophobic silica mixture dispersed in organic solvents, applied by “alla prima” technique onto a fluorosilanic base matrix that has been coated onto Pendelic marble. The behavior of this new surface is critically examined in this document.     

Using Field Measurements to Assess Aging of Self-Cleaning High-Reflectance Paint

Continuous field measurements were used to evaluate the aging of solar reflectance on self-cleaning coatings for roofs in comparison with conventional coatings that have no self-cleaning function. Solar reflectance on self-cleaning coatings decreases by about 6 % per year with annual variations, due to the adhesion of dirt. On the other hand, solar reflectance on conventional coatings greatly decreases, by approximately 18 % within four months of the coating’s application, due to the adhesion of dirt. Then, it gradually recovers at a rate of about 4 % per year, with annual variations, due to degradation of the coating. It is due to degradation of the conventional coating that the difference of solar reflectance between the self-cleaning coating and the conventional coating becomes almost zero in two years. Both the adhesion of dirt and coating degradation by chalking affect the temporal change of solar reflectance with annual variation.     

纳米复合氟改性丙烯酸树脂超疏水自清洁涂层的制备

用自由基共聚法制备氟改性丙烯酸树脂的无规共聚物并对其进行了表征,研究了合成工艺条件对涂层表面疏水性的影响。结果表明,采用粒子填充法将纳米SiO2、TiO2与氟改性丙烯酸树脂共混后制备的超疏水自清洁涂层,水在其表面的接触角达160℃以上,滚动角小于5℃,具有超疏水性。涂层对其表层覆盖的污物具有一定的自清洁作用。扫描电子显...     

超疏水、自清洁涂层对建筑墙体的防护

随着工业水平的快速提高,我国的空气污染日益严重。建筑物外墙常年暴露在空气中,外观污染严重,而且附着于其表面的各类污染物难以清除。因此,建筑墙体的防护措施已经成为研究的热点。本文中,以聚二甲基硅氧烷（PDMS）和疏水SiO₂为基本原料,制备了可用于建筑墙体防护的自清洁涂层。将配制好的涂层喷涂在建筑墙体上,通过室温固化,便可形成具有自洁净效果的涂层。本文通过分析涂层材料与建筑墙体结合机制,说明涂层与墙体具有较强的黏附作用。由于涂层具有的超疏水特性,附着在其表面的颗粒及液体污染物很容易通过水流清洗干净。此外,实验还表明：该涂层在5个月户外环境下,其自清洁效果无显著的变化。     

Preparation of stable ultrahydrophobic and superoleophobic silica-based coating

Silica-Based coatings having excellent water- and oil-repellent properties and good weathering stability have been deposited onto glass surface by a simple one-step dip coating technique. To achieve ultra water repellency and super oil repellency, the chemical composition of SiO2 nanoparticle employed as surface roughness enhancer and trichloro(1H,1H,2H,2H-perfluorooctyl)silane employed as surface-energy reducing substance was varied. At the optimum synthesis condition, the coating exhibited very high contact angles of 173.2, 146.7 and 147.6 degrees for water, ethylene glycol and seed oil, respectively. The achievement of excellent water- and oil-repellency is also described based on the presence of air trapped in micropore of the coating in addition to its high surface roughness and low surface free energy. The coatings have good weathering stability based on natural and accelerated weathering tests indicating feasibility for practical use.     

近红外反射超疏水黄色涂层的制备和性能

将钛铬棕粉末(TCB)、金红石型二氧化钛(TiO₂)、疏水纳米二氧化硅(SiO₂)与聚二甲基硅氧烷(PDMS)溶液混合,一步刷涂制备出超疏水黄色涂层,系统地研究了涂层的表面润湿性、疏水稳定性、耐紫外线老化性能、自清洁性能、以及近红外反射性能。结果表明,这种涂层的水接触角(CA)和滚动角(SA)分别为155.2°和5.4°;涂层在1.0 kPa的压力下经过2 m距离的砂纸磨损后和5 L的水流冲击后依然保持优异的疏水性,其附着力和硬度分别达到2级和6B等级;不同pH值的溶液在涂层表面都具有超疏水效果并具有化学稳定性;用紫外线照射240 h后涂层表面仍然保持极强的疏水性,表明其具有耐紫外线老化性能;涂层表面具有优异的自清洁性能,污染物极易地被水滴带走;涂层的近红外反射率和太阳反射率分别达到0.858和0.672,对普通水泥板具有明显的降温效果,在户外暴露和水流冲击后仍保持较高的反射率。     

无氢DLC涂层的摩擦学性能

为了探究轮胎模具无氢类金刚石(DLC)涂层的摩擦学特性,增强轮胎模具的易脱模、防粘、自清洁性能以及提高轮胎质量与服役寿命,以轮胎模具常用的35钢为基体,利用电弧离子镀在基体试样上制备无氢DLC涂层,对涂层Raman光谱、表面粗糙度、表面微观形貌、纳米硬度、结合力和摩擦系数进行了分析,着重研究涂层摩擦前后表面微观形貌的变化以及摩擦磨损机理。结果表明:通过改变表面粗糙度可以有效降低涂层的摩擦系数,涂层摩擦系数随粗糙度减小而显著降低;在140℃高温条件下,摩擦系数最小低至0.363 4,且涂层纳米硬度可达32.45 GPa,弹性模量高达348.94 GPa。无氢DLC涂层完全满足轮胎模具减摩耐磨和自清洁性的使用要求,为制造高性能轮胎模具提供了一种可行的工艺选择。     

智能涂层--类生物表面活性智能涂层

智能涂层是一种人造的、能够对某一外部刺激,如:温度、应力、应变或环境等有选择提供(作出)最佳反应的新型涂层系统.介绍了智能涂层的概念、范畴、特点和国内外研究动态.对自清洁、减流阻、抗菌除污智能涂层的原理和研究成果进行了分析和评述.     

Wetting behavior of oleophobic polymer coatings synthesized from fluorosurfactant-macromers

Architecturally similar monomers were copolymerized with a water-oil discriminate fluorosurfactant to create hydrophilic-oleophobic coatings. Acrylic acid, hydroxyethyl methacrylate, and methyl methacrylate were used as comonomers with the fluorosurfactant macromer. The homopolymers of the selected comonomers are water-soluble, water-swellable, and water-insoluble, respectively, thus coupling the surfactant monomer in varying concentration within polymers of varying hydrophilicity. Wetting behavior of water and hexadecane were examined as a function of copolymer composition, thus revealing critical structure-property relationships for the surfactant-based system. Acrylic acid copolymers and hydroxyethyl methacrylate copolymers both exhibited a hexadecane contact angle which exceeded the water contact angle. This condition predicted an ability to "self-clean" oil-based foulants. The most oleophobic of the self-cleaning copolymers had an advancing hexadecane contact angle of 73° and an advancing water contact angle of 40°. It was determined that the advancing and receding water and hexadecane contact angle response varies montonically for each copolymer type as the surface concentration of the surfactant is varied. Comparing between copolymer types revealed large differences in wetting response. Methyl methacrylate copolymers with 2.8 mol % surfactant had advancing water contact angle 82° and advancing hexadecane contact angle 26°, which is neither oleophobic nor self-cleaning. In contrast, acrylic acid copolymers with 3.1 mol % surfactant had advancing water contact angle of 44° and advancing hexadecane contact angle of 52°, creating a self-cleaning coating. Thus, the nature of the comonomer exerts a greater influence than the surfactant content on the wetting behavior and self-cleaning ability of the final coating.