共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
低表面能有机硅及其改性防污涂料的研究进展 总被引:1,自引:0,他引:1
概述了低表面能防污涂料的发展现状,有机硅低表面能防污涂料的影响因素及其防污机理、低表面能防污涂料的分类、有机硅改性低表面能防污涂料的研究状况。重点介绍了有机硅低表面能微结构构筑技术,提出了表面微结构构筑正在成为未来防污领域发展的重点,总结了低表面能防污涂料的不足,并展望了其发展趋势。 相似文献
3.
4.
采用接枝共聚的方法,即环氧和丙烯酸反应,环氧开环的同时生成带有羟基的丙烯酸单体,加入引发剂结合另外2种丙烯酸单体,在催化剂的作用下接入有机硅,制得有机硅环氧丙烯酸树脂。讨论了环氧树脂的用量对涂膜性能的影响、涂料的水解特性,并进行了实海挂板实验。结果表明:当环氧的用量为10%时,制备的防污涂料与水的接触角达到133°,附着力1级;有机硅/环氧改性丙烯酸树脂制得的防污涂料在海水中能够稳定地水解,兼具低表面能和自抛光的特性,实海挂板实验结果表明,涂料具有良好的防污性能。 相似文献
5.
介绍了低表面能防污涂料的作用机理、特点及发展现状,重点介绍了有机硅系列和氟化物系列低表面能防污涂料的研制和应用情况。 相似文献
6.
几种低表面能含硅(氟)涂料的性能 总被引:2,自引:0,他引:2
本文制备了几种新型的含硅或氟低表面能防污涂料包括溶剂型有机硅渗透反应型涂料、有机硅改性丙烯酸酯共聚物涂料和含氟共聚物低表面能涂料,从低表面能防污涂料的原理出发探讨了建材经含有机硅、氟溶剂型有机涂料的防水抗沾污能力的影响要素,研究了有机硅氟本身结构、含量、催化交联剂等对各种涂料的水接触角、吸水率、耐污染性等表面性能特别是后两者成膜共聚物的影响。结果表明,同时含有硅氟元素的共聚物由于有机硅基团中含可交联反应的基团和有机氟基团的更低的表面能而具有较高力学强度如铅笔硬度、粘接力、耐磨性和耐洗刷性及良好的防水抗污能力。 相似文献
7.
低表面能防污涂料的防污特性理论分析 总被引:26,自引:1,他引:25
从海洋污损物的粘附机理出发 ,理论上分析了低表面能防污涂料 (主要氟碳树脂防污涂料及有机硅弹性防污涂料 )防污性能的影响因素 ,并综述了低表面能防污涂料的设计思路。 相似文献
8.
9.
10.
11.
1 前言
在纳米炭黑、碳纳米管以及纳米SiO2、TiO2等无机纳米粒子表面上,当暴露出活性基团时,就可能与聚合物进行接枝反应。 相似文献
12.
13.
采用气相沉积(CVD)的方法,以十二烷基三氯硅烷和辛基三氯硅烷为扩散工质,制备了梯度表面能材料表面。对空气中水滴在水平梯度表面能材料表面上的运动现象和表面倾角为0°、30°、60°和90°情况下,梯度表面能材料表面上的水蒸气滴状凝结换热进行了可视化实验,研究了凝结液滴的长大、聚并、运动和脱落现象。结果表明:直径大于1 mm的凝结液滴峰值运动速度达到110 mm·s-1,远大于空气中液滴的运动速度。通过图像分析,分别讨论了壁面过冷度、凝结表面倾角和表面能梯度对换热和液滴运动的影响。结果表明:随着壁面过冷度的增加,凝结表面传热系数先增加后减小;当凝结表面倾角大时,由于重力作用加大,凝结表面传热系数也高;当表面能梯度较大时,运动液滴尺寸更小,速度更快,凝结表面传热系数更高。 相似文献
14.
An experimental investigation of the effect of surface energetic heterogeneity on surface diffusion using Vycor and Graphon and as gases ethane, propylene, nitrogen, and helium confirms published reports that surface diffusion proceeds more rapidly on the energetically homogeneous Graphon surfaces. Activation energies for diffusion are found to be about the same for Vycor and Graphon; thus, it is postulated that a major factor in the difference is surface roughness. A comparison of surface diffusion models shows that Fick's Law correlated results about as well as a hydrodynamic model. Both models fail to allow adequately for surface coverage. A comprehensive form of Fick's Law for surface diffusion is proposed. 相似文献
15.
方便并具有基本的清洁能力已经成为现代硬表面清洗剂一个重要的诉求点。此外,考虑到大量的家用产品是由各种塑料制成的,现代硬表面清洗剂也要求对表面安全并具有保护效果。研究了如何设计使用方便并对表面安全的硬表面清洗剂配方。 相似文献
16.
17.
A. M. Mankowich 《Journal of the American Oil Chemists' Society》1961,38(11):589-594
In a study of hard surface detergency using glyceryl trioleate, oleic acid, and octanoic acid soils with three types of anionic and three types of nonionic syndets, only potassium laurate showed maximum detergency at the CMC (critical micelle concentration), with the potassium laurateoctanoic acid system being an exception. In general glyceryl trioleate and oleic soil removal (180°F.) at the CMC was low, not over 40%; octanoic acid detergency at the CMC was substantially higher, 65 to 83%. Considerable differences in removal of the various soils by the same surfactants were found. A generalization was observed in the detergency of glyceryl trioleate soil—soil removal increased sharply on passing the CMC with increasing concentration until approximately 90% detergency was reached, at which point soil removal began to level off and approach 100% with a much smaller slope. Visual observations of the cleaning processes suggested a partial answer for the differences in soil removal. Removal or glyceryl trioleate soil by both anionic and nonionic syndets appeared to be due chiefly to a displacement action caused by preferential wetting of the basis metal. Removal of octanoic acid by the nonionic surfactants in a diffusing cloud of small particles seemed to be due to solubilization followed by emulsification and precipitation of the acid soil. Several relationships were discovered in two series of analogs (polyethenoxyethers of nonyl phenol and tridecyl alcohol). It was found that the ratio of the HLB (hydrophile-lipophile balance) values of two analogs was approximately equal to the fifth root of the ratio of their CMC values. The correlation held for analogs varying by as much as 15 moles ethylene oxide. A linear relationship was also found between HLB value and the reciprocal of the ethylene oxide mole ratio for the polyethenoxyethers of nonyl phenol. 相似文献
18.
J. J. Lichorat 《Journal of the American Oil Chemists' Society》1981,58(4):371A-372A
Three key points for hard surface detergent making are: knowledge of raw materials, understanding of product application,
and use of adequate test methods. The enormous variety of hard surface cleaner applications leads to a wide spectrum of product
types. The importance of intimately knowing cleaning equipment and technique cannot be overstated for the hard surface detergent
formulator. 相似文献
19.
20.