多功能超双疏涂层的制备与性能研究

发布时间：2018-04-03 16:06

  本文选题：超双疏　切入点：导电聚合物　出处：《东北石油大学》2017年硕士论文

【摘要】：金属腐蚀造成的经济损失巨大,不但损耗金属,浪费大量能源,并且对自然环境有很大的危害。由于腐蚀性离子的渗透,传统的防腐涂层对金属基体的腐蚀防护效果往往不长效。具有特殊润湿性的超双疏涂层是近年来防腐涂层方面的研究热点。本文从材料的润湿性出发,利用仿生学原理,以环氧树脂和含氟聚合物为基底,通过加入纳米粒子构造多级粗糙结构,引入低表面能物质提高涂层的超双疏性能,并且结合电活性聚苯胺来提高涂层的防腐性能。从而通过简单的喷涂方法制备出机械性能强健、防腐蚀性能优异的新型多功能超双疏涂层,为其在摩擦环境中的防腐应用提供可能。文章主要内容可概括为以下几点:(1)通过将环氧树脂(EP)、聚苯胺(PANI)、氟化乙烯丙烯共聚物(FEP)、碳纳米管(CNTs)和SiO2纳米粒子引入到有着多级纳微表面结构的涂层中,我们成功地在铝板上制备了导电超双疏复合涂层。当聚苯胺含量为4.5 wt%时,该复合涂层获得超双疏性能,与水的接触角为157°,与甘油的接触角为154°。该涂层对铝板的附着力可达1级,在经过10000次摩擦后,疏水角仍然保持在149°。电化学测试显示该涂层有着长效防腐性能,这是由于超双疏涂层的物理屏障作用和PANI的氧化还原作用。该多功能涂层有望在石油领域得到广泛应用。(2)把核壳结构的PANI/功能化碳纳米管(fCNTs)复合材料和纳米SiO2添加到乙烯-四氟乙烯聚合物(ETFE)中构造出类似荷叶表面的纳微结构,并用全氟辛基三乙氧基硅烷(POTS)来降低材料表面能。通过简单的喷涂工艺在铝板上制备出了一种新型多功能超双疏/导电防腐涂层。制备的超双疏涂层对水、甘油以及乙二醇的接触角分别达到167°、163°和159°。该涂层在较宽的温度范围内(400°C)均呈现稳定的耐润湿性,并且对污泥、浓硫酸和乙醇/水溶液都有卓越的自清洁能力。超双疏涂层在铝板上的附着力达到1级,在经过45000次摩擦以及30次弯曲后仍保持超双疏性能。值得注意的是添加了聚苯胺的复合涂层相对于不添加聚苯胺的复合涂层拥有更优越的电化学防腐能力,在3.5 wt%NaCl溶液中浸泡90天后,仍保持极低的腐蚀速率(0.004μm/年)和较高的防腐效率(99.997%)。(3)将Al_2O_3纳米粒子通过氨丙基三乙氧基硅烷(KH-550)的偶联效应嫁接到蒙脱土(MMT)纳米片的表面,用聚二甲基硅氧烷(PDMS)进行低表面能改性,得到超疏水的Al_2O_3/MMT-PDMS复合物。将得到的复合物和POTS添加到ETFE中,通过溶液喷涂在铝板上得到多功能的超双疏复合涂层。制备的超双疏涂层对水、甘油和乙二醇的接触角高至164°、158°和155°。对石墨粉展现了卓越的自清洁能力,在铝板上的附着力达到1级。在100 kPa压力下进行8000次摩擦以及在350°C的高温热处理两小时后,涂层均可保持超疏水性能。并且该涂层在3.5 wt%NaCl溶液中浸泡30天后,仍然拥有极低的腐蚀率(4.3×10-3μm/年)和99.999%的高腐蚀防护率,展现了涂层卓越的防腐性能。
[Abstract]:Metal corrosion caused huge economic losses, not only the loss of metal, waste a lot of energy, and has great harm to the natural environment. Due to the penetration of corrosive ions, the effect of corrosion protection coating of traditional metal matrix are not long-term. Superamphiphobic coating with special wettability is a hot research field of anti-corrosion coating come from. In this paper, the wettability of the bionics principle, based on epoxy resin and fluorinated polymer substrate by adding nanoparticles to construct multi-level rough structure, the introduction of low surface energy materials to improve the coating superamphiphobic performance, and combined with the electrical activity of polyaniline to improve the corrosion resistance of the coating. The spray technique was simple prepare mechanical properties of strong corrosion resistance of new multifunctional excellent superamphiphobic coating may provide for its antiseptic application in friction in the environment. The main The content can be summarized as follows: (1) by epoxy resin (EP), polyaniline (PANI), fluorinated ethylene propylene copolymer (FEP), carbon nanotubes (CNTs) and SiO2 nanoparticles into the coating nano surface structure in multistage, we succeeded in the preparation of conductive aluminum plate superamphiphobic coating. When the PANI content is 4.5 wt%, the composite coatings obtained super hydrophobic properties, and the water contact angle is 157 DEG, glycerol and the contact angle is 154 degree. The adhesion of coating on the aluminum plate up to 1, after 10000 times of friction, the hydrophobic angle remained at 149 degrees. Electrochemical testing shows that the coating has anticorrosive properties, this is due to the oxidation of superamphiphobic coating physical barrier and PANI reduction. The multifunctional coating is expected in the oil field has been widely used. (2) the PANI/ functionalized carbon nanotube core-shell structure composite material (fCNTs) and Nano SiO2 added to ethylene tetrafluoroethylene polymer (ETFE) construct similar to a lotus leaf surface nano structure, and perfluorinated octyl triethoxysilane (POTS) to reduce the surface energy. Through a simple spray process on the aluminum plate was prepared by a novel multifunctional superamphiphobic / conductive coating. Preparation of super hydrophobic coating on water, glycerin and glycol contact angle reached 167 degrees, 163 degrees and 159 degrees. The coating in a wide range of temperature (400 degrees C) showed stable resistance and wettability of sludge, concentrated sulfuric acid and ethanol / water solution are excellent self-cleaning ability. Superamphiphobic coating on the aluminum plate of the adhesion grade 1, after 45000 times and 30 times after bending friction remains superamphiphobic performance. It is worth noting that the added composite coating of polyaniline composite coatings with respect to not add polyaniline has better electrochemical Study of corrosion resistance, after 90 days of immersion in 3.5 wt%NaCl solution, the corrosion rate remains very low (0.004 m/) anticorrosive efficiency and higher (99.997%). (3) Al_2O_3 nanoparticles by aminopropyl triethoxysilane (KH-550) coupling effect of montmorillonite (MMT) grafted onto the surface of nano film the use of two polydimethylsiloxane (PDMS) was modified with low surface energy, Al_2O_3/MMT-PDMS composite super hydrophobic. The complexes and POTS were added to the ETFE solution, by spraying superamphiphobic coating on the aluminum plate are multifunctional. Preparation of super hydrophobic coating on water, glycerin glycol contact angle up to 164 degrees, 158 degrees and 155 degrees. The graphite powders show excellent self-cleaning ability in the aluminum adhesion reached 1. 8000 times of friction under the pressure of 100 kPa and high temperature at 350 DEG C after two hours of treatment, the coating can be maintained over hydrophobic After 30 days of immersion in the 3.5 wt%NaCl solution, the coating still has very low corrosion rate (4.3 * 10-3 m/) and 99.999% high corrosion protection rate, showing the excellent anticorrosive property of the coating.

【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG174.4
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本文编号：1705916