本文選題：超雙疏　切入點：導電聚合物　出處：《東北石油大學》2017年碩士論文

【摘要】：金屬腐蝕造成的經(jīng)濟損失巨大,不但損耗金屬,浪費大量能源,并且對自然環(huán)境有很大的危害。由于腐蝕性離子的滲透,傳統(tǒng)的防腐涂層對金屬基體的腐蝕防護效果往往不長效。具有特殊潤濕性的超雙疏涂層是近年來防腐涂層方面的研究熱點。本文從材料的潤濕性出發(fā),利用仿生學原理,以環(huán)氧樹脂和含氟聚合物為基底,通過加入納米粒子構造多級粗糙結構,引入低表面能物質(zhì)提高涂層的超雙疏性能,并且結合電活性聚苯胺來提高涂層的防腐性能。從而通過簡單的噴涂方法制備出機械性能強健、防腐蝕性能優(yōu)異的新型多功能超雙疏涂層,為其在摩擦環(huán)境中的防腐應用提供可能。文章主要內(nèi)容可概括為以下幾點:(1)通過將環(huán)氧樹脂(EP)、聚苯胺(PANI)、氟化乙烯丙烯共聚物(FEP)、碳納米管(CNTs)和SiO2納米粒子引入到有著多級納微表面結構的涂層中,我們成功地在鋁板上制備了導電超雙疏復合涂層。當聚苯胺含量為4.5 wt%時,該復合涂層獲得超雙疏性能,與水的接觸角為157°,與甘油的接觸角為154°。該涂層對鋁板的附著力可達1級,在經(jīng)過10000次摩擦后,疏水角仍然保持在149°。電化學測試顯示該涂層有著長效防腐性能,這是由于超雙疏涂層的物理屏障作用和PANI的氧化還原作用。該多功能涂層有望在石油領域得到廣泛應用。(2)把核殼結構的PANI/功能化碳納米管(fCNTs)復合材料和納米SiO2添加到乙烯-四氟乙烯聚合物(ETFE)中構造出類似荷葉表面的納微結構,并用全氟辛基三乙氧基硅烷(POTS)來降低材料表面能。通過簡單的噴涂工藝在鋁板上制備出了一種新型多功能超雙疏/導電防腐涂層。制備的超雙疏涂層對水、甘油以及乙二醇的接觸角分別達到167°、163°和159°。該涂層在較寬的溫度范圍內(nèi)(400°C)均呈現(xiàn)穩(wěn)定的耐潤濕性,并且對污泥、濃硫酸和乙醇/水溶液都有卓越的自清潔能力。超雙疏涂層在鋁板上的附著力達到1級,在經(jīng)過45000次摩擦以及30次彎曲后仍保持超雙疏性能。值得注意的是添加了聚苯胺的復合涂層相對于不添加聚苯胺的復合涂層擁有更優(yōu)越的電化學防腐能力,在3.5 wt%NaCl溶液中浸泡90天后,仍保持極低的腐蝕速率(0.004μm/年)和較高的防腐效率(99.997%)。(3)將Al_2O_3納米粒子通過氨丙基三乙氧基硅烷(KH-550)的偶聯(lián)效應嫁接到蒙脫土(MMT)納米片的表面,用聚二甲基硅氧烷(PDMS)進行低表面能改性,得到超疏水的Al_2O_3/MMT-PDMS復合物。將得到的復合物和POTS添加到ETFE中,通過溶液噴涂在鋁板上得到多功能的超雙疏復合涂層。制備的超雙疏涂層對水、甘油和乙二醇的接觸角高至164°、158°和155°。對石墨粉展現(xiàn)了卓越的自清潔能力,在鋁板上的附著力達到1級。在100 kPa壓力下進行8000次摩擦以及在350°C的高溫熱處理兩小時后,涂層均可保持超疏水性能。并且該涂層在3.5 wt%NaCl溶液中浸泡30天后,仍然擁有極低的腐蝕率(4.3×10-3μm/年)和99.999%的高腐蝕防護率,展現(xiàn)了涂層卓越的防腐性能。
[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.

【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG174.4
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本文編號：1705916