有機氟丙烯酸樹脂/SiO₂超疏水涂層的制備與性能

(1.西安工程大學 環境與化學工程學院, 陜西 西安 710048; 2.西安建筑科技大學 環境與市政工程學院,陜西 西安 710055)

摘要:針對普通超疏水涂層機械性能差、易腐蝕等問題,以有機氟丙烯酸樹脂和1H,1H,2H,2H-全氟癸基三甲氧基硅烷改性的納米SiO₂為原料,采用噴涂法制備了多性能的有機氟丙烯酸樹脂/SiO₂超疏水涂層,探討納米SiO₂的改性條件對改性后納米SiO₂潤濕性的影響。通過管道阻力實驗、電化學工作站及摩擦實驗評價涂層的減阻性能、防腐性能及耐磨性能。結果表明:有機氟丙烯酸樹脂/SiO₂超疏水涂層表面為多級粗糙結構,超疏水性能良好,與玻璃基底相比,噴涂在不銹鋼和鋁合金基底上的超疏水涂層水接觸角均略小。該涂層表面在一定流速下具有滑移現象,配比為1:1時超疏水涂層的減阻率較高,達到24.54%。同時,分別通過極化曲線和交流阻抗分析,維鈍電流密度出現較大幅度的減小,對不銹鋼具有較好的防腐保護作用,涂層具有良好的耐腐蝕性。此外,涂層在不銹鋼和鋁合金基底上的耐磨性相對較好,經過12次磨損后仍具有超疏水性。

關鍵詞:噴涂法; 超疏水; 減阻性; 防腐性; 耐磨性

中圖分類號:TB 33     文獻標志碼:A 

ZHAO Yamei¹,CHEN Li¹,LAN Gongyue ²,HONG Chenming¹,DING Siqi¹

（1.School of Environment and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710048,China; 2.School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

Abstract:In order to improve poor mechanical properties and easy corrosion of superhydrophobic coatings, one performance organofluoroacrylic resin/SiO₂ superhydrophobic coating was prepared by spraying method with organofluoroacrylic resin and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane modified nano-SiO₂ as raw materials. The influence of nano-SiO₂ modification conditions was discussed on the wet ability of modified nano-SiO₂, and the drag reduction performance, anti-corrosion performance and wear resistance of the coating were evaluated by pipeline resistance experiment, electrochemical workstation and friction experiment. The results show that the surface of the organofluoroacrylic resin/SiO₂ superhydrophobic coating has a multi-stage rough structure with good superhydrophobic properties, and the contact angle of the superhydrophobic coating sprayed on the stainless steel and aluminum alloy substrates is slightly smaller than that of the glass substrate. The surface of the coating has the slipping under a certain flow rate, and the drag reduction rate of the superhydrophobic coating with a ratio of 1:1 is high, reaching 24.54%. At the same time, through the polarization curve and AC impedance analysis, the current density of the dimensional passivity decreases greatly, which has a good anti-corrosion protection effect on stainless steel, and the coating has good corrosion resistance. In addition, the coating has relatively good wear resistance on stainless steel and aluminum alloy substrates, and is still superhydrophobic after 12 cycles of friction.

Key words:spraying method; superhydrophobic; drag reduction; corrosion resistance; wear resistance