摘要： 【目的】改善原油集输过程中凝油团黏附现象。【方法】采用多层喷涂与聚合物交联协同制备方法，以聚乙烯醇（PVA）、壳聚糖（CS）、二氧化钛（TiO₂）纳米颗粒共混体系为基层，戊二醛（GA）水溶液为交联层，聚多巴胺（PDA）溶液为强化层，成功制备了超亲水 /水下超疏油复合涂层。通过水油接触角表征涂层的润湿性，通过红外光谱仪（ FT-IR）、扫描电镜（SEM）表征涂层表面成分及微观形貌，同时测试涂层的耐久性及水下抗油黏附性。【结果】喷涂 GA水溶液后 80 ℃下固化 3h，喷涂 PDA溶液后先在 80 ℃下反应 1h，再于 60 ℃下固化 2h，所得涂层在空气中水接触角为 5. 4°，水下对多种油品的接触角均 >160°。GA成功交联 CS、PVA和 PDA，形成致密交联网络； PDA外层显著提高表面亲水性及与基底黏结强度。经 100次摩擦循环及 100次剥离循环测试后，涂层水接触角在 10°左右，水下油接触角 >160°。将复合涂层置于管道输油搅拌模拟装置中进行抗原油黏附性及矿化度实验，涂层有稳定的抗原油黏附性。【结论】制备的复合涂层具有良好的耐久性和优异的抗原油黏附性。

关键词: 戊二醛, 交联, 聚多巴胺, 超亲水, 水下超疏油, 复合涂层

Abstract: ［Objective］ To improve the adhesion phenomenon of gelled oil aggregates duringcrude oil gathering and transportation.［Methods］ A superhydrophilic/underwater superoleophobiccomposite coating was successfully fabricated by a synergistic preparation method combining multilayerspraying and polymer cross-linking. In this process，a blended system consisting of polyvinyl alcohol（PVA）chitosan（CS），and titanium dioxide nanoparticles（TiO₂）was used as the base layer，aqueous glutaralde，hyde（GA） solution as the cross-linking layer，and polydopamine（PDA） solution as the reinforcing layer. The wettability of the coating was evaluated by measuring the water and oil contactangles. Additionally，the surface composition and micro-morphology of the coating were characterized by Fourier transform infrared spectroscopy（FT-IR） and scanning electron microscopy（SEM）. Meanwhile，the durability and underwater oil adhesion resistance of the coating were tested.［Results］ The coating was cured at 80 ℃ for 3 hours after spraying the aqueous GA solution，and then reacted at 80 ℃ for 1 hour followed by curing at 60 ℃ for 2 hours after spraying the PDA solution. The resultingcoating exhibited a water contact angle of 5. 4° in air and underwater oil contact angles exceeding 160°for various oil types. GA successfully cross-linked CS，PVA，and PDA，forming a dense cross-linked network. The outer PDA layer significantly enhanced the surface hydrophilicity and the adhesionstrength to the substrate. After 100 friction cycles and 100 peeling tests，the coating still maintained awater contact angle of approximately 10° and an underwater oil contact angle of more than 160°. Whentested in a stirred pipeline oil transportation simulation device for crude oil adhesion resistance andsalinity tolerance，the composite coating showed stable crude oil adhesion resistance.［Conclusion］ The prepared composite coating exhibits excellent durability and outstanding resistance to crude oiladhesion. 

Key words: glutaraldehyde, cross-linking, polydopamine, superhydrophilic, underwater superoleophobicity, composite coating

中图分类号: 

• TQ637