Durable superhydrophobic/highly oleophobic coatings from multi-dome SiO2 nanoparticles and fluoroacrylate block copolymers on flat substrates
Durable superhydrophobic/highly oleophobic coatings from multi-dome SiO2 nanoparticles and fluoroacrylate block copolymers on flat substrates
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由多圆顶 SiO2 纳米粒子和氟代丙烯酸酯嵌段共聚物在平面基材上形成的耐用超疏水/高疏油涂层
DOI：
10.1039/c5ta04428f
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发表时间：
2015-01-01
影响因子：
11.9
通讯作者：
Ling, He
中科院分区：
文献类型：
--
作者：
Liang Junyan;Li, Wang;Ling, He
在这里，我们专注于创建耐用的超疏水和高度憎油涂料，方法是将经氟烷基硅烷修饰的多穹顶疏水二氧化硅纳米颗粒(NPs)浇铸在玻璃板上，然后在预堆叠颗粒的表面涂覆另一层聚甲基丙烯酸甲酯-b-聚(十二氟庚基甲基丙烯酸酯；PMMA-b-PDFHM)。这种新型的多穹顶疏水SiO_2纳米粒子表面覆盖有甲基丙烯氧基，通过碱催化的原位溶胶-凝胶法将原始的SiO_2纳米粒子与γ-甲基丙烯氧基丙基三甲氧基硅烷在正丙醇溶液中反应，很容易制备出这种纳米粒子。以1H，1H，2H，2H-全氟十二烷基三乙氧基硅烷(FDTES)为原料，在四氢呋喃-H_2C_2O_4(AQ.)多穹顶疏水二氧化硅纳米颗粒的悬浮。结果表明，随着FDTES含量的减少，涂层中疏水多穹顶疏水的SiO_2纳米粒子的粘附性和聚集性降低，表面结构相对疏松，出现空洞或空洞。在这种情况下，涂层表面用十六烷支撑Cassie-Wenzel过渡态，从而表现出高憎油性和高附着力。此外，还实现了水滴的超疏水性，水滴采用低粘附弹跳卡西模式。更重要的是，经过强碱和酸性水溶液的冲刷试验后，涂层与玻璃基板的附着力仍然很好，表现出高度的憎油和超疏水性能。
Herein, we focus on the creation of durable superhydrophobic and highly oleophobic coating through the casting of multi-dome hydrophobic SiO2 nanoparticles (NPs) modified with fluoroalkylsilane onto a glass plate, followed by coating the surface of pre-stacked particles with another layer of poly(methyl methacrylate)-b-poly(dodecafluoroheptyl methacrylate; PMMA-b-PDFHM). The novel multi-dome hydrophobic SiO2 NPs had re-entrant surfaces covered by methacryloxy groups, which were facilely prepared via a reaction of pristine SiO2 NPs with γ-methacryloxypropyltrimethoxysilane (MPTMS) using an in situ alkali-catalyzed sol–gel process in an n-propanol (NPA) solution. Fluoroalkylsilane-modified SiO2 NPs were prepared by the in situ hydrolysis of 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (FDTES) in a THF–H2C2O4 (aq.) suspension of multi-dome hydrophobic SiO2 NPs. It was found that a decrease in the content of hydrolyzed–condensed FDTES contributed to the reduction in conglutination and the aggregation of multi-dome hydrophobic SiO2 NPs in the obtained coating layer, leading to a relatively loose surface structure with gaps or cavities. In this case, the coating surface supported the Cassie–Wenzel transition state with hexadecane and thus exhibited high oleophobicity with high adhesion. Moreover, superhydrophobicity with water droplets adopting a low-adhesive bouncing Cassie mode was achieved. More importantly, the coating was still well adhered to the glass substrate and demonstrated high oleophobicity and superhydrophobicity after it was subjected to scouring tests using strong base and acid aqueous solutions.