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Effects of modification of palygorskite on superamphiphobicity and microstructure of palygorskite@fluorinated polysiloxane superamphiphobic coatings
Applied Clay Science ( IF 5.6 ) Pub Date : 2018-08-01 , DOI: 10.1016/j.clay.2018.01.015
Penglin Zhang , Ning Tian , Junping Zhang , Aiqin Wang

Abstract Palygorskite (PAL) is a promising natural clay mineral for the preparation of bionic super anti-wetting coatings, a new application field of PAL. Here, the effects of modification of PAL on superamphiphobicity and microstructure of the PAL@fluorinated polysiloxane (PAL@fluoroPOS) superamphiphobic coatings were systematically studied. First, PAL was modified via acid activation, solid-state grinding and heat activation. Then, the PAL@fluoroPOS coatings were prepared by hydrolytic condensation of 1H,1H,2H,2H-perfluorodecyltriethoxysilane and tetraethoxysilane onto the modified PAL, followed by spay-coating onto substrates. It was found that the microstructure of the coatings is controllable by acid activation and solid-state grinding. Acid activation with HCl at moderate conditions (2 M HCl, 15 °C) and grinding for a proper time (10 min) are helpful to improve superamphiphobicity of the coatings by forming smaller protrusions and micropores on the surface of the coatings. On the contrary, heat activation results in decline of the superamphiphobicity, especially at high temperature. The achieved coatings show excellent superamphiphobicity, and are mechanically robust and thermally stable, which can withstand intensive water jetting at 100 kPa for 20 min and 350 °C for 1 h. Moreover, the coatings can be applied onto various substrates like aluminum foil, PTFE plate, wood plate and polyester textile. We believe that the findings will promote the development of novel clay-based super anti-wetting coatings.

中文翻译:

坡缕石改性对坡缕石@氟化聚硅氧烷超疏水涂层超疏水性及微观结构的影响

摘要 坡缕石(PAL)是一种很有前景的天然粘土矿物,可用于制备仿生超抗湿涂料,是 PAL 的一个新应用领域。在这里,系统地研究了 PAL 改性对 PAL@氟化聚硅氧烷 (PAL@fluoroPOS) 超疏水涂层的超疏水性和微观结构的影响。首先,通过酸活化、固态研磨和热活化对 PAL 进行了改性。然后,通过将 1H,1H,2H,2H-全氟癸基三乙氧基硅烷和四乙氧基硅烷水解缩合到改性 PAL 上,然后喷涂到基材上来制备 PAL@fluoroPOS 涂层。发现涂层的微观结构可以通过酸活化和固态研磨来控制。在中等条件下用 HCl 酸活化(2 M HCl,15 °C) 并研磨适当的时间 (10 min) 有助于通过在涂层表面形成较小的突起和微孔来提高涂层的超疏水性。相反,热活化导致超疏水性下降,尤其是在高温下。所获得的涂层显示出优异的超疏水性,并且具有机械强度和热稳定性,可承受 100 kPa 20 分钟和 350 °C 下 1 小时的强烈水喷射。此外,该涂料可应用于各种基材,如铝箔、聚四氟乙烯板、木板和聚酯织物。我们相信,这些发现将促进新型粘土基超抗润湿涂料的开发。相反,热活化导致超疏水性下降,尤其是在高温下。所获得的涂层显示出优异的超疏水性,并且具有机械强度和热稳定性,可承受 100 kPa 20 分钟和 350 °C 下 1 小时的强烈水喷射。此外,该涂料可应用于各种基材,如铝箔、聚四氟乙烯板、木板和聚酯织物。我们相信,这些发现将促进新型粘土基超抗润湿涂料的开发。相反,热活化导致超疏水性下降,尤其是在高温下。所获得的涂层显示出优异的超疏水性,并且具有机械强度和热稳定性,可以承受 100 kPa 20 分钟和 350°C 1 小时的强烈水喷射。此外,该涂料可应用于各种基材,如铝箔、聚四氟乙烯板、木板和聚酯织物。我们相信,这些发现将促进新型粘土基超抗润湿涂料的开发。该涂料可应用于各种基材,如铝箔、聚四氟乙烯板、木板和聚酯织物。我们相信,这些发现将促进新型粘土基超抗润湿涂料的开发。该涂料可应用于各种基材,如铝箔、聚四氟乙烯板、木板和聚酯织物。我们相信,这些发现将促进新型粘土基超抗润湿涂料的开发。
更新日期:2018-08-01
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