Superhydrophobic Polyurethane Foam Coated with Polysiloxane-Modified Clay Nanotubes for Efficient and Recyclable Oil Absorption,ACS Applied Materials & Interfaces

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Superhydrophobic Polyurethane Foam Coated with Polysiloxane-Modified Clay Nanotubes for Efficient and Recyclable Oil Absorption
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-06-18 00:00:00 , DOI: 10.1021/acsami.9b08023
Fan Wu ₁ , Kylene Pickett ₂ , Abhishek Panchal ₂ , Mingxian Liu ₁ , Yuri Lvov _{2,

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Affiliation

Superhydrophobic polyurethane foam (PUF) is prepared by surface coating of halloysite nanotubes. The nanotubes were first modified by surface grafting with hexadecyltrimethoxysilane, followed by assembly on the PUF by dip coating. This treatment makes the water contact angle of the modified PUF higher than 150°. The modified foam has a highly selective absorption of oils and organic solvents. The absorption ratios of the modified PUF for chloroform and dichloroethane reached 104 and 74, respectively. Such superhydrophobic foam can maintain the oil absorption performance even after 10 absorption–squeezing cycles, demonstrating good recyclability. The modified foam can pick up oil or organic solvent continuously and quickly from water’s surface. This hydrophobic nanotube coating also enhances the flame retardancy of the PUF, and the modified foam will extinguish itself maintaining its integrity. The preparation method for hydrophobic and flame-retardant PUF by coating with natural clay nanotubes is a simple process and promises scalable applications in oil–water separation.

中文翻译：

超疏水聚氨酯泡沫包覆聚硅氧烷改性的粘土纳米管，可高效，可回收地吸收油

超疏水聚氨酯泡沫（PUF）是通过埃洛石纳米管的表面涂层制备的。首先通过用十六烷基三甲氧基硅烷进行表面接枝改性纳米管，然后通过浸涂将其组装在PUF上。这种处理使改性PUF的水接触角大于150°。改性泡沫具有对油和有机溶剂的高度选择性吸收。改性PUF对氯仿和二氯乙烷的吸收率分别达到104和74。这种超疏水性泡沫即使在10个吸收-挤压循环后仍可保持吸油性能，显示出良好的可回收性。改性泡沫可以连续，快速地从水表面吸收油或有机溶剂。这种疏水性纳米管涂层还增强了PUF的阻燃性，改性泡沫将自行熄灭，保持其完整性。通过用天然粘土纳米管涂层制备疏水性和阻燃性PUF的方法是一种简单的方法，有望在油水分离中得到可扩展的应用。

更新日期：2019-06-18

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