Abstract

Surface science such as superhydrophobic and superoleophilic surfaces plays a sensitive function in a separating oil/water mixture as a result of increasing industrial oil and organic solvents drainage occurrence. In this work, copper hydroxide nanoneedles layer were synthesized onto Egyptian cotton fabrics (CF) treated with polydopamine, Ag nanoparticles (NPs) and Cu NPs via facile immersion process. Fourier transform infrared, X-ray diffraction and scanning electron microscope (SEM) were used to investigate the functionalized surface of CF with copper hydroxide layer. SEM images confirmed that the modified membranes were rougher compared with pure surface of CF. The contact angle measurement emphasized the hydrophobicity of the modified membranes and it was found that the water contact angle has a value of 168°. The absorption capacity of the modified CF membrane was 10.1 g g ^− 1 for diesel oil and the separation efficiency of this modified surface was higher than 99%. It was noted that the flux in the case of low viscosity solvent as n-hexane was 72,172.9 Lm^− 2 h^− 1, while for the viscous oil as diesel was 14,460.3 Lm^− 2 h^− 1.

Graphic abstract

中文翻译：

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棉织物的新型超疏水表面，用于去除污水中的油或有机溶剂

摘要

由于增加了工业油和有机溶剂的排放，因此表面科学（例如超疏水和超亲油性表面）在分离油/水混合物中起着敏感的作用。在这项工作中，将氢氧化铜纳米针层合成到埃及棉织物（CF）上，该织物经过聚多巴胺，Ag纳米颗粒（NPs）和Cu NPs的快速浸没处理。用傅里叶变换红外，X射线衍射和扫描电子显微镜（SEM）研究了带有氢氧化铜层的CF的功能化表面。SEM图像证实，与CF的纯表面相比，改性膜更粗糙。接触角的测量强调了改性膜的疏水性，并且发现水接触角的值为168°。^{− 1}对柴油，此改性表面的分离效率高于99％。注意到在低粘度溶剂为正己烷的情况下的通量为72,172.9 Lm ^-2 h ^-1，而对于粘性油为柴油的通量为14,460.3 Lm ^-2  h ^-1。

图形摘要