基于聚多巴胺的超疏水棉织物的一锅法制备及其油水分离性能

Superhydrophobic Cotton Fabric Based on Polydopamine via Simple One-Pot Immersion for Oil Water Separation

将棉织物浸入多巴胺、硝酸银、十六烷基三甲氧基硅烷的乙醇溶液中,取出烘干制备出超疏水棉织物。用扫描电子显微镜和X射线光电子能谱表征其表面形貌和元素,用接触角测量仪测量其接触角并进行摩擦或液体浸泡(如酸、碱、沸水)实验检测其耐用性。结果表明,聚多巴胺的强附着性使原位生成的银纳米粒子能经受摩擦或不同液体的浸泡,从而使超疏水织物具有良好的耐用性。超疏水棉织物还具有良好的油水分离性能,其油水分离效率高达97%,油流量最高可达15.93 m^(3)·m^(-2)·h^(-1)。

Superhydrophobic fabric was fabricated by dipping the cotton fabric into ethanol solution of dopamine,silver nitrate and hexdecyltrimethoxysilane followed by bakingdry,and of which the surface morphology and chemical composition were characterized by scanning electron microscope and x-ray photoelectron spectroscope,respectively.Surface wettability was measured by contact angle meter.Du-rability was assessed by abrasion or immersion in different aqueous solutions of acid,alkali,or boiling wa-ter.Results show that the in-situ-generated Ag particles were retained after abrasion or immersion test due to the high adhesion of polydopamine;thus,the so-obtained superhydrophobic fabric possessed good durability.Moreover,the superhydrophobic fabric showed good oil-water separation performance with oil-water separation efficiency up to 97%and oil flow up to 15.93 m^(3)·m^(-2)·h^(-1).