Zhou Hua, Wang Hongxia, Yang Weidong, Niu Haitao, Wei Xin, Fu Sida, Liu Shuai, Shao Hao, Lin Tong
Institute for Frontier Materials, Deakin University Geelong VIC 3216 Australia
Future Manufacturing Flagship, CSIRO Clayton South VIC 3169 Australia.
RSC Adv. 2018 Jul 30;8(47):26939-26947. doi: 10.1039/c8ra04645j. eCollection 2018 Jul 24.
Although a number of methods have been reported for the preparation of superoleophobic-superhydrophobic surfaces, a challenge still remains in preparing a surface showing simultaneous superoleophobicity and superhydrophilicity. Herein, we demonstrate a novel strategy for preparing a simultaneously superhydrophilic-superoleophobic surface on cotton fabrics. A wet chemical coating method was employed to apply an oligomer which consists of a fluorinated alkyl and a PEG-phosphate hydrophilic moiety, silica nanoparticles and fluoroalkyl silane, onto fabric substrates. The treated fabrics exhibited both superoleophobicity and superhydrophilicity with a contact angle over 150° for oil fluids (surface tension > 27 mN m) but 0° for water. Water can spread into the fabric matrix within 2 seconds. The superhydrophilic-superoleophobic fabric had excellent superoleophobicity no matter whether it was at the dry state in air, pre-wetted with water, or in underwater conditions. When being contaminated forcedly with oil or oil-free dirt, the fabric can be easily cleaned up with water without using any detergent and chemical agent. Superoleophobic-superhydrophilic surfaces may provide an alternative and feasible way for anti-fouling applications.
尽管已经报道了许多制备超疏油-超疏水表面的方法，但在制备同时具有超疏油性和超亲水性的表面方面仍然存在挑战。在此，我们展示了一种在棉织物上制备同时具有超亲水性-超疏油性表面的新策略。采用湿化学涂层法将一种由氟化烷基和聚乙二醇-磷酸盐亲水部分、二氧化硅纳米颗粒和氟代烷基硅烷组成的低聚物涂覆在织物基材上。处理后的织物表现出超疏油性和超亲水性，对油类流体（表面张力>27 mN/m）的接触角超过150°，而对水的接触角为0°。水可以在2秒内渗入织物基质。无论处于空气中的干燥状态、用水预湿还是处于水下条件，这种超亲水性-超疏油性织物都具有优异的超疏油性。当被油或无油污垢强制污染时，该织物无需使用任何洗涤剂和化学剂，用水即可轻松清洗干净。超疏油-超亲水性表面可能为防污应用提供一种替代且可行的方法。
