Brown P S, Atkinson O D L A, Badyal J P S
Department of Chemistry Science Laboratories, Durham University , Durham DH1 3LE, United Kingdom.
ACS Appl Mater Interfaces. 2014 May 28;6(10):7504-11. doi: 10.1021/am500882y. Epub 2014 Apr 30.
Smooth copolymer-fluorosurfactant complex film surfaces are found to exhibit fast oleophobic-hydrophilic switching behavior. Equilibration of the high oil contact angle (hexadecane = 80°) and low water contact angle (<10°) values occurs within 10 s of droplet impact. These optically transparent surfaces display excellent antifogging and self-cleaning properties. The magnitude of oleophobic-hydrophilic switching can be further enhanced by the incorporation of surface roughness to an extent that it reaches a sufficiently high level (water contact angle <10° and hexadecane contact angle >110°), which, when combined with the inherent ultrafast switching speed, yields oil-water mixture separation efficiencies exceeding 98%.
发现光滑的共聚物-氟表面活性剂复合膜表面表现出快速的疏油-亲水性切换行为。在液滴撞击的10秒内，高油接触角（十六烷 = 80°）和低水接触角（<10°）的值达到平衡。这些光学透明表面具有优异的防雾和自清洁性能。通过引入表面粗糙度，疏油-亲水性切换的幅度可以进一步提高，达到足够高的水平（水接触角<10°，十六烷接触角>110°），当与固有的超快切换速度相结合时，油水混合物的分离效率超过98%。
