To Adjust Wetting Properties of Organic Surface by In Situ Photoreaction of Aromatic Azide
journal contributionposted on 30.01.2007 by Feng Shi, Jia Niu, Zan Liu, Zhiqiang Wang, Mario Smet, Wim Dehaen, Yong Qiu, Xi Zhang
Any type of content formally published in an academic journal, usually following a peer-review process.
This article describes development of a simple and convenient method to provide stable low-surface-energy coatings on organic surfaces, by designing and synthesizing a surface-reactive molecule 4-azido-N-dodecylbenzamide, which bears an azide group as the reactive surface anchor and an alkyl chain as the hydrophobic tail. After the hydrophobic modification, rough organic surfaces with contact angle of about 0° can change their surface wetting properties from superhydrophilicity to superhydrophobicity, whose contact angles are above 152° and tilt angles lower than 5°. Moreover, by changing the alkyl chain to a PEO segment, a similar concept can be used to adjust the surface wetting properties from hydrophobic (contact angle ∼130°) to superhydrophilic (contact angle ∼0°).