TiO2基超疏水-超亲水图文印版的制备工艺及其胶印应用

TiO_2-Based Superhydrophobic-Superhydrophilic Patterns:Fabrication Via an Ink-Jet Technique and Application in Offset Printing

本文采用一种新型制备工艺在镀铝版基上涂布超疏水超亲水涂层。制备工艺可分为5部分:①在版基上涂布TiO_2涂层;②采用自组装膜进行表面改性;③采用喷墨技术喷印水性抗UV油墨图文;④自组装膜经光催化分解使涂层表面具有超亲水态;⑤用水清除水性油墨图文。值得注意的是,该工艺无须使用光掩膜即可快速形成具有润湿性的图文印版。制备的超疏水-超亲水印版适用于胶印。

A superhydrophobic-superhydrophilic pattern was prepared on an anodized Al plate by a new fabrication process.The process consists of five key steps：（1） TiO2 coating of the plate,（2） surface modification with self-assembled monolayers（SAMs）,（3） formation of aqueous UV light-resistant ink patterns by an ink-jet technique,（4） photocatalytic decomposition of SAMs and surface conversion to the superhydrophilic state and（5） removal of the aqueous ink patterns by water washing.It is particularly noteworthy that the wettability pattern can be quickly formed on the plate,without the use of a photomask.The fabricated superhydrophobic-superhydrophilic pattern is shown to be applicable to offset printing.