Study On Fabricating Patterned Bioinspired Film Via Microcontact Printing And The Polymer Brushes Functionalization

With the development of modern science and technology, bioinspired film has attracted tremendous interest; the patterned films and polymer brushes functionalization have an extensive attention because of their excellent features, unique performance. However, the fabrication is more complicated. Therefore, it is an urgent need for a robust, efficient and flexible way to fabricate. Among these micropattern approaches, microcontact printing (μCP) has been widely applied. Recently, self-initiated photografting and photopolymerization (SIPGP) has become the main method of fabricating polymer brushes even without surface-bonded initiator and catalyst. In this paper, we studied the patterned films and polymer brushes functionalization of chitosan, polydopamine, and the detailed contents are listed as follows:Firstly, we studied the patterned morphology of chitosan as "ink" molecule. Got the various patterned surfaces through different templates. At the same time, different patterned surfaces were obtained by one single template via the second printing. On the basis of the patterned surface as the template, SIPGP was successfully achieved with the functionalization of polymer brushes.Secondly, we studied the patterned topography of polydopamine as "ink" molecule. Through the same template, a variety of tunable morphologies were achieved by altering the concentration of "ink" solution during the process of μCP. Simultaneously, we controlled the topographies via UV. With the structure as a template, combined with the SIPGP, there can be selective chemical modification and endowed the new features to materials.