In this talk, we will discuss methods to covalently attach functional polymer coatings onto parylene substrates for biomedical applications. We use a method called initiated chemical vapor deposition (iCVD) to deposit the polymer coatings. In the iCVD process, we flow monomer and initiator gases into a pancake-shaped reactor. The initiator is broken into free radicals via a hot filament array. The initiator radicals and monomer molecules diffuse to the surface of the substrate and polymerization occurs via a free radical mechanism. Parylene is used as a substrate in many biomedical applications. Since Parylene is inert, it is often necessary to modify the surface with functional polymer coatings. These coatings should be covalenty attached to prevent dissolution or delamination. We will discuss two main methods that we have developed to covalently attach the iCVD polymers onto the Parylene substrate. In one method, we use a photo-initiator to create a cross-linked anchoring layer. In the second method, we use a plasma step to create radicals directly on the surface in order to graft the chains.

Deposition of functional polymers coatings onto parylene substrates for biomedical applications

251st National Meeting (2016)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.