Modification of PTFE and PMMA for biocompatibility evaluation and their applications

In this study, butyllithium was catalyzed by different electron-donating solvents (ethyldiamine, butyldiamine and ethylamine) for defluorination and alkylation to modify PTFE. FTIR-ATR and a ESCA results were used to analyze the composition of unmodified / modified surfaces and contact angles were measured to distinguish the variation of hydrophobicity.
In vitro cerebellum cortical granule cells culturing was then used to test the biocompatibility of PTFE before and after modification, Microfluidic channels were also used to produce differential hydrophilic surfaces for cell patterning. Finally, a Metallurgical Microscope and a SEM were used to observe cell growing. According to the experimental results, cells could not adhere to unmodified PTFE surfaces. On the other hand, small populations of cells and synapse extension were observed on the modified PTFE surface.