Aqueous dispersion and tuning surface charges of polytetrafluoroethylene particles by bioinspired polydopamine–polyethyleneimine coating via one-step method
Manjit Singh Grewal, Hiroya Abe, Yasutaka Matsuo, Hiroshi Yabu
Abstract
We propose a surface modification of poorly dispersive polytetrafluoroethylene (PTFE) particles via bioinspired polydopamine-polyethyleneimine (PDA-PEI) which conferred PTFE particles a uniform dispersion in aqueous medium. With increasing dopamine concentration in the reaction solution, dispersity of PTFE particles improved and the surface charges of particles changed from negative to positive due to an increase of surface coverage of PDA-PEI layers. Simplicity of the method here outlines an attractive route for surface modification of inert surfaces useful for large-scale applications.
Topics & Concepts
PolytetrafluoroethyleneDispersitySurface modificationMaterials scienceDispersion (optics)Aqueous solutionInertCoatingChemical engineeringDispersion polymerizationNanotechnologyComposite materialPolymer chemistryChemistryPolymerPolymerizationOpticsOrganic chemistryEngineeringPhysicsPolymer Surface Interaction StudiesSurface Modification and SuperhydrophobicityElectrospun Nanofibers in Biomedical Applications