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

doi:10.1098/rsos.210582

Aqueous dispersion and tuning surface charges of polytetrafluoroethylene particles by bioinspired polydopamine-polyethyleneimine coating via one-step method

R Soc Open Sci. 2021 Aug 4;8(8):210582. doi: 10.1098/rsos.210582. eCollection 2021 Aug.

Authors

Manjit Singh Grewal¹, Hiroya Abe², Yasutaka Matsuo³, Hiroshi Yabu¹

Affiliations

¹ WPI-Advanced Institute of Materials Research (WPI-AIMR), Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan.
² Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan.
³ Research Institute for Electronic Science (RIES), Hokkaido University, N21W10, Kita-Ku, Sapporo 001-0021, Japan.

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.

Keywords: nanoparticles; polydopamine; polyethyleneimine; polytetrafluoroethylene; surface charges.

Associated data

figshare/10.6084/m9.figshare.c.5527128