@article{2bc86a3d27c74de08a8df83dcc07daf5,
title = "Aqueous dispersion and tuning surface charges of polytetrafluoroethylene particles by bioinspired polydopamine-polyethyleneimine coating via one-step method",
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",
author = "Grewal, {Manjit Singh} and Hiroya Abe and Yasutaka Matsuo and Hiroshi Yabu",
note = "Funding Information: Data accessibility. In the manuscript, we present new data and the instructions how to reproduce the experiments are fully explained in the main text of the manuscript and electronic supplementary material. Electronic supplementary material is related to the photographs of PTFE@PDA–PEI particles before and after dispersion in influence of different constituents, supporting data of DLS and thermogravimetry measurements, SEM images of PTFE@PDA– PEI particles with DA concentration: 0.1, 0.2, 0.4 and 0.6 g l−1, and graphical abstract. The data are provided in electronic supplementary material [38]. Authors{\textquoteright} contributions. M.S.G. and H.A. synthesized PDA–PEI composites to disperse PTFE particles. Y.M. measured XPS to analyse chemical composition. M.S.G. and H.Y. wrote the whole part of the manuscript. Whole work was conducted by H.Y. Competing interests. There are no conflicts to declare. Funding. H.Y. thanks KAKENHI, JSPS and MEXT (grant nos. 20H04625, 19KK0357, 18H05482) for financial support. H.A. thanks KAKENHI (grant no. 19K15598) for financial support. Acknowledgements. Dr M. S. Grewal and Prof. Hiroshi Yabu thank technical staff Ms. Mayumi Sasaki and Ms. Shizuka Miyamoto of Yabu laboratory at WPI-AIMR, Katahira Campus, Tohoku University for DLS and SEM measurements. We are further grateful to Common Equipment Facilities of WPI-AIMR, Katahira Campus, Tohoku University to allow us to use TG-DTA instrument for thermogravimetric analysis. Publisher Copyright: {\textcopyright} 2021 The Authors.",
year = "2021",
month = aug,
doi = "10.1098/rsos.210582",
language = "English",
volume = "8",
journal = "Royal Society Open Science",
issn = "2054-5703",
publisher = "The Royal Society",
number = "8",
}