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Coatings 2019, 9(2), 139; https://doi.org/10.3390/coatings9020139

Surface Modification on Cellulose Nanofibers by TiO2 Coating for Achieving High Capture Efficiency of Nanoparticles

Research Center for Functional Materials, National Institute for Materials Science, Tsukuba 3050047, Japan
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Received: 4 January 2019 / Revised: 6 February 2019 / Accepted: 18 February 2019 / Published: 20 February 2019
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Abstract

Cellulose nanofibers were modified by TiO2 gel layer (~25 nm in thickness) via hydrolysis reaction on the surface of the cellulose nanofibers. After the TiO2 coating, the surface charge of the nanofiber dramatically changed from negative to positive. A high efficiency (~100%) of capturing negatively charged Au nanoparticles (5 nm) was successfully obtained by effectively utilizing the electrostatic interaction of surface charge between the TiO2-coated cellulose nanofibers and Au nanoparticles. Therefore, this technique of surface modification will be potentially used in improving filtration efficiency for membrane applications. View Full-Text
Keywords: cellulose nanofibers; TiO2 coating; electrostatic interaction; filtration cellulose nanofibers; TiO2 coating; electrostatic interaction; filtration
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Zhang, C.; Uchikoshi, T.; Ichinose, I.; Liu, L. Surface Modification on Cellulose Nanofibers by TiO2 Coating for Achieving High Capture Efficiency of Nanoparticles. Coatings 2019, 9, 139.

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