High Loading Capacity and Wear Resistance of Graphene Oxide/Organic Molecule Assembled Multilayer Film

Li Chen; Gang Wu; Yin Huang; Changning Bai; Changning Bai; Yuanlie Yu; Yuanlie Yu; Junyan Zhang; Junyan Zhang

doi:10.3389/fchem.2021.740140

Frontiers in Chemistry (Nov 2021)

High Loading Capacity and Wear Resistance of Graphene Oxide/Organic Molecule Assembled Multilayer Film

Li Chen,
Gang Wu,
Yin Huang,
Changning Bai,
Changning Bai,
Yuanlie Yu,
Yuanlie Yu,
Junyan Zhang,
Junyan Zhang

Affiliations

Li Chen: School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, China
Gang Wu: School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, China
Yin Huang: School of Petrochemical Technology, Lanzhou University of Technology, Lanzhou, China
Changning Bai: Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
Changning Bai: Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
Yuanlie Yu: Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
Yuanlie Yu: Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
Junyan Zhang: Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
Junyan Zhang: Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China

DOI: https://doi.org/10.3389/fchem.2021.740140
Journal volume & issue: Vol. 9

Abstract

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Taking advantage of the strong charge interactions between negatively charged graphene oxide (GO) sheets and positively charged poly(diallyldimethylammonium chloride) (PDDA), self-assembled multilayer films of (GO/PDDA)n were created on hydroxylated silicon substrates by alternating electrostatic adsorption of GO and PDDA. The formation and structure of the films were analyzed by means of water contact angle measurement, thickness measurement, atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). Meanwhile, tribological behaviors in micro- and macro- scale were investigated by AFM and a ball-on-plate tribometer, respectively. The results showed that (GO/PDDA)n multilayer films exhibited excellent friction-reducing and anti-wear abilities in both micro- and macro-scale, which was ascribed to the special structure in (GO/PDDA)n multilayer films, namely, a well-stacked GO–GO layered structure and an elastic 3D crystal stack in whole. Such a film structure is suitable for design molecular lubricants for MEMS and other microdevices.

Published in Frontiers in Chemistry

ISSN: 2296-2646 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: http://journal.frontiersin.org/journal/chemistry

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