Improved boundary lubrication of perfluoropolyether using fluoropolymer-grafted cellulose nanocrystal

Improved boundary lubrication of perfluoropolyether using fluoropolymer-grafted cellulose nanocrystal

As the thickener for fluorine greases, polytetrafluoroethylene (PTFE) powder performs insufficient load-carrying capacity and limited assistance for friction reduction and wear resistance in the boundary lubrication regime. The present work aims to explore novel nanoparticles with higher mechanical...

Full description

Saved in:
Bibliographic Details
Published in:Cellulose (London) Vol. 30; no. 6; pp. 3757 - 3771
Main Authors: Ge, Yue, Lin, Ning, Du, Chen, Amann, Tobias, Feng, Hao, Yuan, Chengqing, Li, Ke
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 01-04-2023
Springer Nature B.V
Subjects:
Antiwear additives
Bearing strength
Bioorganic Chemistry
Boundary lubrication
Cellulose
Ceramics
Chemistry
Chemistry and Materials Science
Composites
Engineering
Fluorine
Fluoropolymers
Fourier transforms
Friction
Friction reduction
Glass
Grafting
Graphene
Greases
Hydrocarbons
Load carrying capacity
Lubricants & lubrication
Lubrication
Nanocrystals
Nanoparticles
Natural Materials
Organic Chemistry
Original Research
Physical Chemistry
Polymer Sciences
Polytetrafluoroethylene
Sustainable Development
Wear resistance
Polytetrafluoroethylene powder
Boundary lubrication
Cellulose nanocrystals
Perfluoropolyether lubricant
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:As the thickener for fluorine greases, polytetrafluoroethylene (PTFE) powder performs insufficient load-carrying capacity and limited assistance for friction reduction and wear resistance in the boundary lubrication regime. The present work aims to explore novel nanoparticles with higher mechanical strength as an alternative to PTFE. Cellulose nanocrystals (CNCs) were surface modified by grafting (or partially adsorbing) fluoropolymer chains and introduced into perfluoropolyether PFPE base oil. The obtained polyhexafuorobutyl methacrylate grafted CNC (CNC-g-PHFMA) powder exhibited good compatibility with the PFPE oil. The friction test and wear analysis showed that CNC-g-PHFMA formed a more intensive and stable tribo-film than PTFE on the sliding surface, resulting in more effective friction reduction (11%) and wear resistance (19%). This study demonstrates that fluoropolymer-grafted CNCs have a good application prospect in fluorine greases.
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-023-05120-z