Modified Graphene/Polyimide Nanocomposites: Reinforcing
and Tribological Effects
Ting Huang
Yuanshi Xin
Tongsheng Li
Steven Nutt
Chao Su
Haiming Chen
Pei Liu
Zuliang Lai
10.1021/am400635x.s001
https://acs.figshare.com/articles/journal_contribution/Modified_Graphene_Polyimide_Nanocomposites_Reinforcing_and_Tribological_Effects/2405611
By taking advantage of design and
construction of strong graphene–matrix interfaces, we have
prepared modified graphene/polyimide (MG/PI) nanocomposites via a
two-stage process consisting of (a) surface modification of graphene
and (b) <i>in situ</i> polymerization. The 2 wt % MG/PI
nanocomposites exhibited a 20-fold increase in wear resistance and
a 12% reduction in friction coefficient, constituting a potential
breakthrough for future tribological application. Simultaneously,
MG also enhanced thermal stability, electrical conductivity, and mechanical
properties, including tensile strength, Young’s modulus, storage
modulus, and microhardness. Excellent thermal stability and compatibility
of interface, strong covalent adhesion interaction and mechanical
interlocking at the interface, as well as homogeneous and oriented
dispersion of MG were achieved here, contributing to the enhanced
properties observed here. The superior wear resistance is ascribed
to (a) tribological effect of MG, including suppression effect of
MG in the generation of wear debris and protective effect of MG against
the friction force, and (b) the increase in mechanical properties.
In light of the relatively low cost and the unique properties of graphene,
the results of this study highlight a pathway to expand the engineering
applications of graphene and solve wear-related mechanical failures
of polymer parts.
2013-06-12 00:00:00
friction coefficient
tribological effect
graphene
storage modulus
Tribological EffectsBy
suppression effect
friction force
covalent adhesion interaction
interface
MG
future tribological application
polymer parts
surface modification
engineering applications