Influence of poly(ethyleneimine) functionalized multi-walled carbon nanotubes on mechanical and tribological behavior of epoxy resins. (December 2022)

• Record Type: Journal Article
• Authors: Liu, Ming; Hou, Dongyang; Wu, Lixin
• Is Part Of: Materials today communications. Volume 33(2022)
• Publication Date: 2022-12
• Subjects: Resins -- Polymer-matrix composites (MPCs) -- Mechanical properties -- Wear; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2022.104480
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: Epoxy-based nanocomposites were prepared with the addition of poly(ethyleneimine) (PEI, an amine-riched polymer) functionalized multi-walled carbon nanotubes (MWCNTs), whose microstructure was characterized by TEM and FTIR spectra. Effects of PEI-functionalized MWCNTs (PEI-MWCNTs) on micromechanical properties of nanocomposites were characterized by instrumented indentation with Berkovich indenter and microscratch test with Rockwell C indenter. With the increase in the content of PEI-MWCNTs: both nanoindentation hardness and elastic modulus of nanocomposites increase; scratch normal hardness and elastic recovery rate decrease in an approximately linear way; fracture toughness obtained by scratch-based linear elastic fracture mechanics increase in an approximately linear way. Graphical Abstract: ga1