Effects of crosslinking agents on the physical properties of polyimide/amino‐functionalized graphene oxide hybrid films

The effects of crosslinking agents (crosslinkers) on polyimide (PI)/graphene oxide (GO) hybrid films were extensively investigated. The surface of GO was modified with amino groups using 4‐aminobenzylamine to improve compatibility with pyromellitic dianhydride/4,4′‐oxydianiline PI, and two kinds of...

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Bibliographic Details
Published in:Polymer international 2018-05, Vol.67 (5), p.588-597
Main Authors: Jeong, Keuk‐Min, Li, Yuheng, Yoo, Dae‐Geon, Lee, Nam‐Kyoung, Lee, Hyeok‐Gi, Ando, Shinji, Ha, Chang‐Sik
Format: Article
Language:English
Subjects:
Amino groups
Chains
Charge transfer
Crosslinking
Dianhydrides
Glass transition temperature
Graphene
graphene oxide
Heat resistance
Hybrids
Mechanical properties
Melamine
Optical properties
Physical properties
polyimide
Stiffness
Thermal resistance
transparency
Triazine
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Summary:The effects of crosslinking agents (crosslinkers) on polyimide (PI)/graphene oxide (GO) hybrid films were extensively investigated. The surface of GO was modified with amino groups using 4‐aminobenzylamine to improve compatibility with pyromellitic dianhydride/4,4′‐oxydianiline PI, and two kinds of crosslinkers were used: tris(4‐aminophenyl)amine and 1,3,5‐triazine‐2,4,6‐triamine (melamine). The mechanical, thermal and optical properties of the PI hybrid films were investigated. In particular, the transparency and physical properties of the PI hybrid films containing amino‐functionalized GO with homogeneous dispersion were improved. As the content of the crosslinker increased, a crosslinking network was formed between the PI chains, and the stiffness of the hybrid films was increased. The glass transition temperature, heat resistance and mechanical properties were also enhanced. The PI hybrids prepared with a rigid crosslinker exhibited higher optical transparency due to the reduction of the intermolecular charge transfer interactions with increasing interchain spacing between the PI chains. © 2018 Society of Chemical Industry The mechanical, thermal and optical properties of pyromellitic dianhydride/4,4′‐oxydianiline polyimide/amino‐functionalized graphene oxide hybrid films were investigated with focus on the effects of crosslinking agents (tris(4‐aminophenyl)amine and 1,3,5‐triazine‐2,4,6‐triamine (melamine)) on the physical properties of the hybrid films.
ISSN:0959-8103
1097-0126
DOI:10.1002/pi.5555