Comparison of the properties of polyimide nanocomposite films containing functionalized-graphene and organoclay as nanofillers

Poly(amic acid) (PAA) is prepared by the reaction of dianhydride 4,4′-biphthalic anhydride and diamine bis[4-(3-aminophenoxy)phenyl]sulfone in N,N’ -dimethylacetamide. Two types of fillers were dispersed in the as-synthesized PAA via a solution intercalation method; polyimide (PI) hybrid films were...

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Bibliographic Details
Published inScientific reports Vol. 12; no. 1; pp. 20892 - 15
Main Authors Choi, Moon Young, Lee, Seon Ju, Lim, Ae Ran, Chang, Jin-Hae
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 03.12.2022
Nature Publishing Group
Nature Portfolio
Subjects
639/301
639/638/455
Bentonite
Excipients
Graphene
Graphite
Heat treatment
Heat treatments
Humanities and Social Sciences
Microscopy, Electron, Transmission
Motion Pictures
multidisciplinary
Nanocomposites
Science
Science (multidisciplinary)
Thermal properties
Thermal stability
Transmission electron microscopy
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Summary:Poly(amic acid) (PAA) is prepared by the reaction of dianhydride 4,4′-biphthalic anhydride and diamine bis[4-(3-aminophenoxy)phenyl]sulfone in N,N’ -dimethylacetamide. Two types of fillers were dispersed in the as-synthesized PAA via a solution intercalation method; polyimide (PI) hybrid films were synthesized under various heat treatment conditions. Octylamine (C8) was introduced into graphene sheets (C8-GS) and bentonite (C8-BTN), which were then used as nanofillers in the PI hybrid films. The synthesized nanofillers were used in varying amounts of 0.25–1.00 wt% with respect to the matrix PI. The thermal and morphological properties and optical transparency of the hybrid films were investigated and compared for both C8-GS and C8-BTN at varying nanofiller content. The C8-BTN nanocomposite showed superior thermal properties, and optical transparency, and the filler was well dispersed in the PI matrix compared to the C8-GS nanocomposite. The thermal stability of the hybrid films improved upon the addition of small amounts of the nanofiller. However, beyond a certain critical filler concentration, the thermal stability declined. These results were verified through the dispersion of fillers via transmission electron microscopy.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-25178-2