Premium
Structure evolution mechanism of polyacrylonitrile films incorporated with graphene oxide during oxidative stabilization
Author(s) -
Li Fengmei,
Chen Yankun,
Li Mengzhu,
Liu Yunfei,
Wang Biao
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47701
Subject(s) - polyacrylonitrile , oxide , graphene , materials science , polymer chemistry , chemical structure , oxygen , molecule , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , chemical engineering , radical , decomposition , polymer , chemistry , organic chemistry , composite material , nanotechnology , engineering , metallurgy
Oxidative stabilization is a key process for polyacrylonitrile (PAN)‐based carbon materials. During this process, oxygen has a significant influence on the formation of cyclization structure and crosslinking structure of PAN matrix. Here, graphene oxide (GO) was used as filler in PAN matrix, the structure evolution of GO/PAN composite was studied during oxidative stabilization. Solubility measurement revealed that the crosslinking degree increased, while the cyclization degree of stabilized films decreased after GO incorporation. The effect of GO on the structure of PAN film was characterized by XRD, DSC, DMA, FTIR, and XPS. These results verified that GO could initiate the cyclization reaction of PAN at a lower temperature. The carboxylic groups on GO sheets might take part in the cyclization reactions during the heat treatment. Moreover, the oxygen‐containing molecules released from GO decomposition during the heat treatment were beneficial to the formation of crosslinking structure. The possible mechanism of the structure evaluation was proposed in this article. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47701.