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Multifunctional polyimide/graphene oxide composites via in situ polymerization
Author(s) -
Zhu Jiadeng,
Lim Jun,
Lee CheolHo,
Joh HanIk,
Kim Hwan Chul,
Park Byoungnam,
You NamHo,
Lee Sungho
Publication year - 2014
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.40177
Subject(s) - graphene , materials science , composite material , polyimide , oxide , graphite oxide , in situ polymerization , polymerization , percolation (cognitive psychology) , composite number , graphite , percolation threshold , polymer , electrical resistivity and conductivity , nanotechnology , layer (electronics) , engineering , neuroscience , electrical engineering , metallurgy , biology
In this article, we detail an effective way to improve electrical, thermal, and gas barrier properties using a simple processing method for polymer composites. Graphene oxide (GO) prepared with graphite using a modified Hummers method was used as a nanofiller for r‐GO/PI composites by in situ polymerization. PI composites with different loadings of GO were prepared by the thermal imidization of polyamic acid (PAA)/GO. This method greatly improved the electrical properties of the r‐GO/PI composites compared with pure PI due to the electrical percolation networks of reduced graphene oxide within the films. The conductivity of r‐GO/PI composites (30:70 w/w) equaled 1.1 × 10 1 S m −1 , roughly 10 14 times that of pure PI and the oxygen transmission rate (OTR, 30:70 w/w) was reduced by about 93%. The Young's modulus of the r‐GO/PI composite film containing 30 wt % GO increased to 4.2 GPa, which was an approximate improvement of 282% compared with pure PI film. The corresponding strength and the elongation at break decreased to 70.0 MPa and 2.2%, respectively. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40177.