Journal
APPLIED SURFACE SCIENCE
Volume 362, Issue -, Pages 11-19Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.11.201
Keywords
Amino group functionalized GO (GO-NH2); Nanocomposites; Mechanical properties; Thermal stability; Hydrophobic properties
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Funding
- National Natural Science Foundation of China [21264001, 21004009]
- Young Scientist Foundation of Jiangxi Province [20133BCB23020]
- Foundation of Jiangxi Educational Committee [GJJ14471]
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This study proposes a new approach to prepare polyimide (PI)-based nanocomposites containing amino groups functionalized graphene oxide (GO-NH2) via in situ polymerization and thermal imidization. GO-NH2 nanosheets which exhibit excellent dispersibility and compatibility with the PI matrix were successfully obtained through the chemical reaction between graphene oxide (GO) and p-phenylenediamine (PDA). The mechanical properties, thermal stability and hydrophobic behavior of the PI/GO-NH2 composites were significantly improved compared with those of pure PI because of excellent dispersion of GO-NH2 and the strong interfacial covalent bonds between GO-NH2 and the PI matrix. With a 3 wt% GO-NH2 loading, the tensile modulus of PI/GO-NH2 nanocomposites was increased from 1930 MPa to 3139 MPa, and the tensile strength was increased from 101.5 MPa to 156.8 MPa, which were approximately 63% and 54.5% enhancement compared to the pure PI, respectively. The 10% weight loss temperature of PI/3 wt% GO-NH2 is improved 24 degrees C compared with neat PI film (539.5 degrees C). Furthermore, the hydrophobic behavior of the composite films is greatly improved. This effective approach provides a strategy for developing high-performance and multifunctional polymer -based composite materials. (C) 2015 Elsevier B.V. All rights reserved.
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