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Preparation and properties of functionalized graphene/waterborne polyurethane composites with highly hydrophobic
Author(s) -
Luo Xiaomin,
Zhang Peng,
Ren Jing,
Liu Rui,
Feng Jianyan,
Ge Binghui
Publication year - 2015
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.42005
Subject(s) - materials science , composite material , polyurethane , graphene , isophorone diisocyanate , ultimate tensile strength , thermal stability , contact angle , absorption of water , dispersion (optics) , chemical engineering , nanotechnology , physics , optics , engineering
The long‐chain functionalized graphene nanoplatelets (FGN) were functionalized by isophorone diisocyanate and then octadecylamine, the graphene functionalized/waterborne polyurethane (WPU) composites were prepared by solution mixture. The results showed that the FGN achieved good dispersion with exfoliated and intercalated nanostructure and strong interfacial adhesion with WPU, which made the nano–composites have a significant enhancement of thermal stability and mechanical properties at low FGN loadings. With 1.5% of FGN added, the tensile strength of the composites reached the maximum of 17 MPa, which improved by 41.6%, the water absorption of the composites is only 6.7%. With the incorporation of 2 wt % FGN, and the static contact angle of the composites reached to about 120°, showing the high hydrophobicity. At the same time, the volume resistivity of the composites was changed from 2.34 × 10 12 Ω·cm to 3.77 × 10 9 Ω·cm. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42005.