Self-aligned graphene sheets-polyurethane nanocomposites

Mohsen Moazzami Gudarzi, Seyed Hamed Aboutalebi, Nariman Yousefi, Qing Bin Zheng, Farhad Sharif, Jie Cao, Yayun Liu, Allison Xiao, Jang Kyo Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations


Processing graphene and graphene polymer nanocomposites in an aqueous medium has always been a big challenge due to the hydrophobic nature of graphene (or reduced graphene oxide) nanosheets. In this work, a waterborne latex of polyurethane has been used both as the matrix material for embedding the graphene nanosheets and as a unique stabilizer to help produce an up to 5 wt% graphene/PU nanocomposites. The graphene oxide/polyurethane latex aqueous suspension is reduced in-situ using hydrazine, without any trace of aggregation/agglomeration upon completion of the reduction process, which would otherwise have occurred severely were PU not present. A highly aligned nanostructure is produced when graphene content is increased beyond 2 wt%, resulting in a remarkable improvement in electrical and mechanical properties of the nanocomposite. The exceptionally low electrical percolation threshold of 0.078%, as well as 21-fold and 14 fold increases in tensile modulus and strength, respectively, have been attained thanks to the alignment of graphene nanosheets in the polymeric matrix.

Original languageBritish English
Title of host publicationFunctional Two-Dimensional Layered Materials - From Graphene to Topological Insulators
Number of pages6
StatePublished - 2012
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: 25 Apr 201129 Apr 2011

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Conference2011 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA


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