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Exceptionally Reinforced Polymer Nanocomposites via Incorporated Surface Porosity on Graphene Oxide Sheets

Title
Exceptionally Reinforced Polymer Nanocomposites via Incorporated Surface Porosity on Graphene Oxide Sheets
Author
박호범
Keywords
graphene; graphene oxide; nanocomposite; polyurethane; silica
Issue Date
2017-04
Publisher
WILEY-V C H VERLAG GMBH
Citation
MACROMOLECULAR MATERIALS AND ENGINEERING, v. 302, no. 7, Article no. 1700039
Abstract
Although graphene-based materials have been used as fillers in polymer nanocomposites, a deleterious trade-off in mechanical strength and ductility is typically observed with increasing graphene loading, resulting in strong but brittle polymer nanocomposite materials. To provide outstanding compatibility with a standard high strength polymer, thermoplastic polyurethane (TPU), the use of a simple and mild sol-gel reaction to chemically attached silica nanoparticles to graphene oxide (GO) basal plane is reported. The silica modification imparts a highly porous GO surface structure, providing noncovalent attachment sites that improve physical entanglement between the GO and TPU. Furthermore, the silica modification enhances surface polarity, which imparts chemical affinity between the silica/GO nanocomposite and TPU. As a result, the prepared polymer nanocomposites exhibit significantly improved Young's modulus and tensile strength with only a small reduction of elongation at break over the neat polymer.
URI
https://onlinelibrary.wiley.com/doi/abs/10.1002/mame.201700039https://repository.hanyang.ac.kr/handle/20.500.11754/113715
ISSN
1438-7492; 1439-2054
DOI
10.1002/mame.201700039
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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