Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Integrated Computational and Experimental Design of Ductile, Abrasion-Resistant Thermoplastic Polyurethane/Graphene Oxide Nanocomposites

Full text
Show less -
Danda, Chaitanya [1] ; Amurin, Leice G. [2] ; Munoz, Pablo A. R. [2] ; Nagaoka, Danilo A. [2] ; Schneider, Tyler [1] ; Troxell, Brandy [1] ; Khani, Shaghayegh [1] ; Domingues, Sergio H. [2] ; Andrade, Ricardo J. E. [2] ; Fechine, Guilhermino J. M. [2] ; Maia, Joao M. [1]
Total Authors: 11
[1] Case Western Reserve Univ, Dept Macromol Sci & Engn, Cleveland, OH 44106 - USA
[2] Univ Prebiteriana Mackenzie, Mackenzie Inst Res Graphene & Nanotechnol MackGra, BR-01302907 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ACS APPLIED NANO MATERIALS; v. 3, n. 10, p. 9694-9705, OCT 23 2020.
Web of Science Citations: 0

Polymer nanocomposites are widely studied for improving and developing novel materials. Incorporation of nanofillers in polymer matrices impart strong behavioral changes, with the extent of dispersion of fillers in polymers playing a key role. This not only limits the amount of filler one can incorporate but also often leads to enhancement of some material properties at the expense of others. Herein, for the first time, thermoplastic polyurethane (TPU) graphene oxide (GO) nanocomposites with improved abrasion resistance and ductility are produced by integrating mesoscale modeling and a solvent-free continuous and upscalable extrusion process. The role of GO in hard segment crystallization is established via dissipative particle dynamics simulations, which then informs processing in twin-screw extrusion involving extensional mixing elements to achieve desired deagglomeration and dispersion of GO. This approach allows a tough yet highly ductile composite suitable for high abrasion resistant applications to be produced. In comparison with composites obtained from conventional processing, ductility improved by more than 300%, strength increased by 80%, toughness enhanced by more than 500%, and abrasion resistance improved by 45%. Insights into the gradient of TPU hard block crystallinity, role of deagglomeration, and phase separation are also discussed. (AU)

FAPESP's process: 17/07244-3 - Graphene-based polymer nanocomposites for application in optical communications
Grantee:Leice Gonçalves Amurin
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/06264-8 - Obtainment of polymer nanocomposites based on graphene oxide by melt intercalation
Grantee:Guilhermino José Macêdo Fechine
Support Opportunities: Scholarships abroad - Research
FAPESP's process: 14/22840-3 - Direct dry transfer of CVD graphene to 2D and 3D polymeric substrates
Grantee:Guilhermino José Macêdo Fechine
Support Opportunities: Regular Research Grants
FAPESP's process: 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration
Grantee:Antonio Helio de Castro Neto
Support Opportunities: Research Projects - SPEC Program
FAPESP's process: 17/21988-5 - Nanocomposites based on graphene derivatives, two-dimensional metal oxides and conjugated polymers for application in flexible energy storage devices
Grantee:Sergio Humberto Domingues
Support Opportunities: Regular Research Grants