| Full text | |
| Author(s): 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
|
| Affiliation: | [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 |
| Abstract | |
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 |