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Solvothermal synthesis of graphene oxide and its composites with poly(ε-caprolactone)
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Chin, Seow J., Doherty, Matthew, Vempati, Sesha, Dawson, Paul, Byrne, Cormac, Meenan, Brian J., Guerra, Valentina and McNally, Tony (2019) Solvothermal synthesis of graphene oxide and its composites with poly(ε-caprolactone). Nanoscale, 11 (40). pp. 18672-18682. doi:10.1039/C9NR04202D
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WRAP-solvothermal-synthesis-graphene-oxide-composites-poly(ε-caprolactone)-McNally-2019.pdf - Accepted Version Embargoed item. Restricted access to Repository staff only until 20 September 2020. Contact author directly, specifying your specific needs. - Requires a PDF viewer. Download (1927Kb) |
Official URL: http://dx.doi.org/10.1039/C9NR04202D
Abstract
Graphene oxide (GO) was prepared by a solvothermal synthesis method using sodium and ethanol. A sequence of pyrolysis, washing and purification steps was developed for the total removal of all by-products. The first pyrolysis step is essential to obtain graphitic forms of carbon while a washing and a second pyrolysis step further improved the graphenic structures obtained via the reduction of OH/COOH and C-O groups and the attendant increase in C=C bonding (sp2 hybridization). Two purification processes were employed to remove sodium carbonate (by-product), i.e. vacuum filtration and centrifugation, but the latter produced a more stable GO product, typically with a few-layer (ca 3nm) stack and relatively long platelets (up to ca 1.3 µm). The functionality of this GO was demonstrated by preparing composites of it with poly(ε-caprolactone) (PCL). The GO was arranged in flower-like domains dispersed in the PCL matrix. The crystalline content of PCL decreased on addition of GO, though the dynamic modulus of PCL increased and an electrical percolation at 0.5vol% GO was obtained, manifest by a ~104 increase in electrical conductivity (in an overall increase of ~105 achieved at > 1vol%), more than sufficient for anti-static applications.
| Item Type: | Journal Article | ||||||||
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| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||
| Journal or Publication Title: | Nanoscale | ||||||||
| Publisher: | Royal Society of Chemistry | ||||||||
| ISSN: | 2040-3364 | ||||||||
| Official Date: | 2019 | ||||||||
| Dates: |
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| Date of first compliant deposit: | 23 September 2019 | ||||||||
| Volume: | 11 | ||||||||
| Number: | 40 | ||||||||
| Page Range: | pp. 18672-18682 | ||||||||
| DOI: | 10.1039/C9NR04202D | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access |
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