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Title: Effect of graphene oxide sheet size on the curing kinetics and thermal stability of epoxy resins
Authors: Wang, Xiao
Jin, Jie
Song, Mo
Lin, Yue
Keywords: Graphene oxide
Epoxy resin
Curing kinetics
Thermal stability
Sheet size
Issue Date: 2016
Publisher: © IOP Publishing
Citation: WANG, X. ... et al, 2016. Effect of graphene oxide sheet size on the curing kinetics and thermal stability of epoxy resins. Materials Research Express, 3 (10), pp. 105303-105303.
Abstract: This work revealed the influences of graphene oxide (GO) sheet size on the curing kinetics and thermal stability of epoxy resins. A series of GO/epoxy nanocomposites were prepared by the incorporation of three different sized GOsheets, namely GO-1, GO-2 and GO-3, the average size of which was 10.79 μgm, 1.72 μgmand 0.70 μgm, respectively. The morphologies of the nanocomposites were observed by field emission gun scanning electron microscope. The dispersion quality of each sized GO was comparable in the epoxy matrix. The curing kinetics was investigated by means of differential scanning calorimetry and analyzed based on kinetics model. Addition of a small amount of GO (0.1 wt%) exhibited strong catalytic effect on the curing reaction of epoxy resin. The activation energy was reduced by 18.9%, 28.8% and 14.6% with addition of GO-1, GO-2 and GO-3, respectively. GO-2 with medium size (1.72 μgm) showed the most effective catalysis on the cure. The thermal stability of the cured resins was evaluated based on thermogravimetric analysis. GO/epoxy nanocomposites showed improved thermal stability in the range of 420 °C-500 °C, compared with the pure resin. A∼4%more residue was obtained in each of the incorporated system. The variations of GOsheet size did not influence the enhancement effect on the thermal stability.
Description: This is an author-created, un-copyedited version of an article accepted for publication/published in Materials Research Express. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/10.1088/2053-1591/3/10/105303.
Sponsor: This work was funded by the National Natural Science Foundation of China (NSFC) (Grant No. 51503205), Chinese Academy of Sciences(CAS) ‘Light of West China’ Program.
Version: Accepted
DOI: 10.1088/2053-1591/3/10/105303
URI: https://dspace.lboro.ac.uk/2134/23971
Publisher Link: http://dx.doi.org/10.1088/2053-1591/3/10/105303
Appears in Collections:Published Articles (Materials)

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