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Preparation of a stable aqueous suspension of reduced graphene oxide by a green method for applications in biomaterials.

Authors
  • Ji, Xiang1
  • Song, Yahui2
  • Han, Jing1
  • Ge, Lin3
  • Zhao, Xiaoxiang2
  • Xu, Chen4
  • Wang, Yongqiang5
  • Wu, Di1
  • Qiu, Haixia6
  • 1 Huanhu Hospital, Tianjin 300060, PR China; Tianjin Cerebral Vascular and Neural Degenerative Disease Key Laboratory, Tianjin 300060, PR China. , (China)
  • 2 School of Science, Tianjin University, PR China. , (China)
  • 3 Tianjin Medical University, Tianjin 300072, PR China. , (China)
  • 4 Beijing 302 Hospital, Beijing 300060, PR China. , (China)
  • 5 Tianjin First Center Hospital, Tianjin 300192, PR China. Electronic address: [email protected] , (China)
  • 6 Huanhu Hospital, Tianjin 300060, PR China. Electronic address: [email protected] , (China)
Type
Published Article
Journal
Journal of Colloid and Interface Science
Publisher
Elsevier
Publication Date
Jul 01, 2017
Volume
497
Pages
317–324
Identifiers
DOI: 10.1016/j.jcis.2016.09.049
PMID: 28288378
Source
Medline
Keywords
License
Unknown

Abstract

A green approach for the preparation of a stable reduced graphene oxide (RGO) suspension from graphene oxide (GO) has been developed. This method uses l-serine (l-Ser) as the reductant and yellow dextrin (YD) as the stabilizing agent. X-ray photoelectron spectroscopy, UV-vis spectroscopy, X-ray diffraction and thermogravimetric analyses showed that l-Ser can efficiently reduce GO at a comparatively low temperature, and that the YD adsorbed onto the RGO facilitating the formation of a stable RGO aqueous suspension. Since l-Ser and YD are natural environmentally friendly materials, this approach provides a green method to produce stable RGO from GO on a large scale. Sodium salicylate (SS) which has an aromatic structure was loaded onto the RGO through π-π interactions and a maximum loading capacity of 44.6mg/g was obtained. The release of the loaded SS can be controlled by adjusting the solution pH, and a 74.8% release was reached after 70h at pH 7.4. The release profile of SS could be further controlled by incorporating it into RGO Dispersed carboxylated chitosan films.

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