De-sulfation of cellulose nanowhiskers and its effects on the dispersion behavior of graphene. Issue 12 (2nd December 2017)

• Record Type: Journal Article
• Authors: Ma, Yuling; Liu, Dongyan; Zhang, Xiaotan; Sui, Guoxin
• Is Part Of: Journal of dispersion science and technology. Volume 38:Issue 12(2017)
• Page Start: 1798
• Page End: 1803
• Publication Date: 2017-12-02
• Subjects: Cellulose nanowhiskers (CNWs) -- desulfation -- graphene -- thermal stability; Emulsions -- Periodicals; Suspensions (Chemistry) -- Periodicals; Emulsions; Suspensions; 541.34
• DOI: 10.1080/01932691.2017.1283512
• Languages: English
• ISSNs: 0193-2691

Abstract

ABSTRACT: The role of negative charges on cellulose nanowhiskers (CNWs) in the aqueous dispersion behaviors of graphene has been investigated. The sulfate groups were partially removed from the CNWs with sodium hydroxide solution. Both CNWs and desulfated cellulose nanowhiskers (D-CNWs) were applied in the aqueous dispersion process of graphene. The dispersing result was evaluated by ultraviolet-visible (UV-Vis) absorption spectra. It revealed the dispersing ability of D-CNWs became worse due to the removal of sulfate groups. It demonstrated the negative charged sulfate groups on CNWs played an important role in the graphene dispersing process. GRAPHICAL ABSTRACT: