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De-sulfation of cellulose nanowhiskers and its effects on the dispersion behavior of graphene |
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| Authors: | Yuling Ma Dongyan Liu Xiaotan Zhang |
| Affiliation: | 1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, PR China;2. Institute of Metal Research, University of Chinese Academy of Sciences, Beijing, PR China;3. School of Materials Science and Engineering, University of Science and Technology of China, Anhui, PR China |
| 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. |
| Keywords: | Cellulose nanowhiskers (CNWs) desulfation graphene thermal stability |