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| Study on Preparation and Properties of Multi-carboxyl Cellulose Nanocrystal |
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| DOI：10.11981/j.issn.1000-6842.2019.03.6 |
| Key Words:cellulose nanocrystal; EDTAD-esterification; TEMPO-oxidation; dispersity |
| Fund Project:国家自然科学基金（51373131）。 |
| Author Name | Affiliation | | ZHANG Yanjie | School of Chemistry and Chemical Engineering， Southwest University， Chongqing， 400715；School of Chemistry， Chemical Engineering and Life Sciences， Wuhan University of Technology， Wuhan， Hubei Province， 430070 | | HUANG Jin | School of Chemistry and Chemical Engineering， Southwest University， Chongqing， 400715 | | MA Xiaozhou* | School of Chemistry and Chemical Engineering， Southwest University， Chongqing， 400715 |
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| Abstract: |
| Multi-carboxyl cellulose nanocrystal （ECNC） with controllable carboxyl content and substitution degree of hydroxyl was obtained by EDTAD-esterification. The results were optimized by changing the esterification conditions. FT-IR， TEM， conductimetric titration， XRD， elemental analysis and Zeta potential test were used to characterize the property of ECNC. It was found that the morphology and the integra-lity of crystal structure of cellulose nanocrystals （CNC） were maintained during EDTAD-esterification， and the dispersity of CNC in water and PBS buffer could also be improved. At the same time， the surface carboxyl content of ECNC and substitution degree of hydroxyl could be controlled by changing the esterification conditions. It was believed that ECNC could be used in the fabrication of high-efficiency nanocomposite polymers and particles． |
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