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| Enzymatic Preparation of Sulfobetaine Modified Cellulose Nanofibrils and Their Aspect Ratio Regulation Process |
| Received:March 26, 2026 Revised:May 10, 2026 |
| DOI：10.11981/j.issn.1000-6842.2026.03.50 |
| Key Words:cellulose nanofibrils;sulfobetaine;cellulase;aspect ratio;Pickering emulsion |
| Author Name | Affiliation | Postcode | | Zhao Jiaxiang* | State Key Lab of Bio-based Fiber Materials， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 | 310018 | | Zhang Yuanyuan | State Key Lab of Bio-based Fiber Materials， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 | 310018 | | Zhong Ci | State Key Lab of Bio-based Fiber Materials， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 | 310018 | | Tang Yanjun | State Key Lab of Bio-based Fiber Materials， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 | 310018 | | Li Feiyun* | State Key Lab of Bio-based Fiber Materials， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 | 310018 |
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| Abstract: |
| In this study， microcrystalline cellulose （MCC-SB） modified by sulfobetaine （SB） was used to efficiently prepare sulfonate quaternized cellulose nanofibrils （CNF-SB） using cellulose enzyme. The aspect ratio of CNF-SB was controlled by varying SB dosage， and their emulsifying performances in an oil-in-water （O/W） Pickering emulsion composed of n-hexadecane/water were investigated. The results showed that when the MCC to SB mass ratio was 1∶3， the reaction temperature was 50 ℃， the pH value was 5， and the enzyme dosage was 0.6 mg， CNF-SB-3 was obtained with the highest yield of 48.6% and an aspect ratio of 60. Increasing the SB dosage to a mass ratio of MCC to SB mass ratio was 1∶5， the aspect ratio of CNF-SB-5 was 83. Furthermore， under conditions of pH value of 7， solid content of 0.5%， standing time of 3 d， and emulsification index of 100%， CNF-SB-3 in oil in water type Pickering emulsions mainly exhibited a particle size distribution range of 12~18 μm， demonstrating excellent emulsification performance. |
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