A new protocol for efficient and high yield preparation of cellulose nanofibrils

作者：Peng, Yangyang; Duan, Chaoyu; Elias, Retulainen; Lucia, Lucian A.; Fu, Shiyu^*

来源：Cellulose, 2019, 26(2): 877-887.

DOI：10.1007/s10570-018-2112-9

• Cellulose nanofibrils
• Acid hydrolysis
• High yield
• Neutralization

Nanocellulose has attracted considerable attention in virtue of the unique mechanical and optical properties. There were less cost-efficient methods for its mass production. In this paper, a facile high yield procedure for cellulose nanofibrils consisting of sulfuric acid treatment followed by alkali neutralization and homogenization was developed. The product was termed acid-assisted cellulose nanofibrils (AACNF). AACNF yield was 91.6% from dissolving pulp when 55wt% sulfuric acid was applied at 45 degrees C for 40min. The diameter was 10-20nm, while the length varied from 40 to 800nm. AACNF aqueous suspension showed good transparency at 600nm having rheological properties similar to cellulose nanocrystals. The crystallinity of AACNF was 81.3% and displayed thermal properties that in comparison to traditional nanocellulose were very attractive because of neutralization. This study provided a facile high yield procedure for the production of nanocellulose with similar characteristics to traditional nanocellulose, which was significant to commercialization of nanocellulose.
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• 出版日期2019-1
• 单位华南理工大学; 制浆造纸工程国家重点实验室