Sustainable production and characterization of cellulose nanofibers from sweet potato residues via sodium percarbonate pre-treatment
文献类型： 外文期刊
作者： Qi Fang;Hong Nan Sun;Miao Zhang;Tai Hua Mu;Marco Garcia-Vaquero
作者机构：
关键词： Cellulose nanofibers;Sodium percarbonate;Sweet potato residues
期刊名称： International Journal of Biological Macromolecules
ISSN： 0141-8130
年卷期： 2025 年 322 卷
页码：
收录情况： SCIE（2025版） ; ; EI（2025版）
摘要： To valorize sweet potato residues into high-performance cellulose nanofibers (CNFs), this study developed an innovative eco-friendly pre-treatment strategy. Sodium carbonate (SC) and sodium percarbonate (SP) were used as sustainable alternatives to conventional alkali-based protocols. SP exhibited greater advantages in both cellulose extraction and CNFs performance than SC. Under optimized conditions (30 g/L SP, 120 °C, 4 h, 200 g/L hydrogen peroxide), the process achieved a high cellulose extraction yield of 92.94 % with 94.73 % purity. The resulting CNFs (SPCNF1) exhibited a crystallinity index of 39.64 %, thermal stability up to 349 °C, and an average fibril diameter of ∼4 nm. Their water retention capacity exceeded 2500 %, comparable to commercialized CNF. In addition, SPCNF1 showed pronounced shear-thinning behavior and the highest consistency index (K = 1.39), reflecting well-entangled fibril networks and strong colloidal interactions. These results demonstrate that SP enables efficient CNF production from sweet potato residues, as a greener alternative to conventional approaches.
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