Yi Tan, Zhao Hanyu, Mo Qi, Pan Donglei, Liu Yang, Huang Lijie, Xu Hao, Hu Bao, Song Hainong
College of Light Industry and Food Engineering, Guangxi University, Junwu Rd, Xixiangtang District, Nanning 530004, China.
Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Junwu Rd, Xixiangtang District, Nanning 530004, China.
Materials (Basel). 2020 Nov 10;13(22):5062. doi: 10.3390/ma13225062.
This review summarizes the preparation methods of cellulose nanofibrils (CNFs) and the progress in the research pertaining to their surface modification. Moreover, the preparation and surface modification of nanocellulose were comprehensively introduced based on the existing literature. The review focuses on the mechanical treatment of cellulose, the surface modification of fibrillated fibers during pretreatment, the surface modification of nanocellulose and the modification of CNFs and their functional application. In the past five years, research on cellulose nanofibrils has progressed with developments in nanomaterials research technology. The number of papers on nanocellulose alone has increased by six times. However, owing to its high energy consumption, high cost and challenging industrial production, the applications of nanocellulose remain limited. In addition, although nanofibrils exhibit strong biocompatibility and barrier and mechanical properties, their high hydrophilicity limits their practical application. Current research on cellulose nanofibrils has mainly focused on the industrial production of CNFs, their pretreatment and functional modification and their compatibility with other biomass materials. In the future, with the rapid development of modern science and technology, the demand for biodegradable biomass materials will continue to increase. Furthermore, research on bio-based nanomaterials is expected to advance in the direction of functionalization and popularization.
本综述总结了纤维素纳米纤丝（CNFs）的制备方法及其表面改性的研究进展。此外，基于现有文献全面介绍了纳米纤维素的制备和表面改性。综述重点关注纤维素的机械处理、预处理过程中原纤化纤维的表面改性、纳米纤维素的表面改性以及CNFs的改性及其功能应用。在过去五年中，随着纳米材料研究技术的发展，纤维素纳米纤丝的研究取得了进展。仅关于纳米纤维素的论文数量就增加了六倍。然而，由于其高能耗、高成本以及具有挑战性的工业化生产，纳米纤维素的应用仍然有限。此外，尽管纳米纤丝表现出很强的生物相容性、阻隔性和机械性能，但其高亲水性限制了它们的实际应用。目前对纤维素纳米纤丝的研究主要集中在CNFs的工业化生产、它们的预处理和功能改性以及它们与其他生物质材料的相容性上。未来，随着现代科学技术的快速发展，对可生物降解生物质材料的需求将持续增加。此外，基于生物的纳米材料的研究有望朝着功能化和普及化的方向发展。
