Tannic Acid-Induced Gelation of Aqueous Suspensions of Cellulose Nanocrystals

被引：3

作者：

Lin, Fengcai ^{[1
]}

Lin, Wenyan ^{[1
]}

Chen, Jingwen ^{[1
]}

Sun, Chenyi ^{[1
]}

Zheng, Xiaoxiao ^{[1
]}

Xu, Yanlian ^{[1
]}

Lu, Beili ^{[2
]}

Chen, Jipeng ^{[1
]}

Huang, Biao ^{[2
]}

机构：

[1] Minjiang Univ, Coll Mat & Chem Engn, Fujian Engn & Res Ctr New Chinese Lacquer Mat, Fuzhou 350108, Peoples R China

[2] Fujian Agr & Forestry Univ, Coll Mat Engn, Fuzhou 350108, Peoples R China

来源：

POLYMERS | 2023年 / 15卷 / 20期

基金：

中国国家自然科学基金;

关键词：

cellulose nanocrystals; tannic acid; hydrogen bonding; hydrogel; HYDROGELS; NANOCELLULOSE; NANOPARTICLES; RHEOLOGY; EXTRACTION;

D O I：

10.3390/polym15204092

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Nanocellulose hydrogels are a crucial category of soft biomaterials with versatile applications in tissue engineering, artificial extracellular matrices, and drug-delivery systems. In the present work, a simple and novel method, involving the self-assembly of cellulose nanocrystals (CNCs) induced by tannic acid (TA), was developed to construct a stable hydrogel (SH-CNC/TA) with oriented porous network structures. The gelation process is driven by the H-bonding interaction between the hydroxyl groups of CNCs and the catechol groups of TA, as substantiated by the atoms in molecules topology analysis and FTIR spectra. Interestingly, the assembled hydrogels exhibited a tunable hierarchical porous structure and mechanical moduli by varying the mass ratio of CNCs to TA. Furthermore, these hydrogels also demonstrate rapid self-healing ability due to the dynamic nature of the H-bond. Additionally, the structural stability of the SH-CNC/TA hydrogel could be further enhanced and adjusted by introducing coordination bonding between metal cations and TA. This H-bonding driven self-assembly method may promote the development of smart cellulose hydrogels with unique microstructures and properties for biomedical and other applications.

引用

页数：14