Characterization of semi-interpenetrating hydrogel based on Artemisia sphaerocephala Krasch Polysaccharide and cellulose nanocrystals crosslinked by ferric ions. (May 2023)

• Record Type: Journal Article
• Authors: Li, Dan; Liu, Ning; Yao, Xiaolin; Gou, Qingxia; Yue, Jianxiong; Yang, Dan; Chen, Xiaoyu; Xiao, Man
• Is Part Of: Food hydrocolloids. Volume 139(2023)
• Publication Date: 2023-05
• Subjects: Artemisia sphaerocephala Krasch polysaccharide -- Cellulose nanocrystals -- Iron ions -- Semi-interpenetrating network -- Hydrogel; Hydrocolloids -- Periodicals; Food additives -- Periodicals; Colloïdes -- Périodiques; Aliments -- Additifs -- Périodiques; Colloids; Food additives; Periodicals; Electronic journals; 664.06
• DOI: 10.1016/j.foodhyd.2023.108596
• Languages: English
• ISSNs: 0268-005X

Abstract

Abstract: Hydrogels are important bionic materials that can be used in a wide variety of biomedical applications. Artemisia sphaerocephala Krasch polysaccharide (ASKP) has been demonstrated to be crosslinked by ferric ions to form three-dimensional network. Here, a semi-interpenetrating network (semi-IPN) hydrogel based on ASKP and cellulose nanocrystals (CNC) crosslinked by ferric ions was fabricated and the effect of specific rod-like CNC was evaluated. It was found that the network of ASKP-Fe 3+ hydrogel incorporated by CNC became denser along with the decreased pore diameter and the thickened pore wall. ASKP/CNC-Fe 3+ hydrogel displayed an enhanced gel strength and water holding capacity. The dominant interaction of ASKP and CNC was hydrogen bonds proved by FTIR and QCM-D. Additionally, the elasticity of the semi-IPN hydrogel significantly increased along with the decrease of platform height in MSD curves based on particles tracking. These results may be caused by the fact that the rod-shaped CNC can be entangled with ASKP and prone to induce the orderly extension of ASKP chains, resulting in more hydroxyl and carboxyl groups exposed to be crosslinked with ferric ions. What's more, the stiff CNC located on the pore wall of ASKP-Fe 3+ hydrogel can also strengthen the rigidity of network. Thus, this study suggests a new strategy to improve the properties of ASKP based hydrogel, and can be developed as a carrier to deliver iron ions. Graphical abstract: Image 1 Highlights: The ASKP-Fe 3+ based semi-IPN hydrogel was fabricated by incorporation of rod-like CNC. The rod-like CNC induced the extension of ASKP chain and filled in the gap of ASKP-Fe 3+ network. The gel properties were improved by interpenetrating of CNC in ASKP-Fe 3+ network.