Amylose content and pre-freezing regulate the structure and oil absorption of polyelectrolytes-based starch cryogel. (15th February 2023)

• Record Type: Journal Article
• Authors: Jiang, Yi; Junejo, Shahid Ahmed; Jia, Xiangze; Zhang, Bin; Fu, Xiong; Huang, Qiang
• Is Part Of: Carbohydrate polymers. Volume 302(2023)
• Publication Date: 2023-02-15
• Subjects: Starch-fatty acid salts complex -- Starch-based cryogels -- Polyelectrolytes -- Amylose content -- Pre-freezing -- Oil absorption; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2022.120386
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: Starch cryogel is a potential material for oil absorption. This study provided a facile and convenient polyelectrolyte-based preparation strategy of starch cryogel, in which the structural properties of the cryogel were regulated by amylose content and pre-freezing without long-time retrogradation. Sodium laurate was used as a guest model to form starch-fatty acid salt complex (polyelectrolyte). The amount of amylose content and sodium laurate added led more polyelectrolytes, significantly increased V-type crystallinity from 3.72 % to 22.40 % and complexing index from 4.32 % to 28.48 %. As the uniform pore structure improved the oil absorption ability of starch cryogel, the starch cryogel prepared by waxy maize starch followed by quick pre-freezing showed the highest specific surface area (9.87 m 2 /g) and oil absorption capacity (32.94 g/g). Our findings suggest that polyelectrolyte properties have great potential in the preparation of starch-based cryogels, which could be applied in the design of novel starch-based porous materials.