Effect of structure features of polysaccharides on properties of dialdehyde polysaccharide tanning agent. (1st December 2018)

• Record Type: Journal Article
• Authors: Ding, Wei; Wang, Ya-nan; Zhou, Jianfei; Shi, Bi
• Is Part Of: Carbohydrate polymers. Volume 201(2018)
• Page Start: 549
• Page End: 556
• Publication Date: 2018-12-01
• Subjects: Polysaccharide -- Crystallinity -- Dialdehyde polysaccharide -- Molecular weight -- Tanning; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2018.08.111
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Structure features of polysaccharide (PS) had great impacts on properties of DAP. Lower Mw and linear chain structure of PS resulted in more aldehyde groups of DAP. Lower crystallinity and β-(1→4) glycosidic bond favored the degradation of PS. DAP prepared from β-(1→4)-linked amorphous SA/TG had better tanning performances. Abstract: Sodium alginate (SA), tara gum (TG), starch (ST) and cyclodextrin (CD) were oxidized to dialdehyde polysaccharides (DAPs) using equivalent sodium periodate. The effects of polysaccharide structure features on aldehyde group content, molecular size and tanning performance of DAPs were investigated. Each DAP had abundant aldehyde groups (>7 mmol/g) for fur tanning in the experimental conditions, and DAP with higher aldehyde group content was obtained when polysaccharide with lower molecular weight and linear chain was used. Lower crystallinity and β-(1→4) glycosidic linkage of polysaccharide benefited its degradation. Compared with dialdehyde ST (Mw >150, 000) and dialdehyde CD (Mw <500), DAPs prepared from β-(1→4)-linked amorphous SA and TG had moderate molecular sizes (Mw 15, 000–30, 000) and exhibited satisfactory penetrability and crosslinking reactivity in collagen fiber network, and thus performed more favorable tanning properties in terms of higher shrinkage temperature and whiteness of fur. This suggests the suitability of β- (1→4)-linked amorphous polysaccharides for preparing dialdehyde tanning agents.