Effects of divalent anionic catalysts on cross-linking of cellulose with 1, 2, 3, 4-butanetetracarboxylic acid. (1st February 2018)

• Record Type: Journal Article
• Authors: Ji, Bolin; Zhao, Cunyi; Yan, Kelu; Sun, Gang
• Is Part Of: Carbohydrate polymers. Volume 181(2018)
• Page Start: 292
• Page End: 299
• Publication Date: 2018-02-01
• Subjects: 1, 2, 3, 4-butanetetracarboxylic acid (PubChem CID: 15560) -- Sodium hypophosphite monohydrate (PubChem CID: 23708894) -- Pyrophosphoric acid (PubChem CID: 1023) -- Sodium hydroxide (PubChem CID: 14798) -- Oxalic acid (PubChem CID: 971) -- Succinic acid (PubChem CID: 1110) -- Glutaric acid (PubChem CID: 743) -- Tetrahydrofuran (PubChem CID: 8028); Anti-wrinkle -- Cross-linking -- Valence -- Strength -- Two-dimensional correlation spectroscopy; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2017.10.081
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Divalent PPA anions showed more efficient catalysis than monovalent ones. 2Dcos was used to analyze the reactions between BTCA and cellulose. Crosslinking and degradation of cellulose by BTCA are competing reactions. The pH of BTCA bath played a key role in cotton finishing with PPA as the catalyst. Fabrics treated at pH ≤ 3.2 presented good durability and satisfying strength. Abstract: 1, 2, 3, 4-Butanetetracarboxylic acid (BTCA) can efficiently esterify cellulose with pyrophosphoric acid (PPA) as a catalyst to remove protons of reaction intermediates. However, valence and relative concentration ratio (RCR) of catalyst anions correlating to pH of finishing bath played a critical role in the reactions. Results here indicated that wrinkle recovery angle, tensile strength retention and ester absorbance of fabrics treated at pH of 2.8 showed higher values. It was a competing reaction for BTCA molecules to esterify or depolymerize cellulose. Importantly, divalent PPA anions were more efficient than monovalent ones in catalyzing the esterification between anhydrides and cellulose, which was confirmed by FTIR results and two-dimensional correlation spectroscopy analyses and by the RCRs of PPA anions and their changing rates versus pH. Furthermore, the higher catalytic efficiency of divalent anions was proved by the selected model catalysts. Meaningfully, the fabrics treated at pH ≤ 3.2 presented good durability.