Effects of divalent anionic catalysts on cross-linking of cellulose with 1,2,3,4-butanetetracarboxylic acid

Bolin Ji; Cunyi Zhao; Kelu Yan; Gang Sun

doi:10.1016/j.carbpol.2017.10.081

Effects of divalent anionic catalysts on cross-linking of cellulose with 1,2,3,4-butanetetracarboxylic acid

Carbohydr Polym. 2018 Feb 1:181:292-299. doi: 10.1016/j.carbpol.2017.10.081. Epub 2017 Oct 23.

Authors

Bolin Ji¹, Cunyi Zhao², Kelu Yan³, Gang Sun⁴

Affiliations

¹ College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China; Division of Textiles and Clothing, University of California, Davis, CA 95616, USA.
² Division of Textiles and Clothing, University of California, Davis, CA 95616, USA.
³ College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, PR China; National Engineering Research Center for Dyeing and Finishing of Textiles, Donghua University, Shanghai 201620, PR China. Electronic address: klyan@dhu.edu.cn.
⁴ Division of Textiles and Clothing, University of California, Davis, CA 95616, USA. Electronic address: gysun@ucdavis.edu.

PMID: 29253975
DOI: 10.1016/j.carbpol.2017.10.081

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.

Keywords: 1,2,3,4-butanetetracarboxylic acid (PubChem CID: 15560); Anti-wrinkle; Cross-linking; Glutaric acid (PubChem CID: 743); Oxalic acid (PubChem CID: 971); Pyrophosphoric acid (PubChem CID: 1023); Sodium hydroxide (PubChem CID: 14798); Sodium hypophosphite monohydrate (PubChem CID: 23708894); Strength; Succinic acid (PubChem CID: 1110); Tetrahydrofuran (PubChem CID: 8028); Two-dimensional correlation spectroscopy; Valence.