Esterification of Galactomannan and Polyacid as Paper Strengthening Agent

Abstract

In this paper, eight paper strengthening agents were obtained by the esterification of galactomannan with trimesic acid or butanetetracarboxylic acid. The esterified galactomannan was studied using a ¹³C NMR spectrum, Frontier transform infrared spectroscopy, and elemental analysis. Then, the properties of the paper with esterified galactomannan were also investigated. The results of the ¹³C NMR spectrum and infrared spectroscopic analysis showed that the galactomannan had been successfully esterified with the trimesic acid or butanetetracarboxylic acid. The paper properties with 1% esterified galactomannan were found to be efficiently improved, when compared with the control sample. The polyacid dosages were also found to affect the paper properties. The SEM analysis showed that the esterified galactomannan could effectively increase the inter-fiber bonding in the paper.

KEYWORDS:

• Galactomannan
• trimesic acid
• butanetetracarboxylic acid
• esterification
• paper strengthening agent

Additional information

Funding

This research was financially supported by the National Key R&D Program of China (2016YFD0600803).