# Influence of Cross-Linkers on the Wash Resistance of Chitosan-Functionalized Polyester Fabrics

## TL;DR

This study examines how cross-linkers affect the durability of chitosan on polyester fabrics after washing.

## Contribution

The study reveals that chitosan on polyester is more wash-resistant without cross-linkers, contrary to expectations.

## Key findings

- Polyester fabrics with chitosan but no cross-linkers showed better wash resistance.
- Cross-linkers like BTCA and HEMA did not improve chitosan retention during washing.
- Alkaline hydrolysis was used to enhance chitosan-polyester interaction.

## Abstract

This study investigates the wash resistance of polyester fabrics functionalized with chitosan, a biopolymer known for its biocompatibility, non-toxicity, biodegradability and environmentally friendly properties. The interaction of chitosan with synthetic polymers, such as polyester, often requires surface treatment due to the weak natural affinity between the two materials. To improve the interaction and stability of chitosan on polyester, alkaline hydrolysis of the polyester fabric was used as a surface treatment method. The effectiveness of using cross-linking agents 1,2,3,4-butane tetracarboxylic acid (BTCA) and hydroxyethyl methacrylate (HEMA) in combination with ammonium persulphate (APS) to improve the stability of chitosan on polyester during washing was investigated. The wash resistance of polyester fabrics functionalized with chitosan was tested after 1, 5 and 10 washes with a standard ECE detergent. Staining tests were carried out to evaluate the retention of chitosan on the fabric. The results showed that polyester fabrics functionalized with chitosan without cross-linkers exhibited better wash resistance than the fabrics treated with crosslinkers.