Abstract
Abstract Enzymatic hydrolysis on synthetic fibers enhances the hydrophilicity and solves the concerns regarding the environmental issues of textile industry. Lipase hydrolyses ester linkages in polyethylene terephthalate and produces polar hydroxyl and carboxylic groups. The study aims to identify and investigate the effect of enzyme treatment on weight loss and surface modification of polyester fabrics. Also the functional groups present before and after treatment and the effect of enzyme treatment on the improvement of dye uptake are studied. The test indicates that enzymatic process creates less surface damage, weight loss and improved moisture regain, dye uptake, and shear properties.
Highlights
Polyethylene terephthalate (PET) is one of the most commonly used synthetic fiber [1]
If enzymes can hydrolyze ester linkage in PET fabrics, polar hydroxyl (–OH) and carboxyl (– COOH) groups will be formed on the surface of PET fabrics
The enzymatic modification of PET5 implies the limited hydrolysis of backbone ester bonds, which generates new free hydroxyl and carboxyl groups at the polymer surface, leading to increased hydrophilicity of the PET substrate, as shown in Figure 1. 1.1
Summary
Polyethylene terephthalate (PET) is one of the most commonly used synthetic fiber [1]. Improvement in hydrophilicity of polyesters by hydrolysis of ester bonds has been reported [14]. If enzymes can hydrolyze ester linkage in PET fabrics, polar hydroxyl (–OH) and carboxyl (– COOH) groups will be formed on the surface of PET fabrics. Moisture regains and wettability will improve due to the forming of hydrophilic groups on PET fabrics. Hydrolysis of the ester bond creates carboxylic and hydroxyl groups within the polyester fabrics [16]. The degradation http://www.autexrj.com effects on polyester of a monofunctional amine versus alkaline hydrolysis have been studied. The early stages of the reaction were largely confined to the fiber surface and the resulting fiber had modified wetting properties and improved adhesion with the matrix when used in composites [18]
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