Research on the antibacterial and anti-pilling properties of polyester-cotton fabrics by the sol-gel technology

Purpose The purpose of this research is to improve the antibacterial and anti-pilling properties of polyester-cotton fabrics by applying a chitosan-silica coating through sol-gel technology. By optimizing the process parameters, the study aims to enhance the fabrics’ resistance to germs, prevent pilling and maintain their mechanical and functional properties. Design/methodology/approach A transparent sol-gel was obtained by hydrolysis and condensation reactions using silane coupling agent (KH-560), ethyl orthosilicate (TEOS), chitosan and ethanol as precursors and co-solvents, respectively. This sol-gel was employed for the purpose of applying antimicrobial and anti-pilling multifunctional finishes to PC fabrics. An orthogonal experimental design method was employed to optimize the process parameters. The surface morphology and chemical structure of the fabrics were studied using scanning electron microscopy and infrared spectroscopy, both before and after finishing. The fabrics were subjected to testing and analysis to evaluate their antimicrobial and anti-pilling properties, as well as the wearing performance. Findings The best antibacterial and anti-pilling properties are achieved when the volume ratio of TEOS to KH-560 is 1:3, the concentration of chitosan is 10 g/L, the dipping time is 60 min and the water content is 1:2. The fabric exhibits an anti-pilling grade of 4–5 and an antimicrobial rate of 99.99%. The silica/chitosan gel generated a thin and elastic coating on the fiber surface, acting as a protective barrier against external abrasion and enhancing the anti-pilling property by 2–3 grades. The fabric strength increased significantly, while the air permeability remained practically unaltered compared to untreated fabric. Social implications The development of advanced materials such as chitosan-modified silica sols holds significant social implications. These materials, with their enhanced properties, can lead to innovations in healthcare, environmental remediation and energy storage, improving living standards and fostering sustainable development. Their widespread adoption could also stimulate economic growth and job creation, fostering a more resilient society. Originality/value This research introduces an innovative approach using sol-gel technology to enhance the antibacterial and anti-pilling properties of polyester-cotton fabrics. By optimizing the ratio of TEOS to KH-560, chitosan concentration, dipping time and water content, it achieves remarkable results in both performance metrics, offering significant practical value for the textile industry, especially in healthcare and fashion sectors.