关键词: PDMAPS, 棉织物, 改性方法, 反聚电解质效应, 力学性能

Abstract: "Cotton fabrics, as a natural textile material, are widely sourced and inexpensive, occupying an important position in the textile field. However, with the deep integration and development of modern technology and smart textiles, the performance requirements for cotton fabrics have gradually shifted from initial economic practicality to functional diversification. Hydrogel materials are highly absorbent porous materials with a three-dimensional network structure formed by one or more polymer molecules through physical or chemical crosslinking. Due to their diverse chemical compositions and polymeric topological structures, hydrogels exhibit a rich array of functional properties, offering extensive application potential in fields such as agriculture, environmental governance, healthcare, and daily necessities. For example, zwitterionic hydrogels contain oppositely charged ionic groups, often responding to stimuli such as temperature and salt, and demonstrating high hydration, which prevents the adhesion of bacteria, proteins, and other substances to the material surface. They show promising application prospects in many fields such as sensors, antifouling coatings, gel electrolytes, and membrane separation materials. By compounding cotton fabrics with PDMAPS hydrogels, the singularity of cotton fabrics' performance will be improved, endowing them with the properties of PDMAPS hydrogels and broadening their range of applications. Currently, hydrogels are mainly compounded with fabrics through methods such as immersion, graft modification, and lamination. The preparation process often involves complex surface treatments like chemical graft modification, making it difficult to apply on a large scale. In addition, it is challenging to precisely control the content of functional components during the preparation process, which can easily lead to the destruction of the fabrics' original structure and result in an imbalance between the structure and performance of the modified fabrics. Therefore, it is of great significance to achieve precise control of functional component content by simple method to obtain gel-modified fabrics with excellent properties and wide applications. Based on the above considerations, this paper adopts a simple initiator-monomer stepwise drying method to prepare gel-modified fabrics. Specifically, pretreated cotton fabrics are immersed in a solution containing a certain amount of gel precursor. As the solvent evaporates, the precursor solution is fully absorbed into the yarn interior through the wicking effect of the yarn. Subsequently, the precursor undergoes in-situ polymerization and combines with the fabric skeleton, resulting in PDMAPS-modified fabrics. By varying the monomer dosage, the structure and properties of the modified fabric can be regulated. The effects of monomer content on pore architecture, air permeability, swelling ratio and mechanical properties are systematically studied, which provides certain valuable reference for the preparation and functional optimization of multi-functional cotton fabrics, and lays a solid foundation for their applications in fields such as flexible wearable sweat sensors and multi-functional textiles."

Key words: "PDMAPS, cotton fabrics, modification methods, anti-polyelectrolyte effect, mechanical properties "