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The cationization of cotton/polyester blend
(Wydawnictwo Politechniki Łódzkiej, 2022) Čorak, Ivana; Tarbuk, Anita; Dekanić, Tihana; Brnada, Snježana; Domljan, Lucija
Cotton cellulose can be cationized with amines and quaternary ammonium compounds in alkaline medium to change fiber surface charge. Such modified cotton adsorbs anionic dyes and auxiliaries due to attractive forces between fiber and compound. Due to crystallinity of polyester fiber, its adsorption is low. Polyester is usually modified by alkaline hydrolysis with cationic compounds as accelerators. For all these reasons, in this paper, the cationization of cotton/polyester blended fabrics was performed. The change of fabric was studied through interface phenomena – zeta potential, moisture management and adsorption of anionic optical brightener. Zeta potential confirmed that the surface charge has been changed. Cationization led to better adsorption of optical brightener and higher capillarity of fabrics.
Influence of yarn fineness on fabric conductivity
(Wydawnictwo Politechniki Łódzkiej, 2022) Schwarz, Ivana; Brnada, Snježana; Kalazić, Ana; Badrov, Tea; Kašaj, Andreja
The application of conductive fabrics is extremely wide and applies primarily to areas such as protective textiles, smart textiles, e-textiles, textile for medical applications, etc. The influence of conductive spun yarn, made from carbon and aramid fibres blend, on fabrics conductivity was investigated. Three types of fabrics, with different fineness and structures of conductive yarns in the weft direction were woven and tested. The relevant properties of the yarns were investigated, as well as the properties of the woven fabrics, which fully contribute to the fabrics conductivity properties. This was confirmed by testing the surface and vertical electrostatic resistance of the fabric, i.e. conductivity.