The use of starch-based polymers instead of synthetic polymers for sizing applications

In this study, it is aimed to use modified corn starch instead of synthetic polymer polyvinyl alcohol used in textile industry. For this reason, fisrtly the cross-linked starch was synthesized, secondly the amphoteric starch was formed by cationization of the cross-linked starch, and lastly the carboxymethyl starch was synthesized with the reaction of the amphoteric starch with ClCH2COONa. In this context, modified starch with 18 different DS values were obtained. Viscosity profiles of cross-linked starches, N% values of cationic modified starches and the functional were analyzed qualitatively by analyzing the FT-IR spectrums. The modified starch solutions were used to size the 40/1 Nm cotton yarn and the tensile strength, and the elongation values of the boiled 40/1 Nm cotton yarns were measured on the TA.XT plus texture analyzer. According to the measurements, it was observed that as the cross link ratio of the starch increased, the breaking strength increases, and also the breaking elongation increased with the increasing cationic charge value and carboxymethyl DS value. The tensile strength and tensile elongation values of some of the yarns prepared with modified starches were found to be above the tensile strength and tensile elongation values (13,77 cN / Tex, 3,54 cm) of the yarns prepared with PVA solution, therefore these yarns can be used instead of the yarns sized with PVA.