20.500.12556/RUL-154130 Formation of pH-responsive cotton by the adsorption of methyl orange dye The interest in pH-sensitive textile sensors is growing in the global market. Due to their low-cost production, mechanical stability, flexibility, air-permeability, washability, and reusability, they are more suitable than electronic sensor systems. The research tailored the pH-sensitive textile by applying the pH indicator methyl orange to the cotton fabric during conventional dyeing. Adsorption of methyl orange dye to cotton fabric is hindered due to electrostatic repulsive forces between dye anions and negatively charged cotton fibre. To overcome this problem, chemical modification of cotton fabric using a commercial product was performed. The pH sensitivity of the dyed fabric was spectrophotometrically evaluated. In addition, the colour fastness of dyed cotton fabric to washing, light, hot pressing and rubbing was investigated according to valid SIST EN ISO standards. The research results show that the pH-responsive cotton fabric was successfully developed. The chemical modification of cotton fabric is crucial for the increased adsorption of methyl orange dye. The halochromic effect was not only perceived spectrophotometrically but also with the naked eye. The developed halochromic cotton fabric showed poor colour fastness to light and good colour fastness to hot pressing and rubbing, while no significant improvement in colour fastness to washing was observed, even though the fabric was after-treated with a cationic fixing agent. Higher adsorption of the methyl orange dye to the cotton fabric during the dyeing process leads to less wastewater pollution after dyeing with unfixed dye and, thus, a reduction in wastewater treatment costs. pH sensitivity methyl orange conventional dyeing cotton colour fastness pH odzivnost metiloranž konvencionalno barvanje bombaž barvne obstojnosti true false true Angleški jezik Slovenski jezik Članek v reviji 2024-01-26 09:20:29 2024-01-26 09:20:30 2024-01-27 03:58:18 0000-00-00 00:00:00 2023 0 0 15 str. iss. 7, art. 1783 Vol. 15 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 677 2073-4360 10.3390/polym15071783 150732291 polymers-15-01783.pdf polymers-15-01783.pdf 1 FF6241989777CDBAEE07BFAE5384DCE8 8fd56acea34dbbfe4c302f6ac73e3797cfa31b9c4589d4eb203d2ed0fdff7e44 ec9a5343-bc26-11ee-9241-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=180327 https://www.mdpi.com/2073-4360/15/7/1783 1 c5280633-bc23-11ee-9241-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=180325 Naravoslovnotehniška fakulteta 0 0 0