Abstract:

Cotton fabric was treated by using butane tetra carboxylic acid (BTCA) as finishing agent, sodium hypophosphite (SHP) and non-phosphorus HD-SP as hybrid catalyst. The effect of hybrid catalyst on the pH value and the anti-wrinkle property of treated fabric were investigated. The function mechanism of hybrid catalyst was also studied by Fourier transform infrared spectroscopy (FTIR) and ion relative concentration calculation. The results indicated that the pH value of fabric which was treated by hybrid catalyst can meet the requirement of GB 18401-2010, and consequently the washing process can be saved. Besides, the anti-wrinkle property of fabric treated by SHP 10 g/L and HD-SP 20 g/L as hybrid catalyst was comparable with that of fabric treated with SHP 16 g/L. However, the dosage of SHP can be decreased by 37.5%. FTIR analysis showed that the amount of ester bonds on fabric treated by hybrid catalyst was as same as that of fabric treated by SHP alone. Besides, more carboxyl groups were converted to carboxylate by hybrid catalyst according to ion relative concentration calculation, so that the pH value of treated fabric was increased.