Abstract
The microfiber synthetic leather base was pretreated by sulfuric acid, and then hydrolyzed collagen was grafted onto the pretreated base, in which tanning F-90 was used as cross-linking agent. By the method of single-factor experimental design, F-90 and hydrolyzed collagen dosages were optimized. The change in dye uptake, surface chroma, and dry-rubbing and wet-rubbing fastness properties were discussed. The results showed that when F-90 dosage was 8% and hydrolyzed collagen dosage was 15%, the dyeing properties of modified base improved greatly. Compared with the pretreated base, it was found that the carboxyl content in modified base increased by 186.26% and the amino content increased by 126.21%. The dye uptake improved by 37.74%, the surface chroma deepened, and the dry-rubbing and wet-rubbing fastness improved. The water vapor permeability improved by 64.53% and the hygroscopicity improved by 50.89%. The mechanical properties also had different degrees of enhancement. Furthermore, the base before and after being modified were characterized by SEM-EDS, AFM, TGA and contact angle respectively. The results showed that the loose degree of fiber increased obviously, the relative average roughness decreased, the thermal property also decreased slightly and the hydrophilicity was enhanced.