In this article, an innovative method was put forward to evaluate the endurance of nano ZnO finished fabrics to sweat. The atomic absorption spectrophotometer was used to determine the concentration of zinc in immersion liquor, and at the same time, SEM experiments and biocidal tests were chosen to characterize the antibacterial performance. Half-life time (t 1/2 ) of zinc concentration on the fabric was introduced to evaluate the durability to sweat. The results indicated that nano ZnO antibacterial cotton fabric was relatively sensitive to acid artificial sweat while durable in saline or alkaline solution, the t 1/2 exceeded 3000 min in them. SEM characterization and biocidal tests showed the same behavior.
The equilibrium sorption of ten cationic dyes by porous and regular acrylic fibers has been investigated. The data have been interpreted by a simple Donnan approach, based on the assumption that there are two different types of acidic groups in these fibers. The ionic distribution coefficients KD for the dyes and the fibers were calculated. These coefficients provide an indirect measure of the “affinity” of the dyes for the fibers. The values of KD have been discussed in relation to the structures of the dyes and fibers, and in relation to the effects of salts, pH, and temperature.
A series of sols were prepared from selected silane derivatives. When dyed cotton was treated with such sols, the colloidal particles linked together to form a network on the fibre. Thus the direct dye was fixed on cotton and the wash fastness was enhanced. This new method, based on the sol–gel process, was rudimentarily proved to be an effective way to improve the wash fastness of direct dyes on cotton without essential loss of properties, such as handle and strength of the fabric.
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