Abstract
In this study, we used 3-chloro-2-hydroxypropyltrimethylammonium (CHPTAC) chloride to cationize alginate fibers to obtain dyeable modified alginate fibers. After modification, the surface of the alginate fibers was positively charged. Direct dyes can be used to dye the modified alginate fibers without adding salt. The results of FTIR and XRD tests showed that there was no significant change in the structure of alginate fibers after the modification process. The results of XPS tests showed that CHPTAC was successfully combined with alginate fibers. The SEM, single-fiber strength, and thermal stability analysis results indicated that both the modification and dyeing processes did not affect the strength and flame-retardant properties of alginate fibers. In addition, the modified fibers have good dyeability and color fastness. This process presents a novel method for dyeing alginate fibers without using salt, and it involves low cost and simple steps.
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