Studies on the Distribution of Cross-Links in Wrinkle-Resistant Cottons

Abstract

The properties of untreated cotton, cotton acetylated to various degrees, and partially deacetylated cottons were examined before and after cross-linking treatments to obtain information on the distribution of cross-links in wrinkle-resistant cottons. The study showed that the cellulosic hydroxyl groups that are most reactive with dimethylol ethyleneurea are acetylated first. Similarly, deacetylation released the most reactive groups first. Electron micrographs showed that interlamellae cross-links (cross-links between growth layers) in the cotton fiber occur when there is improvement in dry crease recovery, but the interlamellae cross-links are not essential for improvement in wet crease recovery. Wet recovery (without dry) was imparted by intermicrofibril crosslinks.