Dyeing performances of ramie fabrics modified with an amino-terminated aliphatic hyperbranched polymer

• Published in: Cellulose (London) 2015-04, Vol.22 (2), p.1401-1414
• Main Authors: Wang, Guo-Wei, Chen, Bin, Zhuang, Ling-Hua, Yun, Kang, Guo, Jia-Rong, Wang, Yan, Xu, Bin
• Format: Article
• Language: English
• Subjects: Aliphatic compounds; Bioorganic Chemistry; Cellulose; Ceramics; Chemistry; Chemistry and Materials Science; Composites; Crystal structure; Crystallinity; Dyeing; Epichlorohydrin; Ethanol; Fabrics; Glass; Hydrochloric acid; Light fastness; Mercerization; Natural Materials; Organic Chemistry; Original Paper; Parameter modification; Physical Chemistry; Polymer Sciences; Polymers; Rubbing; Sustainable Development; Tear strength; Tensile strength; Textile composites; Titration; Warp; Weft
• ISSN: 0969-0239; 1572-882X
• DOI: 10.1007/s10570-015-0558-6

An amino-terminated aliphatic hyperbranched polymer (HBP-NH 2 ) was used to modify ramie fabric. The molecular weight of HBP-NH 2 was established by GPC. HBP-NH 2 structure might represent as BA 4 BA 3 BA 3 (third generation). The total amine value, secondary amine value and primary amine value of HBP-NH 2 were 291.59, 210.14 and 81.45 mg/g respectively with hydrochloric acid—ethanol titration method. The unmodified and modified ramie fabrics were characterized by XRD and FE-SEM. XRD results showed a transformation of crystalline structure from ramie cellulose I to cellulose II allomorph during mercerization and epichlorohydrin modification, and the crystalline structure of cellulose II maintained with obvious crystallinity index increase after HBP-NH 2 modification. Nitrogen content of HBP-NH 2 modified fabrics were 1.25–2.61 %. Cationization degree (D C ) of HBP-NH 2 modified ramie fabrics were 4.41–9.40 %. C.I. Reactive Red 2 was applied to study the dyeing performance of modified fabrics. The modification parameters were optimized as 50 °C for 5 h when the concentration of HBP-NH 2 was 8 g/L. K/S value and dye uptake of modified fabric was 23.64 and 85.6 % respectively under optimal modification conditions. The washing, rubbing and light fastness of modified ramie fabrics were acceptable. The tensile strength and tear strength of HBP-NH 2 modified ramie fabrics were lower than those of unmodified fabrics. The warp, weft of tensile and tear strength retention of modified fabrics were between 85.23 and 87.50 %. The HBP-NH 2 modification mechanism and dyeing mechanism on ramie fabric were suggested.