Abstract
An amino-terminated aliphatic hyperbranched polymer (HBP-NH2) was used to modify ramie fabric. The molecular weight of HBP-NH2 was established by GPC. HBP-NH2 structure might represent as BA4BA3BA3 (third generation). The total amine value, secondary amine value and primary amine value of HBP-NH2 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-NH2 modification. Nitrogen content of HBP-NH2 modified fabrics were 1.25–2.61 %. Cationization degree (DC) of HBP-NH2 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-NH2 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-NH2 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-NH2 modification mechanism and dyeing mechanism on ramie fabric were suggested.
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Abbreviations
- HBP-NH2 :
-
Amino-terminated aliphatic hyperbranched polymer
- GPC:
-
Gel permeation chromatography
- DC :
-
Cationization degree
- XRD:
-
X-ray diffraction
- FT-IR:
-
Fourier transform infrared spectrometer
- FE-SEM:
-
Field emission scanning electron micrograph
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Acknowledgments
This work was supported by Natural Science Foundation of Jiangsu Province (No. BK2011799, No. 20140939) and the specialized research fund for the Doctoral Program of Higher Education of China (No. 20113221120006). The authors also gratefully appreciate the support from Jiangsu Overseas Research & Training Program for University Prominent Young & Middle-aged Teachers and Presidents, and Jiangsu Students Innovation and Entrepreneurship Training Program (No. 2012JSSPITP3054 and No. 201413905004Y).
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Wang, GW., Chen, B., Zhuang, LH. et al. Dyeing performances of ramie fabrics modified with an amino-terminated aliphatic hyperbranched polymer. Cellulose 22, 1401–1414 (2015). https://doi.org/10.1007/s10570-015-0558-6
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DOI: https://doi.org/10.1007/s10570-015-0558-6