Synthesis Of The Hyperbranched Polymer (HSDA) And Their Application In Functional Modification Of Cotton

Cotton, a most important natural textile, is widely used in clothing fields. However, in order to promote dyeability of cotton, large quantities of salt are needed when dyeing cotton fabric with reactive dyes, which result in heavy environment pollution. In addition, cause to the excellent moisture absorption of cotton, bacteria grows and reproduce easily, and lead to a mildew smell. The purpose of the present work is to synthesis a water-soluble hypebranched polymer (HSDA), and then applies it to functional modification of cotton fabric to improve its dyeability, reduce salt in its dying process. Futher more, synthesising a silver colloidal solution based on HSDA, with which the cotton would show antibacteria.The HSDA was synthesis from dodecylamine, methyl acrylate and tetraethylenepentamine by polycondensation. Its possible structure was characterized by Fourier transform infrared spectrophotometer (FTIR) and Nuclear magnetic resonance spectroscopic (1H-NMR,13C-NMR). Dissolution characteristic and UV absorbing capability of the HSDA was also studied for their application in textile fields.In order to improve the dyeability of the cotton fabric with reactive dyes, the cotton fabric was pretreated with HSDA aqueous solution directly. The dyed HSDA pretreated cotton fabric exhibited similar K/S value even in the absence of electrolyte when dyed with some reactive dyes. The washing fastness, rubbing fastness and leveling properties of the dyed modified cotton in salt-free dying were also good in comparison to the dyed cotton in conventional dying. It also preliminary study the antibacterial of HSDA silver colloidal solution and its finished cotton.