Preparation Of HBP-HTC And Its Modification On B.mori Silk

Hyperbranched polymers have received much attention due to their unique chemical and physical properties. The purpose of present research is to modify B. mori silk and explore the application of hyperbranched polymers in textile. So 2, 3-epoxypropyl trimethylammonium chloride (EPTAC) was applied to the modification of terminated groups of amino-terminated hyperbranched polymer (HBP-NH2) and 2-Hydroxypropyltrimethylammonium chloride amino-terminated hyperbranched polymer (HBP-HTC) was synthesized successfully. The HBP-HTC was applied to the modification of B. mori silk to enhance the dyeability of silk fabric and endow the silk fabric with excellent antibacterial property.HBP-NH2 reacted with EPTAC in ambient temperature rapidly, and series of HBP-HTC which has different amount of quaternary ammonium salt groups was synthesized by controlled the ratio of EPTAC and HBP-NH2. HBP-HTC has a wide molecular weight distribution and good thermal stability. The aqueous solution of HBP-HTC presents alkaline, and has UV absorption characteristic and excellent antibacterial property.The optimum technology of modification was showed as follows: B.mori silk fabric was treated with 5g/L HBP-HTC aqueous solution at 100°C for 3 min without adjusting the pH value. The modified silk fabric has the higher dye uptake of reactive dyes in absence of the electrolytes and can be dyed in neutral dyebath at low temperature with acid dyes. They had similar level-dyeing property and fastness compared to the conventional dyeings.The HBP-HTC modified silk fabric has excellent antibacterial property and durability. Modification with HBP-HTC can also enhance its UV protective property, hygroscopicity and water absorbility. Meanwhile, the modification has no influence on the strength and whiteness of silk fabric.