Flame-retardant silk and its preparation method and application

Abstract

The invention discloses a method for preparing an anti-flaming silk. The method comprises the following steps: preparing dioscorea cirhosa extract; utilizing a dipping adsorption method to absorb thecondensed tannin in the dioscorea cirhosa extract to a silk fabric, thereby acquiring a dioscorea cirhosa extract modified silk fabric; utilizing the dipping adsorption method to absorb a polypropylene imine dendrimer to the dioscorea cirhosa extract modified silk fabric under a weak alkaline condition, thereby acquiring the anti-flaming silk. According to the invention, the cross-linking reactionof the condensed tannin in the dioscorea cirhosa extract and the polypropylene imine dendrimer on the silk fabric under the weak alkaline condition is utilized to effectively promote the flame resistance of the silk fabric. The silk fabric finished according to the method provided by the invention has a durable anti-flaming function.

Description

technical field [0001] The invention relates to the technical field of textile finishing, in particular to a method for improving the flame-retardant performance of silk, flame-retardant silk and applications thereof. Background technique [0002] Nearly half of the fires in the world are caused by the burning of textiles, and the fire fatalities caused by textiles and interior decorations rank first. Silk is a natural protein fiber, which has the characteristics of moisture absorption, breathability, softness and smoothness, soft luster, elegance and gorgeousness, and comfortable wearing, so it is very popular and loved by people. Silk fiber is often widely used to make high-grade bed textiles, interior decoration fabrics, carpets, curtains, wall coverings and textile artworks, etc. These silk products have certain requirements for flame retardancy. Although silk itself has a certain flame retardancy compared with cellulose fiber, its limiting oxygen index is generally onl...

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Problems solved by technology

[0004] Chinese invention patent CN201710161634.9 discloses a method of dyeing and finishing protein fibers with phytic acid. The natural product phytic acid is used as an environmentally friendly dyeing accelerator and flame retardant finishing agent at the same time. The processed protein fibers have good Flame retardant performance (limiting oxygen index is as high as 30%, and the damage length during vertical burning is less than 15cm, which can meet the requirements of B1 flame retardant performance in my country's "Flame Retardant Decorative Fabrics"), but the protein fiber products treated with phytic acid alone The washing durability of the flame retardant function is not good (Xibiao Zhang, Xian-You Zhou, Xian-Wei Cheng, Ren-ChengTang. Phytic acid as an eco-friendly flame retardant for silk / wool blend: A comparative study with fluorotitanate and fluorozirconate. Journal of Cleaner Production, 2018, 198:1044-1052)

Chinese invention patent 201710568421.8 discloses a method for durable flame-retardant finishing of silk fabrics by using a mixture of water extract of yam yam water extract, citric acid, sodium citrate, and sodium formate. After high-temperature baking, washing, and drying, a durable flame-retardant silk fabric can be obtained. The limiting oxygen index of the flame-retardant silk fabric can reach 27-28%, and the damage length is less than 15cm when it is burned vertically. The limiting oxygen index of flame-retardant silk fabrics can still reach 27-28%, and the damage length is still less than 15cm during vertical burning; compared with unfinished silk fabrics, the limiting oxygen index of flame-retardant silk fabrics is still limited and cannot reach 30%.

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