Flame-retardant pure silk and preparation method thereof

Abstract

The invention discloses a flame-retardant pure silk and a preparation method of the flame-retardant pure silk. The preparation method comprises the following steps of: firstly, soaking the pure silk into a low molecular weight chitosan solution, washing by using deionized water, drying the washed pure silk, then soaking the dried pure silk into a sodium phytate solution, then taking the pure silk out, washing the pure silk with deionized water and then drying; and repeating the steps till the flame-retardant pure silk is obtained. A flame retardant comes from natural animals and plants, is nontoxic and belongs to an ecological type flame-retardant finishing agent; the flame-retardant pure silk is prepared by adopting an electrostatic self-assembling technology at room temperature, the preparation method is simple to operate and accords with an environment-friendly requirement, energy is saved and emission is reduced; and the prepared flame-retardant pure silk has a favorable flame-retardant effect.

Description

technical field [0001] The invention belongs to the technical field of textile finishing, and in particular relates to a method for flame-retardant finishing of textiles, especially real silk, and the flame-retardant real silk obtained therefrom. Background technique [0002] Fires caused by textiles account for approximately 20 percent of residential fires, but account for 50 percent of all fire deaths. All countries have legislated to put forward corresponding flame retardant performance requirements for textiles used in different fields. [0003] Silk fiber, known as the "Fiber Queen", is widely used in clothing and decorative materials due to its health care, comfort, noble and gorgeous appearance. The main products are pajamas, ties, silk scarves, bedding, wall coverings, decorative paintings, carpets and so on. my country is a big silk-producing country. The output of raw silk and gray silk accounts for more than 70% and 45% of the world's total output respectively, ...

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Problems solved by technology

[0005] "Printing and Dyeing" magazine, No. 11, 2005, research on the finishing of silk with organic phosphine flame retardants discloses a method for flame retardant finishing of real silk fabrics, using N-hydroxymethyl-3 (dimethoxyphosphono ) acrylamide as flame retardant, etherified melamine resin as crosslinking agent, using rolling baking and washing technology to carry out flame retardant finishing on real silk fabrics. After finishing, the fabric has good flame retardant performance, but the fabric feels hard and its strength decreases. There are different degrees of formaldehyde release; Chinese invention patent application CN1958936A discloses a method of using vinyl phosphate ester to graft silk for flame retardant finishing. This modification can obtain good flame retardant performance, but the amount of flame retardant added is large. Moreover, the amount of smoke generated during the combustion process is large; Chinese invention patent application CN102828404A discloses a method for the flame-retardant treatment of vinyl phosphoramide on silk. Due to the synergistic effect of phosphorus and nitrogen in the molecule, it can be achieved with a small amount of addition. Achieve good flame retardant performance; Chinese invention patent application CN102828408A discloses a phosphorus-silicon compound system for flame-retardant treatment of real silk.

[0006] It can be seen from the above that the flame retardants used in the prior art are all synthetic chemicals. Some flame retardants release formaldehyde, and some have a large amount of smoke in the combustion process, which is harmful to the human body; although the newly disclosed synthetic flame retardants The toxicity to the human body is unknown, but some intermediates and solvents used in the preparation process are toxic to the human body and will pollute the environment

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