Method for preparing wholetussah silk powder from silk fibers with preserved sericin and fibroin

Abstract

The invention discloses a method for preparing wholetussah silk powder from silk fibers with preserved sericin and fibroin. The method comprises the following steps: putting the silk fibers with preserved sericin and fibroin into a degradation solution for degradation at 80-90 DEG C for 5-12 hours at a constant temperature, and conducting homogenizing with an ultrahigh-pressure homogenizer to obtain the whole tussah silk powder, wherein the degradation solution is composed of oxalic acid, ammonium chloride and ethylenediamine tetraacetic acid, the mass concentration of oxalic acid in the degradation solution is 2%-4%, the mass concentration of ammonium chloride in the degradation solution is 0.2%-0.8%, and the mass concentration of ethylenediamine tetraacetic acid in the degradation solution is 0.01%-0.5%. According to the method, the sericin and the fibroin can be completely utilized to prepare the whole tussah silk powder, so the biological value of tussah silk is kept; and the method is simple in production process, high in preparation rate, friendly to environment and suitable for standardized production.

Description

technical field [0001] The invention relates to the field of silk product processing, in particular to a method for preparing tussah silk powder by using preserved sericin silk fiber. Background technique [0002] Tussah is the most common species of wild silkworm in my country, and it is also one of the characteristic resources of our country. The annual output of tussah cocoons is about 50,000 tons, accounting for more than 80% of the world's total. Tussah silk is composed of sericin and silk fibroin. Sericin is the protein that constitutes the outer tissue of tussah silk fibers, accounting for 15% of the total weight, and plays a role of protection and bonding to the silk fibroin wrapped inside it. [0003] In the prior art, the preparation method of tussah silk powder has at least the following problems: [0004] (1) The production raw material source of existing tussah silk powder is complicated, and raw material is difficult to standardize. [0005] (2) Sericin is al...

AI Technical Summary

Problems solved by technology

[0004] (1) The sources of raw materials for the production of tussah silk powder are complicated, and the raw materials are difficult to standardize

[0005] (2) Sericin is all removed during the production process of existing tussah silk powder

[0006] (3) The production process of existing tussah silk powder can only use silk fibroin as raw material to produce silk fibroin powder

[0007] (4) The production process of existing tussah silk powder is complex and the production rate is low

[0008] (5) The heavy metal content of the existing tussah silk powder is difficult to reach the standard

[0009] (6) The hydrochloric acid method, phosphoric acid method, sulfuric acid method, sodium hydroxide method and other processes used in the production of tussah silk powder have high energy consumption and high pollution