Enzyme Treatment Technology Applied To Extraction Of Mulberry Fiber

With increasingly concerned of ecological environment and energy issues, people paid more and more attention on either the production processes of raw materials or the use of products. This subject of enzyme treatment technology is applied to the extraction experiment of mulberry fiber. This issue carried out a series of research in extraction method and condition of mulberry fiber on the basis of mulberry fiber's material content. What's more, comparing with degumming traditional, it analyzed different extraction methods and conditions impacting on the structure and performance of mulberry fiber. It provides a theoretical basis for biological enzyme degumming technology used in the extraction of mulberry fiber and new development of natural fiber products.This paper carried on quantitative analysis of mulberry fiber's chemical composition test, determining the percentage of material content in Mori phloem. According to the characteristics of mulberry fiber itself and the reference to degumming traditional of Hemp fiber raw materials, it identified the process of mulberry enzyme-chemical degumming method. As follows:Sample preparation→Pretreatment→Washed→Enzyme treatment→Washed→A scouring→Washed→Pickling→Washed→Oil→Natural dry→mulberry fiberStudying on mulberry degumming method and comparing parameters of the various process conditions in the impact of degumming effect, it formulated the best parameters of enzyme-chemical degumming method: Pretreatment stage, Concentration of sulfuric acid 3g/L, Time 2h, Temperature 50℃, Liquor ratio 1:20; Enzyme treatment stage, Degumming solution concentration 10g/L, Time 10h, Solution pH=9, Solution temperature 55℃, Liquor ratio 1:30; Alkali cooking, concentration of sodium hydroxide solution 12g/L, Time 2h, Trisodium phosphate additives, Temperature 100℃, Liquor ratio 1:15; Pickling, concentration of acetic acid solution 7g/L, Time 45min, Temperature 50℃, Liquor ratio 1: Comparing with enzyme-chemical degumming method and chemical degumming method, it shows that in the process of enzyme-chemical degumming method, fiber is less damaged, signs of chemical attack on fiber surface is not obvious, length and linear density of fiber are superior to chemical degumming; fiber standard moisture regain is 8.6%; fiber's aggregation structure is less influenced, crystallinity and orientation degree of fiber is higher than chemical fiber degumming; enzyme-chemical degumming method does not change its basic molecular structure of fibers, which still belongs to cellulose, meanwhile, it removes lignin and hemicellulose in mulberry quickly, fiber's purity is very high; the extraction of fiber's breaking strength, fracture work, initial modulus are higher than those of chemical fiber degumming, elongation at break is lower than that of chemical fiber degumming; fiber shows a better gloss and whiteness.