Study On Compound Enzymes Degumming Of Ramie

Ramie in the world is also known as"China grass", as our country’s characteristic product, its output accounts for more than90%of the world. Ramie fibers possess the properties such as longer length, higher breaking tenacity, good air permeability, moisture absorption and moisture. Apparel fabrics made from it possess good wearing properties such as crisp, cool, breathable, good moisture absorption and resistance, antibacterial and antimildew, etc. Ramie fabrics are functional ecology of apparel fabrics. At present, ramie degumming always take traditional chemical degumming as major way in China. This way has the problems such as high cost, large energy consumption, damage to the fiber and so on. It also pollution to environmental greatly. In this low-carbon economy society, people pays more attention on green and environmentally friendly, which made this degumming process is hard to adapt to the intense market competition. Therefore, exploration of a low energy consumption, low pollution and environmental protection type of degumming process becomes very necessary.This paper studied the technique of compound enzyme, on the base of discussing the degumming process of ramie compound biological enzyme, degummed ramie’s relative performances were tested and analyzed. Degummed ramie which made by this way were compared with chemical degumming and SCOURZYME301enzyme degumming. Finally, the degumming wastewater’s CODCr value also has tested and compared.According to the "GB5889-86method of chemical constituent analysis of ramie", the raw ramie’s chemical constituent were analyzed, each component content in the raw ramie were got, and we made pectin, hemicellulose as the main object of degumming by this. Through single factor experiment to determine the main factors which effect of compound enzymatic treatment, the main factors are the concentration of enzyme, temperature, time and pH.Ramie compound biological enzymes degumming processes were determined:raw ramie→complex biological enzyme treatment→enzyme inactivation→washing→alkali cooking→washing→hitting→washing→oxygen bleaching→washing→drying. The degumming experiments were carried out according to the orthogonal table L16(45), using Excel software for visual analysis, SPSS data processing software for analysis of variance. Through integrated balance methods, finally obtained the optimal scheme of compound biological enzyme treatment was A3B2C3D2, which were:pectinase:hemicellulase6%:3%(o.w.f), temperature45℃, time2h, pH4.5. On the optimal scheme, the degummed ramie’s fineness was8.71dtex, breaking tenacity was71.33cN, residual gum content was2.46%.Degummed ramie’s relative properties were tested and analyzed. In the appearance quality, there is no obviously difference in length, which is about71mm. But compound biological enzyme degummed ramie’s hard rate is higher. In the inner quality, degummed ramie’s moisture regain and moisture content is lower than raw ramie’s.Compound biological enzyme degummed ramie’s fineness, residual gum content and whiteness were less than chemical degummed ramie’s, but it’s flexibility, friction property and breaking tenacity were better. On the whole, compound biological enzyme degummed ramie can satisfy the quality requirements of degummed ramie spinning.Through observation of degummed ramie’s SEM, it can be found that there were no obviously difference in cross section, but the difference in the surface were obviously.Compared with chemical degummed ramie, the compound biological enzyme degummed ramie’s surface was rough, cross sections and vertical lines were obviously. Through the IR analysis and comparation, it can be found that there is little difference between different degumming methods, the main difference lies in the wavelength of1630cm-1,1319cm-1, probably due to the difference content of lignin.The test result of waste water’s CODcr value further evidented that compound biological enzyme degumming can reduce the pollution degree to the water, which can not only ease the burden and cost of wastewater treatment,but also can meet the demand of environmental protection. This is win-win to the enterprise and the society.