Extract Sodium Alginate Based On Biological Enzyme And Fiber Preparation

This paper reports sodium alginate extraction by enzyme-ultrasonic combined method.We focus on extraction of sodium alginate, characterization of functional fibers and optimization of the process.Through the single factors and orthogonal experiments, the order of the factors was analyzed as following:pH> temperature> enzyme dosage> ultrasonic power> enzymatic hydrolysis time. The optimal conditions were pH4, temperature50℃, enzyme dosage8%,ultrasonic power160W.enzymatic hydrolysis time3.5h.The average extraction rate was23.1%, higher than the traditional methods.Analyzed the viscosity of the blend solution was significantly increased, as the concentration of sodium alginate increasesd. The content of chitosan and tourmaline was less influence on the viscosity. The viscosity of the blend solution was decreased as the temperature increased. The crystallization is0.78. The breaking strength of the fiber is2.3cN/dtex, and the elongation at break was14.8%. The fiber factor of dynamic friction was0.259, and the static friction coefficient was0.301, the gap is0.04.The anion emission of the functional fibers was increased with the coupling agent increased. Too high percentage of tourmaline has a very significant stratification and sedimentation in the solution.Box-Benhnken Design response surface experimental design method is used to optimize the factors influencing anion emission, and the optimal anion releasing condition is as following:tourmaline1.01g/100mL, coupling agent0.23mL/100mL, dispersant0.31g/100mL. By the optimal condition, the anion releasing quantity is2950per cubic centimeter.