Spinning Liquid Seaweed Degradation Mechanism Of Inhibition And Degradation Of Basic Research

As one of natural and polar polymers, sodium alginate (SA) has been extensively used in various fields of pharmacy, textiles, and food due to its superior characterization of gelation, biocompatibility and hygroscopic property. However, whether in aqueous solution or in moisture solids, SA solution will degrade to various certain extents, which would bring about many difficulties in the production of alginate and production performance. The anti-degradation and application of SA solutions are still in its undevelopment stage at home and abroad.In this paper, orthogonal experimental method was employed to analyze effect of light and microbe on the degradation of SA solution. Based on the two factors, some degradation inhibition measures were explored and the corresponding anti-degradating mechanism models were also proposed. It will be of definite directive significance to both theoretical analysis and practical application in the future. The main work and conclusions are as follows:1Effects of light and microbe on the degradation of SA solution were studied by single factor orthogonal experiment. Results showed that the presence of light and microbe has a synergistic effect on the degradation of SA solution. Infrared spectrometry (FTIR),1H-nuclear magnetic resonance (1H NMR), gel permeation chromatography (GPC) and digital viscosimeter were employed to characterize time curve of SA solution under different ultraviolet radiation (254,302and365nm). The results show that SA degradation in line with first order degradation kinetics with a degradation rate constant: k254nm <k302nm <k365nm.2As ultraviolet light screener, carbon black (CB), activated carbon (AC), graphene oxide (GO) and functionalized multi-walled carbon nanotubes (MWCNTs) were studied to inhibit the degradation of SA. FTIR, GPC, scanning electron microscope (SEM) and transmission electron microscope (TEM) were employed. The results showed that compared with the blended spinning solution, the degradation rate of neat SA solution is much higher which degraded to50%of its initial molecular weight at room temperature for30days, while the degradation rate of SA/GO solution was only11%. Degradation inhibition effect of carbon materials in SA solution were GO>CB>AC>MWCNTs. Anti-degradation mechanism models of carbon materials were proposed. 3the result of water dispersive inorganic metallic compounds on SA solutions showed that these compounds not only have degradation inhibition effect on SA solutions, but empower alginate fiber in different colors as well as has effect of flame retardance. At the same time, thermal decomposition of the composite fibers was tested by using differential scanning calorimeter (DSC). The results showed that the thermal decomposition temperature of composite fibers were higher than that of neat alginate fiber.