Sodium alginate-polyethylene glycol diacrylate based double network fiber: Rheological properties of fiber forming solution with semi-interpenetrating network structure

Abstract

In order to prepare the high mechanical properties fiber with double network, sodium alginate (SA)/polyethylene glycol diacrylate (PEGDA) gel solution with semi-interpenetrating network structure was prepared by using “one-pot” method. Rheological properties of SA/PEGDA gel solution were studied at steady state mode and dynamic mode respectively. The results showed that the SA/PEGDA solution’s apparent viscosity was 0.67 Pa·s at PEGDA of 20 wt%, smaller 92.8% than that of the pure SA solution. When PEGDA content was 20 wt%, the consistency coefficient (k) of the solution reached the minimum (0.57). It meant the flow properties of the solution were the optimal at PEGDA of 20 wt%. Moreover, changes in the storage modulus (G′) and the loss modulus (G″) were found to be dependent on PEGDA content and temperature. The tanδ was greater higher than 1, which meant the spinning solution exhibited viscoelastic behavior of liquid-like properties.