Abstract
In order to greatly reduce the viscosity of sodium alginate (SA) gel solution and improve the properties of calcium alginate (CA) fiber, SA/polyethylene glycol acrylate (PEGDA) gel spinning solution with interpenetrating network structure was prepared by using one-pot method firstly. Then the solution was extruded continuously into the coagulation bath. CA/PEGDA composite fiber with double network was prepared by ionic crosslinking SA macromolecules with Ca2+ during the dynamic molding process of solidification, stretch and curl. Rheological results indicated that the spinning solution’s apparent viscosity was 92.8% smaller than that of the pure SA solution at PEGDA content of 20 wt%. As the PEGDA content increased, the storage modulus G' and the loss modulus G" both decreased. FTIR results showed that PEGDA content had an obvious influence on hydrogen bond in CA/PEGDA system. The tensile strength of composite fiber reached maximum of 2.91cN/dtex at PEGDA of 10%.
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