Efficient Viscose Dissolution Strategy for High‐Strength Regenerated Materials

ABSTRACT Objective : As one of the most widely used fibers in the world, the efficient dissolution and high‐value recycling of viscose are crucial issues. However, due to the highly crystalline nature of commercial viscose, many cellulose dissolution methods remain ineffective in achieving the dissolution and recycling of viscose. This work is to find a method that can execute the effective solubilization and valuable reuse of commercial viscose. Method : A system of thermal polar solvent (TPS) is proposed as an efficient dissolution and high‐value recycling strategy for viscose, enabling a dissolution of up to 13 wt.% in a polar solvent containing Lewis acid salt. Results : This solvent only causes a slight decrease in the degree of polymerization (approximately 16.6%, compared to the loss of 68.4% in natural cellulose) to exhibit its mildness and suitability for viscose dissolution and regeneration. The regenerated viscose film demonstrates excellent mechanical properties and stability compared to films regenerated using other dissolution methods. Additionally, the film regenerated can also be recycled after use. Furthermore, the regenerated viscose is found to be spun into fiber with excellent tensile strength (660 MPa), tensile strain (18%), and light transmittance. Conclusion : This work provides a feasible approach for the cost‐effective, eco‐friendly, and effective recycling of viscose.