A method for preparing high-purity regenerated cellulose fibers from waste cotton textiles
By combining low-temperature plasma activation and a laccase-mediator system with a low-temperature ionic liquid dissolution process, the problem of deep dye removal and cellulose dissolution in waste cotton textiles has been solved, producing high-purity, high-performance regenerated cellulose fibers and realizing the high-value utilization of waste resources.
CN122082136APending Publication Date: 2026-05-26EZHOU VOCATIONAL UNIV
View PDF 0 Cites 0 Cited by
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- EZHOU VOCATIONAL UNIV
- Filing Date
- 2026-04-07
- Publication Date
- 2026-05-26
Smart Images
Figure CN122082136A_ABST
Abstract
This invention relates to the field of fiber preparation, specifically disclosing a method for preparing high-purity regenerated cellulose fibers from waste cotton textiles. The method includes: washing and crushing the waste cotton textiles, followed by sequential low-temperature plasma surface activation treatment and enzymatic oxidation decolorization using a laccase-mediator system to obtain activated and decolorized cotton fiber raw materials; then dissolving the raw materials in an ionic liquid solvent at below 80°C to obtain a spinning solution; and finally, through spinning and post-treatment, obtaining regenerated cellulose fibers. This invention achieves deep chemical degradation of covalently bound dyes through the synergistic effect of low-temperature plasma and the laccase-mediator system, while simultaneously effectively inhibiting the thermal degradation of cellulose through low-temperature ionic liquid dissolution. The resulting fibers have high purity and excellent mechanical properties, and the solvent can be recycled, making the process green and environmentally friendly.
Need to check novelty before this filing date? Find Prior Art