Method and solvent for promoting dissolution of cellulose and application of solvent in preparation of high-strength regenerated cellulose fiber

Through the ball milling method of hydrophilic silica and alkali/urea/water mixed system, the problems of low cellulose solubility and insufficient strength of regenerated fibers are solved, and efficient cellulose dissolution and high-strength regenerated cellulose fiber preparation are achieved, which is suitable for textile, packaging and biomedical fields.

CN120441871APending Publication Date: 2025-08-08SICHUAN UNIV
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Patent Information

Application Number
CN202510632488.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-16
Publication Date
2025-08-08

AI Technical Summary

Technical Problem

The existing cellulose dissolution technology has problems such as low solubility, harsh dissolution conditions, poor stability of spinning fluid, high solidification bath cost and insufficient strength of regenerated fibers, which is difficult to meet industrial needs.

Method used

A hydrophilic silica and alkali/urea/water mixture system is used to prepare solvents by ball milling to promote cellulose dissolution, and high-strength regenerated cellulose fibers are prepared by wet spinning.

Benefits of technology

The solubility of cellulose and the strength of regenerated cellulose fibers were significantly improved, the solubility was increased by 60.1%, the fracture strength of regenerated fibers was increased from 270.2Mpa to 547.6Mpa, and the elongation was increased from 12.8% to 19.1%, reducing the cost of solidification bath.

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Abstract

The invention belongs to the technical field of cellulose dissolution, and particularly relates to a method and a solvent for promoting cellulose dissolution and application of the solvent in preparation of high-strength regenerated cellulose fibers. The invention finds for the first time that when a common solvent system of silicon dioxide and cellulose is subjected to ball-milling mixing, the obtained solvent composition not only improves the solubility of the cellulose, but also can obtain a stable spinning solution after dissolving the cellulose, and improves the strength of the regenerated cellulose fiber prepared from the solvent composition.
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