Preparation method of sound-absorbing flame-retardant fiber-based microporous composite material

• Main Authors: DONG AIXUE, QIAN NENG, QIAN GUOCHUN
• Format: Patent
• Language: Chinese; English
• Published: 03.03.2023
• Subjects: ACOUSTICS; ACOUSTICS NOT OTHERWISE PROVIDED FOR; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; LAUNDERING; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; MUSICAL INSTRUMENTS; PHYSICS; SOUND-PRODUCING DEVICES; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS

The invention discloses a preparation method of a sound-absorbing flame-retardant fiber-based microporous composite material. The preparation method comprises the following steps: S1, dissolving cellulose and polyphosphazene into a pre-cooled alkali/urea aqueous solution while stirring to obtain a viscous solution; s2, padding the jute fiber/polyester superfine fiber needled felt in a viscous solution, and treating the jute fiber/polyester superfine fiber needled felt at a certain temperature for a period of time to realize swelling of the jute fibers and splitting of the polyester superfine fibers; s3, the jute fiber/polyester superfine fiber needled felt obtained after padding is put into a coagulating bath, and cellulose and polyphosphazene are subjected to in-situ regeneration to form flame-retardant regenerated cellulose aerogel; and S4, washing with water washing liquid, and drying to obtain the needled felt/aerogel composite flame-retardant sound-absorbing material. By adopting the preparation method o