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- Title
Dual-network PVA fiber-doped cellulose aerogel with labyrinth structure for low and medium frequency acoustic and flame retardant applications.
- Authors
Lou, Ching-Wen; Tian, Fei; Zhou, Xiangyu; Zhang, Lu; Li, Shufeng; Lin, Jia-Horng; Li, Ting-Ting
- Abstract
The development of a renewable green sound-absorbing material is a very meaningful topic in solving the environmental pollution caused by traditional waste sound-absorbing materials. In this study, a cellulose-based dual network labyrinthine structure composite aerogel was developed by combining PVA staple fibers with magnesium hydroxide nano-flame retardant particles. Porous cellulose aerogels with a labyrinthine structure were constructed by adding PVA staple fibers. Due to the complex bending branching of fibers in the aerogel, the aerogel exhibits significantly enhanced acoustic absorption in the low to medium frequency range. The doping of short fibers in the porous structure constitutes a double network structure, which increases the propagation path of sound waves, and the noise reduction coefficient of the material is significantly increased. Meanwhile, in situ synthesis of magnesium hydroxide nanoparticles with flame retardant properties inside the cellulose aerogel structure can also provide good flame retardant properties. The resulting polyvinyl alcohol fiber doped magnesium hydroxide cellulose aerogel (MH NPs@PVA/Cellulose aerogel) exhibited an excellent noise reduction coefficient of 0.46 in the low to medium frequency range. The maximum noise reduction coefficient reached 0.53 when the air layer was 15 mm, an outstanding compressive strength of 1.107 MPa and 70% strain. Moreover, cellulose aerogels not only exhibit high porosity and low density but also show good flame retardant performance which can self-extinguish within 40 s. The green recyclable and degradable MH NPs@PVA/Cellulose aerogel presents great potential in the construction and decoration field.
- Subjects
FIREPROOFING agents; AEROGELS; FIRE resistant polymers; CELLULOSE fibers; CELLULOSE; MAGNESIUM hydroxide; NOISE control; SOUND waves; ACOUSTIC wave propagation
- Publication
Cellulose, 2024, Vol 31, Issue 9, p5795
- ISSN
0969-0239
- Publication type
Article
- DOI
10.1007/s10570-024-05952-3