In order to supplement the decreased production of jute-based acoustic composite materials for automobile interior, sound absorption properties of palm fiber felts/poly ( 3-hydroxybutyrate-co-3-hydroxyvalerate) ( PHBV ) composites were studied. Following Johnson-Allard acoustic absorption model, the effects of different palm fiber felts/PHBV mass ratio, palm fiber surface density, palm fiber linear density, palm fiber gradient structure and porous pulverized coal ash aggregate on acoustic absorption were analyzed, inparalell to the investigation into the tensile properties, thermal stability properties, infrared spectrum and cross section of SEM morphology. The results show that the best mass ratio of palm fiber felt to PHBV for acoustic performance was 40∶60, the linear density of palm fiber was 14. 5 dtex and the gradient structure of palm fiber mat was 143. 3/102. 5 g/m2 . The average was the highest (0. 53) for frequencies between 200 and 1 600 Hz. The addition of 5% porous coal ash ceramsite could increase the acoustic composite materials to 0. 66, which has the potential to partially replace jute for the making acoustic composite materials.
维普
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