Abstract
Using discarded feather fibers (DFs) and ethylene vinyl acetate (EVA) copolymer, the DFs/EVA composites with good sound absorption performance were prepared by hot-pressing method. The effects of hot-pressing temperature, mass fraction of DFs, density and thickness of composites on the sound absorption properties were studied by the controlling variable method. The sound absorption properties of the composites were studied by the transfer function method, and under the optimized technological conditions, the sound absorption coefficient of the composites was above 0.9 and the sound absorption band was wide. According to the box counting method based on the fractal theory, the fractal dimension of DFs/EVA sound absorption composites was calculated through Matlab programming, and the relationship between the fractal dimension and the mass fraction of DFs, the volume density of the composites were analyzed, then the quantitative relationship between the fractal dimension and the maximum sound absorption coefficient was deduced, which played a major role in the sound absorption design of porous sound absorption materials.
Highlights
Nowadays, one of the greatest concerns is the huge amounts of waste feathers that are produced year after year around the world [1]
These results demonstrated that chicken feathers could be useful to obtain novel keratin reinforcements and develop new green composites providing better properties, in comparison to the original biopolymer matrix
This paper reported on the use of discarded feather fibers (DFs) as reinforcement in ethylene vinyl acetate (EVA) powder composites with high sound absorption coefficient
Summary
One of the greatest concerns is the huge amounts of waste feathers that are produced year after year around the world [1]. As acoustic buildings with important functions, such as recording studio, studio, cinema, etc., are related to the design and installation of indoor acoustic materials [2] In this sense, several research groups are working with discarded feather fibers (DFs) to obtain new materials with added value. From the point of acoustics, DFs are different from other natural fibers with large hollow structure, high porosity, low density, and good thermal and sound absorption properties [3,4,5]. Cynthia et al [8] evaluated the performance as reinforcement of a fibrillar protein such as feather keratin fiber over a biopolymeric matrix composed of polysaccharides These results demonstrated that chicken feathers could be useful to obtain novel keratin reinforcements and develop new green composites providing better properties, in comparison to the original biopolymer matrix. According to the self-similarity of DFs, the quantitative relationship between fractal dimension and maximum sound absorption coefficient was deduced by using the box counting method
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
