Title: Preparation of High-Performing Porous Nanocomposites for Noise Absorption and Transmission Loss Reduction in Aircraft Interiors

Authors: Kunza Arifa, Ramazan Asmatulu

DOI:

Abstract: The field of acoustics is found challenging in aircraft, manufacturing, automotive, and other industrial fields. Sounds and vibrations are the concepts that still needed thorough research to look into more advancements by seeking new ways in learning the sound waves propagation internally that maximizes the potential capabilities in solving the difficult problems of noise waves accumulation in the aircraft interiors and a possible way for most absorption of unwanted waves using composite The current research focuses on the manufacture of nanocomposite powder and the fabrication of a prototype in the laboratory, as well as the analysis and characterization of composite samples, which yielded encouraging findings. Carbon nano-fillers, including graphene and MWCNTs, incorporated into hightemperature aromatic polymer PEEK powder with solvents, were combined and fabricated into nanoparticulate porous composites with enhanced properties. These composites were subjected to noise and impedance testing on samples to analyze aircraft interior noise across low and high-frequency fluctuating bands. The void and pore sizes influence the propagation of noise waves, as demonstrated by the impedance measurements, with the effects of larger and smaller pores distinguishing how noise waves become trapped within the material. This study is a sophisticated and difficult addition to the realm of nanotechnology. The study shows that the material's enormous pores can be controlled to shrink to smaller sizes, allowing noise waves to be effectively transmitted, trapped, and absorbed through wall-angle interactions. Measurements of surface porosity and pore volume were used to compute variations in pore percentage. Acidic samples showed a difference of 93.3%, while nonacidic samples showed a higher porosity difference of 85.7% due to a reduced pore volume. The prototype samples were created and examined for particle hybridization transitions from sp³ to sp² structures. Effective noise energy absorption across varying frequency ranges is made possible by the fabrication process, especially at low frequencies where negative sound transmission loss (STL) values were noted. Depending on sample thickness and nanofiller weight percentage, positive STL values occurred at higher frequencies. The STL curves demonstrated a notable improvement in noise damping capacity, with higher STL peak values corresponding to an increase in nanofiller weight percentage. Furthermore, the STL curve's dip became more noticeable as frequency rose. ANOVA was used to statistically assess and graphically depict these findings.

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Conference: SAMPE 2026

Publication Date: 2026/04/27

SKU: 79

Pages: 19

Price: $38.00