Acoustical Behavior of Treated Wood Dust-Filler for Polymer Foam Composite

Abstract

Wood dust filler-polymer foam composite has been studied and proved to have ability to absorb sound. In this study, treated rubber and Meranti wood dust named as RA and MA respectively was use as the filler. This study was developed to compare the behavior of sound absorption based on treated filler and particle size of wood dust. By choosing the size of 355 and 710 μm, three different percentages has been selected which is 10%, 15% and 20% for both type of wood dust. These samples has been tested by using Impedance Tube test for sound absorption coefficient (α) measurement and Noise Reduction Coefficient measurement (NRC) and Scanning Electron Microscopy (SEM) to determine the diameter of pore for selected size and type of wood dust-polymer foam composite. The pore size and structure was influence the sound absorption behavior of each sample. 355 μm-polymer foam composite of every percentage loading shows the uniform pore structure as compared to 710 μm of particle size. NRC results shows that increasing pore size has decrease the NRC value. It is therefore, concluded that the sound absorption coefficient for eachsound absorbing material, with different sizes of wood dust particles, types of wood dust and the percentages of wood dust loading in polymer foam matrix effect the sound absorption behavior.

Green silicone elastomer obtained from a counterintuitively stable mixture of glycerol and PDMS

“…For example, in the case of polydimethylsiloxane, incorporating silica particles is a vital process that allows for obtaining highly stretchable materials with good ultimate properties. On the other hand, incorporating rather inexpensive fillers, such as wood-dust, is a common procedure for decreasing a product's price [22]. In our approach we present an innovative way of identifying the introduction of fillers into elastomers.…”

Sound Absorption Properties of Polyurethane Foams Derived From Waste Cooking Oil Incorporated With Waste Wood Fiber Filler

“…The sound absorption coefficient value was calculated as the average value of three cylindrical foam pieces with 10 mm thick and 100 mm (high frequency) and 28 mm (low frequency) in diameter, over the frequency range of 0-5000 Hz [2,16,3]. For the interpretation of the sound absorption efficiency, the noise reduction coefficient (NRC, arithmetic mean of absorption coefficients at 200, 500, 1000, and 2000 Hz) was calculated [5,17].…”

Design of Experiment for In-Situ Synthesis of Waste Vegetable Oils and Synthetic Based Polyurethane (PU) Foam Composites

“…Appropriate loading filler give strength to polymer. The filler is normally organic or inorganic additive their having certain particle size type; flakes, L and powder, P. Therefore, in this study, PU foam were developed based on waste vegetable oil bioepoxy, B [8][9][10] and petroleum based synthetic epoxy, E, crosslinker and wood filler. Foams produced from renewable resources are generally rigid because of the small chain length of the polyols, the presence of rigid groups such as aromatic rings also add to their stiffness and high crosslinking density related with high performance.…”