Abstract
The thin nanofibrous layer has different properties in the field of sound absorption in comparison with porous fibrous material which works on a principle of friction of air particles in contact with walls of pores. In case of the thin nanofibrous layer, which represents a sound absorber here, the energy of sonic waves is absorbed by the principle of membrane resonance. The structure of the membrane can play an important role in the process of converting the sonic energy to a different energy type. The vibration system acts differently depending on the presence of smooth fibers in the structure, amount of partly merged fibers, or structure of polymer foil as extreme. Polyvinyl alcohol (PVA) was used as a polymer because of its good water solubility. It is possible to influence the structure of nanofibrous layer during the production process thanks to this property of polyvinyl alcohol.
Highlights
The porous fibrous materials, usually used for application in the sound absorption field, absorb sonic waves especially at higher frequencies
The thin nanofibrous layer has different properties in the field of sound absorption in comparison with porous fibrous material which works on a principle of friction of air particles in contact with walls of pores
In case of the thin nanofibrous layer, which represents a sound absorber here, the energy of sonic waves is absorbed by the principle of membrane resonance
Summary
The porous fibrous materials, usually used for application in the sound absorption field, absorb sonic waves especially at higher frequencies. Thanks to the large specific surface of fibers as well as small pores size, the nanofibrous layers have different properties in comparison with currently produced porous fibrous material. Paper [4] describes the case of the decreasing diameter of nanofibers with increasing collection distance by using of PVA solution. This work shows resulting values of average fiber diameter by application of various electrical potential in electrospinning process too. Works [4, 6–8] describe effect of polymer solution concentration and its influence on nanofiber diameter by process electrospinning. Article [8] describes a correlation between molecular weight, concentration of solution and average fibers diameter. Used for polymer solution to the resultant fibers average diameters in nanofibers layer. The structure of thin nanofibrous membrane can vary as noted above, and the sound absorption properties differ
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