Sound absorption property of PVA/PEO/GO nanofiber membrane and non-woven composite material

2019 ◽  
Vol 50 (4) ◽  
pp. 512-525
Author(s):  
Huan Liu ◽  
Baoqi Zuo
Keyword(s):  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Polyethylene Oxide ◽  
Sound Absorption ◽  
Woven Fabric ◽  
Nanofiber Membrane ◽  
Absorption Properties ◽  
Blend Films ◽  
Absorption Performance ◽  
Nanofiber Membranes

Blend films based on polyvinyl alcohol/polyethylene oxide (70/30 wt%) undoped and doped with different concentration of graphene oxide were prepared by spiral vane electrospinning. Characteristic properties of the blend films were investigated by using X-ray diffraction and scanning electron microscopy. The sound absorption performance of the compositions (nanofiber membranes and needle punched non-woven fabric) was tested by an impedance tube. The sound absorption performance of non-woven fabric has greatly improved after combining with thin nanofiber membranes. With addition of graphene oxide, the fibers were intertwined in a loop and form a network, the areal density and surface roughness of the nanofiber membrane are reduced. Composites containing polyvinyl alcohol/polyethylene oxide nanofiber membranes and composites containing polyvinyl alcohol/polyethylene oxide/graphene oxide nanofiber membranes exhibited different sound absorption properties in different frequency bands. When the fiber coefficient of variation was small, the average sound absorption coefficient of the composite material was high. However, composites containing both polyvinyl alcohol/polyethylene oxide and polyvinyl alcohol/polyethylene oxide/graphene oxide nanofiber membranes had similar sound absorption properties, and the average sound absorption coefficient was greater than that of polyvinyl alcohol/polyethylene oxide composites.

Sound absorption performance of flexible polyurethane/silicon dioxide perforated coating composites

2021 ◽  
pp. 004051752110155
Author(s):  
Min Peng ◽  
Xiaoming Zhao ◽  
Weibin Li
Keyword(s):  
Silicon Dioxide ◽  
Sound Absorption ◽  
Woven Fabric ◽  
Perforation Rate ◽  
Cavity Depth ◽  
Resonant Frequencies ◽  
The Matrix ◽  
Absorption Performance ◽  
Traditional Sense ◽  
Flexible Polyurethane

Perforated materials in the traditional sense are rigid, usually dense, costly and inflexible. For this study, polyester/cotton blended woven fabric as the base fabric, nano-SiO2 (silicon dioxide) as the functional particles and PU (polyurethane) as the matrix were selected. Accordingly, flexible PU/SiO2 perforated coating composites with different process parameters were developed. The influence of the nano-SiO2 content, perforation diameter, perforation rate, number of fiber felt layers and cavity depth on the sound absorption coefficient were investigated. The resonant frequencies of materials with different cavity depths were evaluated by both theoretical calculation and experimental method. It was found that the flexible perforated composite has good sound absorption and mechanical properties, and has great potential for applications requiring soft and lightweight sound absorption materials.

scholarly journals An Antimicrobial Peptide-Loaded Chitosan/Polyethylene Oxide Nanofibrous Membrane Fabricated by Electrospinning Technology

2021 ◽  
Vol 8 ◽  
Author(s):  
Ling Yu ◽  
Shubin Dou ◽  
Jinghan Ma ◽  
Qiang Gong ◽  
Mogen Zhang ◽  
...  
Keyword(s):  
Wound Healing ◽  
Polyethylene Oxide ◽  
Total Concentration ◽  
Average Diameter ◽  
Nanofiber Membrane ◽  
New Class ◽  
Intensity Changes ◽  
Good Biocompatibility ◽  
Nanofiber Membranes

Antimicrobial peptides (AMPs) are a new class of promising antibacterial agents. We prepared electrospinning chitosan (CS)-polyethylene oxide (PEO) nanofiber membranes containing different concentrations of an antibacterial peptide NP10. The average diameter of nanofibers increased with the total concentration of NP10. The FTIR shows that all the peaks of CS-PEO nanofiber membranes with different concentrations of NP10 were almost the same as those of pure CS-PEO nanofiber membranes, and only the peak intensity changes. Adding NP10 can improve the thermal stability of CS-PEO nanofiber membranes. In the in vitro release experiment, NP10 was released from the CS-PEO-0.5%NP10 nanofiber membrane in a burst first and then slowly and continuously. Simultaneously, the CS-PEO-NP10 nanofiber membrane had good antibacterial activity against Escherichia coli and Staphylococcus aureus and good biocompatibility. In animal wound healing experiments, CS-PEO-0.5%NP10 nanofiber membrane had advantages over gauze and CS-PEO nanofiber membrane in wound healing. These properties may provide a choice for the clinical application of AMPs and treatment of wound infections.

scholarly journals Improving the Performance of Feather Keratin/Polyvinyl Alcohol/Tris(hydroxymethyl)Aminomethane Nanocomposite Films by Incorporating Graphene Oxide or Graphene

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 327 ◽  
Author(s):  
Shufang Wu ◽  
Xunjun Chen ◽  
Tiehu Li ◽  
Yingde Cui ◽  
Minghao Yi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Water Vapor Permeability ◽  
Nanocomposite Films ◽  
Light Transmittance ◽  
Vapor Permeability ◽  
Blend Films ◽  
Feather Keratin ◽  
Degradation Temperature ◽  
Bionanocomposite Films

In this study, feather keratin/polyvinyl alcohol/tris(hydroxymethyl)aminomethane (FK/PVA/Tris) bionanocomposite films containing graphene oxide (GO) (0.5, 1, 2, and 3 wt%) or graphene (0.5, 1, 2, and 3 wt%) were prepared using a solvent casting method. The scanning electron microscopy results indicated that the dispersion of GO throughout the film matrix was better than that of graphene. The successful formation of new hydrogen bonds between the film matrix and GO was confirmed through the use of Fourier-transform infrared spectroscopy. The tensile strength, elastic modulus, and initial degradation temperature of the films increased, whereas the total soluble mass, water vapor permeability, oxygen permeability, and light transmittance decreased following GO or graphene incorporation. In summary, nanoblending is an effective method to promote the application of FK/PVA/Tris-based blend films in the packaging field.

scholarly journals Effect of the Pore Shape and Size of 3D-Printed Open-Porous ABS Materials on Sound Absorption Performance

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4474
Author(s):  
Katarina Monkova ◽  
Martin Vasina ◽  
Peter Pavol Monka ◽  
Drazan Kozak ◽  
Jan Vanca
Keyword(s):  
Sound Absorption ◽  
Negative Impact ◽  
Excitation Frequency ◽  
Volume Ratio ◽  
Acrylonitrile Butadiene Styrene ◽  
Normal Incidence ◽  
Absorption Properties ◽  
Absorption Performance ◽  
3D Printed ◽  
Material Volume

Noise has a negative impact on our environment and human health. For this reason, it is necessary to eliminate excessive noise levels. This paper is focused on the study of the sound absorption properties of materials with open-porous structures, which were made of acrylonitrile butadiene styrene (ABS) material using additive technology. Four types of structures (Cartesian, Octagonal, Rhomboid, and Starlit) were evaluated in this work, and every structure was prepared in three different volume ratios of the porosity and three different thicknesses. The sound absorption properties of the investigated ABS specimens were examined utilizing the normal incidence sound absorption and noise reduction coefficients, which were experimentally determined by the transfer function method using a two-microphone acoustic impedance tube. This work deals with various factors that influence the sound absorption performance of four different types of investigated ABS material’s structures. It was found, in this study, that the sound absorption performance of the investigated ABS specimens is strongly affected by different factors, specifically by the structure geometry, material volume ratio, excitation frequency of an acoustic wave, material’s thickness, and air space size behind the tested sound-absorbing materials.

scholarly journals Numerical Simulation for the Sound Absorption Properties of Ceramic Resonators

Fibers ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 77
Author(s):  
Giuseppe Ciaburro ◽  
Gino Iannace
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
Simulation Model ◽  
Sound Absorption ◽  
Ceramic Materials ◽  
Acoustic Behavior ◽  
Absorption Properties ◽  
Acoustic Resonators ◽  
Absorption Performance ◽  
Artificial Neural

This work reports the results of experimental measurements of the sound absorption coefficient of ceramic materials using the principle of acoustic resonators. Subsequently, the values obtained from the measurements were used to train a simulation model of the acoustic behavior of the analyzed material based on artificial neural networks. The possible applications of sound-absorbing materials made with ceramic can derive from aesthetic or architectural needs or from functional needs, as ceramic is a fireproof material resistant to high temperatures. The results returned by the simulation model based on the artificial neural networks algorithm are particularly significant. This result suggests the adoption of this technology to find the finest possible configuration that allows the best sound absorption performance of the material.

Sound Absorption Performance of Micro-Perforated Panel (MPP) Made from Biodegradable Composite (Hibiscus Cannabinus+PLA) Material

2018 ◽  
Vol 791 ◽  
pp. 3-9
Author(s):  
Desmond Daniel Vui Sheng Chin ◽  
Musli Nizam Bin Yahya ◽  
Nazli Bin Che Din ◽  
Pauline Ong ◽  
Izzuddin Bin Zaman ◽  
...  
Keyword(s):  
Sound Absorption ◽  
Helmholtz Resonator ◽  
Hibiscus Cannabinus ◽  
Absorption Properties ◽  
Promising Alternative ◽  
Metallic Material ◽  
Biodegradable Composite ◽  
Kenaf Fibre ◽  
Peak Absorption ◽  
Absorption Performance

Micro-perforated panel (MPP) has been widely considered as a very promising alternative in absorbing sound by utilizing the concept and mechanism of Helmholtz resonator. Most of the existing MPP are made of metallic material such as aluminium or stainless steel. In this study, biodegradable composite micro-perforated panel (BC-MPP) made from kenaf fibre and polylactic acid (PLA) will be implemented. Impedance tube test shows that BC-MPP possessed excellent sound absorption properties and could rival with conventional MPP. The peak absorption of BC-MPP is also more significant compare to conventional MPP as the peak absorption almost reaches unity.

Sound absorbing properties of roller blind curtain fabrics

2016 ◽  
Vol 47 (1) ◽  
pp. 3-19 ◽  
Author(s):  
Oğuz Demiryürek ◽  
Hüsnü Aydemir
Keyword(s):  
Sound Absorption ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Sound Insulation ◽  
Effective Parameters ◽  
Absorption Properties ◽  
Regression Curves ◽  
Woven Structures ◽  
Absorbing Property ◽  
Coating Mixture

Roller blind fabrics are preferred and commonly used in home and office. In general, these fabrics are produced by coating the acrylic blended material, which is known by their ultraviolet properties, onto polyester woven fabrics. In this study, in order to characterize the sound insulation properties of roller blind fabrics, coating resin having different ratios of acrylic are applied onto different polyester woven structures. Sound absorption properties of these fabrics (front and back sides) are measured through dual microphone impedance tube and investigated by statistical analyses. Regression curves are obtained and optimum fabric properties on sound absorbing property have been suggested. As a result, acrylic content in coating material, fabric type, and viol structures occurred by coating process on the woven fabric are found as effective parameters on sound absorption properties of these fabrics. Increasing acrylic content in the resin up to 40% increases the sound absorbing value but further increasing this ratio yields sound reflection from the structure, in general. Optimum sound absorption and reflection values are provided with 40% acrylic rate in coating mixture.

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