Acoustic and thermal performance of polypropylene nonwoven fabrics for insulation in buildings

Karimi, Faezeh; Soltani, Parham; Zarrebini, Mohammad; Hassanpour, Ali

doi:10.1016/j.jobe.2022.104125

Cited by 20 publications

(16 citation statements)

References 69 publications

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“…Therefore, according to the heat bridge theory, heat should be preferentially conducted through CF when passing HGB/CF/PPESK composites. When heat is transferred parallel to the fiber direction (Figure 4A), CF form a through‐conduction “highway” that enables rapid heat transfer from the higher temperature side to the lower temperature side 37,38 . However, when heat is conducted perpendicular to the fiber direction (Figure 4B), CF can guide part of the heat to both sides of the material, resulting in a lower thermal conductivity, which can well explain the phenomenon that the thermal conductivity parallel to the fiber direction is much higher than that perpendicular to the fiber direction.…”

Section: Resultsmentioning

confidence: 99%

Thermal insulation and mechanical properties of carbon fiber‐reinforced thermoplastic polyphthalazine ether sulfone ketone composites reinforced by hollow glass beads

Feng,

Li,

Wang

et al. 2023

Polymer Composites

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In the high‐tech field, there is an urgent need for materials that possess thermal insulation, mechanical properties, and processing properties. One promising option is Carbon fiber reinforced thermoplastic composites (CFRTPs), which exhibit excellent characteristics such as light weight, high strength, and high temperature resistance. The effects and mechanisms of hollow glass beads (HGB) on the thermal insulation and mechanical properties of carbon fiber‐reinforced thermoplastic polyphthalazine ether sulfone ketone composites (CF/PPESK) were investigated. The introduction of 15 wt% HGB improved the material's thermal insulation performance by 32.74% perpendicular to the fiber direction and 44.95% parallel to the fiber direction. Furthermore, the addition of 3 wt% HGB increased the interlaminar shear strength, compression strength, and flexural strength by 21.34%, 17.49%, and 5.53%, respectively. Additionally, the dynamic mechanical analysis confirmed that the HGB/CF/PPESK composite has superior high‐temperature mechanical properties, which holds great promise for CFRTPs applications.Highlights Modification of CF/PPESK with HGB improved its thermal insulation properties. Analysis of the mechanism of CF/PPESK for thermal insulation performance. HGB improved the mechanical properties by delaying the expansion of microcracks. Agglomeration of HGB leads to a rapid rise in thermal insulation properties.

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Section: Resultsmentioning

confidence: 99%

Thermal insulation and mechanical properties of carbon fiber‐reinforced thermoplastic polyphthalazine ether sulfone ketone composites reinforced by hollow glass beads

Feng,

Li,

Wang

et al. 2023

Polymer Composites

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“…Sound absorption in these elements take place between 50 and 400 Hz, but the resonance frequency range can be enlarged by filling the cavity with absorbing material. The same mechanism is used in perforated panels that are placed at a certain distance d from a wall, and the working frequency is [42]: (5) where P is the percentage of perforation, and th is the thickness of the panel.…”

Section: Acoustic Characterizationmentioning

confidence: 99%

“…When dealing with building refurbishment, energy-saving and indoor comfort are two increasingly important matters. Two main aspects, thermal and acoustic comfort, are generally developed independently, with few exceptions [5,6]. Thermal comfort is governed, among other variables, by the indoor air temperature, mean radiant temperature, and humidity.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Acoustic Characterization of Innovative and Unconventional Panels Made of Reused Materials

Neri

2022

Atmosphere

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Europe calls for a transition to the circular economy model based on recycling, reuse, the proper design of products, and repair. Recycling requires energy and chemical products for waste processing; on the contrary, reusing reduces the impact of transportation and expands the life of materials that cannot be recycled. This article highlights the characteristics of selected end-of-life materials; it aims to raise awareness among manufacturers to consider products’ conscious design to facilitate their reuse in different sectors. Panels 7 cm thick, realized by assembling cardboard packaging, egg boxes, bulk polyester, and felt, have been experimentally tested to understand whether they can be installed indoors to improve thermal and acoustic comfort. The panels’ equivalent thermal conductivity λeq measured through the guarded hot plate method is 0.071 W/mK. Acoustic tests have been performed in a sound transmission room and a reverberation room. The weighted sound reduction index Rw is 19 dB, the weighted sound absorption coefficient αw is 0.30, and the noise reduction coefficient NRC is 0.64. The measured properties have been compared to those of commercial materials, and the results show that the panels have interesting properties from the thermal and acoustic points of view. They could be employed in the building sector and in disadvantaged contexts where low-income people cannot afford commercial insulating materials. Although other factors, such as fire resistance, need to be evaluated, these results show that the proposed approach is feasible.

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Section: Introductionmentioning

confidence: 99%

“…Currently, PP enjoys significant market demand and finds widespread applications in diverse fields, including clothing, 5 medical devices, 6 automotive components, 7 packaging, 8 and construction. 9 PP is highly regarded for its low density, good rigidity, high crystallinity, 10 high strength, chemical resistance, and excellent processing properties. However, its limited impact strength poses certain restrictions on its applications, while the extensive use and improper disposal of waste PP have placed environmental strain.…”

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confidence: 99%

The effect of diatomite dosage on physical, mechanical, and rheological creep properties of poplar wood/polypropylene composites

Han

Liu

et al. 2023

Polymer Composites

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The present study investigates the influence of micron‐sized diatomite dosage on the physical, mechanical, rheological, and creep properties of poplar wood/polypropylene (PW/PP) composites to enhance their toughness and practicality. The diatomite‐PW/PP composites were prepared using the melt extrusion method, replacing different proportions of PW with diatomite, and subsequently evaluated for their properties. The results indicate that adding diatomite enhances the density while reducing the brightness and water absorption of the composites. Scanning electron microscopy, analysis reveals a uniform distribution of diatomite in the range of 5–10 wt%, which effectively serves as a filler and reinforcing agent, consequently improving the toughness of the composite system. Specifically, the impact strength, tensile strength, and elongation at break are enhanced by 25.9%, 9.5%, and 35.7%, respectively. Furthermore, creep rheological analysis demonstrates improved processability and creep resistance in the composite system.

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Acoustic and thermal performance of polypropylene nonwoven fabrics for insulation in buildings

Cited by 20 publications

References 69 publications

Thermal insulation and mechanical properties of carbon fiber‐reinforced thermoplastic polyphthalazine ether sulfone ketone composites reinforced by hollow glass beads

Thermal insulation and mechanical properties of carbon fiber‐reinforced thermoplastic polyphthalazine ether sulfone ketone composites reinforced by hollow glass beads

Thermal and Acoustic Characterization of Innovative and Unconventional Panels Made of Reused Materials

The effect of diatomite dosage on physical, mechanical, and rheological creep properties of poplar wood/polypropylene composites

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