New Composite Materials Made from Rigid/Flexible Polyurethane Foams with Fir Sawdust: Acoustic and Thermal Behavior

The aim of this work is to obtain new materials with improved sound absorbing and thermal properties, using rigid or flexible polyurethane foam reinforced with recycled fir sawdust from wood processing as well as by optimizing their mixing ratio. In this respect, we prepared and characterized sample...

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Bibliographic Details
Published in:Polymers 2022-09, Vol.14 (17), p.3643
Main Authors: Tiuc, Ancuța-Elena, Borlea (Mureșan), Simona Ioana, Nemeș, Ovidiu, Vermeșan, Horațiu, Vasile, Ovidiu, Popa, Florin, Pințoi, Ramona
Format: Article
Language:English
Subjects:
Absorption
Acoustic properties
Acoustics
Biodegradable materials
Composite materials
Furniture
Heat conductivity
Insulation
Mechanical properties
Mixing ratio
Moisture content
Noise control
Noise pollution
Plastic foam
Polymers
Polyurethane foam
Polyurethanes
Porous materials
Raw materials
Recycling (Waste, etc.)
Romania
Sawdust
Sound
Sound transmission
Synthetic fibers
Thermal insulation
Thermal properties
Thermodynamic properties
VOCs
Volatile organic compounds
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Summary:The aim of this work is to obtain new materials with improved sound absorbing and thermal properties, using rigid or flexible polyurethane foam reinforced with recycled fir sawdust from wood processing as well as by optimizing their mixing ratio. In this respect, we prepared and characterized samples by mixing rigid polyurethane foam (RPUF)/flexible polyurethane foam (FPUF) with 0, 35, 40, 45, and 50 wt% fir sawdust (FS) with grains size larger than 2 mm. The samples were evaluated by cell morphology analysis, sound absorption, and thermal insulation performance. The obtained composite materials containing 50% sawdust have superior acoustic properties compared to those with 100% FPUF in the range of 420–1250 Hz. The addition of 35% and 50% FS in the FPUF matrix led to improved thermal insulation properties and decreased thermal insulation properties in the case of RPUF. The results show that the use of FS-based composites with the FPUF/RPUF matrix for sound absorption and thermal insulation applications is a desirable choice and could be applied as an alternative to conventional synthetic fiber-based materials and as a recycling method of waste wood.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym14173643