Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

Macromolecular Rapid Communications, Journal Year: 2024, Volume and Issue: 45(14)

Published: April 19, 2024

Abstract Various acoustic materials are developed to resolve noise pollution problem in many industries. Especially, with porous structure broadly used absorb sound energy civil construction and transportation area. Polyurethane (PU) possess excellent damping properties, good toughness, well‐developed pore structures, which have a broad application prospect absorption field. This work aims summarize the recent progress of fabrication for PU application. The mechanisms introduced. Different kinds typical covered highlighted, include foam, modified materials, aerogel, templated PU, special materials. Finally, development direction existing problems material briefly prospected. It can be expected that high coefficient obtained by using some facile methods. design accurate regulation structures or multilayer is favorably recommended fulfill demand industrial commercial applications future work.

Language: Английский

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Acoustic and thermal properties of panels made of fruit stones waste with coconut fibre

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 426, P. 136054 - 136054

Published: April 9, 2024

Using natural porous and fibrous materials for acoustic thermal conditioning in the construction sector is a solution to achieve comfort level buildings. The novelty of this research work lies employing agricultural agro-industry waste solve noise insulation problems. This study was conducted investigate multilayered panel made fruit stones coconut fibre from waste. Acoustic absorption, transmission, tests were run on four different stone types, olive, cherry, apricot peach, plus layer. Although they are not structural elements, bending ensure panels' integrity. complied with recommendations Standards ISO 10534–2 ASTM E 2611–09, based standing wave tube obtain absorption coefficient sound transmission loss, respectively. Standard EN 12667 considered test determine conductivity hot plate method. results show an average above 0.5 over 25 dB within certain frequency ranges. cherry panels had values around 0.7 apricots up 30 dB. Samples' transmittance between 3.0 3.4 (W/m2K), which indicate ability provide insulation. olive obtained lowest (around 0.14 W/mK). backing effect layer improves all properties.

Language: Английский

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Sound absorption and thermal insulation materials from waste palm oil for housing application: Green polyurethane/water hyacinth fiber sheet composite

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 438, P. 137007 - 137007

Published: June 15, 2024

Language: Английский

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Foundations of Computational Thermo-kinetics in RPUF

SpringerBriefs in applied sciences and technology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 26

Published: Jan. 1, 2025

Language: Английский

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Detailed investigation on the insulation and permeability characteristics of rigid polyurethane foam loaded with micron-sized Turkey feather powder depending on the free volume change

Cellular Polymers, Journal Year: 2023, Volume and Issue: 42(5-6), P. 204 - 225

Published: Sept. 1, 2023

This study brokes new ground to understand the insulation and permeability performances of rigid polyurethane foams (RPUFs) containing different contents micron-sized turkey feather powders (TFPs) depending on free volume change for first time. The effects TFPs loading RPUFs were investigated by examination their structural chemical features (particle size ATR-FTIR analyses), property (PALS analysis), (thermal conductivity sound absorption tests), performance (air water vapor tests) cellular topology (SEM). PALS analysis results revealed that addition into led sharp decrease in all parameters since caused formation disordered cells occupying holes matrix. Furthermore, both thermal acoustic resulting get worse when compared unfilled RPUF. attributed thinner weaker during polymerization, reduction amount CO 2 inside cells, enhancement solid-phase level matrix due increasing volumetric density. Additionally, foam samples with high content showed considerably lower air permeabilities neat dominant hydrophobic character keratin degree vacancies SEM also good compatibility RPUF, but distorted irregular shaped morphology was obtained at contents.

Language: Английский

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Thermal performance and sound absorption capability of water hyacinth stems-based materials

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 425, P. 138903 - 138903

Published: Sept. 17, 2023

The main aim of this study was to assess the efficacy water hyacinth stem as insulation material by analysing its thermal and acoustic performance. Several particleboards composites were prepared adding either binders or blending with other construction materials. During preparation samples, various factors including sample thickness, average particle size in degree compaction, type binder used taken into consideration. Particleboards manually compacted particles range 1–2 mm a 14 thickness showed lowest conductivity coefficient highest value weighted absorption coefficient. Additionally, mixed gypsum reached lower higher sound values than those observed for cement-based obtained under same conditions. found published literature types biomass materials suggest that has significant potential use, alone combination materials, conditioning material.

Language: Английский

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Research progress on the improvement strategy of foaming behavior for biodegradable polymer foams and their functional applications

Sustainable materials and technologies, Journal Year: 2025, Volume and Issue: unknown, P. e01354 - e01354

Published: March 1, 2025

Language: Английский

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Polyurethane and its composites derived from bio-sources: Synthesis, characterization and adsorption studies

Polymers and Polymer Composites, Journal Year: 2022, Volume and Issue: 30

Published: Jan. 1, 2022

Polyols from chaulmoogra seed oil and grape were prepared by epoxidation ring opening of oxirane using lactic acid in nitrogen atmosphere with a control over their functionality. Nanocellulose was derived Desmostachya Bipinnata grass leaves further surface functionalized. Modified nanocellulose used as filler to prepare porous flexible bio-based polyurethane nanocomposites via in-situ polymerization. Adsorption malachite green (MG) dye wastewater the composites carried out. The effect varying factors such weight percentage filers (modified nanocellulose), dosage adsorbent, pH, temperature time on MG adsorption have been studied experimentally. Material characterization for materials out FTIR, NMR, TGA, DSC, SEM along other physical chemical methods. FTIR results indicated presence peaks at 1704 cm −1 –C=O stretching vibrations urethane groups, 1531 –NH bending, 1232 –C–N 1105 –C–O group (–NHCOO–) thus, indicating formation linkage polyurethane. functionality around 2.8 obtained oils, which has contributed forming polyurethanes. Morphological studies indicate nano fibrillation cellulose closed-cell porosity its composites. PU displayed improved thermal stability 256.3°C 270.5°C. Taguchi’s L 27 orthogonal array applied experimental design optimization analyzed ANOVA raw S/N ratio. It found that pH is most influential factor lead quantity nanocellulose, time, adsorbent temperature.

Language: Английский

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Fabrication of one-step shape memory gradient sound absorber with wrinkled inner wall and closed-pore structure

European Polymer Journal, Journal Year: 2023, Volume and Issue: 196, P. 112226 - 112226

Published: June 17, 2023

Language: Английский

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Exploring the Frontiers and Hurdles of Phosphorus-Based Intumescent Flame-Retardant Polyurethane: A Comprehensive Journey

Polymer-Plastics Technology and Materials, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 44

Published: Jan. 26, 2025

Language: Английский

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