Preparation and sound absorption properties of barium titanate/nitrile butadiene rubber-polyurethane foam composites with stratified structure

Jiang, Xueliang; Wang, Zhijie; Yáng, Zhèn; Zhang, Fuqing; You, Feng; Yao, Chu

doi:10.1039/c8ra03330g

Cited by 11 publications

(10 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The composites’ morphological structure, cavities, and pores were closely related to the sound absorption behavior. Adding HNC decreased the cavity and pore size, increasing the surface area, which caused a more circuitous sound wave propagation path, resulting in better absorption behavior, especially in the mid-frequency range, for the FPU/HNC 1% composite . It was expected that the increase in the HNC content (2–5 wt %) caused more shifting to the mid-frequency range or low-frequency range, but the results showed no significant effect on the α ni values with increasing HNC contents.…”

Section: Resultsmentioning

confidence: 96%

Halloysite-Decorated Mechanically Robust Polyurethane Nanocomposite Foams for Acoustic Relevance

Maamoun

Elkhateeb

Zulfiqar

2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Noise pollution affects human health and the environment. In this study, halloysite nanoclay (HNC) was employed as a bio-nanofiller with different ratios (1−5 wt %) to improve the thermal, mechanical, and sound absorption capabilities of the flexible polyurethane (FPU) foam. FPU/HNC composites were characterized using X-ray diffraction, Fourier transform infrared, and field emission scanning electron microscopy techniques. In addition, porosity, apparent density, and sol fraction for FPU/HNC composites were investigated. Compared with the unfilled FPU foam, the results of the FPU/HNC 1% sample showed that the density achieved a maximum value of 38.17 Kg/m 3 , while the porosity was reduced to 83.48%. Moreover, the sol fraction reached the highest value of 13.4% for the FPU/HNC 5% sample. Furthermore, thermogravimetric analysis revealed that adding 1 wt % HNC improved thermal stability than the unfilled FPU. Nevertheless, the DSC measurement proved that HNC increased the glass transition temperature (T g ) for the composites' soft segments. Intriguingly, the mechanical measurements exposed that the compressive and tensile strength of the FPU/HNC 1% sample was enhanced to 158.93 and 154.45%; at the same time, the elongation at break dropped to 124.04%. Nevertheless, the sound absorption measurements (20 mm thickness) showed a slight shift to the mid-frequency range (315−1600 Hz) for FPU/HNC composites than the unfilled FPU.

show abstract

Section: Resultsmentioning

confidence: 96%

Halloysite-Decorated Mechanically Robust Polyurethane Nanocomposite Foams for Acoustic Relevance

Maamoun

Elkhateeb

Zulfiqar

2022

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…However, sound absorption by PUFM was different after NBR was combined with PUFM. The NBR layer, a layer with relatively high density, reflected a significant quantity of the sound waves in the interface of air and the NBR layer, especially medium and high frequency sound waves [31,32]. Therefore, most of the low frequency sound waves, and a few medium and high frequency sound waves, passed through the NBR layer and entered the interior of the PUFM layer.…”

Section: Discussionmentioning

confidence: 99%

“…In recent years, spiral structures [29], 3D-printed meta-structures [30] and other new structures have appeared, and relevant sound-absorbing composites with small thickness and low weight also have arisen. In our previous research, a new multilayered structure of sound-absorbing composites consisting of polyurethane foam and BaTiO 3 /nitrile butadiene rubber showed fine low-frequency sound absorption performance [31,32]. However, barium titanate, used as a filler, is expensive and the preparation of the multilayered structure is difficult, which impedes practical application.…”

Section: Introductionmentioning

confidence: 99%

Structural Design and Sound Absorption Properties of Nitrile Butadiene Rubber-Polyurethane Foam Composites with Stratified Structure

et al. 2018

Self Cite

View full text Add to dashboard Cite

Sound absorbing composites with stratified structures, including double-layer and sandwich structures, were prepared through the combination of nitrile butadiene rubber (NBR) and polyurethane foam (PUFM). The effects of the thickness ratio of layers, different stratified structures and the variety of fillers on the sound absorption performance of the NBR-PUFM composites and the sound absorption mechanism were studied. The results show that the NBR-PUFM composite with a sandwich structure and thickness ratio of 1:8:1 displays good sound absorption, which could be improved further by adding fillers. Because the airflow resistivity, resonance absorption, interface dissipation and interface reflection were combined organically in the sandwich structure, the composites show excellent low-frequency sound absorption performance. Moreover, the composite also has advantages in cost and functionalization aspects.

show abstract

“…With the fast urbanization and rapid growth of transportation, unwanted/excessive sound could have adverse effects on the work efficiency, living standards, and health of human beings [ 1 ]. Thereby, reducing noise by using sound absorption materials is of great importance to abate noise pollution [ 2 , 3 ]. Porous materials such as foams or aerogels have many channels so that sound waves are able to enter through them, and the porous materials are widely used to control noise as they can absorb most of the sound energy striking them.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Toughness and Sound Absorption Performance of Bio-Aerogel via Incorporation of Elastomer

Shen

Jiang

et al. 2022

Polymers

Self Cite

View full text Add to dashboard Cite

In this study, Arabic gum/ carboxylic butadiene-acrylonitrite latex aerogels (AG/XNBRL) hybrid aerogel was successfully prepared by a green method, i.e., the combination of latex compounding and vacuum freeze-drying process. After that, the obtained composites were subjected to a high temperature treatment to crosslink the rubber phase. It was found that the AG in the AG/XNBRL hybrid aerogel could act as a framework to improve the dimensional stability of the aerogel, while the XNBRL phase could significantly improve the mechanical flexibility of the ensuing composite. Compared to the AG aerogel which is highly brittle in nature, the AG/XNBRL hybrid aerogel not only exhibits significantly enhanced toughness, but also shows improved thermal stability and sound absorption performances; for instance, the half weight loss (50%) temperature and average sound adsorption coefficient for aerogel containing 30 wt% XNBRL is 344 °C and 0.585, respectively, which are superior to those of neat AG aerogel. Overall, this work provides novel inspiration to prepare the mechanical robust bio-based aerogel for the sound absorption application.

show abstract

Preparation and sound absorption properties of barium titanate/nitrile butadiene rubber-polyurethane foam composites with stratified structure

Abstract: BT/NBR-PU foam composites with two different stratified structures including double-layer and alternating multilayered have excellent low-frequency sound absorption performance.

Cited by 11 publications

References 38 publications

Halloysite-Decorated Mechanically Robust Polyurethane Nanocomposite Foams for Acoustic Relevance

Halloysite-Decorated Mechanically Robust Polyurethane Nanocomposite Foams for Acoustic Relevance

Structural Design and Sound Absorption Properties of Nitrile Butadiene Rubber-Polyurethane Foam Composites with Stratified Structure

Enhanced Toughness and Sound Absorption Performance of Bio-Aerogel via Incorporation of Elastomer

Contact Info

Product

Resources

About