We investigated the effect of the type and amount of expandable graphite (EG) and blackcurrant pomace (BCP) on the flammability, thermal stability, mechanical properties, physical, and chemical structure of viscoelastic polyurethane foams (VEF). For this purpose, the polyurethane foams containing EG, BCP, and EG with BCP were obtained. The content of EG varied in the range of 3-15 per hundred polyols (php), while the BCP content was 30 php. Based on the obtained results, it was found that the additional introduction of BCPs into EG-containing composites allows for an additive effect in improving the functional properties of viscoelastic polyurethane foams. As a result, the composite containing 30 php of BCP and 15 php of EG with the largest particle size and expanded volume shows the largest change in the studied parameters (hardness (H) = 2.65 kPa (+16.2%), limiting oxygen index (LOI) = 26% (+44.4%), and peak heat release rate (pHRR) = 15.5 kW/m (-87.4%)). In addition, this composite was characterized by the highest char yield (m = 17.9% (+44.1%)). In turn, the change in mechanical properties is related to a change in the physical and chemical structure of the foams as indicated by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) analysis.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8038687 | PMC |
| http://dx.doi.org/10.3390/ma14071801 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Catalytic Deconstruction of Commercial and End-of-Life Polyurethane with Heterogeneous Hydrogenation Catalyst.
ChemSusChem
January 2025
Qingdao University, College of Chemistry and Chemical Engineering, 308 Ningxia Road, Qingdao, CHINA.
Polyurethane (PU), as a thermoset polymer, is extensively utilized in various applications, such as refrigerator foams, sponges, elastomers, shoes, etc. However, the recycling of post-consumed PU poses significant challenges due to its intricate and extensive crosslinking structures. Catalytic hydrogenation is one of the most effective methods for recycling PU waste, nevertheless, there is currently a lack for a hydrogenation catalyst that is both high-performing, recyclable, and cost-effective for breaking down post-consumed PU materials.
View Article and Find Full Text PDFFoam-based antibacterial hydrogel composed of carboxymethyl cellulose/polyvinyl alcohol/cerium oxide nanoparticles for potential wound dressing.
Int J Biol Macromol
December 2024
Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University, Maslak, Istanbul, Turkey. Electronic address:
Foam-based wound dressing materials produced by dispersing gas phases in a polymeric material are soft, adapt to the body shape, and allow the absorption of wound exudate due to their porous structure. Most of these formulations are based on synthetic substances such as polyurethane. However, biopolymers have entered the field as a new player thanks to their biocompatible and sustainable nature.
View Article and Find Full Text PDFA systematic review of methodologies and solutions for recycling polyurethane foams to safeguard the environment.
Heliyon
December 2024
Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran.
Today, plastic plays a pervasive role in everyday life. Their improper disposal can create ongoing environmental challenges. Polyurethane (PU) is a polymer with elastomeric properties that exhibits significant adhesion and durability.
View Article and Find Full Text PDFThe Thermo-Oxidative Degradation of Polyurethane Open-Cell Soft Foam Investigated Through Gas Chromatography and Mass Spectrometry of Volatile Organic Compounds.
Polymers (Basel)
November 2024
Institute of Inorganic and Analytic Chemistry, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany.
Polyurethane (PUR) soft foams release malodorous and potentially toxic compounds when exposed to oxidative conditions. Current chamber test methods cannot distinguish between pre-existing volatiles and those formed during oxidation, nor can they assess the formation rates of oxidation products. We subjected PUR soft foam to oxidative treatment in a continuous air flow at 120 °C.
View Article and Find Full Text PDFToward Sustainable Polyurethane Foams: Effects of Corn Cob Fibers and Silver Nanoparticles on Mechanical Properties and Antimicrobial Activity.
ACS Omega
December 2024
Department of Mechanical Engineering, State University of Maringá, Colombo 5790, 87020-900 Maringá, PR, Brazil.
Polyurethane foams (PFs) are widely used in mattresses, upholstery, and insulation, but disposal is difficult due to the disintegration time and environmental hazards of synthetic polyol. This work investigates a sustainable alternative by replacing poly(ethylene glycol) (PEG) with corn cob fibers and incorporating antibacterial silver nanoparticles (AgNPs). Corn cob fibers and sodium hydroxide-treated fibers were used to make foams, with corn cob fibers substituting PEG at 5-30 wt %.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!