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Maamoun AA, Abouomar RM, El-Basheer TM, Azab MA, Zaki EG, Elsaeed SM, Elkhateeb A. Improving the acoustic performance of flexible polyurethane foam using biochar modified by (3-aminopropyl)trimethoxysilane coupling agent. Sci Rep 2024; 14:18382. [PMID: 39117693 PMCID: PMC11310357 DOI: 10.1038/s41598-024-68039-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Accepted: 07/18/2024] [Indexed: 08/10/2024] Open
Abstract
This study aims to investigate the potential of integrating natural biochar (BC) derived from eggshell waste into flexible polyurethane (FPU) foam to enhance its mechanical and acoustic performance. The study explores the impact of incorporating BC at various weight ratios (0.1, 0.3, 0.5, and 0.7 wt. %) on the properties of the FPU foam. Additionally, the effects of modifying the BC with (3-aminopropyl)trimethoxysilane (APTMS) at different ratios (10, 20, and 30 wt. %) and the influence of diverse particle sizes of BC on the thermal, mechanical, and acoustic characteristics of the FPU composite are investigated. The functional groups, morphology, and elemental composition of the developed FPU composites are analyzed using Fourier-transform infrared spectroscopy (FTIR), field-emission scanning electron microscopy (FESEM), and energy-dispersive X-ray (EDX) techniques. Characteristics such as density, gel fraction, and porosity were also assessed. The results reveal that the density of FPU foam increased by 4.32% and 7.83% while the porosity decreased to 50.22% and 47.05% with the addition of 0.1 wt. % of unmodified BC and modified BC with 20 wt. % APTMS, respectively, compared to unfilled FPU. Additionally, the gel fraction of the FPU matrix increases by 1.91% and 3.55% with the inclusion of 0.1 wt. % unmodified BC and modified BC with 20 wt. % APTMS, respectively. Furthermore, TGA analysis revealed that all FPU composites demonstrate improved thermal stability compared to unfilled FPU, reaching a peak value of 312.17°C for the FPU sample incorporating BC modified with 20 wt. % APTMS. Compression strength increased with 0.1 wt. % untreated BC but decreased at higher concentrations. Modifying BC with 20% APTMS resulted in an 8.23% increase in compressive strength compared to unfilled FPU. Acoustic analysis showed that the addition of BC improved absorption, and modified BC enhanced absorption characteristics of FPU, reaching Class D with a 20 mm thickness. BC modified with APTMS further improved acoustic properties compared to the unfilled FPU sample (Class E), with 20% modification showing the best results. These composites present promising materials for sound absorption applications and address environmental issues related to eggshell waste.
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Affiliation(s)
- Ahmed Abdelhamid Maamoun
- Department of Engineering Physics and Mathematics, Chemistry Division, Faculty of Engineering, Ain Shams University, 1 EL-Sarayat Street-Abdo Basha Sq., Cairo, 11517, Egypt.
| | | | - Tarek M El-Basheer
- Department of Acoustics, Mass and Force Metrology Division, National Institute of Standards (NIS), El-Sadat Street, El-Haram, El-Giza, 12211, Egypt
| | - Mostafa A Azab
- Egyptian Petroleum Research Institute, Nasr City, Cairo, 11727, Egypt
| | - ElSayed G Zaki
- Egyptian Petroleum Research Institute, Nasr City, Cairo, 11727, Egypt
| | - Shymaa M Elsaeed
- Egyptian Petroleum Research Institute, Nasr City, Cairo, 11727, Egypt
| | - Ahmed Elkhateeb
- Department of Architecture, Faculty of Engineering, Ain Shams University, 1 EL-Sarayat Street-Abdo Basha Sq., Cairo, 11517, Egypt
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2
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Paciorek-Sadowska J, Borowicz M, Isbrandt M. Evaluation of the Effect of Waste from Agricultural Production on the Properties of Flexible Polyurethane Foams. Polymers (Basel) 2023; 15:3529. [PMID: 37688155 PMCID: PMC10489904 DOI: 10.3390/polym15173529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/19/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
The management of by-products and waste from agriculture and the agri-food industry is a challenge for the plastics industry. Flexible polyurethane foams (EPPUR) containing ground corncake from corn oil production were obtained. The influence of the bio-filler on the physico-mechanical and thermal properties of synthesized flexible polyurethane foams was investigated. The content of corncake ranged from 0 php (part per 100 parts of polyol) to 10 php. Open-cell flexible polyurethane foams with a favorable comfort factor were obtained. The lower reactivity of the developed polyurethane systems was conducive to the formation of cells of slightly smaller sizes but of a more regular shape in comparison with the foam not modified with the bio-filler. Measurements of the mechanical properties indicated that the modified foams held had similar or even better properties than the reference sample without bio-filler.
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Affiliation(s)
- Joanna Paciorek-Sadowska
- Department of Chemistry and Technology of Polyurethanes, Faculty of Materials Engineering, Kazimierz Wielki University, J. K. Chodkiewicza Street 30, 85-064 Bydgoszcz, Poland; (M.B.); (M.I.)
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3
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Acosta AP, Kairytė A, Członka S, Miedzińska K, Aramburu AB, Barbosa KT, Amico SC, Delucis RDA. Rigid Polyurethane Biofoams Filled with Pine Seed Shell and Yerba Mate Wastes. Polymers (Basel) 2023; 15:polym15092194. [PMID: 37177340 PMCID: PMC10180977 DOI: 10.3390/polym15092194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 04/29/2023] [Accepted: 05/02/2023] [Indexed: 05/15/2023] Open
Abstract
Pine seed shells and yerba mate are common wastes leftover from the food and beverage industry. This study presents the development of rigid polyurethane foams (RPUFs) filled with pine seed shells and yerba mate at 5, 10 and 15 wt%. The fillers were characterized for chemical properties using bench chemistry analyses, and the RPUFs were investigated in terms of chemical, morphological, mechanical, thermal and colorimetric characteristics. The main results indicated that yerba mate showed good compatibility with the polyurethane system, probably because its available hydroxyl groups reacted with isocyanate groups to form urethane bonds, producing increases in mechanical and thermal properties. However, pine seed shell did not appear to be compatible. Anisotropy increased slightly, as there was an increase in the percentage of reinforcement. The mechanical properties of the yerba mate reinforced foams proved stable, while there was a loss of overall up to ~50% for all mechanical properties in those reinforced with pine seed shell. Thermal properties were improved up to ~40% for the yerba mate reinforced foams, while those reinforced with pine nuts were stable. It was possible to observe a decrease in the glass transition temperature (Tg) of ~-5 °C for the yerba mate reinforced foams and ~-14 °C for the pine seed shell reinforced ones.
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Affiliation(s)
- Andrey Pereira Acosta
- Postgraduate Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, Brazil
| | - Agnė Kairytė
- Laboratory of Thermal Insulating Materials and Acoustics, Institute of Building Materials, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Linkmenų St. 28, 08217 Vilnius, Lithuania
| | - Sylwia Członka
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland
| | - Karolina Miedzińska
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland
| | - Arthur Behenck Aramburu
- Postgraduate Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, Brazil
| | - Kelvin Techera Barbosa
- Postgraduate Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, Brazil
| | - Sandro Campos Amico
- Postgraduate Program in Mining, Metallurgical and Materials Engineering, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, Brazil
| | - Rafael de Avila Delucis
- Postgraduate Program in Materials Science and Engineering (PPGCEM), Technology Development Center, Federal University of Pelotas (UFPel), Pelotas 96010-610, Brazil
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Zhang X, Yuan D, Sun S, Li H, Wang Z, Xie H. Study on the thermal stability and combustion performance of polyurethane foams modified with manganese phytate. INT POLYM PROC 2023. [DOI: 10.1515/ipp-2022-4278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2023]
Abstract
Abstract
A new environmental friendly flame retardant manganese phytate (MnPa) was prepared by a direct precipitation method and the polyurethane foam (PUF) modified with MnPa was obtained by a one-step all-water foaming method. The thermal stability and combustion performance of the MnPa-modified PUF (MnPUF) were investigated by using thermogravimetric (TG), thermal decomposition kinetics, smoke density characterization, limiting oxygen index (LOI) and UL-94 horizontal combustion test. The results indicated that the addition of MnPa significantly improved the thermal stability and combustion performance of the modified PUF. On the basis of the thermogravimetric analysis, Flynn-Wall-Ozawa method, Kissinger method and Coats Redfern method, it could be concluded that PUF with 7.5 wt% MnPa (MnPUF3) had the highest activation energy and the best thermal stability. Smoke density analysis, LOI and horizontal combustion analysis also showed that the addition of MnPa was positively correlated with smoke suppression, LOI value and burning time. The current research results can provide a reference for the subsequent flame retardant modification of PUF.
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Affiliation(s)
- Xu Zhang
- Liaoning Key Laboratory of Aircraft Fire Explosion Control and Reliability Airworthiness Technology , Shenyang Aerospace University , Shenyang 110136 , China
- School of Safety Engineering , Shenyang Aerospace University , Shenyang 110136 , China
| | - Dehe Yuan
- Liaoning Key Laboratory of Aircraft Fire Explosion Control and Reliability Airworthiness Technology , Shenyang Aerospace University , Shenyang 110136 , China
- School of Safety Engineering , Shenyang Aerospace University , Shenyang 110136 , China
| | - Simiao Sun
- Liaoning Key Laboratory of Aircraft Fire Explosion Control and Reliability Airworthiness Technology , Shenyang Aerospace University , Shenyang 110136 , China
- School of Safety Engineering , Shenyang Aerospace University , Shenyang 110136 , China
| | - Handong Li
- Liaoning Key Laboratory of Aircraft Fire Explosion Control and Reliability Airworthiness Technology , Shenyang Aerospace University , Shenyang 110136 , China
- School of Safety Engineering , Shenyang Aerospace University , Shenyang 110136 , China
| | - Zhi Wang
- Liaoning Key Laboratory of Aircraft Fire Explosion Control and Reliability Airworthiness Technology , Shenyang Aerospace University , Shenyang 110136 , China
- School of Safety Engineering , Shenyang Aerospace University , Shenyang 110136 , China
| | - Hua Xie
- Liaoning Key Laboratory of Aircraft Fire Explosion Control and Reliability Airworthiness Technology , Shenyang Aerospace University , Shenyang 110136 , China
- School of Safety Engineering , Shenyang Aerospace University , Shenyang 110136 , China
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Rigid Polyurethane Biofoams Filled with Chemically Compatible Fruit Peels. Polymers (Basel) 2022; 14:polym14214526. [PMID: 36365520 PMCID: PMC9654621 DOI: 10.3390/polym14214526] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 10/22/2022] [Accepted: 10/24/2022] [Indexed: 11/28/2022] Open
Abstract
Banana and bergamot peels are underutilized byproducts of the essential oil and juice-processing industry. This study was designed for the development of rigid polyurethane foam (RPUF) composites using polysaccharide-rich fruit peels as fillers. These fillers were characterized for chemical properties using wet analyses. Additionally, the influences of the filler type and filler content on morphological, thermal, mechanical, hygroscopic, and colorimetric properties of the RPUF were investigated. The main results indicated that, in a comparison with the neat RPUF, the insertion of up to 15% of fillers yielded similar water uptake, apparent density, compressive strength, and color properties, as well as increases up to 115% in thermal stability and up to 80% in cell size.
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Mirski R, Walkiewicz J, Dukarska D, Derkowski A. Morphological Features of PUR-Wood Particle Composite Foams. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6741. [PMID: 36234081 PMCID: PMC9571402 DOI: 10.3390/ma15196741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/18/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
The aim of this study was to apply waste wood particles (WP) with different sizes from primary wood processing as a filler for open-cell PUR foams. For this purpose, various wood particle sizes were added as a filler for polyurethane foams (PUR). The effects of the addition of of 0.05−<0.125 mm, 0.125−<0.315 mm, 0.315−1.25 mm, and >1.25−2.0 of WP to the polyurethane matrix on the density, the kinetics of PUR foaming, the cell structure, and the morphology were investigated. Scanning electron microscope (SEM) and X-ray computer tomography were used. Based on the results, it was found that the addition of WP in the amount of 10% leads to an increase in density with an increase in particle size. The research shows that the morphology of the PUR-WP foam is influenced by its particle size. The difference in the number and size of cells in PUR-WP composites depends on the wood particle size. The addition of dust causes the formation of cells of much smaller sizes; confirmed by SEM images. Moreover, computer tomography clearly demonstrates that the WP are well-dispersed within the foams’ structures.
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7
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A Review of Rigid Polymeric Cellular Foams and Their Greener Tannin-Based Alternatives. Polymers (Basel) 2022; 14:polym14193974. [PMID: 36235923 PMCID: PMC9572835 DOI: 10.3390/polym14193974] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/12/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
This review focuses on the description of the main processes and materials used for the formulation of rigid polymer foams. Polyurethanes and their derivatives, as well as phenolic systems, are described, and their main components, foaming routes, end of life, and recycling are considered. Due to environmental concerns and the need to find bio-based alternatives for these products, special attention is given to a recent class of polymeric foams: tannin-based foams. In addition to their formulation and foaming procedures, their main structural, thermal, mechanical, and fire resistance properties are described in detail, with emphasis on their advanced applications and recycling routes. These systems have been shown to possess very interesting properties that allow them to be considered as potential substitutes for non-renewable rigid polymeric cellular foams.
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8
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Olszewski A, Kosmela P, Żukowska W, Wojtasz P, Szczepański M, Barczewski M, Zedler Ł, Formela K, Hejna A. Insights into Stoichiometry Adjustments Governing the Performance of Flexible Foamed Polyurethane/Ground Tire Rubber Composites. Polymers (Basel) 2022; 14:polym14183838. [PMID: 36145981 PMCID: PMC9503757 DOI: 10.3390/polym14183838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/07/2022] [Accepted: 09/09/2022] [Indexed: 11/16/2022] Open
Abstract
Polyurethanes (PU) are widely applied in the industry due to their tunable performance adjusted by changes in the isocyanate index—stoichiometric balance between isocyanate and hydroxyl groups. This balance is affected by the incorporation of modifiers of fillers into the PU matrix and is especially crucial for PU foams due to the additional role of isocyanates—foaming of the material. Despite the awareness of the issue underlined in research works, the contribution of additives into formulations is often omitted, adversely impacting foams’ performance. Herein, flexible foamed PU/ground tire rubber (GTR) composites containing 12 different types of modified GTR particles differing by hydroxyl value (LOH) (from 45.05 to 88.49 mg KOH/g) were prepared. The impact of GTR functionalities on the mechanical, thermomechanical, and thermal performance of composites prepared with and without considering the LOH of fillers was assessed. Formulation adjustments induced changes in tensile strength (92–218% of the initial value), elongation at break (78–100%), tensile toughness (100–185%), compressive strength (156–343%), and compressive toughness (166–310%) proportional to the shift of glass transition temperatures (3.4–12.3 °C) caused by the additional isocyanates’ reactions yielding structure stiffening. On the other hand, formulation adjustments reduced composites’ thermal degradation onset due to the inferior thermal stability of hard segments compared to soft segments. Generally, changes in the composites’ performance resulting from formulation adjustments were proportional to the hydroxyl values of GTR, justifying the applied approach.
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Affiliation(s)
- Adam Olszewski
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Paulina Kosmela
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Wiktoria Żukowska
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Paweł Wojtasz
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Mariusz Szczepański
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Mateusz Barczewski
- Institute of Materials Technology, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland
| | - Łukasz Zedler
- Department of Molecular Biotechnology and Microbiology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Krzysztof Formela
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Aleksander Hejna
- Department of Polymer Technology, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland
- Correspondence:
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9
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Okrasa M, Leszczyńska M, Sałasińska K, Szczepkowski L, Kozikowski P, Nowak A, Szulc J, Adamus-Włodarczyk A, Gloc M, Majchrzycka K, Ryszkowska J. Viscoelastic Polyurethane Foams with Reduced Flammability and Cytotoxicity. MATERIALS (BASEL, SWITZERLAND) 2021; 15:151. [PMID: 35009298 PMCID: PMC8746040 DOI: 10.3390/ma15010151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 12/11/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Consistent and proper use of respiratory protective devices (RPD) is one of the essential actions that can be taken to reduce the risk of exposure to airborne hazards, i.e., biological and nonbiological aerosols, vapours, and gases. Proper fit of the facepiece and comfort properties of RPDs play a crucial role in effective protection and acceptance of RPDs by workers. The objective of the present paper was to develop viscoelastic polyurethane foams for use in RPD seals characterised by proper elasticity, allowing for the enhancement of the device fit to the face and the capability of removing moisture from the skin in order to improve the comfort of RPD use. Moreover, it was pivotal to ensure the non-flammability of the foams, as well as a simultaneous reduction in their cytotoxicity. The obtained foams were characterised using scanning electron microscopy, infrared spectroscopy, thermogravimetry, and differential scanning calorimetry. Measurements also involved gel fraction, apparent density, compression set, rebound resilience, wettability, flammability, and cytotoxicity. The results are discussed in the context of the impact of modifications to the foam formulation (i.e., flame-retardant type and content) on the desired foam properties. The test results set directions for future works aimed to develop viscoelastic polyurethane foams that could be applied in the design of respiratory protective devices.
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Affiliation(s)
- Małgorzata Okrasa
- Department of Personal Protective Equipment, Central Institute for Labour Protection—National Research Institute, Wierzbowa 48, 90-133 Lodz, Poland; (A.A.-W.); (K.M.)
| | - Milena Leszczyńska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warszawa, Poland; (M.L.); (K.S.); (M.G.); (J.R.)
| | - Kamila Sałasińska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warszawa, Poland; (M.L.); (K.S.); (M.G.); (J.R.)
- Department of Chemical, Aerosol and Biological Hazards, Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warszawa, Poland;
| | | | - Paweł Kozikowski
- Department of Chemical, Aerosol and Biological Hazards, Central Institute for Labour Protection—National Research Institute, Czerniakowska 16, 00-701 Warszawa, Poland;
| | - Adriana Nowak
- Department of Environmental Biotechnology, Lodz University of Technology, 90-530 Lodz, Poland; (A.N.); (J.S.)
| | - Justyna Szulc
- Department of Environmental Biotechnology, Lodz University of Technology, 90-530 Lodz, Poland; (A.N.); (J.S.)
| | - Agnieszka Adamus-Włodarczyk
- Department of Personal Protective Equipment, Central Institute for Labour Protection—National Research Institute, Wierzbowa 48, 90-133 Lodz, Poland; (A.A.-W.); (K.M.)
| | - Michał Gloc
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warszawa, Poland; (M.L.); (K.S.); (M.G.); (J.R.)
| | - Katarzyna Majchrzycka
- Department of Personal Protective Equipment, Central Institute for Labour Protection—National Research Institute, Wierzbowa 48, 90-133 Lodz, Poland; (A.A.-W.); (K.M.)
| | - Joanna Ryszkowska
- Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warszawa, Poland; (M.L.); (K.S.); (M.G.); (J.R.)
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Vermiculite Filler Modified with Casein, Chitosan, and Potato Protein as a Flame Retardant for Polyurethane Foams. Int J Mol Sci 2021; 22:ijms221910825. [PMID: 34639165 PMCID: PMC8509235 DOI: 10.3390/ijms221910825] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 09/30/2021] [Accepted: 10/04/2021] [Indexed: 02/07/2023] Open
Abstract
In this study, polyurethane (PU) composite foams were modified with 2 wt.% of vermiculite fillers, which were themselves modified with casein, chitosan, and potato protein. The impact of the fillers on selected properties of the obtained composites, including their rheological (foaming behavior, dynamic viscosity), thermal (temperature of thermal decomposition stages), flame-retardant (e.g., limiting oxygen index, ignition time, heat peak release), and mechanical properties (toughness, compressive strength (parallel and perpendicular), flexural strength) were investigated. Among all the modified polyurethane composites, the greatest improvement was noticed in the PU foams filled with vermiculite modified with casein and chitosan. For example, after the addition of modified vermiculite fillers, the foams' compressive strength was enhanced by ~6-18%, their flexural strength by ~2-10%, and their toughness by ~1-5%. Most importantly, the polyurethane composites filled with vermiculite filler and modified vermiculite fillers exhibited improved flame resistance characteristics (the value of total smoke release was reduced by ~34%, the value of peak heat release was reduced by ~25%).
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Kairytė A, Członka S, Boris R, Vėjelis S. Evaluation of the Performance of Bio-Based Rigid Polyurethane Foam with High Amounts of Sunflower Press Cake Particles. MATERIALS 2021; 14:ma14195475. [PMID: 34639873 PMCID: PMC8509374 DOI: 10.3390/ma14195475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/17/2021] [Accepted: 09/20/2021] [Indexed: 01/16/2023]
Abstract
In the current study, rigid polyurethane foam (PUR) was modified with 10-30 wt.% sunflower press cake (SFP) filler, and its effect on performance characteristics-i.e., rheology, characteristic foaming times, apparent density, thermal conductivity, compressive strength parallel and perpendicular to the foaming directions, tensile strength, and short-term water absorption by partial immersion-was evaluated. Microstructural and statistical analyses were implemented as well. During the study, it was determined that 10-20 wt.% SFP filler showed the greatest positive impact. For instance, the thermal conductivity value improved by 9% and 17%, respectively, while mechanical performance, i.e., compressive strength, increased by 11% and 28% in the perpendicular direction and by 43% and 67% in the parallel direction. Moreover, tensile strength showed 49% and 61% increments, respectively, at 10 wt.% and 20 wt.% SFP filler. Most importantly, SFP filler-modified PUR foams were characterised by two times lower water absorption values and improved microstructures with a reduced average cell size and increased content in closed cells.
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Affiliation(s)
- Agnė Kairytė
- Laboratory of Thermal Insulating Materials and Acoustics, Faculty of Civil Engineering, Institute of Building Materials, Vilnius Gediminas Technical University, Linkmenu Str. 28, LT-08217 Vilnius, Lithuania;
- Correspondence:
| | - Sylwia Członka
- Institute of Polymer & Dye Technology, Lodz University of Technology, 90-924 Lodz, Poland;
| | - Renata Boris
- Laboratory of Composite Materials, Faculty of Civil Engineering, Institute of Building Materials, Vilnius Gediminas Technical University, Linkmenu Str. 28, LT-08217 Vilnius, Lithuania;
| | - Sigitas Vėjelis
- Laboratory of Thermal Insulating Materials and Acoustics, Faculty of Civil Engineering, Institute of Building Materials, Vilnius Gediminas Technical University, Linkmenu Str. 28, LT-08217 Vilnius, Lithuania;
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Effect of Evening Primrose ( Oenothera biennis) Oil Cake on the Properties of Polyurethane/Polyisocyanurate Bio-Composites. Int J Mol Sci 2021; 22:ijms22168950. [PMID: 34445654 PMCID: PMC8396507 DOI: 10.3390/ijms22168950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/17/2021] [Accepted: 08/19/2021] [Indexed: 01/18/2023] Open
Abstract
Rigid polyurethane/polyisocyanurate (RPU/PIR) foam formulations were modified by evening primrose (Oenothera biennis) oil cake as a bio-filler in the amount of 5 to 50 wt.%. The obtained foams were tested in terms of processing parameters, cellular structure (SEM analysis), physico-mechanical properties (apparent density, compressive strength, brittleness, accelerated aging tests), thermal insulation properties (thermal conductivity coefficient, closed cells content, absorbability and water absorption), flammability, smoke emission, and thermal properties. The obtained results showed that the amount of bio-filler had a significant influence on the morphology of the modified foams. Thorough mixing of the polyurethane premix allowed better homogenization of the bio-filler in the polyurethane matrix, resulting in a regular cellular structure. This resulted in an improvement in the physico-mechanical and thermal insulation properties as well as a reduction in the flammability of the obtained materials. This research provided important information on the management of the waste product from the edible oil industry and the production process of fire-safe RPU/PIR foams with improved performance properties. Due to these beneficial effects, it was found that the use of evening primrose oil cake as a bio-filler for RPU/PIR foams opens a new way of waste management to obtain new “green” materials.
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13
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Członka S, Kairytė A, Miedzińska K, Strąkowska A. Casein/Apricot Filler in the Production of Flame-Retardant Polyurethane Composites. MATERIALS (BASEL, SWITZERLAND) 2021; 14:3620. [PMID: 34209539 PMCID: PMC8269618 DOI: 10.3390/ma14133620] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/23/2021] [Accepted: 06/26/2021] [Indexed: 01/03/2023]
Abstract
Polyurethane (PUR) composites reinforced with 1, 2, and 5 wt.% of apricot filler modified with casein were synthesized in the following study. The impact of 1, 2, and 5 wt.% of casein/apricot filler on the cellular structure and physico-mechanical performances of reinforced PUR composites were determined. It was found that the incorporation of 1 and 2 wt.% of casein/apricot filler resulted in the production of PUR composites with improved selected physical, thermal, and mechanical properties, while the addition of 5 wt.% of casein/apricot filler led to some deterioration of their physico-mechanical performance. The best results were obtained for PUR composites reinforced with 2 wt.% of casein/apricot filler. Those composites were characterized by a uniform structure and a high content of closed cells. Compared with the reference foam, the incorporation of 2 wt.% of casein/apricot filler resulted in improvement in compressive strength, flexural strength, impact strength, and dynamic mechanical properties-such as glass transition temperature and storage modulus. Most importantly, PUR composites showed better fire resistance and thermal stability due to the good thermal performance of casein. The main aim of this article is to determine the influence of the natural combination of the apricot filler and casein on the mechanical properties and flammability of the obtained composites.
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Affiliation(s)
- Sylwia Członka
- Institute of Polymer & Dye Technology, Lodz University of Technology, 90-924 Lodz, Poland; (K.M.); (A.S.)
| | - Agnė Kairytė
- Laboratory of Thermal Insulating Materials and Acoustics, Faculty of Civil Engineering, Institute of Building Materials, Vilnius Gediminas Technical University, Linkmenu St. 28, 08217 Vilnius, Lithuania;
| | - Karolina Miedzińska
- Institute of Polymer & Dye Technology, Lodz University of Technology, 90-924 Lodz, Poland; (K.M.); (A.S.)
| | - Anna Strąkowska
- Institute of Polymer & Dye Technology, Lodz University of Technology, 90-924 Lodz, Poland; (K.M.); (A.S.)
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14
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Zhang J, Hori N, Takemura A. Reinforcement of agricultural wastes liquefied polyols based polyurethane foams by agricultural wastes particles. J Appl Polym Sci 2021. [DOI: 10.1002/app.50583] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jingmiao Zhang
- Key Laboratory of Low‐grade Energy Utilization Technologies and Systems Chongqing University, Ministry of Education Chongqing China
- Institute of Engineering Thermophysics Chongqing University Chongqing China
- Laboratory of Adhesive Science and Bio‐composites, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan
| | - Naruhito Hori
- Laboratory of Adhesive Science and Bio‐composites, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan
| | - Akio Takemura
- Laboratory of Adhesive Science and Bio‐composites, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan
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15
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One-step synthesis and characteristics of LiOH-castor oil based stable polyurethane foam. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02580-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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16
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Maillard D, Osso E, Faye A, Li H, Ton‐That M, Stoeffler K. Influence of lignin's
pH
on polyurethane flexible foam formation and how to control it. J Appl Polym Sci 2021. [DOI: 10.1002/app.50319] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Damien Maillard
- Polymer Bioproducts Research Team, Automotive and Surface Transportation research Center National Research Council of Canada Boucherville Canada
| | - Esthel Osso
- Polymer Bioproducts Research Team, Automotive and Surface Transportation research Center National Research Council of Canada Boucherville Canada
| | - Adrien Faye
- Polymer Bioproducts Research Team, Automotive and Surface Transportation research Center National Research Council of Canada Boucherville Canada
| | - Hongbo Li
- Polymer Bioproducts Research Team, Automotive and Surface Transportation research Center National Research Council of Canada Boucherville Canada
| | - Minh‐Tan Ton‐That
- Polymer Bioproducts Research Team, Automotive and Surface Transportation research Center National Research Council of Canada Boucherville Canada
| | - Karen Stoeffler
- Polymer Bioproducts Research Team, Automotive and Surface Transportation research Center National Research Council of Canada Boucherville Canada
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17
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Biobased Polyurethane Composite Foams Reinforced with Plum Stones and Silanized Plum Stones. Int J Mol Sci 2021; 22:ijms22094757. [PMID: 33946213 PMCID: PMC8124782 DOI: 10.3390/ijms22094757] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 12/23/2022] Open
Abstract
In the following study, ground plum stones and silanized ground plum stones were used as natural fillers for novel polyurethane (PUR) composite foams. The impact of 1, 2, and 5 wt.% of fillers on the cellular structure, foaming parameters, and mechanical, thermomechanical, and thermal properties of produced foams were assessed. The results showed that the silanization process leads to acquiring fillers with a smoother surface compared to unmodified filler. The results also showed that the morphology of the obtained materials is affected by the type and content of filler. Moreover, the modified PUR foams showed improved properties. For example, compared with the reference foam (PUR_REF), the foam with the addition of 1 wt.% of unmodified plum filler showed better mechanical properties, such as higher compressive strength (~8% improvement) and better flexural strength (~6% improvement). The addition of silanized plum filler improved the thermal stability and hydrophobic character of PUR foams. This work shows the relationship between the mechanical, thermal, and application properties of the obtained PUR composites depending on the modification of the filler used during synthesis.
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18
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Oliwa R, Ryszkowska J, Oleksy M, Auguścik-Królikowska M, Gzik M, Bartoń J, Budzik G. Effects of Various Types of Expandable Graphite and Blackcurrant Pomace on the Properties of Viscoelastic Polyurethane Foams. MATERIALS (BASEL, SWITZERLAND) 2021; 14:1801. [PMID: 33917343 PMCID: PMC8038687 DOI: 10.3390/ma14071801] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/30/2021] [Accepted: 03/31/2021] [Indexed: 11/16/2022]
Abstract
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/m2 (-87.4%)). In addition, this composite was characterized by the highest char yield (m600 = 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.
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Affiliation(s)
- Rafał Oliwa
- Department of Polymer Composites, Faculty of Chemistry, Rzeszow University of Technology, PL-35959 Rzeszow, Poland;
| | - Joanna Ryszkowska
- Department of Ceramics and Polymers, Faculty of Materials Science and Engineering, Warsaw University of Technology, PL-02507 Warsaw, Poland; (J.R.); (M.A.-K.); (M.G.); (J.B.)
| | - Mariusz Oleksy
- Department of Polymer Composites, Faculty of Chemistry, Rzeszow University of Technology, PL-35959 Rzeszow, Poland;
| | - Monika Auguścik-Królikowska
- Department of Ceramics and Polymers, Faculty of Materials Science and Engineering, Warsaw University of Technology, PL-02507 Warsaw, Poland; (J.R.); (M.A.-K.); (M.G.); (J.B.)
| | - Małgorzata Gzik
- Department of Ceramics and Polymers, Faculty of Materials Science and Engineering, Warsaw University of Technology, PL-02507 Warsaw, Poland; (J.R.); (M.A.-K.); (M.G.); (J.B.)
| | - Joanna Bartoń
- Department of Ceramics and Polymers, Faculty of Materials Science and Engineering, Warsaw University of Technology, PL-02507 Warsaw, Poland; (J.R.); (M.A.-K.); (M.G.); (J.B.)
| | - Grzegorz Budzik
- Department of Mechanical Engineering, Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology, PL-35959 Rzeszow, Poland;
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19
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Członka S, Kairytė A, Miedzińska K, Strąkowska A, Adamus-Włodarczyk A. Mechanically Strong Polyurethane Composites Reinforced with Montmorillonite-Modified Sage Filler ( Salvia officinalis L.). Int J Mol Sci 2021; 22:3744. [PMID: 33916847 PMCID: PMC8038432 DOI: 10.3390/ijms22073744] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 03/30/2021] [Accepted: 04/01/2021] [Indexed: 01/10/2023] Open
Abstract
Rigid polyurethane (PUR) foams reinforced with 1, 2, and 5 wt.% of salvia filler (SO filler) and montmorillonite-modified salvia filler (MMT-modified SO filler) were produced in the following study. The impact of 1, 2, and 5 wt.% of SO filler and MMT-modified SO filler on the morphological, chemical, and mechanical properties of PUR composites were examined. In both cases, the addition of 1 and 2 wt.% of SO fillers resulted in the synthesis of PUR composites with improved physicomechanical properties, while the addition of 5 wt.% of SO fillers resulted in the formation of PUR composites with a less uniform structure and, therefore, some deterioration in their physicomechanical performances. Moreover, the results showed that the modification of SO filler with MMT improved the interphase compatibility between filler surface and PUR matrix. Therefore, such reinforced PUR composites were characterized by a well-developed closed-cell structure and improved mechanical, thermal, and flame-retardant performances. For example, when compared with reference foam, the addition of 2 wt.% of MMT-modified SO filler resulted in the formation of PUR composites with greater mechanical properties (compressive strength, flexural strength) and improved dynamic-mechanical properties (storage modulus). The PUR composites were characterized by better thermal stability as well as improved flame retardancy-e.g., decreased peak rate of heat release (pHRR), reduced total smoke release (TSR), and increased limiting oxygen index (LOI).
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Affiliation(s)
- Sylwia Członka
- Faculty of Chemistry, Institute of Polymer & Dye Technology, Lodz University of Technology, 90-924 Lodz, Poland
| | - Agnė Kairytė
- Laboratory of Thermal Insulating Materials and Acoustics, Faculty of Civil Engineering, Institute of Building Materials, Vilnius Gediminas Technical University, Linkmenu St. 28, LT-08217 Vilnius, Lithuania
| | - Karolina Miedzińska
- Faculty of Chemistry, Institute of Polymer & Dye Technology, Lodz University of Technology, 90-924 Lodz, Poland
| | - Anna Strąkowska
- Faculty of Chemistry, Institute of Polymer & Dye Technology, Lodz University of Technology, 90-924 Lodz, Poland
| | - Agnieszka Adamus-Włodarczyk
- Faculty of Chemistry, Institute of Applied Radiation Chemistry, Lodz University of Technology, 93-590 Lodz, Poland
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20
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Viscoelastic Polyurethane Foams for Use in Seals of Respiratory Protective Devices. MATERIALS 2021; 14:ma14071600. [PMID: 33805934 PMCID: PMC8036923 DOI: 10.3390/ma14071600] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/12/2021] [Accepted: 03/20/2021] [Indexed: 12/18/2022]
Abstract
A key factor in effective protection against airborne hazards, i.e., biological and nonbiological aerosols, vapors, and gases, is a good face fit of respiratory protective devices (RPDs). Equally important is the comfort of use, which may encourage or discourage users from donning RPDs. The objective of the work was to develop viscoelastic polyurethane foams for use in RPD seals. The obtained foams were characterized using scanning electron microscopy, infrared spectroscopy, thermogravimetry, and differential scanning calorimetry. Measurements also involved gel fraction, apparent density, air permeability, elastic recovery time, compression set, rebound resilience, and sweat uptake. The results were discussed in the context of modifications to the foam formulation: the isocyanate index (INCO) in the range of 0.6–0.9 and the blowing agent content in the range of 1.2–3.0 php. FTIR analysis revealed a higher level of urea groups with increasing water content in the formulation. Higher INCO and water content levels also led to lower onset temperatures of thermal degradation and higher glass-transition temperatures of the soft phase. A decrease in apparent density and an increase in mean pore sizes of the foams with increasing INCO and water content levels was observed. Functional parameters (air permeability, elastic recovery time, compression set, rebound resilience, and sweat uptake) were also found to be satisfactory at lower INCO and water content levels.
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21
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Kuranchie C, Yaya A, Bensah YD. The effect of natural fibre reinforcement on polyurethane composite foams – A review. SCIENTIFIC AFRICAN 2021. [DOI: 10.1016/j.sciaf.2021.e00722] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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22
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Saha P, Aloui H, Yun J, Kim H, Kim BS. Development of a novel composite film based on polyurethane and defatted
Chlorella
biomass: Physical and functional characterization. J Appl Polym Sci 2020. [DOI: 10.1002/app.50152] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Pathikrit Saha
- Department of Chemical Engineering Chungbuk National University Cheongju Republic of Korea
| | - Hajer Aloui
- Department of Chemical Engineering Chungbuk National University Cheongju Republic of Korea
| | - Jin‐Ho Yun
- Cell Factory Research Center Korea Research Institute of Bioscience and Biotechnology Daejeon Republic of Korea
| | - Hee‐Sik Kim
- Cell Factory Research Center Korea Research Institute of Bioscience and Biotechnology Daejeon Republic of Korea
| | - Beom Soo Kim
- Department of Chemical Engineering Chungbuk National University Cheongju Republic of Korea
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23
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Implementation of Circular Economy Principles in the Synthesis of Polyurethane Foams. Polymers (Basel) 2020; 12:polym12092068. [PMID: 32932605 PMCID: PMC7569902 DOI: 10.3390/polym12092068] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 11/16/2022] Open
Abstract
The main strategy of the European Commission in the field of the building industry assumes a reduction of greenhouse gas emissions by up to 20% by 2020 and by up to 80% by 2050. In order to meet these conditions, it is necessary to develop not only efficient thermal insulation materials, but also more environmentally friendly ones. This paper describes an experiment in which two types of bio-polyols were obtained using transesterification of used cooking oil with triethanolamine (UCO_TEA) and diethylene glycol (UCO_DEG). The bio-polyols were next used to prepare low-density rigid polyurethane (PUR) foams. It was found that the bio-polyols increased the reactivity of the PUR systems, regardless of their chemical structures. The reactivity of the system modified with 60% of the diethylene glycol-based bio-polyol was higher than in the case of the reference system. The bio-foams exhibited apparent densities of 41-45 kg/m3, homogeneous cellular structures and advantageous values of the coefficient of thermal conductivity. It was observed that the higher functionality of bio-polyol UCO_TEA compared with UCO_DEG had a beneficial effect on the mechanical and thermal properties of the bio-foams. The most promising results were obtained in the case of the foams modified in 60% with the bio-polyol based on triethanoloamine. In conclusion, this approach, utilizing used cooking oil in the synthesis of high-value thermal insulating materials, provides a sustainable municipal waste recycling solution.
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24
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Xu W, Chen R, Du Y, Wang G. Design water-soluble phenolic/zeolitic imidazolate framework-67 flame retardant coating via layer-by-layer assembly technology: Enhanced flame retardancy and smoke suppression of flexible polyurethane foam. Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109152] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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25
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Członka S, Strąkowska A, Pospiech P, Strzelec K. Effects of Chemically Treated Eucalyptus Fibers on Mechanical, Thermal and Insulating Properties of Polyurethane Composite Foams. MATERIALS 2020; 13:ma13071781. [PMID: 32290106 PMCID: PMC7179037 DOI: 10.3390/ma13071781] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/06/2020] [Accepted: 04/07/2020] [Indexed: 02/05/2023]
Abstract
In this work, rigid polyurethane (PUR) foams were prepared by incorporating 2 wt% of eucalyptus fibers. The eucalyptus fibers were surface-modified by maleic anhydride, alkali, and silane (triphenylsilanol) treatment. The impact of the modified eucalyptus fibers on the mechanical, thermal, and fire performances of polyurethane foams was analyzed. It was observed that the addition of eucalyptus fibers showed improved mechanical and thermal properties and the best properties were shown by silane-treated fibers with a compressive strength of 312 kPa and a flexural strength of 432 kPa. Moreover, the thermal stability values showed the lowest decline for polyurethane foams modified with the silane-treated fibers, due to the better thermal stability of such modified fibers. Furthermore, the flame resistance of polyurethane foams modified with the silane-treated fibers was also the best among the studied composites. A cone calorimetry test showed a decrease in the peak of heat release from 245 to 110 kW∙m−2 by the incorporation of silane-treated fibers. Furthermore, total heat release and total smoke release were also found to decrease remarkably upon the incorporation of silane-treated fibers. The value of limiting oxygen index was increased from 20.2% to 22.1%. Char residue was also found to be increased from 24.4% to 28.3%. It can be concluded that the application of chemically modified eucalyptus fibers has great potential as an additive to incorporate good mechanical, thermal, and fire properties in rigid polyurethane foams.
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Affiliation(s)
- Sylwia Członka
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland; (A.S.); (K.S.)
- Correspondence:
| | - Anna Strąkowska
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland; (A.S.); (K.S.)
| | - Piotr Pospiech
- Centre of Papermaking and Printing, Lodz University of Technology, Wolczanska 223, 90-924 Lodz, Poland;
| | - Krzysztof Strzelec
- Institute of Polymer and Dye Technology, Faculty of Chemistry, Lodz University of Technology, Stefanowskiego 12/16, 90-924 Lodz, Poland; (A.S.); (K.S.)
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26
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Mania S, Partyka K, Pilch J, Augustin E, Cieślik M, Ryl J, Jinn JR, Wang YJ, Michałowska A, Tylingo R. Obtaining and Characterization of the PLA/Chitosan Foams with Antimicrobial Properties Achieved by the Emulsification Combined with the Dissolution of Chitosan by CO 2 Saturation. Molecules 2019; 24:molecules24244532. [PMID: 31835739 PMCID: PMC6943705 DOI: 10.3390/molecules24244532] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/28/2019] [Accepted: 12/09/2019] [Indexed: 11/16/2022] Open
Abstract
A new method of obtaining functional foam material has been proposed. The materials were created by mixing the poly lactic acid (PLA) solution in chloroform, chitosan (CS) dissolved in water saturated with CO2 and polyethylene glycol (PEG), and freeze-dried for removal of the solvents. The composite foams were characterized for their structural (SEM, FT-IR, density, porosity), thermal (DSC), functional (hardness, elasticity, swelling capacity, solubility), and biological (antimicrobial and cytotoxic) properties. Chitosan in the composites was a component for obtaining their foamed form with 7.4 to 22.7 times lower density compared to the neat PLA and high porosity also confirmed by the SEM. The foams had a hardness in the range of 70-440 kPa. The FT-IR analysis confirmed no new chemical bonds between the sponge ingredients. Other results showed low sorption capacity (2.5-7.2 g/g) and solubility of materials (less than 0.2%). The obtained foams had the lower Tg value and improved ability of crystallization compared to neat PLA. The addition of chitosan provides the bacteriostatic and bactericidal properties against Escherichia coli and Staphylococcus aureus. Biocompatibility studies have shown that the materials obtained are not cytotoxic to the L929 cell line.
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Affiliation(s)
- Szymon Mania
- Department of Chemistry, Technology and Biotechnology of Food, Faculty of Chemistry, Gdansk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland;
- Correspondence: ; Tel.: +48-58-347-28-56
| | | | - Joanna Pilch
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland; (J.P.); (E.A.)
| | - Ewa Augustin
- Department of Pharmaceutical Technology and Biochemistry, Faculty of Chemistry, Gdansk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland; (J.P.); (E.A.)
| | - Mateusz Cieślik
- Department of Electrochemistry, Corrosion and Material Engineering, Faculty of Chemistry, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland; (M.C.); (J.R.)
| | - Jacek Ryl
- Department of Electrochemistry, Corrosion and Material Engineering, Faculty of Chemistry, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland; (M.C.); (J.R.)
| | - Jia-Rong Jinn
- Department of Food Science, University of Arkansas, 2650 N. Young Ave., Fayetteville, AR 72704, USA; (J.-R.J.); (Y.-J.W.)
| | - Ya-Jane Wang
- Department of Food Science, University of Arkansas, 2650 N. Young Ave., Fayetteville, AR 72704, USA; (J.-R.J.); (Y.-J.W.)
| | - Anna Michałowska
- AGC Biologics, Vandtårnsvej 83B, 2860 Søborg, Copenhagen, Denmark;
| | - Robert Tylingo
- Department of Chemistry, Technology and Biotechnology of Food, Faculty of Chemistry, Gdansk University of Technology, 11/12 G. Narutowicza Street, 80-233 Gdansk, Poland;
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27
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Hebda E, Bukowczan A, Michałowski S, Wroński S, Urbaniak P, Kaczmarek M, Hutnik E, Romaniuk A, Wolun-Cholewa M, Pielichowski K. Examining the influence of functionalized POSS on the structure and bioactivity of flexible polyurethane foams. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 108:110370. [PMID: 31923950 DOI: 10.1016/j.msec.2019.110370] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 10/25/2019] [Accepted: 10/25/2019] [Indexed: 11/28/2022]
Abstract
This work reports for the first time on a new class of flexible polyurethane foam hybrids (PUFs) synthesized with the use of less toxic aliphatic hexamethylene diisocyanate (HDI), which have been chemically modified by POSS moieties. The flexible polyurethane foam hybrids (PUFs) chemically modified by functionalized polyhedral oligomeric silsesquioxanes: octa(3-hydroxy-3-methylbutyldimethylsiloxy)POSS (OCTA-POSS) and 1,2-propanediolizo-butylPOSS (PHI-POSS), was obtained. The resulting foams, which contain 0 to 15 wt % POSS, were characterized in terms of their structure, morphology, density and compressive strength. The FT-IR results indicate the chemical incorporation of both OCTAPOSS and PHIPOSS into the polyurethane matrix. SEM-EDS analysis showed that both OCTAPOSS and PHIPOSS nanoparticles are distributed homogeneously in the foam structure; at 15 wt % load PHIPOSS characteristic "crosses" are formed. With the increase of PHIPOSS content in the matrix, the formation of agglomerates is observed, as revealed by WAXD spectra. The introduction of POSS compounds reduces the porosity of the polyurethane, with the number of pores increasing as the amount of modifier increases. Mechanical tests - compressive strength - show that the hardness of modified materials (5 wt % POSS) increases compared to the reference material. An incubation was carried out in a simulated physiological fluid (SBF) to pre-assess the bioactivity of the materials obtained. The obtained results confirmed the formation of a hydroxyapatite layer on the PUF-POSS surface. Cytotoxicity, cell cycle and apoptosis of osteoblast cells and fibroblasts were assessed in the presence of the PUF-POSS materials. Test materials have a cytotoxic effect on both established cell lines. PUF-PHIPOSS samples showed better biocompatibility than reference and PUF-OCTAPOSS samples, as they caused lower mortality of the examined cells.
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Affiliation(s)
- Edyta Hebda
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, 24 Warszawska Street, 31-155, Kraków, Poland.
| | - Artur Bukowczan
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, 24 Warszawska Street, 31-155, Kraków, Poland
| | - Sławomir Michałowski
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, 24 Warszawska Street, 31-155, Kraków, Poland
| | - Sebastian Wroński
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. 30 Mickiewicza Street, 30-059, Krakow, Poland
| | - Paulina Urbaniak
- Department of Cell Biology, Poznan University of Medical Sciences, 5D Rokietnicka Street, 60-806, Poznan, Poland
| | - Mariusz Kaczmarek
- Department of Immunology, Chair of Pathomorphology and Clinical Immunology, Poznan University of Medical Sciences, 5D Rokietnicka Street, 60-806, Poznan, Poland
| | - Emilia Hutnik
- Department of Immunology, Chair of Pathomorphology and Clinical Immunology, Poznan University of Medical Sciences, 5D Rokietnicka Street, 60-806, Poznan, Poland
| | - Aleksandra Romaniuk
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego Street, 60-355, Poznan, Poland
| | - Maria Wolun-Cholewa
- Department of Cell Biology, Poznan University of Medical Sciences, 5D Rokietnicka Street, 60-806, Poznan, Poland
| | - Krzysztof Pielichowski
- Department of Chemistry and Technology of Polymers, Cracow University of Technology, 24 Warszawska Street, 31-155, Kraków, Poland
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Zhang J, Hori N, Takemura A. Optimization of preparation process to produce polyurethane foam made by oilseed rape straw based polyol. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.05.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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The effect of rapeseed oil-based polyols on the thermal and mechanical properties of ureaurethane elastomers. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02774-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mizera K, Ryszkowska J, Kurańska M, Prociak A. Production and characterization of ureaurethane elastomers with rapeseed-based polyol. POLYM INT 2018. [DOI: 10.1002/pi.5684] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kamila Mizera
- Faculty of Materials Science and Engineering; Warsaw University of Technology; Warsaw Poland
| | - Joanna Ryszkowska
- Faculty of Materials Science and Engineering; Warsaw University of Technology; Warsaw Poland
| | - Maria Kurańska
- Faculty of Chemical Engineering and Technology; Cracow University of Technology; Cracow Poland
| | - Aleksander Prociak
- Faculty of Chemical Engineering and Technology; Cracow University of Technology; Cracow Poland
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Gama NV, Ferreira A, Barros-Timmons A. Polyurethane Foams: Past, Present, and Future. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1841. [PMID: 30262722 PMCID: PMC6213201 DOI: 10.3390/ma11101841] [Citation(s) in RCA: 239] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 09/19/2018] [Accepted: 09/23/2018] [Indexed: 11/16/2022]
Abstract
Polymeric foams can be found virtually everywhere due to their advantageous properties compared with counterparts materials. Possibly the most important class of polymeric foams are polyurethane foams (PUFs), as their low density and thermal conductivity combined with their interesting mechanical properties make them excellent thermal and sound insulators, as well as structural and comfort materials. Despite the broad range of applications, the production of PUFs is still highly petroleum-dependent, so this industry must adapt to ever more strict regulations and rigorous consumers. In that sense, the well-established raw materials and process technologies can face a turning point in the near future, due to the need of using renewable raw materials and new process technologies, such as three-dimensional (3D) printing. In this work, the fundamental aspects of the production of PUFs are reviewed, the new challenges that the PUFs industry are expected to confront regarding process methodologies in the near future are outlined, and some alternatives are also presented. Then, the strategies for the improvement of PUFs sustainability, including recycling, and the enhancement of their properties are discussed.
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Affiliation(s)
- Nuno V Gama
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro⁻Campus Santiago, 3810-193 Aveiro, Portugal.
| | - Artur Ferreira
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro⁻Campus Santiago, 3810-193 Aveiro, Portugal.
- Escola Superior de Tecnologia e Gestão de Águeda-Rua Comandante Pinho e Freitas, No. 28, 3750-127 Águeda, Portugal.
| | - Ana Barros-Timmons
- CICECO-Aveiro Institute of Materials and Department of Chemistry, University of Aveiro⁻Campus Santiago, 3810-193 Aveiro, Portugal.
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Kosmela P, Zedler L, Formela K, Haponiuk J, Piszczyk L. Recent Developments in Polyurethane Foams Containing Low-Cost and Pro-Ecological Modifiers. CHEMISTRY & CHEMICAL TECHNOLOGY 2016. [DOI: 10.23939/chcht10.04si.571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Diversity of the polyurethane (PU) foams applications cause that investigation of the relationships between their structure and properties is currently very popular topic among the many research institutions and companies. At the turn of the last years many scientific papers about PU foams and their composites were published. The one of the main trends in research in this field is related to the reduction of production costs of PU foams. This aim can be successfully achieved through the incorporation of raw materials of natural origin or the utilization of waste materials. This work reviews the progress and recent developments in area of PU foams containing low-cost and pro-ecological modifiers, such as crude glycerol, liquefied biomass, ground tire rubber, etc.
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