Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation
Two polyol raw materials were obtained in the conducted research, one based on metasilicic acid (MSA), the other based on poly(lactic acid) (PLA) waste. The obtained polyols were characterized in terms of their applicability for the production of rigid polyurethane foams (RPUFs). Their basic analyti...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/22/1/69 |
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| author | Joanna Paciorek-Sadowska Marcin Borowicz Ewelina Chmiel Jacek Lubczak |
| author_facet | Joanna Paciorek-Sadowska Marcin Borowicz Ewelina Chmiel Jacek Lubczak |
| author_sort | Joanna Paciorek-Sadowska |
| collection | DOAJ |
| description | Two polyol raw materials were obtained in the conducted research, one based on metasilicic acid (MSA), the other based on poly(lactic acid) (PLA) waste. The obtained polyols were characterized in terms of their applicability for the production of rigid polyurethane foams (RPUFs). Their basic analytical properties (hydroxyl number, acid number, elemental analysis) and physicochemical properties (density, viscosity) were determined. The assumed chemical structure of the obtained new compounds was confirmed by performing FTIR and <sup>1</sup>H NMR spectroscopic tests. Formulations for the synthesis of RPUFs were developed on the basis of the obtained research results. A mixture of polyols based on MSA and PLA in a weight ratio of 1:1 was used as the polyol component in the polyurethane formulation. The reference foam in these tests was a foam that was synthesized only on the basis of MSA-polyol. The obtained RPUFs were tested for basic functional properties (apparent density, compressive strength, water absorption, thermal conductivity coefficient etc.). Susceptibility to biodegradation in soil environment was also tested. It was found that the use of mixture of polyols based on MSA and PLA positively affected the properties of the obtained foam. The polyurethane foam based on this polyol mixture showed good thermal resistance and significantly reduced flammability in comparison with the foam based MSA-polyol. Moreover, it showed higher compressive strength, lower thermal conductivity and biodegradability in soil. The results of the conducted tests confirmed that the new foam was characterized by very good performance properties. In addition, this research provides information on new waste management opportunities and fits into the doctrine of sustainable resource management offered by the circular economy. |
| first_indexed | 2024-03-10T13:49:46Z |
| format | Article |
| id | doaj.art-c667b83d090843cfb33b6c3ad1f22884 |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T13:49:46Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-c667b83d090843cfb33b6c3ad1f228842023-11-21T02:16:00ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672020-12-012216910.3390/ijms22010069Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to BiodegradationJoanna Paciorek-Sadowska0Marcin Borowicz1Ewelina Chmiel2Jacek Lubczak3Department of Polyurethane Chemistry and Technology, Institute of Materials Engineering, Kazimierz Wielki University, Chodkiewicza 30 St, 85-064 Bydgoszcz, PolandDepartment of Polyurethane Chemistry and Technology, Institute of Materials Engineering, Kazimierz Wielki University, Chodkiewicza 30 St, 85-064 Bydgoszcz, PolandDepartment of Organic Chemistry, Rzeszów University of Technology, Al. Powstańców Warszawy 6, 35-959 Rzeszów, PolandDepartment of Organic Chemistry, Rzeszów University of Technology, Al. Powstańców Warszawy 6, 35-959 Rzeszów, PolandTwo polyol raw materials were obtained in the conducted research, one based on metasilicic acid (MSA), the other based on poly(lactic acid) (PLA) waste. The obtained polyols were characterized in terms of their applicability for the production of rigid polyurethane foams (RPUFs). Their basic analytical properties (hydroxyl number, acid number, elemental analysis) and physicochemical properties (density, viscosity) were determined. The assumed chemical structure of the obtained new compounds was confirmed by performing FTIR and <sup>1</sup>H NMR spectroscopic tests. Formulations for the synthesis of RPUFs were developed on the basis of the obtained research results. A mixture of polyols based on MSA and PLA in a weight ratio of 1:1 was used as the polyol component in the polyurethane formulation. The reference foam in these tests was a foam that was synthesized only on the basis of MSA-polyol. The obtained RPUFs were tested for basic functional properties (apparent density, compressive strength, water absorption, thermal conductivity coefficient etc.). Susceptibility to biodegradation in soil environment was also tested. It was found that the use of mixture of polyols based on MSA and PLA positively affected the properties of the obtained foam. The polyurethane foam based on this polyol mixture showed good thermal resistance and significantly reduced flammability in comparison with the foam based MSA-polyol. Moreover, it showed higher compressive strength, lower thermal conductivity and biodegradability in soil. The results of the conducted tests confirmed that the new foam was characterized by very good performance properties. In addition, this research provides information on new waste management opportunities and fits into the doctrine of sustainable resource management offered by the circular economy.https://www.mdpi.com/1422-0067/22/1/69polyurethane foamproperties of foamsynthesis of polyolsmetasilicic acidPLA |
| spellingShingle | Joanna Paciorek-Sadowska Marcin Borowicz Ewelina Chmiel Jacek Lubczak Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation International Journal of Molecular Sciences polyurethane foam properties of foam synthesis of polyols metasilicic acid PLA |
| title | Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation |
| title_full | Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation |
| title_fullStr | Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation |
| title_full_unstemmed | Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation |
| title_short | Use of a Mixture of Polyols Based on Metasilicic Acid and Recycled PLA for Synthesis of Rigid Polyurethane Foams Susceptible to Biodegradation |
| title_sort | use of a mixture of polyols based on metasilicic acid and recycled pla for synthesis of rigid polyurethane foams susceptible to biodegradation |
| topic | polyurethane foam properties of foam synthesis of polyols metasilicic acid PLA |
| url | https://www.mdpi.com/1422-0067/22/1/69 |
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