Suberinic Acids as a Potential Feedstock for Polyol Synthesis: Separation and Characterization
Global sustainability challenges prompt the world to modify its strategies and shift from a fossil-fuel-based economy to a bio-resources-based one and to the production of renewable biomass chemicals. Depolymerized suberinic acids (SA) were considered as an alternative resource to develop bio-polyol...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/24/4380 |
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| author | Janis Rizikovs Daniela Godina Raimonds Makars Aigars Paze Arnis Abolins Anda Fridrihsone Kristine Meile Mikelis Kirpluks |
| author_facet | Janis Rizikovs Daniela Godina Raimonds Makars Aigars Paze Arnis Abolins Anda Fridrihsone Kristine Meile Mikelis Kirpluks |
| author_sort | Janis Rizikovs |
| collection | DOAJ |
| description | Global sustainability challenges prompt the world to modify its strategies and shift from a fossil-fuel-based economy to a bio-resources-based one and to the production of renewable biomass chemicals. Depolymerized suberinic acids (SA) were considered as an alternative resource to develop bio-polyols that can be further used in polyurethane (PU) material production. Birch (<i>Betula pendula</i>) outer bark was used as a raw material to obtain the SA, extracted with ethanol, and depolymerized with potassium hydroxide ethanol solution. By acidifying the filtrate to pH 5.0, 3.0, and 1.0 and drying it at 50 °C and 130 °C, 12 different SA potential feedstocks were obtained and characterized using chemical (total phenolics content, solubility in DMSO, acid, hydroxyl, and saponification number) and instrumental analytical methods (GC-MS, SEC-RID, DSC, and FTIR). Several bio-polyols were synthesized from the SA sample acidified to pH 1 and dried at 130 °C. Acid number and hydroxyl number values, the apparent viscosity and moisture content were measured. It was concluded that SA have a high enough saponification and acid value to investigate the polyol synthesis route via the esterification reaction. Moreover, SA had OH groups in their structure, which can be exploited for PU material development. The majority of SA compounds had relatively low molecular weight with <1300 Da that are suited for bio-polyol synthesis applied for rigid PU foam development. The synthesized bio-polyols had high hydroxyl number values necessary for bio-polyols to be used for rigid PU foam production. |
| first_indexed | 2024-03-10T03:15:16Z |
| format | Article |
| id | doaj.art-224af35cf1a3419db34fa9f72e0c6806 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T03:15:16Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-224af35cf1a3419db34fa9f72e0c68062023-11-23T10:15:32ZengMDPI AGPolymers2073-43602021-12-011324438010.3390/polym13244380Suberinic Acids as a Potential Feedstock for Polyol Synthesis: Separation and CharacterizationJanis Rizikovs0Daniela Godina1Raimonds Makars2Aigars Paze3Arnis Abolins4Anda Fridrihsone5Kristine Meile6Mikelis Kirpluks7Latvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, LatviaLatvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, LatviaLatvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, LatviaLatvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, LatviaLatvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, LatviaLatvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, LatviaLatvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, LatviaLatvian State Institute of Wood Chemistry, Dzerbenes 27, LV-1006 Riga, LatviaGlobal sustainability challenges prompt the world to modify its strategies and shift from a fossil-fuel-based economy to a bio-resources-based one and to the production of renewable biomass chemicals. Depolymerized suberinic acids (SA) were considered as an alternative resource to develop bio-polyols that can be further used in polyurethane (PU) material production. Birch (<i>Betula pendula</i>) outer bark was used as a raw material to obtain the SA, extracted with ethanol, and depolymerized with potassium hydroxide ethanol solution. By acidifying the filtrate to pH 5.0, 3.0, and 1.0 and drying it at 50 °C and 130 °C, 12 different SA potential feedstocks were obtained and characterized using chemical (total phenolics content, solubility in DMSO, acid, hydroxyl, and saponification number) and instrumental analytical methods (GC-MS, SEC-RID, DSC, and FTIR). Several bio-polyols were synthesized from the SA sample acidified to pH 1 and dried at 130 °C. Acid number and hydroxyl number values, the apparent viscosity and moisture content were measured. It was concluded that SA have a high enough saponification and acid value to investigate the polyol synthesis route via the esterification reaction. Moreover, SA had OH groups in their structure, which can be exploited for PU material development. The majority of SA compounds had relatively low molecular weight with <1300 Da that are suited for bio-polyol synthesis applied for rigid PU foam development. The synthesized bio-polyols had high hydroxyl number values necessary for bio-polyols to be used for rigid PU foam production.https://www.mdpi.com/2073-4360/13/24/4380birch outer barksuberinic acidshigh functionality polyolspolyurethane materials |
| spellingShingle | Janis Rizikovs Daniela Godina Raimonds Makars Aigars Paze Arnis Abolins Anda Fridrihsone Kristine Meile Mikelis Kirpluks Suberinic Acids as a Potential Feedstock for Polyol Synthesis: Separation and Characterization Polymers birch outer bark suberinic acids high functionality polyols polyurethane materials |
| title | Suberinic Acids as a Potential Feedstock for Polyol Synthesis: Separation and Characterization |
| title_full | Suberinic Acids as a Potential Feedstock for Polyol Synthesis: Separation and Characterization |
| title_fullStr | Suberinic Acids as a Potential Feedstock for Polyol Synthesis: Separation and Characterization |
| title_full_unstemmed | Suberinic Acids as a Potential Feedstock for Polyol Synthesis: Separation and Characterization |
| title_short | Suberinic Acids as a Potential Feedstock for Polyol Synthesis: Separation and Characterization |
| title_sort | suberinic acids as a potential feedstock for polyol synthesis separation and characterization |
| topic | birch outer bark suberinic acids high functionality polyols polyurethane materials |
| url | https://www.mdpi.com/2073-4360/13/24/4380 |
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