Publicação
Oxypropylation of lignins and characterization of the ensuing polyols
| Resumo: | Four lignin samples (Alcell, Indulin AT, Curan 27-11P and Sarkanda) were converted into liquid polyols by a chain extension reaction with propylene oxide (oxypropylation). The reaction was carried out in a batch reactor using potassium hydroxide (KOH) as a catalyst. The oxypropylation process was first optimized with Alcell lignin by modifying the lignin/propylene oxide ratio (L/PO, w/v) and catalyst content (C/(C+L), % w/w). L/PO ratios of 10/90, 20/80, 30/70 and 40/60, and catalyst contents from 2 to 5% were used. Based on the studied formulations, and considering the polyol requirements for polyurethane foam synthesis (a hydroxyl number (IOH) between 300 and 800 and a viscosity below 300 Pa.s), three formulations were chosen and applied for the oxypropylation the other lignin samples: 20/80/5, 30/70/2 and 35/65/2. The produced polyols were characterized. Their IOH and viscosity were found to be in the range of those typical of commercial polyols employed in polyurethane preparation. |
|---|---|
| Autores principais: | Cateto, Carolina |
| Outros Autores: | Barreiro, M.F.; Rodrigues, Alírio; Belgacem, Mohamed Naceur |
| Assunto: | Lignin Oxypropylation Biopolyols Characterization |
| Ano: | 2007 |
| País: | Portugal |
| Tipo de documento: | comunicação em conferência |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| _version_ | 1863851405949796352 |
|---|---|
| author | Cateto, Carolina |
| author2 | Barreiro, M.F. Rodrigues, Alírio Belgacem, Mohamed Naceur |
| author2_role | author author author |
| author_facet | Cateto, Carolina Barreiro, M.F. Rodrigues, Alírio Belgacem, Mohamed Naceur |
| author_role | author |
| contributor_name_str_mv | Biblioteca Digital do IPB |
| country_str | PT |
| creators_json_str | [{\"Person.name\":\"Cateto, Carolina\"},{\"Person.name\":\"Barreiro, M.F.\",\"Person.identifier.orcid\":\"0000-0002-6844-333X\"},{\"Person.name\":\"Rodrigues, Alírio\"},{\"Person.name\":\"Belgacem, Mohamed Naceur\"}] |
| datacite.contributors.contributor.contributorName.fl_str_mv | Biblioteca Digital do IPB |
| datacite.creators.creator.creatorName.fl_str_mv | Cateto, Carolina Barreiro, M.F. Rodrigues, Alírio Belgacem, Mohamed Naceur |
| datacite.date.Accepted.fl_str_mv | 2007-01-01T00:00:00Z |
| datacite.date.available.fl_str_mv | 2010-02-09T10:16:26Z |
| datacite.date.embargoed.fl_str_mv | 2010-02-09T10:16:26Z |
| datacite.rights.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| datacite.subjects.subject.fl_str_mv | Lignin Oxypropylation Biopolyols Characterization |
| datacite.titles.title.fl_str_mv | Oxypropylation of lignins and characterization of the ensuing polyols |
| dc.contributor.none.fl_str_mv | Biblioteca Digital do IPB |
| dc.creator.none.fl_str_mv | Cateto, Carolina Barreiro, M.F. Rodrigues, Alírio Belgacem, Mohamed Naceur |
| dc.date.Accepted.fl_str_mv | 2007-01-01T00:00:00Z |
| dc.date.available.fl_str_mv | 2010-02-09T10:16:26Z |
| dc.date.embargoed.fl_str_mv | 2010-02-09T10:16:26Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10198/1781 |
| dc.language.none.fl_str_mv | eng |
| dc.publisher.none.fl_str_mv | ILI - The International Lignin Institute |
| dc.rights.none.fl_str_mv | http://purl.org/coar/access_right/c_16ec |
| dc.subject.none.fl_str_mv | Lignin Oxypropylation Biopolyols Characterization |
| dc.title.fl_str_mv | Oxypropylation of lignins and characterization of the ensuing polyols |
| dc.type.none.fl_str_mv | http://purl.org/coar/resource_type/c_5794 |
| description | Four lignin samples (Alcell, Indulin AT, Curan 27-11P and Sarkanda) were converted into liquid polyols by a chain extension reaction with propylene oxide (oxypropylation). The reaction was carried out in a batch reactor using potassium hydroxide (KOH) as a catalyst. The oxypropylation process was first optimized with Alcell lignin by modifying the lignin/propylene oxide ratio (L/PO, w/v) and catalyst content (C/(C+L), % w/w). L/PO ratios of 10/90, 20/80, 30/70 and 40/60, and catalyst contents from 2 to 5% were used. Based on the studied formulations, and considering the polyol requirements for polyurethane foam synthesis (a hydroxyl number (IOH) between 300 and 800 and a viscosity below 300 Pa.s), three formulations were chosen and applied for the oxypropylation the other lignin samples: 20/80/5, 30/70/2 and 35/65/2. The produced polyols were characterized. Their IOH and viscosity were found to be in the range of those typical of commercial polyols employed in polyurethane preparation. |
| dirty | 0 |
| eu_rights_str_mv | restrictedAccess |
| format | conferencePaper |
| fulltext.url.fl_str_mv | https://bibliotecadigital.ipb.pt/bitstreams/ed09b457-e9ae-4d89-9f28-0db42d6247c4/download |
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| identifier.url.fl_str_mv | http://hdl.handle.net/10198/1781 |
| instacron_str | ipb |
| institution | Instituto Politécnico de Bragança |
| instname_str | Instituto Politécnico de Bragança |
| language | eng |
| network_acronym_str | ipb |
| network_name_str | Biblioteca Digital do IPB |
| oai_identifier_str | oai:bibliotecadigital.ipb.pt:10198/1781 |
| organization_str_mv | urn:organizationAcronym:ipb |
| person_str_mv | Cateto, Carolina Barreiro, M.F. Barreiro, M.F. https://www.ciencia-id.pt/3418-47D5-5746 3418-47D5-5746 http://orcid.org/0000-0002-6844-333X 0000-0002-6844-333X Rodrigues, Alírio Belgacem, Mohamed Naceur |
| publishDate | 2007 |
| publisher.none.fl_str_mv | ILI - The International Lignin Institute |
| reponame_str | Biblioteca Digital do IPB |
| repository_id_str | urn:repositoryAcronym:ipb |
| service_str_mv | urn:repositoryAcronym:ipb |
| spelling | engILI - The International Lignin InstituteptFour lignin samples (Alcell, Indulin AT, Curan 27-11P and Sarkanda) were converted into liquid polyols by a chain extension reaction with propylene oxide (oxypropylation). The reaction was carried out in a batch reactor using potassium hydroxide (KOH) as a catalyst. The oxypropylation process was first optimized with Alcell lignin by modifying the lignin/propylene oxide ratio (L/PO, w/v) and catalyst content (C/(C+L), % w/w). L/PO ratios of 10/90, 20/80, 30/70 and 40/60, and catalyst contents from 2 to 5% were used. Based on the studied formulations, and considering the polyol requirements for polyurethane foam synthesis (a hydroxyl number (IOH) between 300 and 800 and a viscosity below 300 Pa.s), three formulations were chosen and applied for the oxypropylation the other lignin samples: 20/80/5, 30/70/2 and 35/65/2. The produced polyols were characterized. Their IOH and viscosity were found to be in the range of those typical of commercial polyols employed in polyurethane preparation.application/pdfptOxypropylation of lignins and characterization of the ensuing polyolsCateto, CarolinaPersonalBarreiro, M.F.DSpacehttp://dspace.org/items/0391987c-ba90-488b-839a-153447ce1f0fDSpacehttp://dspace.org/items/0391987c-ba90-488b-839a-153447ce1f0fBarreiroFilomenaCiência IDhttps://www.ciencia-id.pt3418-47D5-5746ORCIDhttp://orcid.org0000-0002-6844-333XResearcher IDhttps://www.researcherid.comL-9802-2014Scopus Author IDhttps://www.scopus.com57188719717Rodrigues, AlírioBelgacem, Mohamed NaceurHostingInstitutionOrganizationalBiblioteca Digital do IPBe-mailmailto:dspace@ipb.ptdspace@ipb.pt2010-02-09T10:16:26Z20072007-01-01T00:00:00ZHandlehttp://hdl.handle.net/10198/1781http://purl.org/coar/access_right/c_16ecrestricted accessLigninOxypropylationBiopolyolsCharacterization3302730 bytesother research producthttp://purl.org/coar/resource_type/c_5794conference paperhttp://purl.org/coar/access_right/c_16ecapplication/pdffulltexthttps://bibliotecadigital.ipb.pt/bitstreams/ed09b457-e9ae-4d89-9f28-0db42d6247c4/download8th ILI Forum115118Rome, Italy |
| spellingShingle | Oxypropylation of lignins and characterization of the ensuing polyols Cateto, Carolina Lignin Oxypropylation Biopolyols Characterization |
| subject.fl_str_mv | Lignin Oxypropylation Biopolyols Characterization |
| title | Oxypropylation of lignins and characterization of the ensuing polyols |
| title_full | Oxypropylation of lignins and characterization of the ensuing polyols |
| title_fullStr | Oxypropylation of lignins and characterization of the ensuing polyols |
| title_full_unstemmed | Oxypropylation of lignins and characterization of the ensuing polyols |
| title_short | Oxypropylation of lignins and characterization of the ensuing polyols |
| title_sort | Oxypropylation of lignins and characterization of the ensuing polyols |
| topic | Lignin Oxypropylation Biopolyols Characterization |
| topic_facet | Lignin Oxypropylation Biopolyols Characterization |
| url | http://hdl.handle.net/10198/1781 |
| visible | 1 |