Repository logo
 
Publication

Chemical Modification of Pachira aquatica Oil for Bio-Based Polyurethane Wood Adhesives

2025-12-10Research article Open access
Simple item page
dc.contributor.authorSilva, Emilly
dc.contributor.authorEsteves, Bruno
dc.contributor.authorDomingos, idalina
dc.contributor.authorAlmeida, Margarida Lopes de
dc.contributor.authorAraújo, Bruno
dc.contributor.authorChaves, Izabella
dc.contributor.authorFassarella, Michelângelo
dc.contributor.authoret al.
dc.date.accessioned2025-12-15T10:21:09Z
dc.date.available2025-12-15T10:21:09Z
dc.date.issued2025-12-10en_US
dc.date.updated2025-12-12T16:32:27Z
dc.description.abstractThe development of biomass-based adhesives has attracted interest as an alternative to petroleum-derived synthetic and potentially toxic adhesives. Pachira aquatica oil is a renewable raw material that can be incorporated into an MDI-based polyurethane system. In this study, the chemical composition and reactivity of P. aquatica oil were characterized using GC–MS, FTIR, and hydroxyl index measurements. The oil showed a predominance of saturated fatty acids, particularly methyl hexadecanoate (64.80%), derived from palmitic acid, and exhibited a low initial hydroxyl value. To enhance reactivity, the oil was transesterified with glycerol under different conditions, producing polyols with substantially increased hydroxyl values (412–769 mg KOH g−1 ), as confirmed by the intensified O–H and C–O bands in the FTIR spectra. The polyurethane adhesives were formulated from the selected polyols (P3 and P4) and evaluated at different NCO/OH ratios and pressing temperatures, using ABES shear tests. The highest ABES shear strength recorded was approximately 3.6 MPa, obtained for isocyanate indices between 0.8 and 1.0 and temperatures around 115 ◦C. Although this value represents the best performance among the tested conditions, it remains below the industrial benchmarks typically associated with the EN 205 standard (≈10 MPa). It is important to note that the ABES and EN 205 methods are not directly comparable due to differences in testing protocols. Nevertheless, the results indicate that, under the evaluated conditions, the adhesives exhibit limited mechanical performance and require further optimization.eng
dc.description.versionN/A
dc.identifier.citationSilva, E.; Esteves, B.; Domingos, I.; Almeida, M.; Araújo, B.; Chaves, I.; Fassarella, M.; Lelis, R.; Paes, J.; Carvalho, L.; et al. Chemical Modification of Pachira aquatica Oil for Bio-Based Polyurethane Wood Adhesives. Forests 2025, 16, 1843. https://doi.org/10.3390/f16121843
dc.identifier.doi10.3390/f16121843en_US
dc.identifier.issn1999-4907en_US
dc.identifier.slugcv-prod-4623159
dc.identifier.urihttp://hdl.handle.net/10400.19/9585
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectbio-based adhesive
dc.subjectvegetable oil polyols
dc.subjectneotropical species
dc.subjecttransesterification
dc.subjectwood adhesion
dc.titleChemical Modification of Pachira aquatica Oil for Bio-Based Polyurethane Wood Adhesivesen_US
dc.typeresearch articleen_US
dspace.entity.typePublication
oaire.citation.issue12en_US
oaire.citation.startPage1843
oaire.citation.titleForestsen_US
oaire.citation.volume16en_US
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameEsteves
person.familyNameDomingos
person.familyNameAlmeida
person.givenNameBruno
person.givenNameidalina
person.givenNameMargarida Lopes de
person.identifier2119255
person.identifier.ciencia-id521B-63A7-B248
person.identifier.ciencia-id7116-E1DE-88E7
person.identifier.orcid0000-0001-6660-3128
person.identifier.orcid0000-0002-4308-1563
person.identifier.orcid0000-0002-3745-9304
person.identifier.ridC-2173-2012
person.identifier.scopus-author-id57202554441
person.identifier.scopus-author-id24281086400
rcaap.cv.cienciaid521B-63A7-B248 | Bruno Miguel Morais Lemos Esteves
rcaap.rightsopenAccessen_US
relation.isAuthorOfPublicationa3351493-41e8-4758-acae-39e3382d0b04
relation.isAuthorOfPublication50134ab7-55eb-4e8a-a5ea-5cc54b1468e3
relation.isAuthorOfPublication5c0ed1f6-2f04-48ac-b52d-e7cb9e6b26c2
relation.isAuthorOfPublication.latestForDiscoverya3351493-41e8-4758-acae-39e3382d0b04

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
forests-16-01843-v2.pdf
Size:
1.59 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.82 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ESTGV - DEM - Artigo em revista científica, indexada ao WoS/Scopus