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Lignin–Quercetin Hybrid Colloidal Particles as Sustainable Pickering Emulsifiers: A Bio-Based and Functional Approach

2026Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosCiências Naturais::Outras Ciências Naturais
datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
datacite.subject.sdg12:Produção e Consumo Sustentáveis
datacite.subject.sdg04:Educação de Qualidade
dc.contributor.authorOliveira, Barbara Miqueletti de
dc.contributor.authorColucci, Giovana
dc.contributor.authorSchreiner, Tatiana B.
dc.contributor.authorPreegel, Gert
dc.contributor.authorSilva, Lucimara Lopes da
dc.contributor.authorSantamaria-Echart, Arantzazu
dc.contributor.authorBarreiro, Filomena
dc.date.accessioned2026-03-30T10:13:30Z
dc.date.available2026-03-30T10:13:30Z
dc.date.issued2026
dc.description.abstractLignin, the second-most-abundant polymer on Earth, has attracted attention for its value-added applications. Colloidal lignin particles can overcome handling and compatibility issues, offer antioxidant, antimicrobial, and UV-protective properties, and serve as Pickering stabilizers. Plant extracts rich in bioactive compounds, such as polyphenols and flavonoids (e.g., quercetin), can further enhance lignin-based formulations. In this context, colloidal lignin–quercetin particles (CLQPs) were produced for the first time via antisolvent precipitation and used as Pickering emulsion stabilizers. CLQP dispersions (30 g/L) were prepared by solubilizing lignin and quercetin in 80% (v/v) aqueous acetone solution, followed by precipitation with a pH 8 buffer. A quercetin content of 50% (w/w) (CLQP-50) resulted in predominantly round-shaped lignin–quercetin particles (<1 µm) with a small fraction of quercetin crystals. Both structures contributed to emulsion stabilization, as evidenced by confocal microscopy, a three-phase contact angle of 91.6 ± 0.1°, and a zeta potential of −52.8 ± 2.7 mV. CLQP-50 successfully stabilized Pickering emulsions at a 60/40 oil/water ratio, showing high physical stability (stability index 0.01) and shear-thinning behavior with gel-like consistency. These findings demonstrate the pioneering development of lignin–quercetin hybrid colloidal particles as sustainable and functional Pickering stabilizers, opening new opportunities for advanced cosmetic and pharmaceutical formulations.eng
dc.description.sponsorshipThis work was supported by national funds through FCT/MCTES (PIDDAC): CIMO UID/00690/2025 (10.54499/UID/00690/2025) and UID/PRR/00690/2025 (10.54499/UID/PRR/00690/2025); and SusTEC, LA/P/0007/2020 (DOI: 10.54499/LA/P/0007/2020). The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for the Ph.D. research grant of G. Colucci (2021.05215.BD) and the institutional scientific employment program contract of A. Santamaria-Echart.
dc.identifier.citationOliveira, Barbara Miqueletti de; Colucci, Giovana; Schreiner, Tatiana B.; Preegel, Gert; Silva, Lucimara Lopes da; Santamaria-Echart, Arantzazu; Barreiro, Maria-Filomena (2026). Lignin–Quercetin Hybrid Colloidal Particles as Sustainable Pickering Emulsifiers: A Bio-Based and Functional Approach. Molecules. ISSN 1420-3049. 31:5, 1-18
dc.identifier.doi10.3390/molecules31050889
dc.identifier.issn1420-3049
dc.identifier.urihttp://hdl.handle.net/10198/36379
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationMountain Research Center
dc.relationAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
dc.relationCIMO - Mountain Research Center
dc.relationLignin-based Pickering Stabilizers for Innovative Cosmetic Applications
dc.relation.ispartofMolecules
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectLignin
dc.subjectColloidal lignin particles
dc.subjectQuercetin
dc.subjectPickering emulsions
dc.titleLignin–Quercetin Hybrid Colloidal Particles as Sustainable Pickering Emulsifiers: A Bio-Based and Functional Approacheng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUID/00690/2025
oaire.awardNumberLA/P/0007/2020
oaire.awardNumber2021.05215.BD
oaire.awardTitleMountain Research Center
oaire.awardTitleAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
oaire.awardTitleCIMO - Mountain Research Center
oaire.awardTitleLignin-based Pickering Stabilizers for Innovative Cosmetic Applications
oaire.awardURIhttp://hdl.handle.net/10198/35759
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0007%2F2020/PT
oaire.awardURIhttp://hdl.handle.net/10198/36356
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//2021.05215.BD/PT
oaire.citation.endPage18
oaire.citation.issue5
oaire.citation.startPage1
oaire.citation.titleMolecules
oaire.citation.volume31
oaire.fundingStreamCIMO
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamprojetos financiados com o apoio do Programa Operacional Regional do Norte (POR Norte/Norte 2020).
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameColucci
person.familyNameSchreiner
person.familyNameSantamaria-Echart
person.familyNameBarreiro
person.givenNameGiovana
person.givenNameTatiana B.
person.givenNameArantzazu
person.givenNameFilomena
person.identifier.ciencia-id7C17-EC19-5F05
person.identifier.ciencia-idBA13-066A-678F
person.identifier.ciencia-id0C17-1E1F-2621
person.identifier.ciencia-id3418-47D5-5746
person.identifier.orcid0000-0002-8715-5843
person.identifier.orcid0000-0001-8436-9216
person.identifier.orcid0000-0003-0107-7301
person.identifier.orcid0000-0002-6844-333X
person.identifier.ridL-9802-2014
person.identifier.scopus-author-id56725697700
person.identifier.scopus-author-id57188719717
project.funder.identifierhttp://doi.org/10.13039/501100001871
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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