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Chestnut burrs as a sustainable source of cellulose for Pickering emulsion stabilisers

2026Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosEngenharia e Tecnologia::Biotecnologia Industrial
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
datacite.subject.sdg04:Educação de Qualidade
dc.contributor.authorLains, Joana
dc.contributor.authorAlmeida, Heloísa H.S.
dc.contributor.authorBarreiro, Filomena
dc.contributor.authorSilva, Cláudia Gomes
dc.contributor.authorDias, Madalena M.
dc.contributor.authorSantos, Ricardo J.
dc.contributor.authorRibeiro, Andreia
dc.contributor.authorMartins, Isabel M.
dc.date.accessioned2026-02-18T10:51:11Z
dc.date.available2026-02-18T10:51:11Z
dc.date.issued2026
dc.description.abstractAs the global population grows, increasing food consumption drives a significant rise in agri-food waste. In the northern Tras-os-Montes region of Portugal, one of the world's largest chestnut producers, this waste includes valuable by-products such as chestnut burrs, which are composed of 63% cellulose. This study aims to valorise chestnut burrs by extracting compounds for incorporation into high-added-value products. Cellulose was extracted through physical and chemical pre-treatments, alkali hydrolysis and bleaching. The process parameters were adjusted to enhance the extracted cellulose content and purity. Extracts were characterised by thermogravimetry and Fourier Transform Infrared Spectroscopy, and parameters such as particle size, zeta potential and wettability were also assessed and compared with commercial microcrystalline cellulose. Temperature was identified as the key parameter in alkali hydrolysis, with optimal conditions obtained for 10% NaOH at 100 degrees C for 1 h and a biomass-to-solvent ratio of 1:20 g/mL. Bleaching under optimal conditions (2% NaClO at 35 degrees C) removed an additional 7% lignin and enhanced the whiteness of the final product. The cellulose obtained has a purity of 72%, with a particle size of 55 mu m, a negative surface charge, hydrophilic behaviour, an estimated molecular weight of 13.2 kDa, and a crystallinity of 56.5%. When applied at 0.8 wt% of the aqueous phase in 20:80 oil-in-water emulsions, these particles stabilise Pickering emulsions with a 12 mm average droplet size, remaining stable for at least 30 days. These findings demonstrate that chestnut burrs are a viable and sustainable source of cellulose with high potential as a natural Pickering emulsion stabiliser for use in food, cosmetics, and pharmaceuticals.eng
dc.description.sponsorshipThis work is financially supported by the Promove Programme through Fundação “La Caixa”, in collaboration with the BPI and Fundação para a Ciência e a Tecnologia (FCT), under the project CyChest - Gestão integrada do ciclo do castanheiro no Parque Natural de Montesinho. This work was also financially supported by Fundação para a Ciência e a Tecnologia, I.P. /MCTES through national funds: LSRE-LCM, UID/50020/2025; and ALiCE, LA/P/0045/2020 (DOI: 10.54499/LA/P/0045/2020); CIMO, UIDB/00690/2020 (DOI: 10.54499/UIDB/00690/2020) and UIDP/00690/2020 (DOI: 10.54499/UIDP/00690/2020) and LA SusTEC, LA/P/0007/2021 (DOI:10.54499/LA/P/0007/2020). Andreia Ribeiro acknowledges the FCT for their research contract through the individual CEEC – Stimulus of Scientific Employment (DOI: 10.54499/2022.00798.CEECIND/CP1733/CT0009).
dc.identifier.citationLains, Joana; Almeida, Heloísa; Barreiro, Maria F.; Silva, Claudia G.; Dias, Madalena M.; Santos, Ricardo J.; Ribeiro, Andreia; Martins, Isabel M. (2026). Chestnut burrs as a sustainable source of cellulose for Pickering emulsion stabilisers. International Journal of Biological Macromolecules. ISSN 0141-8130. 343, p. 1-14
dc.identifier.doi10.1016/j.ijbiomac.2026.150438
dc.identifier.issn0141-8130
dc.identifier.urihttp://hdl.handle.net/10198/35772
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
dc.relationALICE - Associate Laboratory in Chemical Engineering
dc.relationMountain Research Center
dc.relationAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
dc.relation.ispartofInternational Journal of Biological Macromolecules
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectChestnut burrs
dc.subjectCellulose
dc.subjectAlkali hydrolysis
dc.subjectBleaching treatment
dc.subjectPickering emulsion
dc.titleChestnut burrs as a sustainable source of cellulose for Pickering emulsion stabiliserseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUIDB/50020/2020
oaire.awardNumberLA/P/0045/2020
oaire.awardNumberUIDP/00690/2020
oaire.awardNumberLA/P/0007/2020
oaire.awardTitleLaboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials
oaire.awardTitleALICE - Associate Laboratory in Chemical Engineering
oaire.awardTitleMountain Research Center
oaire.awardTitleAssociate Laboratory for Sustainability and Tecnology in Mountain Regions
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50020%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0045%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F00690%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0007%2F2020/PT
oaire.citation.endPage14
oaire.citation.startPage1
oaire.citation.titleInternational Journal of Biological Macromolecules
oaire.citation.volume343
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameAlmeida
person.familyNameBarreiro
person.givenNameHeloísa H.S.
person.givenNameFilomena
person.identifier.ciencia-id8012-E230-D0DE
person.identifier.ciencia-id3418-47D5-5746
person.identifier.orcid0000-0003-0807-3522
person.identifier.orcid0000-0002-6844-333X
person.identifier.ridL-9802-2014
person.identifier.scopus-author-id57188719717
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
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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