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Exopolysaccharides from porphyridium cruentum as a reinforcing agent for chitosan biopolymer-based film

2025-06Journal article Open access
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dc.contributor.authorLazzarotto Cristofoli, Nathana
dc.contributor.authorRibeiro Lima, Alexandre
dc.contributor.authorCosta, Sebastião
dc.contributor.authorSilva, Carlos Manuel
dc.contributor.authorVarela, João
dc.contributor.authorVieira, Margarida
dc.date.accessioned2025-07-17T09:21:26Z
dc.date.available2025-07-17T09:21:26Z
dc.date.issued2025-06
dc.description.abstractMicroalgae exopolysaccharides (EPS), extracted from exhausted culture medium of Porphyridium cruentum, a rhodophyte able to grow in marine environments, may be useful as reinforcing agents in chitosan-based films produced by casting, using glycerol as a plasticizer. EPS were added at 1 and 2 % (w/v). The resulting hydrophilic films, EPS1 and EPS2, respectively, were opaquer than the control (CTR) chitosan-based films without EPS, resulting in increased thickness and solubility, and decreased moisture and water contact angle. EPS1 and EPS2 showed 1.5 and 2.0-fold higher tensile strength and a 2.9- and 16.3-fold higher Young’s modulus, respectively, compared to CTR. Conversely, elongation decreased by 1.9- and 8.2-fold for EPS1 and EPS2 compared to CTR. EPS1 and EPS2 showed a homogeneous matrix surface upon SEM analysis, presenting some aggregated particles with increasing EPS concentration. FTIR histograms were not influenced by the EPS concentration used. Thermal analysis showed film degradation occurred in three phases, with no significant enhancement in thermal stability. Soil biodegradability confirmed all films degraded within 35 days. This study demonstrated the feasibility of using industrial microalgae byproducts, such as EPS, as film reinforcement agents, primarily enhancing mechanical strength, thus increasing the possibilities of using these raw materials to produce sustainable food films.eng
dc.identifier.doi10.1016/j.ijbiomac.2025.144310
dc.identifier.issn0141-8130
dc.identifier.urihttp://hdl.handle.net/10400.1/27429
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationDevelopment of intelligent packaging based on raw materials obtained from the rhodophyte Porphyridium cruentum
dc.relationDevelopment of a sustainable package from Salicornia ramosissima by-product for high pressure process
dc.relationMediterranean Institute for Agriculture, Environment and Development
dc.relationAlgarve Centre for Marine Sciences
dc.relationAlgarve Centre for Marine Sciences
dc.relationCentre for Marine and Environmental Research
dc.relationCICECO-Aveiro Institute of Materials
dc.relationCICECO-Aveiro Institute of Materials
dc.relationCICECO – Aveiro Institute of Materials
dc.relation.ispartofInternational Journal of Biological Macromolecules
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectPolysaccharides
dc.subjectComposite materials
dc.subjectBio-based films
dc.titleExopolysaccharides from porphyridium cruentum as a reinforcing agent for chitosan biopolymer-based filmeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleDevelopment of intelligent packaging based on raw materials obtained from the rhodophyte Porphyridium cruentum
oaire.awardTitleDevelopment of a sustainable package from Salicornia ramosissima by-product for high pressure process
oaire.awardTitleMediterranean Institute for Agriculture, Environment and Development
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardTitleCICECO-Aveiro Institute of Materials
oaire.awardTitleCICECO-Aveiro Institute of Materials
oaire.awardTitleCICECO – Aveiro Institute of Materials
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F149395%2F2019/PT
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oaire.citation.startPage144310
oaire.citation.titleInternational Journal of Biological Macromolecules
oaire.citation.volume314
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person.familyNameLazzarotto Cristofoli
person.familyNameRibeiro Lima
person.familyNameVarela
person.familyNameVieira
person.givenNameNathana
person.givenNameAlexandre
person.givenNameJoão
person.givenNameMargarida
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person.identifier.orcid0000-0003-2774-706X
person.identifier.ridM-4223-2013
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person.identifier.scopus-author-id57211780814
person.identifier.scopus-author-id55741416000
person.identifier.scopus-author-id7202140775
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