{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T04:17:03Z","timestamp":1775276223945,"version":"3.50.1"},"reference-count":50,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2026,3,7]],"date-time":"2026-03-07T00:00:00Z","timestamp":1772841600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FCT\/MCTES","award":["CIMO UID\/00690\/2025"],"award-info":[{"award-number":["CIMO UID\/00690\/2025"]}]},{"name":"FCT\/MCTES","award":["UID\/PRR\/00690\/2025"],"award-info":[{"award-number":["UID\/PRR\/00690\/2025"]}]},{"name":"SusTEC","award":["LA\/P\/0007\/2020"],"award-info":[{"award-number":["LA\/P\/0007\/2020"]}]},{"name":"Foundation for Science and Technology","award":["2021.05215.BD"],"award-info":[{"award-number":["2021.05215.BD"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Lignin, 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\u2013quercetin 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\u2013quercetin particles (&lt;1 \u00b5m) 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 \u00b1 0.1\u00b0, and a zeta potential of \u221252.8 \u00b1 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\u2013quercetin hybrid colloidal particles as sustainable and functional Pickering stabilizers, opening new opportunities for advanced cosmetic and pharmaceutical formulations.<\/jats:p>","DOI":"10.3390\/molecules31050889","type":"journal-article","created":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T15:49:42Z","timestamp":1773071382000},"page":"889","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Lignin\u2013Quercetin Hybrid Colloidal Particles as Sustainable Pickering Emulsifiers: A Bio-Based and Functional Approach"],"prefix":"10.3390","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-6130-7959","authenticated-orcid":false,"given":"Barbara Miqueletti de","family":"Oliveira","sequence":"first","affiliation":[{"name":"CIMO, LA SusTEC, Instituto Polit\u00e9cnico de Bragan\u00e7a, Campus de Santa Apol\u00f3nia, 5300-253 Bragan\u00e7a, Portugal"},{"name":"Departamento de Engenharia Qu\u00edmica, Universidade Tecnol\u00f3gica Federal do Paran\u00e1 (UTFPR), Campus Londrina, Londrina 86036-370, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8715-5843","authenticated-orcid":false,"given":"Giovana","family":"Colucci","sequence":"additional","affiliation":[{"name":"CIMO, LA SusTEC, Instituto Polit\u00e9cnico de Bragan\u00e7a, Campus de Santa Apol\u00f3nia, 5300-253 Bragan\u00e7a, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8436-9216","authenticated-orcid":false,"given":"Tatiana B.","family":"Schreiner","sequence":"additional","affiliation":[{"name":"CIMO, LA SusTEC, Instituto Polit\u00e9cnico de Bragan\u00e7a, Campus de Santa Apol\u00f3nia, 5300-253 Bragan\u00e7a, Portugal"}]},{"given":"Gert","family":"Preegel","sequence":"additional","affiliation":[{"name":"Fibenol Biorefinary & Laboratories, 13522 Tallinn, Estonia"}]},{"given":"Lucimara Lopes da","family":"Silva","sequence":"additional","affiliation":[{"name":"Departamento de Engenharia Qu\u00edmica, Universidade Tecnol\u00f3gica Federal do Paran\u00e1 (UTFPR), Campus Londrina, Londrina 86036-370, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0107-7301","authenticated-orcid":false,"given":"Arantzazu","family":"Santamaria-Echart","sequence":"additional","affiliation":[{"name":"CIMO, LA SusTEC, Instituto Polit\u00e9cnico de Bragan\u00e7a, Campus de Santa Apol\u00f3nia, 5300-253 Bragan\u00e7a, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6844-333X","authenticated-orcid":false,"given":"Maria-Filomena","family":"Barreiro","sequence":"additional","affiliation":[{"name":"CIMO, LA SusTEC, Instituto Polit\u00e9cnico de Bragan\u00e7a, Campus de Santa Apol\u00f3nia, 5300-253 Bragan\u00e7a, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2026,3,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"302","DOI":"10.1016\/j.jconrel.2019.07.003","article-title":"Pickering Emulsions: Preparation Processes, Key Parameters Governing Their Properties and Potential for Pharmaceutical Applications","volume":"309","author":"Albert","year":"2019","journal-title":"J. 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