{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:37:23Z","timestamp":1760189843111,"version":"build-2065373602"},"reference-count":57,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2023,4,13]],"date-time":"2023-04-13T00:00:00Z","timestamp":1681344000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia I.P","doi-asserted-by":"publisher","award":["SFRH\/BD\/138665 2018","UIDB\/ 00081\/2020","LA\/P\/0056\/2020"],"award-info":[{"award-number":["SFRH\/BD\/138665 2018","UIDB\/ 00081\/2020","LA\/P\/0056\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"European Social Fund (ESF)","award":["SFRH\/BD\/138665 2018","UIDB\/ 00081\/2020","LA\/P\/0056\/2020"],"award-info":[{"award-number":["SFRH\/BD\/138665 2018","UIDB\/ 00081\/2020","LA\/P\/0056\/2020"]}]},{"name":"CIQUP","award":["SFRH\/BD\/138665 2018","UIDB\/ 00081\/2020","LA\/P\/0056\/2020"],"award-info":[{"award-number":["SFRH\/BD\/138665 2018","UIDB\/ 00081\/2020","LA\/P\/0056\/2020"]}]},{"DOI":"10.13039\/501100001871","name":"IMS","doi-asserted-by":"publisher","award":["SFRH\/BD\/138665 2018","UIDB\/ 00081\/2020","LA\/P\/0056\/2020"],"award-info":[{"award-number":["SFRH\/BD\/138665 2018","UIDB\/ 00081\/2020","LA\/P\/0056\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Interactions between polymers (P) and surfactants (S) in aqueous solution lead to interfacial and aggregation phenomena that are not only of great interest in physical chemistry but also important for many industrial applications, such as the development of detergents and fabric softeners. Here, we synthesized two ionic derivatives\u2014sodium carboxymethylcellulose (NaCMC) and quaternized cellulose (QC)\u2014from cellulose recycled from textile wastes and then explored the interactions of these polymers with assorted surfactants\u2014cationic (CTAB, gemini), anionic (SDS, SDBS) and nonionic (TX-100)\u2014commonly used in the textile industry. We obtained surface tension curves of the P\/S mixtures by fixing the polymer concentration and then increasing the surfactant concentration. In mixtures where polymer and surfactant are oppositely charged (P\u2212\/S+ and P+\/S\u2212), a strong association is observed, and from the surface tension curves, we determined the critical aggregation concentration (cac) and critical micelle concentration in the presence of polymer (cmcp). For mixtures of similar charge (P+\/S+ and P\u2212\/S\u2212), virtually no interactions are observed, with the notable exception of the QC\/CTAB system, which is much more surface active than the neat CTAB. We further investigated the effect of oppositely charged P\/S mixtures on hydrophilicity by measuring the contact angles of aqueous droplets on a hydrophobic textile substrate. Significantly, both P\u2212\/S+ and P+\/S\u2212 systems greatly enhance the hydrophilicity of the substrate at much lower surfactant concentrations than the surfactant alone (in particular in the QC\/SDBS and QC\/SDS systems).<\/jats:p>","DOI":"10.3390\/molecules28083454","type":"journal-article","created":{"date-parts":[[2023,4,14]],"date-time":"2023-04-14T02:03:38Z","timestamp":1681437818000},"page":"3454","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Interactions between Ionic Cellulose Derivatives Recycled from Textile Wastes and Surfactants: Interfacial, Aggregation and Wettability Studies"],"prefix":"10.3390","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7999-206X","authenticated-orcid":false,"given":"Catarina","family":"Costa","sequence":"first","affiliation":[{"name":"CIQUP, IMS (Institute for Molecular Sciences), Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre s\/n, 4169-007 Porto, Portugal"},{"name":"CeNTI\u2014Centre for Nanotechnology and Smart Materials, Rua Fernando Mesquita, 4760-034 Vila Nova de Famalic\u00e3o, Portugal"}]},{"given":"Andr\u00e9","family":"Viana","sequence":"additional","affiliation":[{"name":"CIQUP, IMS (Institute for Molecular Sciences), Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre s\/n, 4169-007 Porto, Portugal"},{"name":"CeNTI\u2014Centre for Nanotechnology and Smart Materials, Rua Fernando Mesquita, 4760-034 Vila Nova de Famalic\u00e3o, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0515-9470","authenticated-orcid":false,"given":"Isabel S.","family":"Oliveira","sequence":"additional","affiliation":[{"name":"CIQUP, IMS (Institute for Molecular Sciences), Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre s\/n, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3892-9216","authenticated-orcid":false,"given":"Eduardo F.","family":"Marques","sequence":"additional","affiliation":[{"name":"CIQUP, IMS (Institute for Molecular Sciences), Departamento de Qu\u00edmica e Bioqu\u00edmica, Faculdade de Ci\u00eancias, Universidade do Porto, Rua do Campo Alegre s\/n, 4169-007 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/0001-8686(92)80011-L","article-title":"Association and segregation in aqueous polymer\/polymer, polymer surfactant, and surfactant surfactant mixtures\u2014Similarities and differences","volume":"41","author":"Piculell","year":"1992","journal-title":"Adv. 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