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Title: | Association of antioxidant monophenolic compounds with β-cyclodextrin-functionalized cellulose and starch substrates | Authors: | Aguado, Roberto Murtinho, Dina Valente, Artur J. M. |
Keywords: | Carbohydrate chemistry; Cellulose; Crosslinking; Phenolics; Release kinetics; Starch; β-Cyclodextrin | Issue Date: | 1-Sep-2021 | Publisher: | Elsevier | Project: | Project inpactus – innovative products and technologies from eucalyptus, Project N.º 21874/Portugal 2020 through European Regional Development Fund (ERDF) in the frame of COMPETE 2020 n◦246/AXIS II/2017 | Serial title, monograph or event: | Carbohydrate Polymers | Volume: | 267 | Abstract: | Polysaccharide substrates loaded with antioxidant and antimicrobial compounds, effectively protected by cyclodextrin moieties, can be a long-lasting solution to confer certain properties to fabrics, paper and other materials. β-Cyclodextrin was attached to α-cellulose, bleached pulp and starch by a two-step esterification with a tetracarboxylic acid. The resulting derivatives were characterized by spectroscopy, thermal degradation analysis and capability of phenolphthalein inclusion. The carriers, containing between 89 and 171 μmol of β-cyclodextrin per gram, were loaded with carvacrol, cuminaldehyde, cinnamaldehyde and hydroxytyrosol. From a stoichiometric addition, the percentage of compound retained ranged from 49% (hydroxytyrosol in pulp-cyclodextrin) to 92% (carvacrol in starch-cyclodextrin). Finally, the release rate to aqueous ethanol was measured over eight days and fitted to kinetic models. From the analysis of the mean dissolution time, it can be concluded that inserting β-cyclodextrin units enhanced the long-term holding of phenolic active compounds in carbohydrate matrices. | URI: | https://hdl.handle.net/10316/107448 | ISSN: | 01448617 | DOI: | 10.1016/j.carbpol.2021.118189 | Rights: | embargoedAccess |
Appears in Collections: | I&D CQC - Artigos em Revistas Internacionais |
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