{"id":1172,"date":"2026-09-30T11:18:39","date_gmt":"2026-09-30T14:18:39","guid":{"rendered":"https:\/\/wp.ufpel.edu.br\/bionano\/?page_id=1172"},"modified":"2026-09-30T11:18:39","modified_gmt":"2026-09-30T14:18:39","slug":"encapsulation-of-blackberry-anthocyanins-rubus-spp-in-hydroxypropylmethylcellulose-nanofibers-using-electrospinning-technology","status":"publish","type":"page","link":"https:\/\/wp.ufpel.edu.br\/bionano\/producao-cientifica\/2026-2\/encapsulation-of-blackberry-anthocyanins-rubus-spp-in-hydroxypropylmethylcellulose-nanofibers-using-electrospinning-technology\/","title":{"rendered":"Encapsulation of blackberry anthocyanins (Rubus spp.) in hydroxypropylmethylcellulose nanofibers using electrospinning technology"},"content":{"rendered":"<p>Renires dos Santos Teixeira, K\u00e1tia Gomes da Silva, Flavia Tayn\u00e1 Serra Silva, Igor Henrique de Lima Costa, Rondinele Nunes de Araujo, Rui Carlos Zambiazi, \u00c1lvaro Renato Guerra Dias, M\u00e1rcia Vizzotto, Cesar Valmor Rombaldi, Leonardo Nora<\/p>\n<h2 class=\"section-title u-h4 u-margin-l-top u-margin-xs-bottom\">Abstract<\/h2>\n<div id=\"abs0010\" class=\"abstract author\">\n<div id=\"sp0050\" class=\"u-margin-s-bottom\">Blackberry (<em>Rubus<\/em> spp., cv. BRS Caingu\u00e1) is a significant source of anthocyanins, especially cyanidin-3-glycoside, compounds recognized for their antioxidant activity, but with limited stability against environmental factors. This study aimed to incorporate blackberry anthocyanins into HPMC nanofibers obtained by electrospinning, with a view to obtaining a nanostructured material capable of preserving the bioactive fraction. Nanofibers were produced without extract (control) and with 5\u201320% (w\/w) extract incorporation. The samples were characterized in terms of morphology, thermogravimetric properties, functional groups, wettability, and antioxidant capacity. The nanofibers presented homogeneous morphology and average diameters between 101 and 191\u202fnm. FT-IR spectroscopy indicated intermolecular interactions between the hydroxyl groups of HPMC and anthocyanins, resulting in encapsulation efficiencies greater than 95% for concentrations up to 15%. TG\/DSC analyses showed that encapsulation increased the initial degradation temperature of the extract from 135 \u00b0C to 173\u2013175 \u00b0C (approximately 30%) and altered the thermal profile, indicating interactions with the HPMC matrix and improved thermal stability. The incorporation of the extract increased the hydrophilicity of the membranes, as reflected in the reduction of the contact angle, although antioxidant activity increased with extract concentration, nanofibers showed lower values than the free extract, suggesting reduced immediate bioactive compound availability due to encapsulation. PCA indicated that the formulation with 15% extract presented the best balance between structural stability and bioactivity. The results demonstrate that HPMC nanofibers incorporated with blackberry anthocyanins constitute a promising system for application as a functional ingredient.<\/div>\n<div><\/div>\n<\/div>\n<div><a href=\"https:\/\/doi.org\/10.1016\/j.foostr.2026.100538\">https:\/\/doi.org\/10.1016\/j.foostr.2026.100538<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Renires dos Santos Teixeira, K\u00e1tia Gomes da Silva, Flavia Tayn\u00e1 Serra Silva, Igor Henrique de Lima Costa, Rondinele Nunes de Araujo, Rui Carlos Zambiazi, \u00c1lvaro Renato Guerra Dias, M\u00e1rcia Vizzotto, Cesar Valmor Rombaldi, Leonardo Nora Abstract Blackberry (Rubus spp., cv. BRS Caingu\u00e1) is a significant source of anthocyanins, especially cyanidin-3-glycoside, compounds recognized for their antioxidant&#8230; <\/p>\n<div class=\"link-more\"><a href=\"https:\/\/wp.ufpel.edu.br\/bionano\/producao-cientifica\/2026-2\/encapsulation-of-blackberry-anthocyanins-rubus-spp-in-hydroxypropylmethylcellulose-nanofibers-using-electrospinning-technology\/\">Leia mais<\/a><\/div>\n","protected":false},"author":1158,"featured_media":0,"parent":1061,"menu_order":18,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1172","page","type-page","status-publish","hentry"],"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/pages\/1172","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/users\/1158"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/comments?post=1172"}],"version-history":[{"count":1,"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/pages\/1172\/revisions"}],"predecessor-version":[{"id":1173,"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/pages\/1172\/revisions\/1173"}],"up":[{"embeddable":true,"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/pages\/1061"}],"wp:attachment":[{"href":"https:\/\/wp.ufpel.edu.br\/bionano\/wp-json\/wp\/v2\/media?parent=1172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}