{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T01:06:54Z","timestamp":1760058414097,"version":"build-2065373602"},"reference-count":62,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2025,3,31]],"date-time":"2025-03-31T00:00:00Z","timestamp":1743379200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FCT\/MCTES","award":["UIDP\/05608\/2020","UIDB\/05608\/2020","4654\/2024"],"award-info":[{"award-number":["UIDP\/05608\/2020","UIDB\/05608\/2020","4654\/2024"]}]},{"name":"Polytechnic University of Coimbra","award":["UIDP\/05608\/2020","UIDB\/05608\/2020","4654\/2024"],"award-info":[{"award-number":["UIDP\/05608\/2020","UIDB\/05608\/2020","4654\/2024"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>This research investigates the production of galactomannan from Adenanthera pavonina L. in its crude form and its subsequent crosslinking with glutaraldehyde under various pH conditions. The study involved the creation of films and sponges from these materials, followed by a comprehensive analysis of their structural, thermal, swelling, and electrical properties. Galactomannan was crosslinked with a fixed concentration of 0.2 mol\/L of glutaraldehyde, with pH levels ranging from 3 to 7. These films and sponges were prepared through a slow solvent evaporation process. The research encompassed multiple analytical techniques, including Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetry, swelling profile assessments, and impedance spectroscopy. The findings from structural analysis indicated that variations in pH did not alter the amorphous nature of the samples but did influence the interactions between galactomannan molecules and restricted the mobility of polymeric chains, which resulted in different dielectric responses. Crosslinked samples exhibited reduced water solubility compared to unprocessed galactomannan. Crosslinking also decreases the ability of the material to polarize and align in response to the electric field, which justifies why crosslinked samples present a lower dielectric constant than the crude sample.<\/jats:p>","DOI":"10.3390\/polym17070954","type":"journal-article","created":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T16:26:31Z","timestamp":1743611191000},"page":"954","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Dielectric Response of Crosslinked Adenanthera pavonina L. Galactomannan in pH-Controlled Medium"],"prefix":"10.3390","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6151-0053","authenticated-orcid":false,"given":"Ant\u00f4nia Millena de Oliveira","family":"Lima","sequence":"first","affiliation":[{"name":"Laborat\u00f3rio de Pesquisa, Instituto Federal do Maranh\u00e3o, Campus Imperatriz, Imperatriz 65906-335, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5205-8939","authenticated-orcid":false,"given":"Fernando","family":"Mendes","sequence":"additional","affiliation":[{"name":"Polytechnic University of Coimbra, Rua da Miseric\u00f3rdia, Lagar dos Corti\u00e7os, S. Martinho do Bispo, 3045-093 Coimbra, Portugal"},{"name":"H&TRC\u2014Health & Technology Research Center, Coimbra Health School, Polytechnic University of Coimbra, Rua 5 de Outubro, 3045-043, Coimbra, Portugal"},{"name":"Biophysics Institute of Faculty of Medicine, Coimbra Institute for Clinical and Biomedical Research (iCBR) Area of Environment Genetics and Oncobiology (CIMAGO), University of Coimbra, 3000-548 Coimbra, Portugal"},{"name":"Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3004-504 Coimbra, Portugal"},{"name":"European Association of Biomedical Scientists, B-1000 Brussels, Belgium"}]},{"given":"Lincoln Almeida","family":"Cavalcante","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio de Pesquisa, Instituto Federal do Maranh\u00e3o, Campus Imperatriz, Imperatriz 65906-335, Brazil"}]},{"given":"Cristiane Carvalho","family":"Ara\u00fajo","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio de Pesquisa, Instituto Federal do Maranh\u00e3o, Campus Imperatriz, Imperatriz 65906-335, Brazil"}]},{"given":"Beatriz da Silva","family":"Batista","sequence":"additional","affiliation":[{"name":"Unidade Avan\u00e7ada, Centro de Ci\u00eancias Sociais, Sa\u00fade e Tecnol\u00f3gica, Universidade Federal do Maranh\u00e3o, Imperatriz 65900-410, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5484-9080","authenticated-orcid":false,"given":"Jo\u00e3o Pedro Lemos","family":"Morais","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio de Pesquisa, Instituto Federal do Maranh\u00e3o, Campus Imperatriz, Imperatriz 65906-335, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1697-290X","authenticated-orcid":false,"given":"Filipe Miguel Borges","family":"Amaral","sequence":"additional","affiliation":[{"name":"Polytechnic University of Coimbra, Rua da Miseric\u00f3rdia, Lagar dos Corti\u00e7os, S. Martinho do Bispo, 3045-093 Coimbra, Portugal"},{"name":"H&TRC\u2014Health & Technology Research Center, Coimbra Health School, Polytechnic University of Coimbra, Rua 5 de Outubro, 3045-043, Coimbra, Portugal"},{"name":"I3N and Physics Department, Aveiro University, 3810-193 Aveiro, Portugal"}]},{"given":"Ana Ang\u00e9lica Mathias","family":"Mac\u00eado","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio de Pesquisa, Instituto Federal do Maranh\u00e3o, Campus Imperatriz, Imperatriz 65906-335, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"512","DOI":"10.1016\/j.foodhyd.2013.07.015","article-title":"Characterisation of partially hydrolysed galactomannan from Caesalpinia pulcherrima seeds as a potential dietary fibre","volume":"35","author":"Buriti","year":"2014","journal-title":"Food Hydrocoll."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"443","DOI":"10.1080\/10408398.2020.1819196","article-title":"A comprehensive review on leguminous galactomannans: Structural analysis, functional properties, biosynthesis process and industrial applications","volume":"62","author":"Sharma","year":"2021","journal-title":"Crit. 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