{"id":1655,"date":"2025-06-30T12:00:36","date_gmt":"2025-06-30T15:00:36","guid":{"rendered":"https:\/\/inctnanoagro.com.br\/?p=1655"},"modified":"2025-10-23T12:03:18","modified_gmt":"2025-10-23T15:03:18","slug":"uma-abordagem-dupla-com-lignina-e-nanolignina-reforcando-a-estabilidade-aos-raios-uv-e-a-sustentabilidade-em-matrizes-de-pva","status":"publish","type":"post","link":"https:\/\/inctnanoagro.com.br\/en\/uma-abordagem-dupla-com-lignina-e-nanolignina-reforcando-a-estabilidade-aos-raios-uv-e-a-sustentabilidade-em-matrizes-de-pva\/","title":{"rendered":"A dual approach with lignin and nanolignin: Reinforcing UV stability and sustainability in PVA matrices"},"content":{"rendered":"<h2><span style=\"font-weight: 400;\">A dual approach with lignin and nanolignin: Reinforcing UV stability and sustainability in PVA matrices<\/span><\/h2>\n<p>&nbsp;<\/p>\n<p><b><i>International Journal of Biological Macromolecules<\/i><\/b><\/p>\n<p><i><span style=\"font-weight: 400;\">Volume 314, June 2025<\/span><\/i><\/p>\n<p><a href=\"https:\/\/doi.org\/10.1016\/j.ijbiomac.2025.144386\"><span style=\"font-weight: 400;\">https:\/\/doi.org\/10.1016\/j.ijbiomac.2025.144386<\/span><\/a><span style=\"font-weight: 400;\">\u00a0<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">Amanda S.M. de Freitas<\/span><\/li>\n<li><span style=\"font-weight: 400;\">J\u00e9ssica S. Rodrigues\u00a0<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Lucas V.B. Fr\u00e9\u00a0<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Henrique O.S. Vieira\u00a0<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Maria E.S. Nascimento<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Stefanny F. Amaro<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Livia S. Emidio<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Daniele R. de Araujo\u00a0<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Anderson F. Sepulveda<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Daniel Komatsu<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Vagner R. Botaro<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Leonardo F. Fraceto<\/span><\/li>\n<li><span style=\"font-weight: 400;\">Marystela Ferreira<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-large wp-image-1656\" src=\"https:\/\/inctnanoagro.com.br\/wp-content\/uploads\/2025\/10\/A-dual-approach-with-lignin-and-nanolignin-Reinforcing-UV-stability-and-sustainability-in-PVA-matrices--1024x666.webp\" alt=\"\" width=\"800\" height=\"520\" srcset=\"https:\/\/inctnanoagro.com.br\/wp-content\/uploads\/2025\/10\/A-dual-approach-with-lignin-and-nanolignin-Reinforcing-UV-stability-and-sustainability-in-PVA-matrices--1024x666.webp 1024w, https:\/\/inctnanoagro.com.br\/wp-content\/uploads\/2025\/10\/A-dual-approach-with-lignin-and-nanolignin-Reinforcing-UV-stability-and-sustainability-in-PVA-matrices--300x195.webp 300w, https:\/\/inctnanoagro.com.br\/wp-content\/uploads\/2025\/10\/A-dual-approach-with-lignin-and-nanolignin-Reinforcing-UV-stability-and-sustainability-in-PVA-matrices--768x500.webp 768w, https:\/\/inctnanoagro.com.br\/wp-content\/uploads\/2025\/10\/A-dual-approach-with-lignin-and-nanolignin-Reinforcing-UV-stability-and-sustainability-in-PVA-matrices--18x12.webp 18w, https:\/\/inctnanoagro.com.br\/wp-content\/uploads\/2025\/10\/A-dual-approach-with-lignin-and-nanolignin-Reinforcing-UV-stability-and-sustainability-in-PVA-matrices-.webp 1362w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>&nbsp;<\/p>\n<h3><span style=\"font-weight: 400;\">Abstract:<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">A lignina Kraft (KL) e seus derivados fracionados por \u00e1cido ac\u00e9tico foram avaliados quanto \u00e0s suas propriedades antioxidantes e de absor\u00e7\u00e3o de radia\u00e7\u00e3o ultravioleta C (UV-C), com o objetivo de mitigar a degrada\u00e7\u00e3o foto-oxidativa do \u00e1lcool polivin\u00edlico (PVA). Filmes de PVA foram preparados com 4% (m\/m) de macropart\u00edculas de KL \u2014 incluindo a KL n\u00e3o fracionada e as fra\u00e7\u00f5es KL30, KL40 e KL50 \u2014 e com 0,4% (m\/m) de nanopart\u00edculas de lignina (NP), derivadas das mesmas fra\u00e7\u00f5es (denominadas NPKL, NP30, NP40 e NP50).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Todas as formula\u00e7\u00f5es, incluindo o controle (PVA puro), foram misturadas com 10% (m\/m) de fertilizante NPK (nitrog\u00eanio-f\u00f3sforo-pot\u00e1ssio, 10\u201310\u201310) e plastificadas com glicerol para a produ\u00e7\u00e3o de filmes. Ap\u00f3s 21 dias de exposi\u00e7\u00e3o \u00e0 radia\u00e7\u00e3o UV-C, os filmes contendo LNP mantiveram mais de 90% de transpar\u00eancia, em compara\u00e7\u00e3o com aproximadamente 70% de transpar\u00eancia do PVA puro.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">As an\u00e1lises por espectroscopia no infravermelho com transformada de Fourier (FTIR) e calorimetria diferencial de varredura (DSC) confirmaram redu\u00e7\u00e3o da degrada\u00e7\u00e3o foto-oxidativa e t\u00e9rmica nos filmes contendo lignina, especialmente aqueles com KL30 e NP30. Ensaios de biodegrada\u00e7\u00e3o utilizando an\u00e1lise respirom\u00e9trica de CO\u2082 mostraram libera\u00e7\u00e3o acelerada para NP30 (at\u00e9 90 mg ap\u00f3s 20 dias), refletindo maior atividade microbiana. Ensaios de lixivia\u00e7\u00e3o demonstraram libera\u00e7\u00e3o controlada de \u00edons NPK ao longo de 40 dias em filmes com NP.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Nos testes de aplica\u00e7\u00e3o, como filme de cobertura (mulch film) com tomate cereja, o PVA + NP30 apresentou desenvolvimento de mudas compar\u00e1vel ao filme comercial e superior ao dos filmes-controle. Esses resultados confirmam o potencial das nanopart\u00edculas de lignina como aditivos sustent\u00e1veis e multifuncionais para a estabiliza\u00e7\u00e3o UV e a libera\u00e7\u00e3o controlada de nutrientes em filmes agr\u00edcolas biodegrad\u00e1veis.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3><span style=\"font-weight: 400;\">Abstract:<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Kraft lignin (KL) and its acetic acid-fractionated derivatives were evaluated for their antioxidant and ultraviolet C (UV-C)-absorbing properties to mitigate the photooxidative degradation of polyvinyl alcohol (PVA). PVA films were prepared with 4 % (w\/w) KL macroparticles &#8211; including unfractionated KL and the fractionated forms KL30, KL40, and KL50 &#8211; and with 0.4 % (w\/w) lignin nanoparticles (NP), derived from the same fractions (named NPKL, NP30, NP40, and NP50). All formulations, including the control (pure PVA), were blended with 10 % (w\/w) NPK fertilizer (nitrogen\u2011phosphorus\u2011potassium, 10\u201310-10) and plasticized with glycerol for film casting. After 21 days of UV-C exposure, films containing LNP retained over 90 % transparency, compared to ~70 % for pure PVA. Fourier-transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) confirmed reduced photooxidative and thermal degradation in lignin-containing films, especially those with KL30 and NP30. Biodegradation assays using respirometric CO\u2082 analysis showed accelerated release for NP30 (up to 90 mg after 20 days), reflecting enhanced microbial activity. Leaching assays demonstrated controlled release of NPK ions over 40 days in films with NP. In mulch film application tests with cherry tomato, PVA + NP30 showed seedling development comparable to commercial mulch and superior to control films. These results confirm the potential of NP as sustainable, multifunctional additives for UV stabilization and controlled nutrient delivery in biodegradable agricultural films.<\/span><\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>A dual approach with lignin and nanolignin: Reinforcing UV stability and sustainability in PVA matrices &nbsp; International Journal of Biological Macromolecules Volume 314, June 2025 https:\/\/doi.org\/10.1016\/j.ijbiomac.2025.144386\u00a0 Amanda S.M. de Freitas J\u00e9ssica S. Rodrigues\u00a0 Lucas V.B. Fr\u00e9\u00a0 Henrique O.S. Vieira\u00a0 Maria E.S. Nascimento Stefanny F. Amaro Livia S. Emidio Daniele R. de Araujo\u00a0 Anderson F. Sepulveda [&hellip;]<\/p>","protected":false},"author":4,"featured_media":1656,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-1655","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publicacoes"],"_links":{"self":[{"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/posts\/1655","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/comments?post=1655"}],"version-history":[{"count":1,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/posts\/1655\/revisions"}],"predecessor-version":[{"id":1657,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/posts\/1655\/revisions\/1657"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/media\/1656"}],"wp:attachment":[{"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/media?parent=1655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/categories?post=1655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inctnanoagro.com.br\/en\/wp-json\/wp\/v2\/tags?post=1655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}