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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
08/05/2018 |
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Data da última atualização: |
07/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MATTOS, B. D.; TARDY, B. L.; PEZHMAN, M.; KÄMÄRÄINEN, T.; LINDER, M.; SCHREINER, W. H.; MAGALHAES, W. L. E.; ROJAS, O. J. |
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Afiliação: |
Bruno D. Mattos, Doutorando da UFPR / Aalto University; Blaise L. Tardy, Aalto University; Mohammadi Pezhman, Aalto University; Tero Kämäräinen, Aalto University; Markus Linder, Aalto University; Wido H. Schreiner, UFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Orlando J. Rojas, Aalto University. |
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Título: |
Controlled biocide release from hierarchically-structured biogenic silica: surface chemistry to tune release rate and responsiveness. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Scientific Reports, v. 8, Article 5555, Apr. 2018. 11 p. |
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DOI: |
10.1038/s41598-018-23921-2 |
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Idioma: |
Inglês |
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Conteúdo: |
Biocides are essential for crop protection, packaging and several other biosystem applications. Therein, properties such as tailored and controlled release are paramount in the development of sustainable biocide delivery systems. We explore the self-similar nano-organized architecture of biogenic silica particles to achieve high biocide payload. The high surface area accessibility of the carrier allowed us to develop an efcient, low energy loading strategy, reaching signifcant dynamic loadings of up to 100mg·g?1. The release rate and responsiveness were tuned by manipulating the interfaces, using either the native hydroxyl surfaces of the carrier or systems modifed with amines or carboxylic acids in high density. We thoroughly evaluated the impact of the carrier-biocide interactions on the release rate as a function of pH, ionic strength and temperature. The amine and carboxyl functionalization strategy led to three-fold decrease in the release rate, while higher responsiveness against important agro-industrial variables. Key to our discoveries, nanostructuring thymol in the biogenic silica endowed systems with controlled, responsive release promoting remarkable, high and localized biocidal activity. The interfacial factors afecting related delivery were elucidated for an increased and localized biocidal activity, bringing a new light for the development of controlled release systems from porous materials. |
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Palavras-Chave: |
Atividade biológica; Biocida natural; Biocide delivery system; Biogenic silica; Biological activity; Chemical surface modification; Fractal supra structure; Funcionalização de nanopartículas; Functionalization of nanoparticles; Liberação lenta; Material nanoporoso; Mesoporous silica; Modificação química de superfície; Nanobiocida; Nanobiocides; Nanoporous material; Nanotecnologia; Natural biocide; Sílica biogênica; Sílica mesoporosa; Sistema de liberação de biocida; Slow release; Supraestrutura fractal; Timol. |
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Thesaurus Nal: |
Biocides; Nanotechnology; Thymol. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/176514/1/2018-Washington-SR-Controlled.pdf
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Marc: |
LEADER 03100naa a2200541 a 4500
001 2091250
005 2019-11-07
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1038/s41598-018-23921-2$2DOI
100 1 $aMATTOS, B. D.
245 $aControlled biocide release from hierarchically-structured biogenic silica$bsurface chemistry to tune release rate and responsiveness.$h[electronic resource]
260 $c2018
520 $aBiocides are essential for crop protection, packaging and several other biosystem applications. Therein, properties such as tailored and controlled release are paramount in the development of sustainable biocide delivery systems. We explore the self-similar nano-organized architecture of biogenic silica particles to achieve high biocide payload. The high surface area accessibility of the carrier allowed us to develop an efcient, low energy loading strategy, reaching signifcant dynamic loadings of up to 100mg·g?1. The release rate and responsiveness were tuned by manipulating the interfaces, using either the native hydroxyl surfaces of the carrier or systems modifed with amines or carboxylic acids in high density. We thoroughly evaluated the impact of the carrier-biocide interactions on the release rate as a function of pH, ionic strength and temperature. The amine and carboxyl functionalization strategy led to three-fold decrease in the release rate, while higher responsiveness against important agro-industrial variables. Key to our discoveries, nanostructuring thymol in the biogenic silica endowed systems with controlled, responsive release promoting remarkable, high and localized biocidal activity. The interfacial factors afecting related delivery were elucidated for an increased and localized biocidal activity, bringing a new light for the development of controlled release systems from porous materials.
650 $aBiocides
650 $aNanotechnology
650 $aThymol
653 $aAtividade biológica
653 $aBiocida natural
653 $aBiocide delivery system
653 $aBiogenic silica
653 $aBiological activity
653 $aChemical surface modification
653 $aFractal supra structure
653 $aFuncionalização de nanopartículas
653 $aFunctionalization of nanoparticles
653 $aLiberação lenta
653 $aMaterial nanoporoso
653 $aMesoporous silica
653 $aModificação química de superfície
653 $aNanobiocida
653 $aNanobiocides
653 $aNanoporous material
653 $aNanotecnologia
653 $aNatural biocide
653 $aSílica biogênica
653 $aSílica mesoporosa
653 $aSistema de liberação de biocida
653 $aSlow release
653 $aSupraestrutura fractal
653 $aTimol
700 1 $aTARDY, B. L.
700 1 $aPEZHMAN, M.
700 1 $aKÄMÄRÄINEN, T.
700 1 $aLINDER, M.
700 1 $aSCHREINER, W. H.
700 1 $aMAGALHAES, W. L. E.
700 1 $aROJAS, O. J.
773 $tScientific Reports$gv. 8, Article 5555, Apr. 2018. 11 p.
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