| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Instrumentação. |
|
Data corrente: |
20/09/2021 |
|
Data da última atualização: |
10/12/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
FACCHINATTO, W. M.; SANTOS, D. M. dos; BUKZEM, A. de L.; MORAES, T. B.; HABITZREUTER, F.; AZEVEDO, E. R. de; COLNAGO, L. A.; CAMPANA-FILHO, S. P. |
|
Afiliação: |
LUIZ ALBERTO COLNAGO, CNPDIA. |
|
Título: |
Insight into morphological, physicochemical and spectroscopic properties of B-chitin nanocrystalline structures. |
|
Ano de publicação: |
2021 |
|
Fonte/Imprenta: |
Carbohydrate Polymers, v. 273, 118563, 2021. |
|
Páginas: |
1 - 14 |
|
ISSN: |
0144-8617 |
|
DOI: |
https://doi.org/10.1016/j.carbpol.2021.118563 |
|
Idioma: |
Inglês |
|
Conteúdo: |
We systematically investigated the effect of β-chitin (BCH) particle size on the preparation of nanocrystals/ nanowhiskers (CWH) by acid hydrolysis. Regardless this variable, CWH aqueous suspension exhibited outstanding stability and the average degree of acetylation remained nearly constant after the acid treatment. In contrast, the morphology, dimensions, crystallinity, and molecular weight of CHW were significantly affect by the particle size. Although needle-like crystals have predominated, BCH particles sizes significantly affected the dimensions and asymmetry of CWH, as confirmed by the rheological and NMR relaxation (T2) behaviors. According to different SSNMR approaches, the acid hydrolysis meaningless affected the local chain conformation, while the spatial freedom of BCH intersheets, rated upon the mobility of methyl segments, was taken as evidence of higher permeability of acid into small particle sizes. Thus, this study demonstrated the importance of stan dardizing the surface/bulk proportions of β-chitin aiming to predict and control the CWH morphology and related properties. |
|
Palavras-Chave: |
Beta-Chitin Nanocrystals; Beta-Chitin Nanowhiskers; Particle surface/bulk proportions relationship; SSNMR spectroscopy. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02043naa a2200289 a 4500
001 2134840
005 2024-12-10
008 2021 bl uuuu u00u1 u #d
022 $a0144-8617
024 7 $ahttps://doi.org/10.1016/j.carbpol.2021.118563$2DOI
100 1 $aFACCHINATTO, W. M.
245 $aInsight into morphological, physicochemical and spectroscopic properties of B-chitin nanocrystalline structures.$h[electronic resource]
260 $c2021
300 $a1 - 14
520 $aWe systematically investigated the effect of β-chitin (BCH) particle size on the preparation of nanocrystals/ nanowhiskers (CWH) by acid hydrolysis. Regardless this variable, CWH aqueous suspension exhibited outstanding stability and the average degree of acetylation remained nearly constant after the acid treatment. In contrast, the morphology, dimensions, crystallinity, and molecular weight of CHW were significantly affect by the particle size. Although needle-like crystals have predominated, BCH particles sizes significantly affected the dimensions and asymmetry of CWH, as confirmed by the rheological and NMR relaxation (T2) behaviors. According to different SSNMR approaches, the acid hydrolysis meaningless affected the local chain conformation, while the spatial freedom of BCH intersheets, rated upon the mobility of methyl segments, was taken as evidence of higher permeability of acid into small particle sizes. Thus, this study demonstrated the importance of stan dardizing the surface/bulk proportions of β-chitin aiming to predict and control the CWH morphology and related properties.
653 $aBeta-Chitin Nanocrystals
653 $aBeta-Chitin Nanowhiskers
653 $aParticle surface/bulk proportions relationship
653 $aSSNMR spectroscopy
700 1 $aSANTOS, D. M. dos
700 1 $aBUKZEM, A. de L.
700 1 $aMORAES, T. B.
700 1 $aHABITZREUTER, F.
700 1 $aAZEVEDO, E. R. de
700 1 $aCOLNAGO, L. A.
700 1 $aCAMPANA-FILHO, S. P.
773 $tCarbohydrate Polymers$gv. 273, 118563, 2021.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Instrumentação (CNPDIA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 2 | |
| 1. |  | CERDEIRA, A. L.; SANTOS, N. A. G.; UETA, J.; SHUHAMA, I. K.; PESSOA, M. C. P. Y.; SMITH JUNIOR, S.; LANCHOTE, V. L. Atrazine in water and biodegradation in a recharge area of Guarany Aquifer in Brazil. Bulletin of Environmental Contamination and Toxicology, New York, v. 73, n. 1, p. 117-124, 2004.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Meio Ambiente. |
|    |
| 2. | | CERDEIRA, A. L.; SOUZA, M. D. de; BOLONHEZI, D.; QUEIROZ, S. C. do N. de; FERRACINI, V. L.; LIGO, M. A. V.; PESSOA, M. C. P. Y.; SMITH JUNIOR. S. Effects of sugar cane mechanical harvesting followed by no-tillage crop systems on leaching of triazine herbicides in Brazil. Bulletin of Environmental Contamination and Toxicology, New York, v. 75, n. 4, p. 805-812, 2005.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Meio Ambiente. |
| |
| Registros recuperados : 2 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
