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Biblioteca(s): |
Embrapa Agroenergia. |
Data corrente: |
09/04/2021 |
Data da última atualização: |
09/04/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
TELES, V. C.; ROLDI, M.; LUZ, S. M.; SANTOS, W. R. dos; ANDREANI, L.; VALADARES, L. F. |
Afiliação: |
VALÉRYA CARNEIRO TELES; MARIANA ROLDI, Universidade de Brasília; SANDRA MARIA LUZ, Universidade de Brasília; WELLINGTON RANGEL DOS SANTOS, CNPAE; LARISSA ANDREANI CARVALHO, CNPAE; LEONARDO FONSECA VALADARES, CNPAE. |
Título: |
Obtaining plasticized starch and microfibrillated cellulose from oil palm empty fruit bunches: preparation and properties of the pure materials and their composites. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
BioResources, v. 16, n. 2, p. 3746-3759, 2021. |
Páginas: |
p. 3746-3759 |
DOI: |
DOI: 10.15376/biores.16.2.3746-3759 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Starch and celluloses are biodegradable resources of great importance in terms of marketing. These biopolymers can be used to generate films with interesting mechanical, optical, and thermal properties, which can substitute for plastic films in certain applications, e.g., packaging materials. This study describes the preparation of pure plasticized starch films, prepared from soluble starch and glycerol, and the preparation of microfibrillated cellulose films from oil palm empty fruit bunches fabricated via casting. Composites made of plasticized starch were also prepared with microfibrillated cellulose added in 10% increments. The density, color difference, opacity, morphology, water activity, water affinity, and thermal and mechanical characteristics of the films were investigated. Plasticized starch is a translucent material with contact transparency; it is fragile and has relatively high water and glycerol contents. The thermogravimetric analysis of materials displayed up to four stages of weight loss related to water evaporation, glycerol, starch, and cellulose thermal degradation. As a consequence, the materials with higher cellulose content exhibited better thermal resistance. The composites with 90% of microfibrillated cellulose resulted in increased tensile strength when compared to the pure materials. The pure microfibrillated cellulose presented the highest values of Young modulus. The addition of plasticized starch to microfibrillated cellulose improved the maximum strain of the composites. MenosAbstract: Starch and celluloses are biodegradable resources of great importance in terms of marketing. These biopolymers can be used to generate films with interesting mechanical, optical, and thermal properties, which can substitute for plastic films in certain applications, e.g., packaging materials. This study describes the preparation of pure plasticized starch films, prepared from soluble starch and glycerol, and the preparation of microfibrillated cellulose films from oil palm empty fruit bunches fabricated via casting. Composites made of plasticized starch were also prepared with microfibrillated cellulose added in 10% increments. The density, color difference, opacity, morphology, water activity, water affinity, and thermal and mechanical characteristics of the films were investigated. Plasticized starch is a translucent material with contact transparency; it is fragile and has relatively high water and glycerol contents. The thermogravimetric analysis of materials displayed up to four stages of weight loss related to water evaporation, glycerol, starch, and cellulose thermal degradation. As a consequence, the materials with higher cellulose content exhibited better thermal resistance. The composites with 90% of microfibrillated cellulose resulted in increased tensile strength when compared to the pure materials. The pure microfibrillated cellulose presented the highest values of Young modulus. The addition of plasticized starch to microfibrillated cellulose improved... Mostrar Tudo |
Palavras-Chave: |
Microfibrillated cellulose; Oil palm empty fruit bunches; Plasticized starch films. |
Thesagro: |
Amido; Biofilme; Celulose. |
Thesaurus Nal: |
Cellulose; Mechanical properties; Oil palm products; Starch; Thermal properties. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/222442/1/Obtaining-plasticized-starch-and.pdf
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Marc: |
LEADER 02586naa a2200337 a 4500 001 2131171 005 2021-04-09 008 2021 bl uuuu u00u1 u #d 024 7 $aDOI: 10.15376/biores.16.2.3746-3759$2DOI 100 1 $aTELES, V. C. 245 $aObtaining plasticized starch and microfibrillated cellulose from oil palm empty fruit bunches$bpreparation and properties of the pure materials and their composites.$h[electronic resource] 260 $c2021 300 $ap. 3746-3759 520 $aAbstract: Starch and celluloses are biodegradable resources of great importance in terms of marketing. These biopolymers can be used to generate films with interesting mechanical, optical, and thermal properties, which can substitute for plastic films in certain applications, e.g., packaging materials. This study describes the preparation of pure plasticized starch films, prepared from soluble starch and glycerol, and the preparation of microfibrillated cellulose films from oil palm empty fruit bunches fabricated via casting. Composites made of plasticized starch were also prepared with microfibrillated cellulose added in 10% increments. The density, color difference, opacity, morphology, water activity, water affinity, and thermal and mechanical characteristics of the films were investigated. Plasticized starch is a translucent material with contact transparency; it is fragile and has relatively high water and glycerol contents. The thermogravimetric analysis of materials displayed up to four stages of weight loss related to water evaporation, glycerol, starch, and cellulose thermal degradation. As a consequence, the materials with higher cellulose content exhibited better thermal resistance. The composites with 90% of microfibrillated cellulose resulted in increased tensile strength when compared to the pure materials. The pure microfibrillated cellulose presented the highest values of Young modulus. The addition of plasticized starch to microfibrillated cellulose improved the maximum strain of the composites. 650 $aCellulose 650 $aMechanical properties 650 $aOil palm products 650 $aStarch 650 $aThermal properties 650 $aAmido 650 $aBiofilme 650 $aCelulose 653 $aMicrofibrillated cellulose 653 $aOil palm empty fruit bunches 653 $aPlasticized starch films 700 1 $aROLDI, M. 700 1 $aLUZ, S. M. 700 1 $aSANTOS, W. R. dos 700 1 $aANDREANI, L. 700 1 $aVALADARES, L. F. 773 $tBioResources$gv. 16, n. 2, p. 3746-3759, 2021.
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Embrapa Agroenergia (CNPAE) |
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Biblioteca(s): |
Embrapa Acre. |
Data corrente: |
14/12/2022 |
Data da última atualização: |
14/12/2022 |
Tipo da produção científica: |
Artigo de Divulgação na Mídia |
Autoria: |
VALENTIM, J. F.; AMARAL, E. F. do; REIS, J. C. dos. |
Afiliação: |
JUDSON FERREIRA VALENTIM, CPAF-AC; EUFRAN FERREIRA DO AMARAL, CPAF-AC; JULIO CESAR DOS REIS, CPAC. |
Título: |
Investimentos na saúde dos solos para conciliar produtividade e sustentabilidade na agropecuária brasileira. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
O Rio Branco, 14 dez. 2022. |
Páginas: |
2 p. |
Idioma: |
Português |
Notas: |
Publicado também no Jornal Cocamar, 6 dez. 2022. |
Conteúdo: |
Este artigo aborda os principais problemas enfrentados para investimentos em recuperação da saúde do solo em áreas degradadas nos diferentes biomas brasileiros. |
Thesagro: |
Agricultura Sustentável; Degradação Ambiental; Manejo do Solo; Políticas Públicas. |
Thesaurus NAL: |
Public policy; Soil degradation; Soil management; Sustainable agriculture. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1149681/1/27401.pdf
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Marc: |
LEADER 00970nam a2200253 a 4500 001 2149681 005 2022-12-14 008 2022 bl uuuu u00u1 u #d 100 1 $aVALENTIM, J. F. 245 $aInvestimentos na saúde dos solos para conciliar produtividade e sustentabilidade na agropecuária brasileira.$h[electronic resource] 260 $aO Rio Branco, 14 dez. 2022.$c2022 300 $a2 p. 500 $aPublicado também no Jornal Cocamar, 6 dez. 2022. 520 $aEste artigo aborda os principais problemas enfrentados para investimentos em recuperação da saúde do solo em áreas degradadas nos diferentes biomas brasileiros. 650 $aPublic policy 650 $aSoil degradation 650 $aSoil management 650 $aSustainable agriculture 650 $aAgricultura Sustentável 650 $aDegradação Ambiental 650 $aManejo do Solo 650 $aPolíticas Públicas 700 1 $aAMARAL, E. F. do 700 1 $aREIS, J. C. dos
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