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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
30/11/2022 |
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Data da última atualização: |
22/01/2024 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SILVA, M. J.; BONDANCIA, T. J.; AGUIAR, J. de; GONÇALVES, E. C. P.; FARINAS, C. S.; MARTINS, M. A.; MATTOSO, L. H. C. |
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Afiliação: |
CRISTIANE SANCHEZ FARINAS, CNPDIA; MARIA ALICE MARTINS, CNPDIA; LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA. |
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Título: |
Cellulose nanomaterials from rubberwood obtained via enzymatic hydrolysis route. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE QUÍMICA, 45., 2022, Maceió. Química para o Desenvolvimento Sustentável e Soberano. Livro de resumos. Maceió, AL: Aptor Software, 2022. |
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Idioma: |
Inglês |
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Conteúdo: |
Novel strategy for the production of advanced materials from the waste generated in natural rubber exploration can improve the whole production chain(PARASHAR and CHAWLA, 2021). Lignocellulosic biomass from rubberwood has the potential for several applications, being formed by cellulose, hemicellulose, lignin, and inorganic compounds in smaller amounts. In this context, this work shows the characterization of nanomaterials obtained via enzymatic hydrolysis from bleached fibers of rubber tree. The fibers were mercerized with 5% (w/w) aqueous sodium hydroxide solution for 2h at 80 °C. Afterwards, the fibers were bleached with a solution composed of equal parts (v/v) of acetate buffer (27% by weight NaOH and 7.5% (v/v) glacial acetic acid, in distilled water) and aqueous sodium chlorite (1.7% by weight NaClO2 in water). Then, the fibers were bleached twice with a solution of equal parts (v/v) of 4% NaOH (w/w) and 24% H2O2 (v/v). The bleached fiber was submitted to enzymatic hydrolysis in sodium citrate buffer (0.1 M, pH 5), with a solids load of 15% (w/v) and an enzymatic load (Cellic Ctec 3 Novozymes®) of 10 mg / g of biomass in a shaker incubator at 50 °C. and 200 rpm for 48h. The characterizations were made by AFM measurements (Dimension V microscope - Veeco); X-ray diffraction (XRD) using a Shimadzu 6000 diffractometer with CuK ( = 1,54 Å), at room temperature and with 2 angle between 5 and 40° (1° min-1); thermogravimetric analysis (TGA) in an inert atmosphere, using TA Instruments equipment, model Q500 with a heating rate of 10 °C/min from room temperature to 600 °C. The X-ray diffractograms showed that the main peaks corresponding to the crystallographic planes of Type I cellulose. The Bragg angles (2) were: 16.0°, 22.4° and 34.6°, with the highest intensity in the crystallographic plane (002). The crystallinity index, calculated according to the method proposed by Segal (1959), was 57.8% for in natura fiber, 75.1% for bleached fiber and 80.8% after hydrolysis. Analyzing the thermograms, it was observed that the Tonset of the fiber in natura was 289 °C, that of the bleached fiber was 292 °C and after the hydrolysis it was 327 °C. There was a change in the maximum degradation peak, in the final temperature of the process and in the amount of residue after the treatment. The AFM images exhibited structures rod-like shapes, with mean length of 349.9±169.6 nm and the diameter of 4.0±1.7 nm, after 48h to enzymatic hydrolysis. Our results showed that the obtained nanomaterials can be effectively extracted from the studied lignocellulosic source using the enzymatic route. The nanostructures showed high crystallinity, excellent thermal stability and high aspect ratio. Thus, nanomaterials presented important characteristics for the use in several applications, including as reinforcement. MenosNovel strategy for the production of advanced materials from the waste generated in natural rubber exploration can improve the whole production chain(PARASHAR and CHAWLA, 2021). Lignocellulosic biomass from rubberwood has the potential for several applications, being formed by cellulose, hemicellulose, lignin, and inorganic compounds in smaller amounts. In this context, this work shows the characterization of nanomaterials obtained via enzymatic hydrolysis from bleached fibers of rubber tree. The fibers were mercerized with 5% (w/w) aqueous sodium hydroxide solution for 2h at 80 °C. Afterwards, the fibers were bleached with a solution composed of equal parts (v/v) of acetate buffer (27% by weight NaOH and 7.5% (v/v) glacial acetic acid, in distilled water) and aqueous sodium chlorite (1.7% by weight NaClO2 in water). Then, the fibers were bleached twice with a solution of equal parts (v/v) of 4% NaOH (w/w) and 24% H2O2 (v/v). The bleached fiber was submitted to enzymatic hydrolysis in sodium citrate buffer (0.1 M, pH 5), with a solids load of 15% (w/v) and an enzymatic load (Cellic Ctec 3 Novozymes®) of 10 mg / g of biomass in a shaker incubator at 50 °C. and 200 rpm for 48h. The characterizations were made by AFM measurements (Dimension V microscope - Veeco); X-ray diffraction (XRD) using a Shimadzu 6000 diffractometer with CuK ( = 1,54 Å), at room temperature and with 2 angle between 5 and 40° (1° min-1); thermogravimetric analysis (TGA) in an inert... Mostrar Tudo |
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Palavras-Chave: |
Physicochemical characterization; Rubberwood Biomass. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1149014/1/P-Cellulose-nanomaterials-from-rubberwood-obtained-via-enzymatic-hydrolysis.pdf
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Marc: |
LEADER 03650nam a2200205 a 4500
001 2149014
005 2024-01-22
008 2022 bl uuuu u00u1 u #d
100 1 $aSILVA, M. J.
245 $aCellulose nanomaterials from rubberwood obtained via enzymatic hydrolysis route.$h[electronic resource]
260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE QUÍMICA, 45., 2022, Maceió. Química para o Desenvolvimento Sustentável e Soberano. Livro de resumos. Maceió, AL: Aptor Software$c2022
520 $aNovel strategy for the production of advanced materials from the waste generated in natural rubber exploration can improve the whole production chain(PARASHAR and CHAWLA, 2021). Lignocellulosic biomass from rubberwood has the potential for several applications, being formed by cellulose, hemicellulose, lignin, and inorganic compounds in smaller amounts. In this context, this work shows the characterization of nanomaterials obtained via enzymatic hydrolysis from bleached fibers of rubber tree. The fibers were mercerized with 5% (w/w) aqueous sodium hydroxide solution for 2h at 80 °C. Afterwards, the fibers were bleached with a solution composed of equal parts (v/v) of acetate buffer (27% by weight NaOH and 7.5% (v/v) glacial acetic acid, in distilled water) and aqueous sodium chlorite (1.7% by weight NaClO2 in water). Then, the fibers were bleached twice with a solution of equal parts (v/v) of 4% NaOH (w/w) and 24% H2O2 (v/v). The bleached fiber was submitted to enzymatic hydrolysis in sodium citrate buffer (0.1 M, pH 5), with a solids load of 15% (w/v) and an enzymatic load (Cellic Ctec 3 Novozymes®) of 10 mg / g of biomass in a shaker incubator at 50 °C. and 200 rpm for 48h. The characterizations were made by AFM measurements (Dimension V microscope - Veeco); X-ray diffraction (XRD) using a Shimadzu 6000 diffractometer with CuK ( = 1,54 Å), at room temperature and with 2 angle between 5 and 40° (1° min-1); thermogravimetric analysis (TGA) in an inert atmosphere, using TA Instruments equipment, model Q500 with a heating rate of 10 °C/min from room temperature to 600 °C. The X-ray diffractograms showed that the main peaks corresponding to the crystallographic planes of Type I cellulose. The Bragg angles (2) were: 16.0°, 22.4° and 34.6°, with the highest intensity in the crystallographic plane (002). The crystallinity index, calculated according to the method proposed by Segal (1959), was 57.8% for in natura fiber, 75.1% for bleached fiber and 80.8% after hydrolysis. Analyzing the thermograms, it was observed that the Tonset of the fiber in natura was 289 °C, that of the bleached fiber was 292 °C and after the hydrolysis it was 327 °C. There was a change in the maximum degradation peak, in the final temperature of the process and in the amount of residue after the treatment. The AFM images exhibited structures rod-like shapes, with mean length of 349.9±169.6 nm and the diameter of 4.0±1.7 nm, after 48h to enzymatic hydrolysis. Our results showed that the obtained nanomaterials can be effectively extracted from the studied lignocellulosic source using the enzymatic route. The nanostructures showed high crystallinity, excellent thermal stability and high aspect ratio. Thus, nanomaterials presented important characteristics for the use in several applications, including as reinforcement.
653 $aPhysicochemical characterization
653 $aRubberwood Biomass
700 1 $aBONDANCIA, T. J.
700 1 $aAGUIAR, J. de
700 1 $aGONÇALVES, E. C. P.
700 1 $aFARINAS, C. S.
700 1 $aMARTINS, M. A.
700 1 $aMATTOSO, L. H. C.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 12 | |
| 1. |  | ZORTÉA-GUIDOLIN, M. E. B.; CARVALHO, C. W. P. de; GODOY, R. C. B. de. Potencial de uso do pinhão da araucária no desenvolvimento de produtos de conveniência por extrusão termoplástica. In: SEMINÁRIO SUL-BRASILEIRO SOBRE A SUSTENTABILIDADE DA ARAUCÁRIA, 3., 2018, Passo Fundo. Uso sustentável Produção Inovação Educação Legislação Conservação: anais. Passo Fundo: Livraria e editora Werlang, 2018. p. 24-27. p. 24-27 Organizadores Cristiano Roberto Buzatto, Nêmora Pauletti Prestes, Jaime Martinez, Alexandre Augusto Nienow.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Agroindústria de Alimentos; Embrapa Florestas. |
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| 3. | | ZORTÉA-GUIDOLIN, M. E. B.; CARVALHO, C. W. P. de; GODOY, R. C. B. de; DEMIATE, I. M.; SCHEER, A. P. Influence of extrusion cooking on in vitro digestibility, physical and sensory properties of brazilian pine seeds flour (Araucaria Angustifolia). Journal of Food Science, v. 82, n. 4, p. 977-984, 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Agroindústria de Alimentos; Embrapa Florestas. |
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| 4. | | IKEDA, M.; CARVALHO, C. W. P. de; HELM, C. V.; AZEREDO, H. M. C. de; GODOY, R. C. B. de; RIBANI, R. H. Influence of Brazilian pine seed flour addition on rheological, chemical and sensory properties of gluten-free rice flour cakes. Ciência Rural [online]. 2018, vol.48, n.6, e20170732. Epub June 28, 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Agroindústria de Alimentos; Embrapa Agroindústria Tropical; Embrapa Florestas. |
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| 5. | | FURTADO, M. R.; MATTA, V. M. da; CARVALHO, C. W. P. de; MAGALHAES, W. L. E.; ROSSI, A. L.; TONON, R. V. Characterization of spray-dried nanofibrillated cellulose and effect of different homogenization methods on the stability and rheological properties of the reconstituted suspension. Cellulose, v. 28, n. 1, p. 207-221, Jan. 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Agroindústria de Alimentos; Embrapa Florestas. |
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| 6. | | FURTADO, M. R.; MATTA, V. M. da; CARVALHO, C. W. P. de; SILVA, L. F. M. da; MAGALHAES, W. L. E.; TONON, R. V. Avaliação reológica da celulose de eucalipto em pó reidratada. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 9., 2017, São Carlos, SP. Anais ... São Carlos: Embrapa Instrumentação, 2017. p. 410-413.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 8. | | BARRETO, A. G.; GUERRA, A. F.; NOGUEIRA, R. I.; CARVALHO, C. W. P. de; GODOY, R. C. B. de; FREITAS, S. P. Functional peanut butter stuffed snack development based on Brazilian pine (Araucaria angustifolia) and rice flours. IOSR Journal of Engineering, v, 8, n. 7, p. 53-58, July 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 5 |
| Biblioteca(s): Embrapa Agroindústria de Alimentos; Embrapa Florestas. |
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| 10. | | GODOY, R. C. B. de; BARRETO, A. G.; CHÁVEZ, D. W. H.; SÁ, D. de G. C. F. de; NOGUEIRA, R. I.; CARVALHO, C. W. P. de; FREITAS, S. P. Aceitação de snacks de pinhão recheados com pasta de amendoim por consumidores curitibanos. In: EVENTOS ARAUCÁRIA: PESQUISA, INOVAÇÃO E TECNOLOGIAS PARA SISTEMAS DE PRODUÇÃO, ERVA-MATE XXI: INOVAÇÃO E TECNOLOGIAS PARA O SETOR ERVATEIRO, 2020. Anais. Colombo: Embrapa Florestas, 2021. p. 31. (Embrapa Florestas. Documentos, 344). Resumo.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 11. | | GODOY, R. C. B. de; CARVALHO, C. W. P. de; GUIDOLIN, M. E. B. Z.; IKEDA, M.; NOGUEIRA, R. I.; HELM, C. V.; CORNEJO, F. E. P.; COSTA, F. J. O. G. da; BARRETO, A. G. Valor nutricional e processamento do pinhão. In: SOUSA, V. A. de; FRITZSONS, E.; PINTO JUNIOR, J. E.; AGUIAR, A. V. de (ed.). Araucária: pesquisa e desenvolvimento no Brasil. Brasília, DF: Embrapa, 2021. cap. 16, p. 321-336.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Agroindústria de Alimentos; Embrapa Florestas. |
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| 12. | | CORNEJO, F. E. P.; NOGUEIRA, R. I.; CARVALHO, C. W. P. de; GODOY, R. C. B. de; OLIVEIRA, A. H.; SANTOS, L. F. C.; BARRETO, A. G.; FREITAS, S. P. Descascamento e secagem de pinhão (Araucaria angustifolia) para a obtenção de farinha. Rio de Janeiro: Embrapa Agroindústria de Alimentos, 2014. 3 p. (Embrapa Agroindústria de Alimentos. Comunicado técnico, 206).| Tipo: Comunicado Técnico/Recomendações Técnicas |
| Biblioteca(s): Embrapa Agroindústria de Alimentos; Embrapa Florestas. |
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| Registros recuperados : 12 | |
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