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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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 | Acesso ao texto completo restrito à biblioteca da Embrapa Semiárido. Para informações adicionais entre em contato com cpatsa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Semiárido; Embrapa Tabuleiros Costeiros. |
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Data corrente: |
24/09/2018 |
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Data da última atualização: |
27/02/2019 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
RANGEL, J. H. de A.; AMARAL, A. J. do; MUNIZ, E. N.; ZONTA, J. H.; DI STEFANO, J. G.; SANTOS, R. D. dos; TONUCCI, R. G.; MORAES, S. A. de; SOUZA, S. F. de; PIOVEZAN, U. |
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Afiliação: |
JOSE HENRIQUE DE ALBUQUERQUE RANGEL, CPATC; ANDRE JULIO DO AMARAL, CNPS; EVANDRO NEVES MUNIZ, CPATC; JOAO HENRIQUE ZONTA, CNPA; JOSE GERALDO DI STEFANO, CNPA; RAFAEL DANTAS DOS SANTOS, CPATSA; RAFAEL GONCALVES TONUCCI, CNPC; SALETE ALVES DE MORAES, CPATSA; SAMUEL FIGUEIREDO DE SOUZA, CPATC; UBIRATAN PIOVEZAN, CPATC. |
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Título: |
Estado da arte e estudo de caso em sistemas integrados de produção agropecuária no Nordeste do Brasil. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
In: SOUZA, E. D. de; SILVA, F. D. da; ASSMANN, T. S.; CARNEIRO, M. A. C.; CARVALHO, P. C. de F.; PAULINO, H. B. (Ed.). Sistemas integrados de produção agropecuária no Brasil. Tubarão: Copiart, 2018. cap. 17, p. 301-318. |
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Idioma: |
Português |
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Conteúdo: |
Pesquisa SIPA no Nordeste brasileiro; Zona da Mata e Agreste; Projeto em rede para transferência de tecnologia em ILPF; Principais combinações de culturas e estimativas nos Estados do Nordeste com potencial para implantação SIPA; Estratégias para seleção de locais para implantação de uma unidade de referência tecnológica; Unidades de referência tecnológica no Projeto Nordeste: Estado do Ceará; Estado do Rio Grande do Norte; Estado da Paraíba; Estado de Pernambuco; Estado de Alagoas; estado de Sergipe; Estado da Bahia; Caso de sucesso de adoção da tecnologia URT Fazenda Umbuzeiro doce: SIPA e agricultura familiar. |
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Palavras-Chave: |
ILPF; SIPA; Unidade de Referência Tecnológica; URT Fazenda Umbuzeiro. |
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Thesagro: |
Desenvolvimento Rural; Produção Agrícola; Produção Animal; Sistema de Produção. |
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Thesaurus NAL: |
Rural development. |
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Categoria do assunto: |
E Economia e Indústria Agrícola |
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Marc: |
LEADER 01793naa a2200337 a 4500
001 2096192
005 2019-02-27
008 2018 bl uuuu u00u1 u #d
100 1 $aRANGEL, J. H. de A.
245 $aEstado da arte e estudo de caso em sistemas integrados de produção agropecuária no Nordeste do Brasil.
260 $c2018
520 $aPesquisa SIPA no Nordeste brasileiro; Zona da Mata e Agreste; Projeto em rede para transferência de tecnologia em ILPF; Principais combinações de culturas e estimativas nos Estados do Nordeste com potencial para implantação SIPA; Estratégias para seleção de locais para implantação de uma unidade de referência tecnológica; Unidades de referência tecnológica no Projeto Nordeste: Estado do Ceará; Estado do Rio Grande do Norte; Estado da Paraíba; Estado de Pernambuco; Estado de Alagoas; estado de Sergipe; Estado da Bahia; Caso de sucesso de adoção da tecnologia URT Fazenda Umbuzeiro doce: SIPA e agricultura familiar.
650 $aRural development
650 $aDesenvolvimento Rural
650 $aProdução Agrícola
650 $aProdução Animal
650 $aSistema de Produção
653 $aILPF
653 $aSIPA
653 $aUnidade de Referência Tecnológica
653 $aURT Fazenda Umbuzeiro
700 1 $aAMARAL, A. J. do
700 1 $aMUNIZ, E. N.
700 1 $aZONTA, J. H.
700 1 $aDI STEFANO, J. G.
700 1 $aSANTOS, R. D. dos
700 1 $aTONUCCI, R. G.
700 1 $aMORAES, S. A. de
700 1 $aSOUZA, S. F. de
700 1 $aPIOVEZAN, U.
773 $tIn: SOUZA, E. D. de; SILVA, F. D. da; ASSMANN, T. S.; CARNEIRO, M. A. C.; CARVALHO, P. C. de F.; PAULINO, H. B. (Ed.). Sistemas integrados de produção agropecuária no Brasil. Tubarão: Copiart, 2018. cap. 17, p. 301-318.
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Embrapa Tabuleiros Costeiros (CPATC) |
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