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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
05/04/2021 |
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Data da última atualização: |
05/04/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, R. F.; RIBEIRO, J. C. L.; CARVALHO, J. M. F. de; MAGALHAES, W. L. E.; PEDROTI, L. G.; NALON, G. H.; LIMA, G. E. S. de. |
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Afiliação: |
RODRIGO FELIPE SANTOS, UFV; JOSÉ CARLOS LOPES RIBEIRO, UFV; JOSÉ MARIA FRANCO DE CARVALHO, UFV; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; LEONARDO GONÇALVES PEDROTI, UFV; GUSTAVO HENRIQUE NALON, UFV; GUSTAVO EMILIO SOARES DE LIMA, UFV. |
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Título: |
Nanofibrillated cellulose and its applications in cement-based composites: a review. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Construction and Building Materials, v. 288, 123122, June 2021. 17 p. |
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DOI: |
https://doi.org/10.1016/j.conbuildmat.2021.123122 |
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Idioma: |
Inglês |
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Conteúdo: |
Cellulose is an abundant and biodegradable natural material that is not derived from petroleum. With the growing demand for high-performance materials, the interest in using nanocelluloses in different areas has increased. Nanofibrillated celluloses (NFCs) are result from mechanical processing of cellulose fibers, with or without chemical pretreatments. Characteristics such as large surface area, hydroxyl groups on their surface, high mechanical strength, and high length/width ratio give NFC beneficial effects when incorporated into cement composites. This work presents a review of researches carried out in recent years in the area of cement systems incorporating NFC. The characteristics of these nanocelluloses, their production, and the effect that the nanomaterial has on the behavior of cement composites are presented. It was observed that the addition of NFC brings relevant increases in mechanical properties. The maximum increments reported in the literature were 43% in compressive strength, 106% in flexural strength, 5% in modulus of elasticity, 71% in flexural modulus, 50% in fracture energy, and 192% in toughness. Furthermore, NFC has the potential to enhance the durability of the cement composites, since the nanoadmixtures provided cement matrices with lower sulfate penetration (~50%), greater thermal resistance (no microcracks at 250 C), and greater resistance to accelerated aging (an increase of 20% in flexural strength and 25% in modulus of elasticity after 200 wet-dry cycles). MenosCellulose is an abundant and biodegradable natural material that is not derived from petroleum. With the growing demand for high-performance materials, the interest in using nanocelluloses in different areas has increased. Nanofibrillated celluloses (NFCs) are result from mechanical processing of cellulose fibers, with or without chemical pretreatments. Characteristics such as large surface area, hydroxyl groups on their surface, high mechanical strength, and high length/width ratio give NFC beneficial effects when incorporated into cement composites. This work presents a review of researches carried out in recent years in the area of cement systems incorporating NFC. The characteristics of these nanocelluloses, their production, and the effect that the nanomaterial has on the behavior of cement composites are presented. It was observed that the addition of NFC brings relevant increases in mechanical properties. The maximum increments reported in the literature were 43% in compressive strength, 106% in flexural strength, 5% in modulus of elasticity, 71% in flexural modulus, 50% in fracture energy, and 192% in toughness. Furthermore, NFC has the potential to enhance the durability of the cement composites, since the nanoadmixtures provided cement matrices with lower sulfate penetration (~50%), greater thermal resistance (no microcracks at 250 C), and greater resistance to accelerated aging (an increase of 20% in flexural strength and 25% in modulus of elasticity after 200 wet... Mostrar Tudo |
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Palavras-Chave: |
Cement composites; Civil construction; Compósito; Construção civil; Durabilidade; Mechanical performance; Nanofibrillated celluloses; Nanofribilas de celulose. |
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Thesagro: |
Cimento. |
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Thesaurus Nal: |
Durability. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02519naa a2200325 a 4500
001 2131047
005 2021-04-05
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.conbuildmat.2021.123122$2DOI
100 1 $aSANTOS, R. F.
245 $aNanofibrillated cellulose and its applications in cement-based composites$ba review.$h[electronic resource]
260 $c2021
520 $aCellulose is an abundant and biodegradable natural material that is not derived from petroleum. With the growing demand for high-performance materials, the interest in using nanocelluloses in different areas has increased. Nanofibrillated celluloses (NFCs) are result from mechanical processing of cellulose fibers, with or without chemical pretreatments. Characteristics such as large surface area, hydroxyl groups on their surface, high mechanical strength, and high length/width ratio give NFC beneficial effects when incorporated into cement composites. This work presents a review of researches carried out in recent years in the area of cement systems incorporating NFC. The characteristics of these nanocelluloses, their production, and the effect that the nanomaterial has on the behavior of cement composites are presented. It was observed that the addition of NFC brings relevant increases in mechanical properties. The maximum increments reported in the literature were 43% in compressive strength, 106% in flexural strength, 5% in modulus of elasticity, 71% in flexural modulus, 50% in fracture energy, and 192% in toughness. Furthermore, NFC has the potential to enhance the durability of the cement composites, since the nanoadmixtures provided cement matrices with lower sulfate penetration (~50%), greater thermal resistance (no microcracks at 250 C), and greater resistance to accelerated aging (an increase of 20% in flexural strength and 25% in modulus of elasticity after 200 wet-dry cycles).
650 $aDurability
650 $aCimento
653 $aCement composites
653 $aCivil construction
653 $aCompósito
653 $aConstrução civil
653 $aDurabilidade
653 $aMechanical performance
653 $aNanofibrillated celluloses
653 $aNanofribilas de celulose
700 1 $aRIBEIRO, J. C. L.
700 1 $aCARVALHO, J. M. F. de
700 1 $aMAGALHAES, W. L. E.
700 1 $aPEDROTI, L. G.
700 1 $aNALON, G. H.
700 1 $aLIMA, G. E. S. de
773 $tConstruction and Building Materials$gv. 288, 123122, June 2021. 17 p.
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Registro original: |
Embrapa Florestas (CNPF) |
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Biblioteca |
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Tipo/Formato |
Classificação |
Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
30/12/2020 |
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Data da última atualização: |
09/08/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
INOUE, R. C.; ONO, E. O.; BARBOSA, M. A. G.; QUEIROZ, M. A. de; TERAO, D.; WEBER, R. E. H.; RODRIGUES, J. D. |
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Afiliação: |
RÚBIA CAMARGO INOUE; ELIZABETH ORIKA ONO, FCA-UNESP; MARIA ANGELICA GUIMARAES BARBOSA, CPATSA; MANOEL ABÍLIO DE QUEIROZ, UNEB; DANIEL TERAO, CNPMA; RONALD ERNST HEINRICH WEBER; JOÃO DOMINGOS RODRIGUES. |
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Título: |
Citocinina, piraclostrobina e putrescina: influência no desenvolvimento de mudas em três cultivares de videira. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
In: CONGRESSO ONLINE DE AGRONOMIA CONVIBRA, 8., 2020, São Paulo. Anais eletrônicos... São Paulo: Instituto Pantex de Pesquisa, 2020. |
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Páginas: |
Np. |
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Idioma: |
Português |
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Conteúdo: |
Este trabalho objetivou estudar a produção de mudas dos cultivares Niagara Rosada no ambiente de Botucatu, SP, Isabel Precoce e Thompson Seedless enxertadas sobre o porta-enxerto IAC 766, nos ambientes de Petrolina, PE e Juazeiro, BA utilizando-se os reguladores vegetais, poliaminas e citocininas (CK), e fungicida (piraclostrobina). Os tratamentos utilizados foram: T1- Testemunha (água); T2? Putrescina (Put, 2mM); T3? Citocinina (CK, 6-BA 20 mg L-1); T4? Piraclostrobina (Pira, 200 g 100 L-1); T5- Put + CK; T6- Put + Pira; T7- Pira + CK; T8- CKvia foliar (20 mg L-1) +via solo (40 mg L-1), com aplicações realizadas uma vez por semana, num total de três aplicações. Para verificar o efeito dos tratamentos avaliou-se a taxa de crescimento, o número de folhas, massa fresca e seca de folha e raiz nos três cultivares estudados nos diferentes ambientes, bem como suas interações de acordo com cada produto (putrescina; citocinina e piraclostrobina), isolados e em combinações. Os reguladores vegetais e o fungicida utilizados promoveram respostas fisiológicas positivas nas mudas de videira ?Niagara Rosada?, ?Isabel Precoce? e ?Thompson Seedless?. Houve interações entre cultivares e tratamentos, tratamentos e ambientes e cultivares e ambientes, porém esta última de pouca magnitude. Os produtos aplicados podem ser utilizados nos diferentes ambientes e nos cultivares estudados. Abstract: This work aimed to study the production of ?Niagara Rosada? seedlings in an environment located at Botucatu, state of São Paulo, as well as seedlings of ?Isabel Precoce? and ?Thompson Seedless? on rootstock IAC 766 in environments in Petrolina, state of Pernambuco, and Juazeiro, state of Bahia, using plant growth regulators, polyamines and cytokinin (CK), and fungicide (pyraclostrobin). The used treatments were: T1- Control (water); T2? Putrescine (Put, 2 mM); T3? Cytokinin (CK, 6-BA 20 mg L-1); T4? Pyraclostrobin (Pira, 200 g 100 L-1); T5- Put + CK; T6- Put + Pira; T7- Pira + CK; T8- CK via leaves (20 mg L-1) + applied to soil (40 mg L-1), with applications carried out once a week, at a total of three applications. In order to verify the effectiveness of the treatments, the three cultivars in the various environments were assessed as to growth rate, number of leaves, leaf and root fresh weight, leaf and root dry weight, as well as to the interactions according to each product (Putrescine, Cytokinin, Pyraclostrobin), isolated and combined. The used plant growth regulators and fungicide promoted positive physiological responses in the seedlings of Niagara Rosada, Isabel Precoce and Thompson Seedless. There were interactions between cultivars x treatments, treatments x environments and cultivars x environments, although the latter was of lesser importance. The applied products can be used for the studied environments and cultivars. MenosEste trabalho objetivou estudar a produção de mudas dos cultivares Niagara Rosada no ambiente de Botucatu, SP, Isabel Precoce e Thompson Seedless enxertadas sobre o porta-enxerto IAC 766, nos ambientes de Petrolina, PE e Juazeiro, BA utilizando-se os reguladores vegetais, poliaminas e citocininas (CK), e fungicida (piraclostrobina). Os tratamentos utilizados foram: T1- Testemunha (água); T2? Putrescina (Put, 2mM); T3? Citocinina (CK, 6-BA 20 mg L-1); T4? Piraclostrobina (Pira, 200 g 100 L-1); T5- Put + CK; T6- Put + Pira; T7- Pira + CK; T8- CKvia foliar (20 mg L-1) +via solo (40 mg L-1), com aplicações realizadas uma vez por semana, num total de três aplicações. Para verificar o efeito dos tratamentos avaliou-se a taxa de crescimento, o número de folhas, massa fresca e seca de folha e raiz nos três cultivares estudados nos diferentes ambientes, bem como suas interações de acordo com cada produto (putrescina; citocinina e piraclostrobina), isolados e em combinações. Os reguladores vegetais e o fungicida utilizados promoveram respostas fisiológicas positivas nas mudas de videira ?Niagara Rosada?, ?Isabel Precoce? e ?Thompson Seedless?. Houve interações entre cultivares e tratamentos, tratamentos e ambientes e cultivares e ambientes, porém esta última de pouca magnitude. Os produtos aplicados podem ser utilizados nos diferentes ambientes e nos cultivares estudados. Abstract: This work aimed to study the production of ?Niagara Rosada? seedlings in an environment located at Botuc... Mostrar Tudo |
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Palavras-Chave: |
6-benzilaminopurina; 6-benzylaminopurine; Crescimento vegetativo; Efeito fisiológico; Estrobirulinas; Interação genótipo x ambiente; Physiological effect; Poliaminas; Strobilurins. |
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Thesagro: |
Estimulante de Crescimento Vegetal; Muda; Uva. |
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Thesaurus NAL: |
Genotype-environment interaction; Grapes; Growth regulators; Polyamines; Vegetative growth. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/219786/1/Citocinina-piraclostrobina-e-putrescina-2020.pdf
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Marc: |
LEADER 04125nam a2200397 a 4500
001 2128870
005 2023-08-09
008 2020 bl uuuu u00u1 u #d
100 1 $aINOUE, R. C.
245 $aCitocinina, piraclostrobina e putrescina$binfluência no desenvolvimento de mudas em três cultivares de videira.$h[electronic resource]
260 $aIn: CONGRESSO ONLINE DE AGRONOMIA CONVIBRA, 8., 2020, São Paulo. Anais eletrônicos... São Paulo: Instituto Pantex de Pesquisa$c2020
300 $aNp.
520 $aEste trabalho objetivou estudar a produção de mudas dos cultivares Niagara Rosada no ambiente de Botucatu, SP, Isabel Precoce e Thompson Seedless enxertadas sobre o porta-enxerto IAC 766, nos ambientes de Petrolina, PE e Juazeiro, BA utilizando-se os reguladores vegetais, poliaminas e citocininas (CK), e fungicida (piraclostrobina). Os tratamentos utilizados foram: T1- Testemunha (água); T2? Putrescina (Put, 2mM); T3? Citocinina (CK, 6-BA 20 mg L-1); T4? Piraclostrobina (Pira, 200 g 100 L-1); T5- Put + CK; T6- Put + Pira; T7- Pira + CK; T8- CKvia foliar (20 mg L-1) +via solo (40 mg L-1), com aplicações realizadas uma vez por semana, num total de três aplicações. Para verificar o efeito dos tratamentos avaliou-se a taxa de crescimento, o número de folhas, massa fresca e seca de folha e raiz nos três cultivares estudados nos diferentes ambientes, bem como suas interações de acordo com cada produto (putrescina; citocinina e piraclostrobina), isolados e em combinações. Os reguladores vegetais e o fungicida utilizados promoveram respostas fisiológicas positivas nas mudas de videira ?Niagara Rosada?, ?Isabel Precoce? e ?Thompson Seedless?. Houve interações entre cultivares e tratamentos, tratamentos e ambientes e cultivares e ambientes, porém esta última de pouca magnitude. Os produtos aplicados podem ser utilizados nos diferentes ambientes e nos cultivares estudados. Abstract: This work aimed to study the production of ?Niagara Rosada? seedlings in an environment located at Botucatu, state of São Paulo, as well as seedlings of ?Isabel Precoce? and ?Thompson Seedless? on rootstock IAC 766 in environments in Petrolina, state of Pernambuco, and Juazeiro, state of Bahia, using plant growth regulators, polyamines and cytokinin (CK), and fungicide (pyraclostrobin). The used treatments were: T1- Control (water); T2? Putrescine (Put, 2 mM); T3? Cytokinin (CK, 6-BA 20 mg L-1); T4? Pyraclostrobin (Pira, 200 g 100 L-1); T5- Put + CK; T6- Put + Pira; T7- Pira + CK; T8- CK via leaves (20 mg L-1) + applied to soil (40 mg L-1), with applications carried out once a week, at a total of three applications. In order to verify the effectiveness of the treatments, the three cultivars in the various environments were assessed as to growth rate, number of leaves, leaf and root fresh weight, leaf and root dry weight, as well as to the interactions according to each product (Putrescine, Cytokinin, Pyraclostrobin), isolated and combined. The used plant growth regulators and fungicide promoted positive physiological responses in the seedlings of Niagara Rosada, Isabel Precoce and Thompson Seedless. There were interactions between cultivars x treatments, treatments x environments and cultivars x environments, although the latter was of lesser importance. The applied products can be used for the studied environments and cultivars.
650 $aGenotype-environment interaction
650 $aGrapes
650 $aGrowth regulators
650 $aPolyamines
650 $aVegetative growth
650 $aEstimulante de Crescimento Vegetal
650 $aMuda
650 $aUva
653 $a6-benzilaminopurina
653 $a6-benzylaminopurine
653 $aCrescimento vegetativo
653 $aEfeito fisiológico
653 $aEstrobirulinas
653 $aInteração genótipo x ambiente
653 $aPhysiological effect
653 $aPoliaminas
653 $aStrobilurins
700 1 $aONO, E. O.
700 1 $aBARBOSA, M. A. G.
700 1 $aQUEIROZ, M. A. de
700 1 $aTERAO, D.
700 1 $aWEBER, R. E. H.
700 1 $aRODRIGUES, J. D.
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