Comparative study on the technological properties of latex and natural rubber from <i>Hancornia speciosa</i> Gomes and <i>Hevea brasiliensis</i>

Malmonge, José Antônio; Camillo, Egiane Carla; Moreno, R. M. B.; Mattoso, Luiz H. C.; McMahan, Colleen

doi:10.1002/app.29316

Cited by 27 publications

(32 citation statements)

References 16 publications

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“…NR latex was collected from Hevea brasiliensis trees (Clone RRIM 600) planted in the Experimental Farm of the University of São Paulo State (UNESP), campus of Ilha Solteira, Brazil, and stabilized in a commercial solution of ammonium hydroxide to avoid coagulation. The dry rubber content was determined by standard methods 13 .…”

Section: Methodsmentioning

confidence: 99%

“…PANI's mechanical properties can be improved by mixing it with a polymeric host matrix to form composites or blends . Many polymeric materials can be used as supports for PANI, such as cellulose nanofiber 5 , epoxy resin 7 , polyvinyl chloride (PVC) 4 , polyurethane 8 , poly(methyl methacrylate) (PMMA) 9 , and rubbers [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] . Among polymeric matrixes, natural rubber (NR) has been increasingly used for forming composites owing to its unique mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Electrical, mechanical, and thermal analysis of natural rubber/polyaniline-Dbsa composite

et al. 2014

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A composite of natural rubber (NR) with polyaniline (PANI) was obtained by mixing an aqueous dispersion of dodecylbenzenesulfonic acid (DBSA)-doped PANI with NR latex in different concentrations. Films were obtained by the casting method and characterized by ultraviolet visible near-infrared (UV-Vis-NIR) spectroscopy, thermogravimetry/differential thermogravimetry (TG/ DTG), stress-strain testing, differential scanning calorimetry (DSC), and DC electrical conductivity measurements. The UV-vis-NIR spectrum showed that PANI remained doped in the composite, and this improved the mechanical and electrical proprieties of NR films and afforded them good thermal stability up to ~200°C. The percolation threshold did not follow the universal critical exponent, and in this case, conduction preferentially occurs by hopping and tunneling.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrical, mechanical, and thermal analysis of natural rubber/polyaniline-Dbsa composite

et al. 2014

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“…The Hevea brasiliensis specie is by far the largest commercial source of NR due to its excellent quality, high rubber content and production capability [10]. Despite its origin in the Amazon Forest and the fact that Brazil had been the main rubber world producer and exporting country in the beginning of the last century, it only produced ca.…”

Section: Introductionmentioning

confidence: 99%

Extensional rheology of raw natural rubber from new clones of Hevea brasiliensis

Lotti

Moreno

Gonçalves

et al. 2011

Polymer Engineering & Sci

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Natural rubber (NR) is a biopolymer whose properties depend on the molecular structure of the 1,4‐cis polyisoprene chains, nonrubber constituents, environmental conditions, etc. NR has been characterized by Mooney viscosity, Wallace plasticity, nitrogen content (%N). However, these cannot effectively account for clone's differences. The aim of this work is to use extensional rheology to characterize and differentiate NR samples as for clone type and the season of the year in comparison to the traditional characterizations. Three IAC 300 series and RRIM 600 clones of Hevea brasiliensis tapped between October 2006 (Oct_06) and August 2008 (Aug_08) were investigated. IAC 329 clones showed the least susceptibility to seasonal changes, whereas RRIM 600 was the most influenced. An opposite trend between extensional viscosity (ηE) and %N was established. The former was very sensitive to changes in the molecular structure of NR, being fundamental for monitoring purposes and strategic development of new rubber tree clones. POLYM. ENG. SCI., 2012. © 2011 Society of Plastics Engineers

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“…Müll.Arg.). Ambos estudos compararam as propriedades da borracha obtidas da mangabeira e da seringueira, um de maneira mais geral (Malmonge et al 2009), outro, avaliando especificamente a degradação não isotérmica da borracha natural obtida de ambas espécies (Medeiros et al 2010). …”

Section: Ciências Agráriasunclassified

Coletânea bibliográfica acadêmica sobre a mangabeira (Hancornia speciosa Gomes)

Oliveira

Cruz

Freitas

et al. 2017

G. Sci.

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resumo -A mangabeira (Hancornia speciosa Gomes) é uma árvore nativa do Brasil, cujo fruto é obtido predominantemente de forma extrativista e apreciado tanto in natura quanto na forma de polpas, geleias, doces. As raízes, cascas e látex possuem uso medicinal e sua madeira é usada como combustível. Ocorre do Nordeste até os Cerrados das regiões Centro-Oeste, Norte e Sudeste. Entende-se que estudos científicos sobre espécies nativas de base extrativista são essenciais a fim de subsidiar estratégias para a conservação da espécie. O presente trabalho objetivou analisar as publicações acadêmicas sobre a mangabeira disponíveis na plataforma de periódicos da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Capes), utilizando os princípios da bibliometria. As buscas aconteceram por meio das palavras chave: "mangaba", "mangabeira" e "Hancornia speciosa Gomes", o que resultou em 103 publicações sobre a espécie. Essas publicações foram classificadas de acordo com o ano, o tipo e o periódico de publicação; e, de acordo com o seu conteúdo, enquadradas nas áreas de conhecimento estabelecidas pela Capes. Após o enquadramento verificou-se que 40,8% das pesquisas estão relacionadas às Ciências Biológicas, 19,4% às Ciências de Alimentos, 13,6% às Ciências Agrárias, 10,7% às Ciências da Saúde, 7,8% às Ciências Multidisciplinares e 1,9% às Ciências Sociais Aplicadas. Constatou-se que há poucos estudos sobre aspectos socioeconômicos, ecológicos e culturais, o que indica a necessidade de mais estudos sob esses enfoques para subsidiar estratégias para a conservação da espécie. Palavras-Chave: Mangaba; periódicos; biblioMetria; sustentabilidade.ComPilation aCademiC literature on mangabeira (Hancornia speciosa gomes) abstraCt -The mangabeira (Hancornia speciosa Gomes) is a tree native to Brazil, whose fruit is obtained predominantly extractive way e appreciated both in nature e in the form of pulps, jellies, jams, etc. Their roots, bark e latex have medicinal uses e its wood is used as fuel. Is the Northeast to the Cerrado of the Center-West, North e East of the country. It is understood that scientific studies of native species of extractive base are essential in order to support strategies for the conservation of the species.

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Comparative study on the technological properties of latex and natural rubber from Hancornia speciosa Gomes and Hevea brasiliensis

Cited by 27 publications

References 16 publications

Electrical, mechanical, and thermal analysis of natural rubber/polyaniline-Dbsa composite

Electrical, mechanical, and thermal analysis of natural rubber/polyaniline-Dbsa composite

Extensional rheology of raw natural rubber from new clones of Hevea brasiliensis

Coletânea bibliográfica acadêmica sobre a mangabeira (Hancornia speciosa Gomes)

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