Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 5
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
A preliminary evaluation of matricaria maritimum fibres for polymer reinforcement ArchiMer
Davies, Peter; Bourmaud, A.; Pajot, A.; Baley, C..
This short communication describes results from a preliminary characterization of the dimensions and mechanical properties of matricaria maritimum fibres. The aim is to develop a complementary industrial application of these plants, which are grown along the coast mainly for pharmaceutical use. The fibres are shown to be of small diameter, 5-10 mu m, and tubular in form. Nano-indentation on fibres and tensile tests on fibre bundles provide an indication of the mechanical behaviour of these fibres, which are similar to those of sisal (leaf fibre) and miscanthus (grass fibre), and may be interesting for reinforcement of polymer matrix composites.
Tipo: Text Palavras-chave: Natural fibre; Nano-indentation; Tensile properties.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00042/15369/12790.pdf
Imagem não selecionada

Imprime registro no formato completo
Analyse du cycle de vie d’un biocomposite ArchiMer
Le Duigou, A.; Davies, Peter; Baley, C..
In addition to the impact on climate change resulting from the use of non renewable resources [1], the depletion of existing fossil fuel sources is inevitable. A major change of strategy is required. This article presents an analysis of a Flax fibre/PLLA biocomposite life cycle compared to common glass fibre reinforced polyester composites from manufacturing to mechanical design and end-of-life. Environmental impacts have been assessed by Standardized method called Life Cycle Analysis (ISO 14044). Flax fibre/PLLA biocomposites manufactured by film stacking have, for similar mass, tensile modulus close to that of Glass/Polyester. Besides being compostable at end of life, biocomposites have been proved to be recyclable which makes it possible to keep the...
Tipo: Text Palavras-chave: Biocomposites; Fibres végétales; Recyclage; Analyse de cycle de vie; Biocomposites; Vegetal fibres; Recycling; Life cycle analysis.
Ano: 2010 URL: https://archimer.ifremer.fr/doc/00480/59149/61778.pdf
Imagem não selecionada

Imprime registro no formato completo
Improved impact performance of marine sandwich panels using through-thickness reinforcement: Experimental results ArchiMer
Baral, N.; Cartie, D. D. R.; Partridge, I. K.; Baley, C.; Davies, Peter.
This paper presents results from a test developed to simulate the water impact (slamming) loading of sandwich boat structures. A weighted elastomer ball is dropped from increasing heights onto rigidly supported panels until damage is detected. Results from this test indicate that honeycomb core sandwich panels, the most widely used material for racing yacht hulls, start to damage due to core crushing at impact energies around 550 J. Sandwich panels of the same areal weight and with the same carbon/epoxy facings but using a novel foam core reinforced in the thickness direction with pultruded carbon fibre pins, do not show signs of damage until above 1200 J impact energy. This suggests that these will offer significantly improved resistance to wave impact....
Tipo: Text Palavras-chave: Honeycomb; Three-dimensional reinforcement; Impact behaviour; Mechanical testing.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00002/11311/7840.pdf
Imagem não selecionada

Imprime registro no formato completo
Protection of Flax/PLLA Biocomposites from Seawater Ageing by External Layers of PLLA ArchiMer
Le Duigou, A.; Deux, J. M.; Davies, Peter; Baley, C..
Biocomposites are sensitive to water, and previous work on flax reinforced PLLA showed a large drop in mechanical properties after immersion (Le Duigou et al. 2009). Unreinforced PLLA was much less sensitive. This paper presents a strategy to reduce the influence of wet ageing by adding extra layers of PLLA on the biocomposite surface. Weight gain measurements show that a PLLA coating 350 um thick reduces weight gain by half, and biocomposite stiffness and strength after ageing are improved by 100% compared to uncoated composite behaviour. Thermal analysis and microscopic examination are used to show damage mechanisms with and without protection. Property changes are shown to be quasilinearly related to weight gain.
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00044/15511/12898.pdf
Imagem não selecionada

Imprime registro no formato completo
Seawater ageing of flax/poly(lactic acid) biocomposites ArchiMer
Le Duigou, A.; Davies, Peter; Baley, C..
Natural fibre reinforced biopolymer composites, or biocomposites, are an alternative to the glass fibre reinforced thermoset composites widely used today in marine applications. Biocomposites offer good mechanical properties and total biodegradability, but if they are to be adopted for marine structures their durability in a seawater environment must be demonstrated. In the present study unreinforced PLLA (Poly(L-Lactic acid)), injected and film stacked flax composites with the same PLLA matrix have been examined. All the samples were aged in natural seawater at different temperatures in order to accelerate hygrothermal ageing. Changes to physico-chemical and mechanical behaviour have been followed by weight measurements, thermal and gel permeation...
Tipo: Text Palavras-chave: Mechanical properties; Hygrothermal ageing; Biopolymer; Natural fibre; Composites.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6639.pdf
Registros recuperados: 5
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional