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| Martin, Nicolas; Davies, Peter; Baley, Christophe. |
| This paper presents results from an experimental study of three types of non-woven preforms (needlepunched, spunlaced and mat manufactured using a paper-making process) intended as composite reinforcement. These are potentially very attractive for transport applications. First, the influence of processing on elementary fiber tensile properties is shown to be limited. Then the preforms are evaluated in polypropylene matrix composites and mechanical properties are determined. The structure of non-woven reinforcements is strongly dependent on the manufacturing route. By varying the fiber content it is shown that the most efficient reinforcement for flax fibers is the mat produced by paper processing. The new spunlaced reinforced composites are shown to have... |
| Tipo: Text |
Palavras-chave: Flax fibers; Non-wovens; Composite materials; Polypropylene. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00307/41798/41241.pdf |
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| Martin, Nicolas; Davies, Peter; Baley, Christophe. |
| The industrial production of flax fibers yields two fibrous products: scutched fibers are valuable for their length, fineness and cleanness, while tows are entangled, impure and are low-priced. There is a need for technical data to compare these two kinds of fibers beyond the difference of appearance, and to assess their potential as composite material reinforcements. In this work, we have compared the properties of scutched flax and flax tows from the same batch. The morphology was first assessed by measuring the length, cleanness and fineness of fiber bundles. The tensile properties of single fibers and of unidirectionally reinforced epoxy composites were then measured. The results show that the morphology of flax tows is different from but close to the... |
| Tipo: Text |
Palavras-chave: Flax fibers; Scutching; Flax by-products; Composite materials. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00203/31403/41240.pdf |
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| Martin, Nicolas; Mouret, Nicolas; Davies, Peter; Baley, Christophe. |
| The flax quality required for composite applications is not yet well established. Retting is one of the steps that are not well defined for these applications, and is a critical parameter during flax production. In this study, the influence of the degree of retting of flax on the properties of short flax fiber/polypropylene composites has been assessed. First, the degree of retting of gradually retted flax was measured by both qualitative and quantitative experimental techniques. In addition, water sorption studies were performed. Furthermore, tensile tests were carried out on both single fiber and injected composite materials. The microstructure of the composites was analyzed by scanning electron microscopy and X-ray microtomography. Single fiber and... |
| Tipo: Text |
Palavras-chave: Flax fibers; Dew-retting; Composite materials; Polypropylene; Injection molding. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00160/27076/25475.pdf |
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