Improved mechanical properties of carbon nanotubes-coated flax fiber reinforced composites

Li, Yan; Chen, Chaozhong; Xu, Jie; Zhang, Zhongsen; Yuan, Bingyan; Huang, Xiaolei

doi:10.1007/s10853-014-8668-3

Cited by 77 publications

(44 citation statements)

References 23 publications

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“…7 Morphologies of both epoxy matrix and flax yarn after single yarn pull-out tests. a and e untreated, b and f 0.5 wt%, c and g 1.0 wt%, and d and h 2.0 wt% CNTs [39] fibrils in the cell wall, which was not affected by the present treatment as expected.…”

Section: Enhancement Of Mechanical Properties Of Plant Fiberssupporting

confidence: 77%

“…5, with silane treatment generating the highest values for the fiber types tested due to the chemical bonds set up between plant fibers and the polymer matrix [38]. By taking advantage of the nanoscaled structure of fibrils of plant fibers, carbon nanotubes (CNTs) were grafted onto the surfaces of flax yarns [39]. The CNTs used were carboxylfunctionalized multiwall carbon nanotubes, and the -COOH content was 2.56 wt% which may form strong hydrogen bonds between the modified CNTs and the fibers.…”

Section: Poor Interfacial Bonding Between Plant Fibers and Polymersmentioning

confidence: 99%

“…Three ways of adding multiwall carbon nanotubes (MWCNTs) to the composite laminates were attempted, which were mixing CNTs with the resin [43], interleaving buckypaper (BP) between fabric layers [39], and coating CNTs onto flax fibers using a Bsoaking or spray-drying^process [42] as shown in Fig. 10.…”

Section: Enhancement Of Mechanical Properties Of the Compositesmentioning

confidence: 99%

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An overview of structural-functional-integrated composites based on the hierarchical microstructures of plant fibers

et al. 2018

Adv Compos Hybrid Mater

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Plant fiber-reinforced composites have raised great attention among materials scientists and engineers during the past decade. Most of the efforts were put on the interfacial modifications to improve the mechanical properties of the composites so that they could partly replace the currently largely used glass fiber-reinforced composites. The modifications were mainly focused on the surface treatment of plant fibers so that mechanical or chemical bonding between plant fibers and polymeric matrices could be set up. However, the unique hierarchical microstructures of plant fibers make the building up of multiscale interfaces possible so that more forces or energies would be needed to fracture the plant fiber-reinforced composites. The additional hollow structures could also bring benefits for sound absorption and damping properties. Therefore, this article reviewed R&D efforts to develop structural and functional-integrated plant fiber-reinforced composites by fully taking advantage of the hierarchical microstructures of plant fibers. Firstly, the unique hierarchical structures of plant fibers were revealed and hierarchical theoretical models for mechanical properties were discussed. Then, the modification, characterization, and evaluation of plant fibers in terms of their interfacial properties with polymeric matrices, especially by nanotechnologies with the consideration of their unique hierarchical microstructures, were reviewed. Finally, the design and manufacture of quasi-structures and structural-damping components using technologies that have been fully adapted to state-of-the-art industrial processes for use in critical applications, such as aircraft interiors, rail transportation vehicles, and constructions, were also introduced.

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Section: Enhancement Of Mechanical Properties Of Plant Fiberssupporting

confidence: 77%

Section: Poor Interfacial Bonding Between Plant Fibers and Polymersmentioning

confidence: 99%

Section: Enhancement Of Mechanical Properties Of the Compositesmentioning

confidence: 99%

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An overview of structural-functional-integrated composites based on the hierarchical microstructures of plant fibers

et al. 2018

Adv Compos Hybrid Mater

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“…It was observed that crack propagation in the flax composite was accompanied by extensive fibre bridging. Li et al [22] have successfully increased the interlaminar facture energy, G c , of UD flax-fibre/epoxy matrix composites by about 30 %, to give a value of 1350 J/m 2 , by introducing 1 wt% of multi-walled carbonnanotubes onto the surfaces of the FF. Kafi et al [23] have studied woven jute-fibre/polyester-matrix composites and achieved values of G c of about 1800 J/m 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Apart from wet-impregnation [8,12,28], NFRP composites based upon thermosetting matrices have been successfully processed via the relatively inexpensive infusiontype manufacturing methods such as resin infusion under flexible-tooling (RIFT) [10,22,29] or closed mould resintransfer moulding [12,18,20]. Although moisture in natural fibres, present when the NFRP composite is manufactured, is generally considered to be detrimental to the fibre-matrix interface adhesion, drying the fibres prior to infusion has not been conventionally practised.…”

Section: Introductionmentioning

confidence: 99%

Tough, natural-fibre composites based upon epoxy matrices

et al. 2015

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Flax fibres and cellulose fibres were used to manufacture composites with particle-modified epoxy matrices in order to develop 'green' composites which possess relatively high values of interlaminar fracture energy, G c . The flax used had a unidirectional architecture of continuous yarns spun from short, interlocked fibres. The regenerated cellulose consisted of continuous and nontwisted pure cellulose fibres in a plain-woven architecture. The natural-fibre-reinforced-polymer (NFRP) composites employed an anhydride-cured diglycidyl ether of bisphenol-A epoxy as the matrix. The epoxy polymeric matrix was modified with (a) silica nanoparticles, (b) rubber microparticles, and (c) a combination of both of these types of particles to give a hybrid-toughened epoxy matrix. The composites were manufactured via a resin infusion under flexible-tooling (RIFT) process. Preliminary studies on the NFRP composites manufactured using the initial-RIFT process clearly showed the deleterious effect that moisture present in the natural fibres had upon the properties of the NFRP composites, since the trapped water cannot escape from the composite panel. Hence, an optimised-RIFT process was developed whereby the natural fibres were dried in a fan oven prior to being employed in the RIFT process. This reduced the water content of the fibres from around 9 to 10 wt% to about 1 wt%. Significant improvements in the physical and mechanical properties were recorded for the NFRP composites manufactured using this optimised-RIFT process. Indeed, in particular, very dramatic improvements in the G c of the NFRP composites were measured, especially when the epoxy polymeric matrix was modified using the silica nanoparticles and/or rubber microparticles. For example, a steady-state propagation value of G c of about 1935 J/m 2 was measured for the flax-fibre composite with the hybrid epoxy matrix, compared to values of 1110 and 535 J/m 2 for the flax-fibre and glass-fibre composites based on the unmodified (i.e., the 'control') epoxy matrix, respectively.

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