Effect of surface treatment in cork reinforced composites

F., Ben Abdallah,; Cheikh, Ridha Ben; Baklouti, M.; Denchev, Z.; Cunha, António M.

doi:10.1007/s10965-009-9339-y

Cited by 47 publications

(26 citation statements)

References 20 publications

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“…The combination of cork with polymers trough melt based technologies brought added-value to cork based materials that can promote the development of a wide range of innovative applications. Studies can be found on the combination of cork and cork by-products with polyolefins such as polyethylene (PE) and polypropylene (PP) and the effect of adding coupling agent in the mechanical properties [13][14][15], chemical surface modification to improve cork-polymer compatibility [16,17]; cork in sandwich composite structures [18][19][20] and hybrid cork composite reinforced with natural fibres [21,22]. Recently, the combination of the unique properties of cork with biodegradable matrices [23,24] was also studied aiming the production of more sustainable materials.…”

Section: Introductionmentioning

confidence: 99%

Cork–polymer biocomposites: Mechanical, structural and thermal properties

et al. 2015

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a b s t r a c tThis work addresses to the preparation of biocomposites resulting from the combination of different biodegradable aliphatic polyesters with cork (30 wt.%). The lignocellulosic biomass with closed cellular structure was compounded with poly(L-lactic acid) (PLLA), polyhydroxybutyrate-co-hydroxyvalerate (PHBV), poly-e-caprolactone (PCL) and starch-poly-e-caprolactone (SPCL) blend using a twin-screw extruder prior to injection moulding into tensile samples. The physico-mechanical and thermal properties of the matrices and the bio-based cork composites were investigated. This study shows that the addition of cork contributes to produce lightweight materials using PLLA and PHBV matrices and promotes an increase on the stiffness of PCL. The fracture morphology observations showed good physical cork-matrix bonding with absence of voids or cavities between cork and the bio-based polyesters. Cork increases the crystallinity degree of the biocomposites. These findings suggest that the cork-polymer biocomposites are a viable alternative to develop more sustainable composite materials, such as automotive interior parts and bio-based caps for wine bottles as it has been shown as proof-of-concept.

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Section: Introductionmentioning

confidence: 99%

Cork–polymer biocomposites: Mechanical, structural and thermal properties

et al. 2015

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“…Cellulosic and lignocellulosic fibers have high strength and modulus, thus contributing to the improvement of the mechanical properties of composites [13][14][15]. They also carry surface hydroxyl groups able to form covalent bonds by chemical reaction with the isocyanate groups present in the polymer matrix formulation and thus, improving the interfacial adhesion [16].…”

Section: Introductionmentioning

confidence: 99%

Moisture dependence of the properties of composites made from tung oil based polyurethane and wood flour

et al. 2012

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Natural composites prepared from a polyurethane (PU) based on tung oil and different percentages of wood flour (WF) or microcellulose (MC) were exposed to humid environments and the resulting changes of their properties were evaluated. The equilibrium moisture content of the composites increased with the wood flour percentage. Dynamic mechanical tests performed during temperature scans revealed the changes resulting from moisture absorption on the main transition temperature of the matrix as well as on the storage modulus. The tensile mechanical properties of the materials were also strongly affected by moisture. The different degree of dispersion achieved during the incorporation of WF and MC into the matrix was considered the main reason for the different effect of each filler on the thermal and mechanical properties of the resulting composites.

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“…Cork is a material closed cell with prismatic cells that work together and is a material elastically orthotropic axisymmetric relative to the direction of the tree. However, the properties of an adhesive/cork composite are not only dependent on the material properties, but also on the interfacial adhesion properties between the cork and the resin, size and amount of cork particles and mixing conditions, as already stated in the previous sections [156].…”

Section: Cork As Reinforcement Materialsmentioning

confidence: 86%

Methods to increase the toughness of structural adhesives with micro particles: an overview with focus on cork particles

Barbosa

Silva

Öchsner

2016

Materialwissenschaft Werkst

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Structural adhesives are used increasingly in new applications replacing conventional joining methods. Epoxy adhesives have the widest range of application of the various classes of adhesives arising principally from their extremely wide set of performance properties. They are known for their high stiffness and strength, as well for their low ductility and toughness. Currently, there is an increasing interest in developing methods of improving toughness. A toughened adhesive in general contains elastic or thermoplastic domains dispersed in discrete form throughout the resin matrix, in order to increase the resistance to crack-growth initiation. This paper provides an overview of the current developments in the use of reinforcement materials and introduces the reader to early findings on the use of micro particles for toughness enhancement of adhesives. The theme of the use of materials of natural origin as reinforcement materials, giving special emphasis to the use of cork particles as toughener material is also presented.

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Effect of surface treatment in cork reinforced composites

Cited by 47 publications

References 20 publications

Cork–polymer biocomposites: Mechanical, structural and thermal properties

Cork–polymer biocomposites: Mechanical, structural and thermal properties

Moisture dependence of the properties of composites made from tung oil based polyurethane and wood flour

Methods to increase the toughness of structural adhesives with micro particles: an overview with focus on cork particles

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