Mechanical and thermal conductivity properties of hemp fiber reinforced polyurethane composites

Sair, Said; Oushabi, A.; Kammouni, Abdelkhalek; Tanane, Omar; Abboud, Y.; Bouari, Abdeslam El

doi:10.1016/j.cscm.2018.02.001

Cited by 105 publications

(71 citation statements)

References 24 publications

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“…observed increases of up to 330% in thermal conductivity with the addition of 15 wt % of silver nanoparticles with 0.8 µm of size. Sair et al . studied the thermal conductivity properties of hemp fiber (HF) reinforced polyurethane composites and obtained increases of up to 33% in thermal conductivity with respect to pure PU using 30 wt % of HF loading.…”

Section: Resultsmentioning

confidence: 99%

“…[Color figure can be viewed at wileyonlinelibrary.com]the addition of 15 wt % of silver nanoparticles with 0.8 mm of size. Sair et al65 studied the thermal conductivity properties of hemp fiber (HF) reinforced polyurethane composites and obtained increases of up to 33% in thermal conductivity with respect to pure PU using 30 wt % of HF loading.Xia and co-works 66 demonstrated as well the synergistic effect between the natural fiber (kenaf) and h-BN in epoxy. This type of fiber is not conductive by itself, however the thermal conductivity of composite obtained from h-BN/kenaf fiber/epoxy with 43.6 wt % of h-BN was 72.3% higher than only kenaf/epoxy.…”

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confidence: 99%

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Enhanced thermal conductivity and mechanical properties of hybrid MoS₂/h‐BN polyurethane nanocomposites

Ribeiro

Trigueiro

Lopes

et al. 2018

J of Applied Polymer Sci

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Nanocomposites based on molybdenum disulfide (MoS2), hexagonal boron nitride (h‐BN) and hybrid MoS2/h‐BN nanofillers with different wt % in elastomeric polyurethane (PU) were studied with respect to their microstructure, thermal and mechanical properties. Tensile tests showed increases up to 80% in Young`s modulus for both h‐BN and hybrid MoS2/h‐BN composites. These results agree with dynamic mechanical analysis tests, which confirm an increase of up to 106% in storage modulus for hybrid MoS2/h‐BN with 0.5 wt % content. When the hybrid MoS2/h‐BN nanofillers were incorporated into the polymeric matrix, increases up to 102% in crosslink density were observed, indicating that strong interactions between the hybrid nanofillers and PU were established. However, the most important synergistic effect between the mixture of MoS2 and h‐BN nanoadditives was the increase of up to 752% in thermal conductivity with respect to neat polymer. Therefore, hybrid composites based in two‐dimensional MoS2/h‐BN nanofillers with multifunctional attributes can be applied in advanced polymeric materials that require high mechanical and thermal performance. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46560.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Enhanced thermal conductivity and mechanical properties of hybrid MoS₂/h‐BN polyurethane nanocomposites

Ribeiro

Trigueiro

Lopes

et al. 2018

J of Applied Polymer Sci

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“…Intermolecular bonds created between the graphene and PU segments prevent random and end‐chain scission of the PU molecular chains. Furthermore, the higher thermal conductivity of GrF than that of PU prevents heat localization within PU‐GrF composites, inhibiting PU chain degradation. GrF provides interconnected pathways that allow phonon transfer within the composites.…”

Section: Resultsmentioning

confidence: 99%

Multi‐scale damping of graphene foam‐based polyurethane composites synthesized by electrostatic spraying

et al. 2018

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An electrostatic spraying technique was used to synthesize 3D graphene foam (GrF)‐reinforced polyurethane (PU) composites. Glass transition temperature (Tg) of PU increased from 120 to 148 °C after 3.3 vol% GrF addition. Strong interfacial bonding accounts for the improvement in Tg of PU‐GrF composites. Energy dissipation behavior is probed at multiple load scales to examine the intrinsic and structural damping characteristic. Micro‐scale damping at 1 mN and 1,000 Hz exhibited loss tangent value (tan δ), which is 200% higher and 3 times faster than PU. Nano dynamic mechanical analysis of PU‐3.3 vol% GrF composite demonstrated up to 383% tan δ improvement than of PU at 5 μN dynamic load. Physical mechanisms including rippling effect and weak van der Waals forces in graphene account for the high energy dissipation of PU‐GrF composite. This study suggests that PU‐GrF nanocomposites have the potential to serve as a good damping material in vibrating systems. POLYM. COMPOS., 40:E1862–E1870, 2019. © 2018 Society of Plastics Engineers

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“…Bessadok et al [21] have shown that the use of solutions of styrene after the alkali treatment of fibres may be more adequate to increase the adhesion of the fibres in composite materials. Maafi et al [22] have studied the incorporation of alfa fibres in a polyurethane matrix, the results of this study showed an improvement in mechanical and thermal properties but when the reinforcement rate reaches 20% in weight the properties fall, this results have been observed for others fibres with the some matrix [3,23]. In this paper, potential uses of Stipa tenacissima L. fibers (Alfa fibres) in the field of thermal insulation are investigated.…”

Section: Introductionmentioning

confidence: 88%

“…Several researchers have studied thermal insulation materials from lignocellulosic fibers. Sair et al [2,3] developed a new low cost composite from hemp fiber and polyurethane matrix with a lower thermal conductivity, which was effective for insulating materials. With the same polymer matrix Oushabi et al [4] presented a low-density composite from date palm fiber, with a thermal conductivity similar to those of insulation material.…”

Section: Introductionmentioning

confidence: 99%

Alfa fiber-polyurethane composite as a thermal and acoustic insulation material for building applications

et al. 2019

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The aim of the present work pointed out the introduction of natural alkalised alpha fibres as reinforcement in the preparation of partially biodegradable green insulation material composite. Thermal conductivity, mechanical properties and acoustical performances of composites were investigated as a function of fibre content. We found that 10% of alkali solution improve the hydrophobic character, mechanical and interfacial properties of the fibers. Composites made of alfa fibers-polyurethane resin has exhibited good mechanical and acoustical properties. At 20% of reinforcement the Young modulus and tensile stress increased by 48.14% and 74.12%, respectively.

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Mechanical and thermal conductivity properties of hemp fiber reinforced polyurethane composites

Cited by 105 publications

References 24 publications

Enhanced thermal conductivity and mechanical properties of hybrid MoS₂/h‐BN polyurethane nanocomposites

Enhanced thermal conductivity and mechanical properties of hybrid MoS₂/h‐BN polyurethane nanocomposites

Multi‐scale damping of graphene foam‐based polyurethane composites synthesized by electrostatic spraying

Alfa fiber-polyurethane composite as a thermal and acoustic insulation material for building applications

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Mechanical and thermal conductivity properties of hemp fiber reinforced polyurethane composites

Cited by 105 publications

References 24 publications

Enhanced thermal conductivity and mechanical properties of hybrid MoS2/h‐BN polyurethane nanocomposites

Enhanced thermal conductivity and mechanical properties of hybrid MoS2/h‐BN polyurethane nanocomposites

Multi‐scale damping of graphene foam‐based polyurethane composites synthesized by electrostatic spraying

Alfa fiber-polyurethane composite as a thermal and acoustic insulation material for building applications

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Product

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Enhanced thermal conductivity and mechanical properties of hybrid MoS₂/h‐BN polyurethane nanocomposites

Enhanced thermal conductivity and mechanical properties of hybrid MoS₂/h‐BN polyurethane nanocomposites