Nanoparticle type effects on the scratch resistance of polyethylene-based nanocomposites

Alghamdi, Abdulaziz S.

doi:10.21833/ijaas.2017.04.001

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…%) were observed, with no large aggregates of nanoparticles. Further evidence of the good dispersion of CNT and CB nanoparticle was obtained by using the TEM, which showed the presence of CB and CNT in the polymer matrix (Alghamdi, 2017;2019). Fig.…”

Section: Nanoparticle Dispersionmentioning

confidence: 83%

Effects of dwell time and loading/unloading rate on the nanoindentation behavior of polyethylene-based nanocomposites

Alghamdi¹

2020

Int. j. adv. appl. sci.

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The purpose of this paper is to investigate the effects of parameters like loading, unloading rates, and dwell period on the depth-sensing indentation properties is. A bowing out or nose is the most common behavior for polymeric materials in nanoindentation tests due to the viscoelastic behavior. This leads to the negative slope and consequently, significant errors in the calculations of hardness and elastic modulus values using depth-sensing indentation techniques. A common practice to minimize this effect if to apply a creep at maximum indentation load or increase the unloading rates as considered in this work. The results showed that these parameters have significant impact on the nanoindentation hardness and elastic modulus. The hardness and elastic modulus increase with increasing the loading rate during nanoindentation testing. The elastic modulus values reduce significantly by increasing the unloading rate. Contrarily, hardness increase with increasing the unloading rate. Hardness and elastic modulus values are significantly affected by increasing the dwell period. The hardness reduces by 20% after increasing creep time and elastic modulus increases with increasing the dwell time.

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Section: Nanoparticle Dispersionmentioning

confidence: 83%

Effects of dwell time and loading/unloading rate on the nanoindentation behavior of polyethylene-based nanocomposites

Alghamdi¹

2020

Int. j. adv. appl. sci.

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“…It was found that the incorporation of various nanofillers can lead to a significant improvement in the polyethylene composite properties which can be used in many applications such as packaging, electrical and thermal energy storage, automotive, and biomedical [1][2][3][4][5][6]. Recently, new polyethylene nanocomposites have been developed with the use of various processing methods, different types, and amounts of reinforcements [7][8][9][10][11][12][13][14][15][16]. These nanocomposites can be a cost-effective alternative to the high cost advanced composites and can be widely used in various industrial applications [1].…”

Section: Introductionmentioning

confidence: 99%

Creep Resistance of Polyethylene-based Nanocomposites

Alghamdi

2019

Eng. Technol. Appl. Sci. Res.

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The purpose of this work is to investigate the effects of carbon black (CB), carbon nanotubes (CNTs) and nanoclay sheets addition on the creep behavior of polyethylene-based nanocomposites synthesized with an in-house processing method. A blend of 75 wt.% UHMWPE and 25 wt.% HDPE, abbreviated to U75H25, was used as the hybrid PE matrix to accommodate the nanofillers. A 0.5 wt.% of CB, CNTs or nanosheets clay was embedded separately into the blend matrix in order to improve the creep resistance. The scanning electron microscope (SEM) and transmission electron microscope showed that the nanofillers were homogeneously dispersed in the U75H25. The addition of just 0.5 wt.% nanoclay resulted in a significant increase in the creep resistance of the polyethylene blend. Conversely, the addition of CB or CNTs caused a reduction in the creep resistance. The embedding of CNTs into the matrix resulted in creep behavior almost close to the creep behavior of pure UHMWPE. The Burger’s model was employed to understand the effect of the nanoparticle addition on the creep mechanism.

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“…In recent years, researchers have focussed on the synthesis of new nanocomposites, starting from careful material selection and process control either by the direct use of an existing technique or by modified and adapted techniques. Various types of nanofillers have been used in polymer-based nanocomposite fabrication, such as exfoliated clay, modified carbon nanotubes and graphene [6][7][8][9][10][11][12][13][14][15]. However, achieving the uniform dispersion of the nanofillers is still an important scientific and technological challenge in nanocomposite fabrication.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Mechanical Characterization of High Density Polyethylene/Graphene Nanocomposites

Alghamdi

2018

Eng. Technol. Appl. Sci. Res.

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The purpose of this work is to investigate the effects of graphene nanosheets (GNSs) addition on the mechanical and thermal properties of high density polyethylene (HDPE). The HDPE/Graphene nanocomposites were synthesized using solution blending approach. HDPE was incorporated with graphene nanosheets in a solvent at various weights of fractions (0.1, 0.2, 0.4 and 0.5 wt%), and then the micro-hardness, elastic modulus, tensile strength, strain at break and thermal properties of the nanocomposites were measured and compared. The results showed that the use of Xylene solvent at high temperature combined with mechanical stirring can fully dissolve HDPE pellets. Scanning electron microscope (SEM) showed that GNSs were homogenously dispersed in the polyethylene matrix at low weights of fractions. The addition of just 0.2 wt% GNSs resulted in 100% increase in the micro-hardness value. The elastic modulus and tensile strength properties are proportionally increased with increasing GNSs content up to 0.4 wt%. However, at higher weight of fraction, a reduction in these properties is observed. The crystallinity and strain at break properties are reduced with the addition of GNSs.

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Nanoparticle type effects on the scratch resistance of polyethylene-based nanocomposites

Cited by 4 publications

References 34 publications

Effects of dwell time and loading/unloading rate on the nanoindentation behavior of polyethylene-based nanocomposites

Effects of dwell time and loading/unloading rate on the nanoindentation behavior of polyethylene-based nanocomposites

Creep Resistance of Polyethylene-based Nanocomposites

Synthesis and Mechanical Characterization of High Density Polyethylene/Graphene Nanocomposites

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