Mechanical properties of eggshells powder reinforced recycled high-density polyethylene

Abstract This study investigated the effect of thermal treated eggshells powder on the mechanical properties of recycled high-density polyethylene (r-HDPE) composite. Thermal treated eggshellspowder, which was labelled as carbonised eggshells powder (CESP), was prepared at a low pyrolysis temperature of 400°C for one hour. The mechanical performance of the polymer composite reinforced with CESP was compared with the untreated dried raw eggshells powder (ESP) reinforced polymer composite. Each composite sample was prepared with a weight ratio of r-HDPE/filler varied at 90/10, 80/20, and 70/30. The polymer composite was prepared through a melt blending method in an internal mixture at 175° at 32 RPM mixing rate. The composite samples were tested flexural analysis, while structure and morphology were characterised using Fourier Infrared Transformer (FTIR) and Scanning Electron Microscope (SEM). Based on the finding, the interfacial adhesion of the composite between filler and matrix has improved with ESP and CESP, respectively. The composite with CESP filler at 70/30 shows the optimum flexural strength and modulus of 32.21 MPa and 2.06 GPa, respectively. Overall, the introduction of CESP offers a better performance in improving the mechanical properties of the composite as compared to ESP.

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Leather Waste to Enhance Mechanical Performance of High-Density Polyethylene

Polymers ◽

10.3390/polym12092016 ◽

2020 ◽

Vol 12 (9) ◽

pp. 2016 ◽

Cited By ~ 1

Author(s):

Eylem Kiliç ◽

Quim Tarrés ◽

Marc Delgado-Aguilar ◽

Xavier Espinach ◽

Pere Fullana-i-Palmer ◽

...

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

High Density Polyethylene ◽

Mechanical Performance ◽

Low Cost ◽

Impact Resistance ◽

High Density ◽

Polyethylene Matrix ◽

The Matrix ◽

High Impact Strength

Leather buffing dust (BF) is a waste from tannery which is usually disposed on landfills. The interest in using wastes as fillers or reinforcements for composites has raised recently due to environmental concerns. This study investigates the potential use of BF waste as filler for a high density polyethylene matrix (HDPE). A series of HDPE-BF composites, containing filler concentrations ranging from 20 to 50wt%, were formulated, injection molded and tested. The effect of filler contents on the mechanical properties of the composites were evaluated and discussed. Composites with BF contents up to 30wt% improved the tensile strength and Young’s modulus of the matrix, achieving similar mechanical properties to polypropylene (PP). In the case of flexural strength, it was found to be proportionally enhanced by increasing reinforcement content, maintaining high impact strength. These composites present great opportunities for PP application areas that require higher impact resistance. The materials were submitted to a series of closed-loop recycling cycles in order to assess their recyclability, being able to maintain better tensile strength than virgin HDPE after 5 cycles. The study develops new low-cost and sustainable composites by using a waste as composite filler.

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Structure and Mechanical Properties of High-Density Polyethylene Composites Reinforced with Glassy Carbon

Materials ◽

10.3390/ma14144024 ◽

2021 ◽

Vol 14 (14) ◽

pp. 4024

Author(s):

Piotr Olesik ◽

Marcin Godzierz ◽

Mateusz Kozioł ◽

Jakub Jała ◽

Urszula Szeluga ◽

...

Keyword(s):

Mechanical Properties ◽

Residual Stress ◽

Glassy Carbon ◽

High Density Polyethylene ◽

Mechanical Performance ◽

High Density ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

Carbon Fillers ◽

Composite Samples

In this paper, we investigated theimpact of glassy carbon (GC) reinforcement oncrystal structure and the mechanical performance of high-density polyethylene (HDPE). We made composite samples by mixing HDPE granules with powder in ethanol followed bymelt mixing in a laboratory extruder. Along with the investigated composite, we also prepared samples with carbon nanotubes (CNT), graphene (GNP) and graphite (Gr) to compare GC impact with already used carbon fillers. To evaluate crystal structure and crystallinity, we used X-ray diffraction (XRD) and differential scanning calorimetry (DSC). We supported the XRD results with a residual stress analysis (RSA) according to the EN15305 standard. Analysis showed that reinforcing with GC leads to significant crystallite size reduction and low residual stress values. We evaluated the mechanical properties of composites with hardness and tensile testing. The addition of glassy carbon results inincreased mechanical strength incomposites with CNT and GNP.

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