Simulation Approach for Hydrophobicity Replication via Injection Molding

Baldi-Boleda, Tomás; Sadeghi, Ehsan; Colominas, Carles; García-Granada, A. A.

doi:10.3390/polym13132069

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…As for the height of the sample, the amplitude of one period oscillates between 0.1 and 0.15 µm. Similar structures were measured to obtain hydrophobicity [25]. Hydrophobic structures showed a period and amplitude of 20 µm and submicron periods that were responsible for hydrophobicity.…”

Section: Vertical Axis Measurementsmentioning

confidence: 79%

Femtosecond Laser Texturization on Coated Steel

2022

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Surface textures such as laser-induced periodic surface structures (LIPSS) are of great interest to obtain industrial nanopatterns. In this work, plain uncoated 1.2344 steel with and without Chromium Nitride (CrN) and CrN plus diamond-like carbon (DLC) coatings were used in experiments. The laser texturing variables studied were the laser speed (3000–4000 mm/s) and the distance between laser lines (1–10 microns). These structures were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM) to obtain an overview of the roughness and to analyze the heights of the obtained structures. A two-dimension fast Fourier transform (2D-FFT) of the SEM images and its characteristic frequencies was used to assess the periodicity of the textured surfaces and thus quantify the far-range order. The speed of laser depth ablation is related to the laser energy density for each coating and textures are qualified using the FFT approach.

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Section: Vertical Axis Measurementsmentioning

confidence: 79%

Femtosecond Laser Texturization on Coated Steel

2022

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“…However, the use of this polymer for the production of WPCs poses certain issues, as bioPP is a practically non-polar polymer due to the null difference in electronegativity between its bonds. This is a very characteristic behavior of polyolefins, which makes them hydrophobic [26]. On the other hand, lignocellulosic fillers are completely polar as a result of their oxygen-based functionalizations (mostly hydroxyl groups).…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Argan Shell Flour in a Biobased Polypropylene Matrix for the Development of High Environmentally Friendly Composites by Injection Molding

et al. 2023

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In this study, a new composite material is developed using a semi bio-based polypropylene (bioPP) and micronized argan shell (MAS) byproducts. To improve the interaction between the filler and the polymer matrix, a compatibilizer, PP-g-MA, is used. The samples are prepared using a co-rotating twin extruder followed by an injection molding process. The addition of the MAS filler improves the mechanical properties of the bioPP, as evidenced by an increase in tensile strength from 18.2 MPa to 20.8 MPa. The reinforcement is also observed in the thermomechanical properties, with an increased storage modulus. The thermal characterization and X-ray diffraction indicate that the addition of the filler leads to the formation of α structure crystals in the polymer matrix. However, the addition of a lignocellulosic filler also leads to an increased affinity for water. As a result, the water uptake of the composites increases, although it remains relatively low even after 14 weeks. The water contact angle is also reduced. The color of the composites changes to a color similar to wood. Overall, this study demonstrates the potential of using MAS byproducts to improve their mechanical properties. However, the increased affinity with water should be taken into account in potential applications.

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“…Furthermore, the equation governing the jetting behavior of the filling from the gate was discretized by a control volume-based, finite-volume method [ 22 ]. By using each of the commercialized software, including ANSYS Fluent [ 23 , 24 ], Moldflow [ 25 ], Open FOAM [ 26 ] and Moldex3D [ 10 , 27 , 28 , 29 , 30 ], one could analyze the multiple physical parameters of the output molding parts in relation to the operational parameters of the injection molding process. Notably, the experimental investigator could easily make a comparison between the simulation results and the real operational results in the laboratory.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study of the Flatness of a Plastic Injection Molded Pallet by a Newly Proposed Sequential Valve Gate System

Tsai

Liao

2022

Polymers

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The investigation of plastic pallet molding, assisted by a sequential valve gate system, has not yet been performed due to the limitations of the pallet scale. Furthermore, at present, the application of recycled plastics by chemical industries has become extremely popular around the world. This study aimed to determine pallet flatness experimentally and numerically using recycled polypropylene with a large-scale pallet. Short-shot testing on injection molding was performed to obtain short-shot samples for confirmation of the flow front during simulated filling. The real injected pallet profile, which was measured by an ATOS, was compared after confirmation to the numerical profile of the pallet. The pallet’s flatness was accurately compared to the real experimental and numerical results. By adjusting the temperature of the cooling channel within the cavity plate to 55 °C, the flatness of the pallet achieved by the newly proposed sequential valve gate-opening scheme was about 7 mm, which meets the height directional warpage standard determined by the pre-set sequential scheme. The numerical flatness is in line with existing flatness values for pallets. Furthermore, the proposed cooling temperature gives the highest yield in terms of pallet molding from the perspective of the stakeholders.

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Simulation Approach for Hydrophobicity Replication via Injection Molding

Cited by 6 publications

References 18 publications

Femtosecond Laser Texturization on Coated Steel

Femtosecond Laser Texturization on Coated Steel

Incorporation of Argan Shell Flour in a Biobased Polypropylene Matrix for the Development of High Environmentally Friendly Composites by Injection Molding

Feasibility Study of the Flatness of a Plastic Injection Molded Pallet by a Newly Proposed Sequential Valve Gate System

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