Materials & Design

All the resaerch data about this Manuscript.

Self-reinforced polymer composites (SPCs), also called “single polymer composites” or “all-polymer composites”, have attracted the attention of academia and industry because of the strong fiber/matrix adhesion, reduced weight, and enhanced recyclability. However, their mechanical properties are usually limited. The incorporation of nanoparticles to enhance the properties of SPCs has become an issue of concern. No study to date has investigated the incorporation of graphene into SPCs. The film stacking technology of SPCs and nanotechnology of graphene were combined to produce graphene-reinforced polypropylene (PP) SPCs with enhanced mechanical properties. The incorporation of a small number of graphene platelets (GNPs) to produce PP/GNPs SPCs has been presented. The small number of GNPs will not increase the cost a lot but can improve the processing as well as the mechanical performance of the final product. For PP/GNPs SPCs, the addition of only 0.062 wt% of GNPs resulted in an increase in the tensile strength and modulus of 117% and 116%, respectively, as compared with values of pure PP. Compared with PP SPCs without graphene, a 42% increase in the tensile strength was achieved. The improvement of mechanical properties of PP/GNPs SPCs is attributed to the high intrinsic mechanical properties of GNPs, the self-reinforced mechanism of PP SPCs, and the stronger interfacial adhesion between fibers due to the superior thermal conductivity of GNPs. The 116% increase in interfacial strength clearly proved the benefits of the incorporation of graphene in the preparation of SPCs.

This data is the natural frequency, power applied (joule heating) and estimated temperature of a bridge MEMS resonotar.

Fused filament fabrication (FFF) is a continuously growing additive manufacturing technology that aside from physical prototypes can also deliver functional prototypes and devices for radiofrequency (RF) and microwave applications. The very recent introduction of high-permittivity filaments for FFF has been one of the main facilitators for this major advancement, aiding microwave engineers to realise academics concepts that have thus far been impossible to fabricate and therefore invent new designs. However, the value to the RF community of these devices depends on accurate knowledge and repeatability of the electromagnetic properties of the materials being used which strongly relies on the processing strategy used during printing. This paper investigates the use of a high-permittivity filament and studies the impact of layer height and infill density on the relative permittivity (εr) and loss tangent (tanδ). A maximum relative permittivity of εr = 9.63 ± 0.16 and tanδ = 0.003 ± 0.0003 was achieved with a 200 μm layer thickness and 100% infill density. Finally, the results of this study are used in designing, simulating, 3D printing and measuring the performance of a novel graded-index dielectric lens operating at 10 GHz.

crystalline structure of AlN15 and MgN10. Any data for the study is available upon request.

Sample data: STL files with the 3D-CAD geometries of the specimens. CMB files considering the entirety of the evaluated FFF infill configurations and printing orientations. Experimental raw results of the samples tested in tensile, bending, and shear tests, for solid and sparse configurations in the different orientations. ASTM D638 - TENSILE TESTS RESULTS FOR SOLID CONFIGURATIONS ASTM D638 - TENSILE TESTS RESULTS FOR SPARSE CONFIGURATIONS ASTM D790 - FLEXURAL TESTS RESULTS FOR SOLID CONFIGURATIONS ASTM D790 - FLEXURAL TESTS RESULTS FOR SPARSE CONFIGURATIONS ASTM D5379 - SHEAR TESTS RESULTS FOR SOLID CONFIGURATIONS ASTM D5379 - SHEAR TESTS RESULTS FOR SPARSE CONFIGURATIONS SpecimenData.xlsx (File): List of representative specimens from every configuration. It includes all pre-process data required for the analysis of every sample. It includes one file for each representative specimen with test raw data. Each file is structured as follows: - 1st column data: Load (N) - 2nd column data: Crosshead displacement (mm) DIC post-process (Folder) It includes one file for each representative specimen with GOM post-process data. Each file is structured as follows: - 1st column data: Longitudinal DIC extensometer length increment (mm) - 2nd column data: Transverse DIC extensometer length increment (mm)

XRD ATR-FTIT and in vitro dissolution tests

This is a zip-file which consists of raw and processed data subdivided in several folders. The substructure is almost self-explanatory. The folders contain data from cross-sections, Electron Backscatter Diffraction, Glow Discharge spectroscopy, hardness measurement (surface hardness and nanoindentation), Light microscopy images, roughness measurements by Hommelmeter and white light interferometry, Scanning electron images and X-Ray Diffraction

The Cu particles (CuPs) can be clearly observed on the surface of BN flakes without aggregation. The CuPs are speculated to be mainly attached onto the defect sites and the active edges of BN covered with some functional groups such as hydroxyl groups and amino groups

The diffraction peaks at 2θ=26.764, 41.597, 43.873, 50.149, 55.164, 59.559, 71.41, 75.932, 82.174 correspond to h-BN platelets. It was seen that the rest peaks could be exactly indexed to the pure cubic phase of Cu (JCPDS PDF#04-0836). The reflection peaks appearing at 2θ=43.297, 50.433 and 74.13 are indexed as (111), (200) and (220) planes of Cu, respectively, indicating that the sphere particle consisted of Cu only.