Miks Bleija / Materials & process engineer

PublicationsJournal articlesProblem / SolutionFull list: RTU ORTUS

2024

Dielectric, low-frequency noise and mechanical properties of hybrid carbon nanotubes/graphene nanoplatelets epoxy composites

Polymer Composites 46 (2025) 3153 / 10.1002/pc.29160

ProblemIn MWCNT/GNP hybrid epoxies it was unclear which filler controls the electromagnetic response and which controls the mechanical response.

SolutionPercolation at about 0.25 vol.% MWCNT, with electromagnetic properties nearly independent of GNP content. Shielding from 26 to 37 GHz, 1/f noise from resistance fluctuations, and a 40% increase in tensile modulus at 0.25/0.25 vol.%.

2024

Evaluation of thermal conductivity models and dielectric properties in metal oxide-filled poly(butylene succinate-co-adipate) composites

Scientific Reports 14 (2024) 13629 / 10.1038/s41598-024-64426-5

ProblemHeat dissipation in electronics needs polymers that conduct heat but not electricity, and metal oxide fillers in biodegradable matrices had little data.

SolutionTiO₂, NiFe₂O₄, Fe₂O₃ and Fe₃O₄ in PBSA at 4 to 50 vol.%. Light flash data at high loading fit the Bruggeman and Agari models, giving electrically insulating heat-dissipation composites.

2023

Poly(butylene succinate) hybrid multi-walled carbon nanotube/iron oxide nanocomposites: electromagnetic shielding and thermal properties

Polymers 15 (2023) 515 / 10.3390/polym15030515

ProblemAbsorption-dominated EMI shielding usually needs high carbon nanofiller loadings, which raise cost.

SolutionMWCNT capped at 0.6 vol.% with 8 to 12 vol.% Fe₃O₄ in PBS. Shielding effectiveness of 20 to 52 dB at 30 GHz, dominated by absorption, and terahertz transmittance reduced by up to six orders of magnitude.

2022

Comparison of carbon-nanoparticle-filled poly(butylene succinate-co-adipate) nanocomposites for electromagnetic applications

Nanomaterials 12 (2022) 3671 / 10.3390/nano12203671

ProblemAntistatic, electrostatic dissipative and EMI shielding plastics are made from fossil-based, non-degradable polymers.

SolutionFour carbon fillers in compostable PBSA at 1.1 to 30 vol.%. All exceed 10^-10 S/m volume conductivity, 30 vol.% MWCNT reaches 0.756 W/(m·K), and MWCNT, GNP and nanostructured carbon black above percolation suit microwave and THz shielding.

Dielectric, low-frequency noise and mechanical properties of hybrid carbon nanotubes/graphene nanoplatelets epoxy composites

Evaluation of thermal conductivity models and dielectric properties in metal oxide-filled poly(butylene succinate-co-adipate) composites

Poly(butylene succinate) hybrid multi-walled carbon nanotube/iron oxide nanocomposites: electromagnetic shielding and thermal properties

Comparison of carbon-nanoparticle-filled poly(butylene succinate-co-adipate) nanocomposites for electromagnetic applications

Miks Bleija

Positions

Contact