This study encompasses the development of high-performance PC/ABS blends utilizing recycled PC (r-PC) and ABS (r-ABS) polymers from waste electric electronic equipment (WEEE) fractions heavily contaminated by flame retardants (FRs). Upgrading mechanical properties was facilitated addition virgin additives. In total three different WEEE -containing high concentrations bromine, chloride phosphorous were purified other than decontaminated halogenated contaminants dissolution-precipitation...

This paper presents the results of dielectric properties and partial discharge endurance measurements conducted on polypropylene (PP)-silica nanocomposite. The material compounds were analyzed with micro-Raman spectroscopy, X-ray tomography transmission electron microscopy (TEM). ac dc breakdown strength materials was measured. Dielectric response, capacitance loss factor film samples measured as a function temperature frequency. Partial (PD) reference PP Silica nanocomposite studied...

An electrically conductive polypyrrole (PPy) doped with a bioactive agent is an emerging functional biomaterial for tissue engineering. We therefore used chondroitin sulfate (CS)-doped PPy coating to modify initially insulating polylactide resulting in novel osteogenic scaffolds. In situ chemical oxidative polymerization was obtain on poly-96L/4D-lactide (PLA) nonwoven The coated scaffolds were characterized and their electrical conductivity evaluated hydrolysis. ability of the enhance...

High density polyethylene nanocomposites were prepared by melt mixing of varying type nanopowders in the presence vinyltrimethoxysilane (VTMS) coupling agent. Three spherical/irregular-shaped nanopowders, fumed Al2O3, γ-Al2O3, cubic titanium nitride (TiN) (1.5 vol-%), and high aspect ratio graphene oxide platelets (GO) (0.5 vol-%) investigated a molecular weight HDPE matrix. Significant differences dispersion quality between found TEM AFM. Degree crystallinity (DSC/XRD) was consistently...

Abstract High density polyethylene (HDPE) nanocomposites were prepared by melt mixing of the polymer with 0.5–1.0 wt-% hydrophobic surface treated fumed silica and titanium nitride (TiN) nanopowders, fiber-shaped halloysite nanotubes (HNT), graphene oxide (GO) nanoplatelets in presence trace amount organic peroxide. Surface treatments nanofillers vinyltrimethoxy silane (VTMS) accomplished boiling toluene solvents case silica, most feasibly ethanol solvent. Sliding friction wear characterized...

Superabsorbent polymers have shown potential for use in mortar and concrete as self-healing agents. The main drawback is, however, that these superabsorbent also absorb mixing water during the preparation casting of or concrete, leading to a loss workability. To avoid absorption water, were coated using fluid bed spraying process. barrier coating consisted three successive layers: polyvinylbutyral primer/wetting layer, cyclo-olefin copolymer layer sol-gel derived zirconium-silicon oxide an...

This paper presents the results of thermal, mechanical and dielectric measurements conducted on polymer nanocomposites consisting epoxy polyhedral oligomeric silsesquioxane (POSS). The material composites were analyzed with a scanning electron microscope (SEM), an atomic force (AFM) transmission (TEM). Glass transition temperatures measured differential calorimeter (DSC). Stress, strain, modulus impact strength tested. Ac lightning impulse (LI) breakdown measured. Relative permittivity, loss...

Baryte (BaSO4) is a critical raw material with no functional recycling since the used applications are dissipative. Significant quantities of baryte end up in tailings as side stream from mining industry. secondary source was filler plastics for low duty radiation shielding and an aggregate geopolymers needed safely storing low-radioactive waste ash. Mechanical strength remained at high level 0–50 % additions. Low-cost plastic composites additions showed promising attenuation X-rays...

Electroactivity of polypyrrole hyaluronic acid, electropolymerized in the presence oxidized carbon nanotubes (PPyHA-CNT) was studied situ by electrochemical atomic force microscopy (EC-AFM) physiological electrolyte solution. In Raman spectroscopic and quartz crystal microbalance (QCM) studies were conducted on layers polymer grown AT-cut 5 MHz crystals. Human adipose stem cell (ASC) attachment viability Live/Dead staining, proliferation evaluated WST-1 Cell assay for samples titanium....

ABSTRACT Nanodielectrics, a 21st‐century phenomena, is envisioned to be the answer for material challenges in progressive high‐voltage technology. It well known that proper dispersion of nanoparticles plays key role improving dielectric properties material, but understand where changes originate, it also essential reveal multiscale structure material. In this study, permittivity, breakdown strength, and nano calcium carbonate (nano‐CaCO 3 )/polypropylene composites with 1.8–8.1 wt % doping...

Surface properties and electrical charges are critical factors elucidating cell interactions on biomaterial surfaces. The surface potential distribution the nanoscopic microscopic elasticity of organic polypyrrole-hyaluronic acid (PPy-HA) were studied by atomic force microscopy (AFM) in a fluid environment order to explain observed enhancement attachment human adipose stem cells positively charged PPy-HA films. electrostatic between AFM tip surface, tip-sample adhesion force, elastic moduli...

This paper reports the effect of different process parameters on resolution direct laser writing by two-photon polymerization (2PP) with a low-cost Nd:YAG picosecond laser. Microstructures were fabricated from hybrid polymer–ceramic material Ormocomp® and impact varying beam focus position, average power scanning speed investigated in detail electron microscopy atomic force imaging. With appropriate settings, suspended structures could be fabricated. The intensity range so-called window...

Stabilized bioreceptor layers are of great importance in the design novel biosensors. In earlier work, chimeric avidins enabled immobilization biotinylated antibodies onto gold surfaces with greater stability compared to more conventional (wild-type avidin and streptavidin). present study, applicability as a general binding scaffold for on spin-coated functionalized polythiophene thin films has been studied by surface plasmon resonance atomic force microscopy. Novel showed remarkably...

Abstract Three‐dimensional, fibrous scaffolds can be easily fabricated from polylactide (PLA) using melt spinning and textile techniques. However, the surface properties of PLA are not ideal for tissue engineering purposes. Furthermore, electrically conducting required to deliver electrical stimulation cells. In this study, uniform, polypyrrole (PPy) coatings were on biodegradable fibers. Biopolymer dopants—hyaluronic acid (HA) chondroitin sulfate (CS)—were compared, a PPy/CS composition was...

The influence of filler loading polyaniline (PANI) and carbon black (CB) on the nonlinear electrical properties as well mechanical (tensile strength Young's modulus) ethylene propylene diene monomer (EPDM) was investigated. It has been found that low field conductivity most sensitive to addition in particular black. Threshold for nonlinearity onset also influenced but relationship between parameter values content less clear. For coefficient, tensile modulus there no observable relation...

Polypyrrole (PPy) has gained interest as an implant material due to its multifunctional properties and high compatibility with several cell tissue types. For the first time, biocompatibility osteointegration of PPy coating, incorporated chondroitin sulfate (CS), were studied in vivo by implanting PPy-coated bioabsorbable bone fixation composite screws poly-(lactide/glycolide) copolymer (PLGA) β-tricalcium phosphate (TCP) into New Zealand white rabbits. Uncoated polymer commercially available...

The scratch resistance of polymers is important for numerous applications, as scratching can lead to degradation surface properties and also represents an elementary process in abrasive wear. However, a complex involving several modes deformation, theoretical understanding it incomplete. Numerical modeling potentially useful means towards clearer picture the process, but central role tip-substrate contact highly localized large deformations makes finite element analysis (FEA) challenging....

Polystyrene (PS, 1), polycaprolactone homopolymers (PCL, 2) and 3-Iodo-2-propynyl n-butylcarbamate (IPBC, 3) were physically mixed in dichloromethane (DCM) processed into solid microspheres by using emulsion solvent evaporation method. Five different compositions with varying PS/PCL ratio tested. The phase morphology of the was studied Phase imaging atomic force microscopy (AFM) polished cross-sections. Scanning electron utilized to assess distribution IPBC polymer microspheres. separation...

Electrical measurements were conducted on different polymer compounds consisting of polypropylene (PP) and polyaniline. Both undoped polyaniline (PANI emeraldine base) doped PANI blended with PP studied. permittivity, loss factor breakdown voltages dc, ac lightning impulse (LI) the test films measured at laboratory Technical Research Centre Finland (VTT) high voltage Tampere University Technology. The real part permittivity (/spl epsi/') 1 wt-% 2.5 was approx. 13 % 21 higher than /spl epsi/'...

This paper presents the results of dielectric properties measurements conducted on Silica-Polypropylene (PP) nanocomposites. According to prior investigations by authors silica nanoparticles have improved performance material considering capacitor applications. Especially breakdown strengths with ac and dc voltages resistance against surface degradation increased. The relative permittivity losses also been comparable reference PP. In this composites 1-2 wt-% are compared Silica dispersion in...