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Electromagnetic scattering theory and effective medium approach are applied to calculate effective permittivity of composite media comprising of single-walled carbon nanotubes (SWCNTs) in broad frequency range from radiofrequency to ultraviolet. We demonstrate theoretically the dominant role of finite length effect in the far-infrared conductivity spectra of SWCNT material due to the strong slowing...
The length of fiber has strong effect on mechanical strength of fiber reinforced polymer nanocomposites. Previous work has shown that the length of multi-walled carbon nanotubes are reduced during melt mixing process with polyamide 6, 6. In this work, MWCNT/polycarbonate (PC) composites were prepared with four types of MWCNTs by injection molding. The severe melt mixing condition for dispersion of...
New polymer compositions having a conductivity of 5.6·10−10 – 7.5·10−2 S/cm and a high level of physical and mechanical properties had been obtained on the base of alicyclic polyimide with polyaniline and its titanium and tin nanocomposite oxides. The accelerating effect on the formation of polyimide by nano-composites of polyaniline with oxides of titanium and tin has been established. New data on...
Structural Health Monitoring is the automated process of damage detection and performance assessment aiming at providing reliable information regarding the integrity and the safety of a structure. Conventional measurement devices usually employed in structural health monitoring systems are affected by known drawbacks that limit their performance for health assessment, such as reduced durability against...
A substantial amount of work has been carried out in the area of dielectric nanocomposite materials. However, reported nanocomposite materials generally have disadvantages such as high dielectric loss mainly due to the nanoparticle agglomeration. Here, we present a novel nanocomposite material having polyvinylpyrrolidone (PVP) functionalized gold nanoparticles (5 nm in diameter) embedded inside a...
Scaffolds are salient materials used in tissue engineering. Nanocomposite scaffolds act as potential drug carriers in the treatment of a variety of cancer. 3D printing allows scaffolds to be contrived with custom design thus eliminating the risks of suitable pore size for bioactivity and custom designing. This paper projects the potentiality of producing 3D printed nanostructured scaffolds using graphene...
An example of a second-generation nanodielectric was developed. Incorporating 2 additives into Polyethylene (PE) aimed at generating multifuncionality. First, PE/nanosilica composites were prepared. The use of pre-treated nanosilica (5 wt%) was found to ease the particle dispersion into the matrix. Thin sandwiches of PE-nanosilica/Platinum(Pt)/PE-nanosilica were prepared by thermal pressing and used...
Polymers reinforced with nano- or micro-material(s) are increasingly being considered for the development of lightweight, conformable shielding materials against diagnostic X-rays. However, the choice of the optimal particle-size and the concentration for the filler material is not yet well studied in terms of their role in effective attenuation of the desired range of X-ray energies. In this study,...
Polymers which have different affinity with carbon nanotube (CNT) were infiltrated into carbon nanotube yarns (CNTYs) to improve mechanical and electrical properties. Those properties were highly related with the internal structure and the affinity of CNT-polymer. Polymer with the poorest affinity toward CNTs showed the greatest advancement in the mechanical and electrical properties of the CNTYs...
The complexity of intermolecular interactions and confinement in polymer - nanoparticle systems leads to spatial variations in structure and dynamics at both the meso- and nanoscale. Molecular simulation holds great promise as a means of predicting these effects and understanding their microscopic origin. In order to shed some light onto local structure and segmental dynamics of PS/SiO2 silica and...
The development of new antiviral nucleic acid-based drugs and the search for their efficient delivery into cells are an urgent task. We developed methods of immobilizing DNA fragments to titanium dioxide nanoparticles with the formation of TiO2∼DNA nanocomposites. It is shown that DNA fragments in nanocomposites retain their ability to form complementary complexes and can be delivered into cells without...
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