HU – Page 2 – TechConnect Briefs

Nanocomposites for Restorative Dentistry

Uveges A., Bukovinszki K., Szaloki M., Hegedus C., Borbely J., University of Debrecen, HU

Dental filling materials are crosslinked resins with high abrasion resistance. Inorganic micro and recently nanofillers are introduced to improve their properties. However, the shrinkage of the resin component during the polymerization reaction is still a [...]

Synthesis of Biocompatible Nanocomposite hydrogels as a Local Drug Delivery System

Bako J., Szepesi M., Borbely J., Borbely Z.M., Hegedus C., Borbely J., Borbely Z.M., University of Debrecen, HU

Hydrogels are three dimensional hydrophilic crosslinked polymer networks, which capable of swelling in water. They have soft and elastic nature, which suggests similarities to natural tissues. Hydrogels are important in dentistry. For example, PerioChip is [...]

Fluorescent Nanoparticles Based on Chitosan

Bodnar M., Minko T., Hartmann J.F., Borbely J., University of Debrecen, HU

Chitosan is a basic linear polysaccharide containing β-[1→4]-linked 2-acetamido-2-deoxy-D-glucopyranose and 2-amino-2-deoxy-D-glucopyranose units. Because of the presence of reactive amino groups, chitosan can be modified easily to create nano- and micro particulate systems, films or porous [...]

Synthesis of Nanoparticles by Crosslinking Copolymerization

Uveges A., Hartmann J.F., Borbely J., University of Debrecen, HU

Cross-linked polymers formed by free radical polymerization in homogeneous solution or in emulsion are used in many current and emerging applications, including dental materials, protective and decorative coatings, contact lenses, super absorbent materials and hydrogels [...]

Nanoparticles Prepared by Self-assembly of Chitosan and Poly-gamma-glutamic Acid

Bodnar M., Hajdu I., Filipcsei G., Hartmann J.F., Borbely J., University of Debrecen, HU

The technique of self-assembly of polyelectrolytes opens many new opportunities to achieve idea models as delivery system. The oppositely charged biopolymers can self-assemble by the attractive interaction between the functional groups. The electrostatic interactions between [...]

Morphology Studies And Potential Applications Of Poly(N,N-Dimethylacrylamide)-l-Polyisobutylene Amphiphilic Polymer Conetworks

Mezey P., Domján A., Iván B., Thomann R., Mülhaupt R., Chemical Research Center of the Hungarian Academy of Sciences, HU

Poly(N,N-dimethylacrylamide)-l-polyisobutylene (PDMAAm-l-PIB) amphiphilic conetworks were synthesized from two incompatible polymers, i.e. hydrophilic PDMAAm and strongly hydrophobic PIB in a wide range of composition (38-80 m/m % PIB). DSC and SAXS measurement results show that a [...]

Nanophase Separated Anionic Amphiphilic Model Polymer Conetworks Based on Methacrylic acid

Kali G., Georgiou T.K., Iván B., Patrickios C.S., Loizou E., Thomann Y., Tiller J., Hungaryan Academy of Sciences, HU

Two series of model amphiphilic polymer conetworks were synthesized by group transfer polymerization (GTP). The first one was composed of the hydrophobic methyl methacrylate (MMA) and the hydrophilic methacrylic acid (MAA), and the second one [...]

Nanoparticles Formed by Complexation of Poly-gamma-glutamic Acid with Lead Ions

Bodnar M., Kjoniksen A-L, Hartmann J.F., Daróczi L., Nystrom B., Borbely J., University of Debrecen, HU

Recently, reduction of water consumption by industry has been an important challenge. Enhanced ultrafiltration with polymers is a feasible method to remove metal ions from diluted wastewater streams. Biomacromolecules, biodegradable polymers as biomaterials have an [...]

Thermo-Mechanical Characterization and Integrity Checking of Packages and Movable-Structures

Szabo P., Perlaky G., Bognar Gy., Horvath Gy., Ress S., Poppe A., Rencz M., Courtois B., Budapest University of Technology and Economics, HU

The paper will present a variety of possibilities for the thermal characterization of different movable MEMS devices and packaging. It will discuss the major difficulties in these methodologies and the ways to overcome them. Comparison [...]

Design and Verification of an Electrostatic MEMS Simulator

Bognar G., Rencz M., Ciontu F., Charlot B., Courtois B., Micred, HU

Thermal solvers can be used for the simulation of electro-static problems as well, since the main equations to be solved are the same: the so-called field equation. There are numerous thermal solvers on the market, [...]