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Three polycarboxylate-based comb-like random terpolymers (PAE-Na) were designed and synthesized by emulsion polymerization. Their structures were confirmed by FT-IR, 1H NMR and GPC. Their surface activities, aggregation behaviors and dispersity properties in aqueous solution were investigated by surface tension measurements, dynamic light scattering (DLS) and transmission electron microscopy (TEM)...
Polymer brushes of different structure (full extension vs collapsed) and charge (+, 0 −) have been employed as supporting “smart” interface for investigating the recrystallization pathways of isolated SbpA bacterial surface proteins. Such study has been done by means of Quartz Crystal Microbalance with Dissipation monitoring (QCMD), which allowed following the real-time evolution of frequency (related...
A novel simulation approach is proposed for the representation and calculation of the specific surface area of crystalline nanoporous materials (e.g. MOFs). In brief, the simulation box that contains the framework atoms is discretized with voxels, which are filtered based on an atomistic forcefield according to specific criteria (i.e. whether a voxel can be occupied by a gas molecule or not). This...
An electric field-induced alignment characteristics of high structure carbon black (HSCB) nanoparticles in silicone oil base fluids with different viscosities were investigated in this work. Resistivity change versus time of HSCB/silicone oil fluids with different concentrations of HSCB filler and different silicone oil viscosities was determined at different electric field strengths. Measurement...
Microparticles composed of calcium phosphate (CaP) and chitosan covered with 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer were prepared in a single step by coaxial electrospraying. An aqueous solution containing calcium chloride, chitosan and an MPC polymer ethanol solution were electrosprayed from coaxial double needles into a phosphate solution. CaP/chitosan microparticles were successfully...
The primary objective of this study was to improve the wear resistance of titanium by depositing on its surface a HVOF (high velocity oxygen fuel) sprayed Al2O3-TiO2 coating subsequently remelted by electron beam (EB).The microstructure of the feedstock material, as-sprayed and EB remelted coatings was investigated by scanning electron microscopy (SEM) and X-Ray diffraction techniques (XRD). The effect...
Herein, the polyelectrolyte capsules containing spectral and fluorescent probes were formed using the layer-by-layer method based on the layerwise deposition of oppositely charged polyelectrolytes on the micelles of different ionic surfactants, cetyltrimethylammonium bromide and sodium dodecyl sulfate, with previously solubilized substrates. The branched polyethyleneimine was used as a cationic polyelectrolyte,...
We report on the results of an in vitro digestion study of silver nanoparticles in presence and absence of food. The particles were poly(acrylic acid) stabilized ultra-small silver nanoparticles with a radius of 3.1nm and a relative size distribution width of 0.2. As food components oil, starch, skimmed milk powder and a mixture thereof were chosen. Aggregation of the particles was quantified with...
Two kinds of independent temperature and pH dual-stimuli responsive poly(methacrylic acid)/poly(N-isopropylacrylamide) (PMAA/PNIPAM) microgels with pH sensitive PMAA cores and temperature responsive PNIPAM shells were prepared via distillation precipitation or emulsion precipitation copolymerization of N-isopropylacrylamide (NIPAM) and N, N′-methylenebisacrylamide (MBA) in the presence of the PMAA...
Hyperbranched polymers have been proposed as potential carriers or host compartments for controlled drug delivery. In this work the solubilization of alkylphenols into aggregates formed by hyperbranched polyglycidol HPG and its ester derivative has been studied. HPG17 was synthesized by ring-opening polymerization of glycidol, and then the ester HPG4-RBr13 has been obtained by reaction of hPG17 with...
Influence of the support nature on catalytic properties of the supported Pd nanoparticles in liquid-phase (water, ethanol) hydrogenation of maleic acid (MA) to succinic one was extensively studied. Different oxides (SiO2, diatomites, WO3, Ta2O5, Nb2O5, V2O5, TiO2, CeO2, ZrO2, Ga2O3, In2O3, Cr2O3, Fe2O3, Al2O3), salts (CaF2, BaSO4) and carbon supports either with extremely low or high porosity were...
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