A5058213028- Synthesis and properties of polymers
- Epoxy Resin Curing Processes
- Polymer Nanocomposites and Properties
- Silicone and Siloxane Chemistry
- Clay minerals and soil interactions
- Mesoporous Materials and Catalysis
- Carbon Nanotubes in Composites
- Layered Double Hydroxides Synthesis and Applications
- Conducting polymers and applications
- Injection Molding Process and Properties
- Hydrogels: synthesis, properties, applications
- Bone Tissue Engineering Materials
- biodegradable polymer synthesis and properties
- Therapeutic Uses of Natural Elements
- Fiber-reinforced polymer composites
- 3D Printing in Biomedical Research
- Nanotechnology research and applications
- Covalent Organic Framework Applications
- Nanoparticle-Based Drug Delivery
- Aerogels and thermal insulation
- Protein purification and stability
- Polymer Nanocomposite Synthesis and Irradiation
- Nanofabrication and Lithography Techniques
- Electrospun Nanofibers in Biomedical Applications
- Monoclonal and Polyclonal Antibodies Research
Universitatea Națională de Știință și Tehnologie Politehnica București
2014-2024
University of Bucharest
2007-2024
PRG S&Tech (South Korea)
2010
This work reports the development of a marine-derived polysaccharide formulation based on k-Carrageenan and sodium alginate in order to produce novel scaffold for engineering applications. The viscoelastic properties bicomponent inks were assessed via rheological tests prior 3D printing. Compositions with different weight ratios between two polymers, without any crosslinker, subjected printing first time, best our knowledge, fabrication parameters optimized ensure controlled architecture....
Three-dimensional (3D) printing technology was able to generate great attention because of its unique methodology and for major potential manufacture detailed customizable scaffolds in terms size, shape pore structure fields like medicine, pharmaceutics food. This study aims fabricate an ink entirely composed natural polymers, alginate, k-carrageenan carboxymethyl cellulose (AkCMC). Extrusion-based 3D used obtain based on a crosslinked interpenetrating polymer network from the k-carrageenan,...
A high number of studies support the use mesoporous silica nanoparticles (MSN) as carriers for drug delivery systems due to its biocompatibility both in vitro and vivo, large surface area, controlled pore size and, more than this, good excretion capacity from body. In this work we attempt establish optimal encapsulation parameters benzalkonium chloride (BZC) into MSN further study release. The influence different towards loading such pH, contact time temperature were considered. adsorption...
The aim of our work is to prepare mucoadhesive particles with biopolymers and 5-Aminosalicylic acid (5ASA) using the ionotropic gelation technique ensure a controlled drug release at colon level potential applications in treatment intestinal bowel disease (IBD). preparation through crosslinking Chitosan (CS) sodium tripolyphosphate (TPP) different mass ratios influence k-Carrageenan (kCG) layer were studied. UV–VIS spectrometry was employed assess encapsulation efficiency profile 5ASA....
The degree of intercalation the polyvinyl alcohol‐starch blend with layered silicate is increased if silicates untreated or intercalated ammonium ions that contain small radicals. If like NaMMT used, it possible to obtain exfoliated‐intercalated nanocomposites. materials based on PVOH, starch, and Nanocor I 28, 33, Cloisite 15 A can be PVOH starch reinforced 93 A, microcomposites result. study will continue analysis new morphologies considering transmission electron microscopy (TEM).
New polyether substituted benzoxazine monomers were synthesized starting from bisphenol A and p-Cresole as phenolic component various polyetheramines. The chemical structures proved by FTIR, 1H-NMR, 13C-NMR, 15N-NMR gel permeation chromatography (GPC). new benzoxazines mixed with classical based on benzylamine (BA-BZA) reinforced modified montmorillonite to give nanocomposites which characterized transmission electron microscopy (TEM). structure of the nanocomposite is exfoliated only when a...
Abstract The kinetic behavior of the urethane dimethacrylate (UDMA) copolymerized and reinforced by different concentrations polyhedral oligomeric silsesquioxane (POSS) with methacrylic groups was studied through Raman spectroscopy. UDMA‐POSS networks have been synthesized three types POSS, two monofunctional POSS (1‐propylmethacrylate)‐heptaisobutyl substituted (HISO‐POSS) heptacyclopentyl‐octasiloxan‐1‐yloxy) dimethylsilyl] propyl methacrylate (CPENTYL‐POSS) one octafunctional...
Abstract The aim of the work was to synthesize epoxy-based nanocomposites reinforced with multi-walled carbon nanotubes (MWNT). MWNTs were first functionalized in order increase dispersion degree within polymer matrix and thus ensure good adhesion between two components. functionalization process consists steps: first, MWNT oxidized, then an amidation reaction occurred various amines using carbondiimide succinimide as activators. Thus, new modified benzylamine (BA) nonylphenoxy...
Abstract Benzoxazine derivatives were synthesized using phenolated methyl oleate and either aniline, 1,6‐diaminohexane, or 4,4′‐diaminodiphenylmethane, respectively, as amine components. Polymerization of the benzoxazine led to formation hydrophobic dense coatings on Zn‐Mg‐Al alloy coated steel sheets for passive corrosion protection. The polybenzoxazine which are formed by crosslinking during a heat‐treatment step invoked substantial anodic shift open‐circuit potential well breakthrough in...
Abstract The synthesis of composite materials based on various carbon structures and polybenzoxazines (PBZs) gives products with noticeable thermal, electrical, mechanical properties. role different is emphasized in terms the main advantages both structure On other hand, PBZ features are significant considering high glass transition temperatures, low flammability, char yields, good thermal stability. This review article describes synthesis, structure, properties polybenzoxazine composites...
New nanocomposites were synthesized by the reaction between a polyhedral oligomeric silsesquioxane (POSS) with eight epoxy groups (epoxy-POSS) and diglycidyl ether of bisphenol A (DGEBA) using Jeffamine D230 as curing agent. The reactivity systems was extensively studied Raman spectroscopy. hybrid materials characterized different techniques like thermogravimetric analysis, dynamical mechanical X-ray photoelectron spectroscopy, differential scanning calorimetry, electron microscopy....
The research focuses on multiwalled carbon nanotubes (MWNTs) functionalization with aminoethyl aminopropyl polyhedral oligomeric silsesquioxane to increase their compatibility epoxy polymers and enhancement of interface adhesion. Functionalization MWNTs consisted a three-stage reaction by oxidation further amidation through acylation thionyl chloride. new nanomaterials were dispersed as reinforcing agent in weight ratio 0.3% related the matrix, which was cured an aromatic polyamine....
Two new polybenzoxazine products based on a reduced graphene oxide (rGO) were synthesized. The synthesis process started with an rGO amino functionalities. Benzoxazine structures synthesized oxazine rings attached to the surface of and fully characterized by FT-IR, 1H–NMR, XPS XRD. presence chains was pointed out 1H–NMR it correlated XRD data which show partial exfoliation layers. degree polymerization plays significant role against process. A higher yield ring-opening for benzoxazine leads...