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Showing 1 to 20 of 21 for “"PDMAEMA"”.
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Σχηματισμός νανοδομών μέσω ηλεκτροστατικής σύμπλεξης POEGMA-b-Q(PDMAEMA)-ελαϊκού νατρίου προς εγκλωβισμό κουρκουμίνης
… εστέρα της διμεθυλαμινοαιθανόλης) (POEGMA-b-Q(PDMAEMA)) συνδυάζεται με το ανιοντικό επιφανειοδραστικό ελαϊκό νάτριο. Διερευνώνται διάφορες αναλογίες βάρους του NaOL ως προς το συμπολυμερές. Μετά την εφαρμογή πρωτόκολλου του συν-διαλύτη, η κουρκουμίνη εισήχθη με επιτυχία στα παραγόμενα σωματίδια …
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Dual-Responsive Polymer and Hybrid Systems: Applications for Gene Delivery and Hydrogels
… poly((2-dimethylamino)ethyl methacrylate) (PDMAEMA). The dual-responsive behavior and polycationic character at physiological pH of PDMAEMA lead to outstanding properties and thus, to a versatile component for water-based applications. The main concept of the thesis was to combine the …
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Functional Nanostructures from well-defined Block Copolymers: Stimuli-responsive Membranes, Multicompartment Micelles, and Interpolyelectrolyte Complexes
… ock-poly(N,N-dimethylaminoethylmethacrylat) (PS-b-PDMAEMA) Diblockcopolymere synthetisiert. Konzentrierte Lösungen dieser Materialien wurden mittels einer Rakel in definierten Filmdicken auf Glasplatten aufgetragen. Nach dem Ausfällen der Polymerfilme in einem Wasserbad wurden schaltbare …
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Synthesis and Characterization of Nucleobase-Containing Polyelectrolytes for Gene Delivery
… A series of adenine- and thyminecontaining PDMAEMA and tert-butyl acrylate copolymers were synthesized to investigate the effect of incorporating hydrogen bonding groups into a polyelectrolyte. Incorporation of the styrenic nucleobases significantly affected the solubility of these …
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Polyelectrolyte Complexes and their Therapeutic Potential
… of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) homopolymers was synthesized. Star-shaped polymers with a different number of arms and molecular weights were created by using sugar-based or inorganic nanoparticles as core molecules with varying number of initiation sites. The …
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Star-shaped Polyelectrolytes
… poly(dimethylaminoethyl methacrylate) (PDMAEMA). It is a weak cationic polyelectrolyte and it can be easily transformed to a strong one by quantitative quaternization (with methyl iodide) leading to poly{[2-(methacryloyloxy)ethyl] trimethylammonium iodide}, PMETAI). In order to reach …
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Template-Directed Synthesis of One-Dimensional Hybrid Nanostructures from Cylindrical Polymer Brushes
… poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) shell and a hydrophilic POEGMA corona were used as 1D templates and nanoreactors for the fabrication of titania dioxide (TiO2) semiconductor nanotubes. The cationic PDMAEMA shell was loaded with a negatively charged titania precursor, …
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Nanocristaux de cellulose sensibles au CO2 et leurs applications
… le poly(2-(diméthylamino)éthyle méthacrylate) (PDMAEMA), sont utilisés comme polymères sensibles au CO2 dans cette thèse. Ces deux polymères présentent des différences de comportement en milieu aqueux. Ainsi, le PDEAEMA est un polymère hydrophobe à l'état neutre, mais il devient hydrophile …
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Self-Organized Nanostructures from Stimuli-Responsive Triblock Terpolymers
… methacrylate) (PB-b-PtBMA-b-PDMAEMA, BTD), which feature pH- and temperature-responsive properties. Using polymer-analogous modification reactions, such as ester hydrolysis of PtBMA to poly(methacrylic acid) (PMAA) or quaternization of PDMAEMA to PDMAEMAq, terpolymers with …
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Amphiphilic Diblock Copolymers: Study of Interpolyelectrolyte Complexation in Organic Media and Nanoencapsulation of Melatonin
… bromide) (PDMAEMAQ) and poly(acrylic acid) (PAA), and amphiphilic diblock copolymers based on polystyrene and the ionizable block poly(acrylic acid) were synthesized via Atom Transfer Radical Polymerization (ATRP). All polymers were characterized using 1H NMR …
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Smart hybrid materials with tailored functions
… poly((N,N-dimethylamino ethyl)methacrylat) (PDMAEMA) and poly(N-isopropylacrylamid) (PNIPAM) Bürsten wurden mittels "Atom transfer radical polymerization" (ATRP) synthetisiert; die Beladung mit AuNPs erfolgte durch einen Inkubationsprozess. Beide Polymere weisen eine untere kritische …
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New Approaches to the Synthesis of Porous and/or High Surface Area Transition Metal Oxides
… POM framework materials using amphiphilic PI-PDMAEMA block copolymers (A 3). The calcined mesoporous materials exhibit Keggin POM hexagonal pore structure with high keggin POM dispersion, improved surface area. These developed materials are expected to be useful in catalytic applications. A …
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"Smart" Hydrogels based on Trishydrophilic Triblock Terpolymers
… aminoethyl methacrylate) (P2VP-b-PEO-b-PDMAEMA) triblock terpolymers were synthesized, respectively, and characterized regarding their solubility and gelation behavior. At pH > 5, P2VP-b-PEO-b-PDMAEMA forms CSC micelles with a P2VP core, and a pH- as well as thermo-sensitive PDMAEMA …
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Zelluläre Aufnahme und intrazelluläres Schicksal von partikulären Drug Delivery Systemen
… von Polyplexen, bestehend aus den Polymeren pDMAEMA (Poly(2-dimethylamino)ethylmetacrylat) oder PEI (Polyethylenimin) und DNA, ergaben das folgende Bild: Der Mechanismus der Makropinozytose scheint für die Aufnahme beider Polyplexe in COS-7 Zellen keine Rolle zu spielen. Die Aufnahme von …
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Synthesis and Self-Assembly of Novel ABC Miktoarm Star Terpolymers
… or poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) as second block. The alkyne-midfunctional diblock copolymers were afterwards conjugated with azido-functional polystyrenes (PS), poly(ethylene oxide) (PEO), PtBMA and PDMAEMA to successfully obtain different novel ABC miktoarm star …
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Design, Synthesis and Application of Cylindrical Polymer Brushes: From Nanostructures to Advanced Materials
… and a poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) shell block was ruptured upon drying on solid surfaces, when suf-ficient Coulombic interactions between the shell block and the surface were formed. We controlled this scission behavior by tuning the surface interactions through switching …
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Influence of Electrostatic and Intermolecular Interactions on the Solution Behavior and Electrospinning of Functional Nanofibers
… polyelectrolytes described in the literature, PDMAEMA-based polyelectrolytes with polar anions (e.g. Cl-) experienced significant instabilities during electrospinning, requiring high concentrations and viscosities to stabilize the electrospinning jet. The use of large, more hydrophobic anions …
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Janus Particles at Interfaces
… silica core (˂˂ 100 nm) and a stimuli-responsive PDMAEMA hemicorona was developed. The synthesis is based on a modified version of the Pickering emulsion technique in combination with surface-initiated atom transfer radical polymerization (ATRP) in a “grafting from” approach. First, 30 nm silica …
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Functional Cylindrical Polymer Brushes and Their Hybrids with Inorganic Nanoparticles
… were obtained by further quaternization of the PDMAEMA brushes. Their responses to counterions of different valencies were investigated. The addition of a sufficient amount of mono-valent salt induced the collapse of these brushes. When di- and tri-valent counterions were added, helical …
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Self assembled transmembrane protein polymer conjugates for the generation of nano thin membranes and micro compartments
… poly((2-dimethylamino)ethyl methacrylate) (PDMAEMA) were conjugated to FhuA and the genetic variants via controlled radical polymerization (CRP) using grafting from technique. These polymers were chosen because they would provide stimuli handles in the resulting membranes. The reported …
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