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Relevant bibliographies by topics / Polyoxazoline

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Academic literature on the topic 'Polyoxazoline'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 January 2023

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Journal articles on the topic "Polyoxazoline"

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England, R. M., J. I. Hare, P. D. Kemmitt, K. E. Treacher, M. J. Waring, S. T. Barry, C. Alexander, and M. Ashford. "Enhanced cytocompatibility and functional group content of poly(l-lysine) dendrimers by grafting with poly(oxazolines)." Polymer Chemistry 7, no. 28 (2016): 4609–17. http://dx.doi.org/10.1039/c6py00478d.

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We report the use of polyoxazolines as materials for modifying the surface of a generation 5 l-lysine dendrimer resulting in a significant improvement in the biocompatibility properties compared to the unmodified dendrimer. The polyoxazoline coatings represent interesting alternatives to polyethylene glycol and can also offer an opportunity for increasing drug loading.

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Sťahel, Pavel, Věra Mazánková, Klára Tomečková, Petra Matoušková, Antonín Brablec, Lubomír Prokeš, Jana Jurmanová, et al. "Atmospheric Pressure Plasma Polymerized Oxazoline-Based Thin Films—Antibacterial Properties and Cytocompatibility Performance." Polymers 11, no. 12 (December 12, 2019): 2069. http://dx.doi.org/10.3390/polym11122069.

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Polyoxazolines are a new promising class of polymers for biomedical applications. Antibiofouling polyoxazoline coatings can suppress bacterial colonization of medical devices, which can cause infections to patients. However, the creation of oxazoline-based films using conventional methods is difficult. This study presents a new way to produce plasma polymerized oxazoline-based films with antibiofouling properties and good biocompatibility. The films were created via plasma deposition from 2-methyl-2-oxazoline vapors in nitrogen atmospheric pressure dielectric barrier discharge. Diverse film properties were achieved by increasing the substrate temperature at the deposition. The physical and chemical properties of plasma polymerized polyoxazoline films were studied by SEM, EDX, FTIR, AFM, depth-sensing indentation technique, and surface energy measurement. After tuning of the deposition parameters, films with a capacity to resist bacterial biofilm formation were achieved. Deposited films also promote cell viability.

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Beck, M., P. Birnbrich, U. Eicken, H. Fischer, W. E. Fristad, B. Hase, and H. J. Krause. "Polyoxazoline auf fettchemischer Basis." Angewandte Makromolekulare Chemie 223, no. 1 (December 1994): 217–33. http://dx.doi.org/10.1002/apmc.1994.052230116.

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Mazánková, Věra, Pavel Sťahel, Petra Matoušková, Antonín Brablec, Jan Čech, Lubomír Prokeš, Vilma Buršíková, et al. "Atmospheric Pressure Plasma Polymerized 2-Ethyl-2-oxazoline Based Thin Films for Biomedical Purposes." Polymers 12, no. 11 (November 13, 2020): 2679. http://dx.doi.org/10.3390/polym12112679.

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Polyoxazoline thin coatings were deposited on glass substrates using atmospheric pressure plasma polymerization from 2-ethyl-2-oxazoline vapours. The plasma polymerization was performed in dielectric barrier discharge burning in nitrogen at atmospheric pressure. The thin films stable in aqueous environments were obtained at the deposition with increased substrate temperature, which was changed from 20 ∘C to 150 ∘C. The thin film deposited samples were highly active against both S. aureus and E. coli strains in general. The chemical composition of polyoxazoline films was studied by FTIR and XPS, the mechanical properties of films were studied by depth sensing indentation technique and by scratch tests. The film surface properties were studied by AFM and by surface energy measurement. After tuning the deposition parameters (i.e., monomer flow rate and substrate temperature), stable films, which resist bacterial biofilm formation and have cell-repellent properties, were achieved. Such antibiofouling polyoxazoline thin films can have many potential biomedical applications.

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Oudin, Amandine, Julie Chauvin, Laure Gibot, Marie-Pierre Rols, Stéphanie Balor, Dominique Goudounèche, Bruno Payré, et al. "Amphiphilic polymers based on polyoxazoline as relevant nanovectors for photodynamic therapy." Journal of Materials Chemistry B 7, no. 32 (2019): 4973–82. http://dx.doi.org/10.1039/c9tb00118b.

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Morgese, Giulia, and Edmondo M. Benetti. "Polyoxazoline biointerfaces by surface grafting." European Polymer Journal 88 (March 2017): 470–85. http://dx.doi.org/10.1016/j.eurpolymj.2016.11.003.

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Rayeroux, David, Christophe Travelet, Vincent Lapinte, Redouane Borsali, Jean-Jacques Robin, and Cécile Bouilhac. "Tunable amphiphilic graft copolymers bearing fatty chains and polyoxazoline: synthesis and self-assembly behavior in solution." Polymer Chemistry 8, no. 29 (2017): 4246–63. http://dx.doi.org/10.1039/c7py00632b.

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Ramiasa, M. N., A. A. Cavallaro, A. Mierczynska, S. N. Christo, J. M. Gleadle, J. D. Hayball, and K. Vasilev. "Plasma polymerised polyoxazoline thin films for biomedical applications." Chemical Communications 51, no. 20 (2015): 4279–82. http://dx.doi.org/10.1039/c5cc00260e.

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We report novel solvent-free and substrate independent, plasma polymerised nanoscale biocompatible polyoxazoline coatings capable of controlling protein and cell adhesion, and significantly reducing biofilm build up.

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CHUJO, Yoshiki, Eiji IHARA, and Takeo SAEGUSA. "Synthesis of Polyoxazoline-Polysiloxane Block Copolymers." KOBUNSHI RONBUNSHU 49, no. 11 (1992): 943–46. http://dx.doi.org/10.1295/koron.49.943.

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Legros, Camille, Marie-Claire De Pauw-Gillet, Kam Chiu Tam, Daniel Taton, and Sébastien Lecommandoux. "Crystallisation-driven self-assembly of poly(2-isopropyl-2-oxazoline)-block-poly(2-methyl-2-oxazoline) above the LCST." Soft Matter 11, no. 17 (2015): 3354–59. http://dx.doi.org/10.1039/c5sm00313j.

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Dissertations / Theses on the topic "Polyoxazoline"

1

Meyer, Matthias. "PIPOX-PEP kontrollierte Synthese und Aggregationsverhalten von Blockcopolymeren mit schaltbarer Hydrophilie /." Phd thesis, [S.l.] : [s.n.], 2006. http://opus.kobv.de/ubp/volltexte/2006/1083.

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Tomečková, Klára. "Depozice a charakterizace polymerních vrstev připravených na bázi 2-methyl-2-oxazolinu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-414133.

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Polyoxazolines are class of polymers which are suitable for medical applications because they have many interesting properties. These polymers are characterized by antibacterial properties so they can stop bacterial colonization of medical devices and significantly reduce the risk of infection. Furthermore, polyoxazolines are interesting for good biocompatibility. Basic topic of this diploma work is preparation of oxazoline-based thin films by plasma polymerization. Thin films were prepared by plasma polymerization from 2-methyl-2-oxazoline vapors in a nitrogen atmosphere in a dielectric barrier discharge. During the deposition was increased the substrate temperature. Polyoxazoline films were analyzed by several diagnostic methods. Physical and chemical properties of thin films were studied by SEM, AFM, FTIR by measuring contact angles and nanoindentation method. The films were found to be homogeneous, hydrophilic and have a higher nitrogen content. Furthermore, films showed viscoelastic properties. Polyoxazoline films were subjected to antibacterial and biocompatibility tests and the result showed, that films have antibacterial properties and support of viability cells viability.

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Tang, Pei. "Polyoxazoline derivatives for the design of polymer brushes and hydrogels." Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/36700.

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Hydrophilic POx have very similar behaviour with PEG owing to its peptdomimetic structure, however, POx shows higher chemical stability than PEG and can be further functionalised via substitute R in the side chains or at the end of the chain. In addition, PEtOx has been approved as an indirect food additive by FDA which may indicate the possibility of good immunogenicity of POx-based materials. Synthetic surfaces with reproducibility and biocompatibility for in vitro cell culture offer lots of advantages on adherent cells. A variety of synthetic polymers as well as properties like mechanical and chemical robustness resulting polymer brushes prior to other surface modification methods. Synthetic hydrogels can be further modified and allow a variety of mechanical and biochemical properties that determine the cell phenotype which makes it a good candidate for biomedical applications. Our work has focused on the design of polyoxazolines with controlled end chains for the design of such hydrogels and polymer brushes. In the second chapter, we review the synthesis of defined polyoxazoline and its applications, synthesis of non-fouling surfaces, fabricated hydrogels and characterisations. In the third chapter, we explore the design of poly(2-oxazolines) with controlled end chains and characterise the structure and control of initiation and termination steps. A range of initiators (bromide, iodide as well as tosylates) and termination agents were used to introduce functionalisable or polymerisable end groups on poly(2-oxazolines). Microwave assisted synthesis was used for polyoxazoline synthesis. Polyoxazolines can be simply synthesized in relatively mild conditions using this approach. The structure of the resulting polymers is characterised by NMR, MALDI-ToF and FTIR. In the third chapter, we explore the use of polymerisable polyoxazolines for the design of grafted from polymer brushes. The growth of poly(oxazoline) brushes was studied first and the resulting polymer brushes characterised. We then explored the functionalization of polymer brushes using thiol-ene chemistry and their protein resistance for cell and protein patterning. Hence, we explored the design of polyoxazoline nonfouling coatings. These surfaces allow the control of surface properties such as protein adsorption and bio-functionalization. In the fourth chapter, we designed a series of thiolated poly(oxazolines) to be used for the design of hydrogels crosslinked via thiol-ene chemistry. We fully characterised the thiolated polymers designed and studied the formation of hydrogels using an alkene-functionalised polyoxazoline and a range of thiolated crosslinkers with polyethylene glycol and poly(oxazoline) backbones. Synthetic hydrogels have attracted much attention recently for in vitro cell culture as they allow the control of the properties of soft biomaterials (mechanics, cell adhesion, degradation). Importantly, the gelation conditions used for 3D cell encapsulation are essential as they allow controlling the mechanics and stability of the gel, whilst curing in mild, non-toxic conditions. Properties such as hydrogel chemistry, macroscopic and nanoscale mechanical properties and degradation have indeed been shown to strongly affect cell phenotype and the use of these materials for tissue engineering. To study gelation in situ, photo-rheology was used to characterise the properties and kinetics of the resulting hydrogels. Here, we investigated the formation of hydrogels with different multi-arm PEG thiols. This allowed us to improve the properties of hydrogel even at low weight concentration of materials where gelation is particularly challenging.

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Giardi, Chloé. "Synthèse de surfactifs à base de polyoxazoline : propriétés physicochimiques et formulation." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2011. http://www.theses.fr/2011ENCM0008/document.

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Nous décrivons dans ce manuscrit la synthèse et l'étude de surfactifs à base de poly(2-méthyl-2-oxazoline) et de corps gras. Pour cela, deux voies de synthèse ont été réalisées. La première qui consiste à amorcer la polymérisation avec un alcool gras tosylé. La deuxième voie de synthèse a été réalisée en amorçant la polymérisation par un alcane iodé. Les surfactifs ainsi obtenus ont une chaîne grasse saturée ayant douze ou dix-huit atomes de carbone et des longueurs de chaînes polymères variables.Ces surfactifs sont examinés afin d'évaluer leur aptitude à la formulation. Ainsi, la valeur de leur concentration micellaire critique a été déterminée par tensiométrie et spectrofluorimétrie. Ensuite, l'évaluation de leurs pouvoirs mouillant et moussant, de leur HLB, de leur température de point de trouble… ont été déterminés afin de les comparer avec leurs homologues POE, les Brij®. Dans l'optique d'une application à la formulation, des tests d'évaluation de leur toxicité ont également été réalisés. Enfin, des préparations cosmétiques ont été formulées, à base de ces surfactifs et des Brij®. Parallèlement, une étude a été menée démontrant l'intérêt du carbonate de glycérol tosylé comme amorceur de la polymérisation de la 2-méthyl-2-oxazoline. Cet amorceur a permis de fonctionnaliser les polyoxazolines en extrémité de chaîne par des fonctions terminales (hydroxy)uréthane
In this manuscript, we describe the synthesis and the study of surfactants based on poly(2-methyl-2-oxazoline) and vegetable oil derivatives. Two ways for the synthesis are realized. The first path consists to initiate the polymerization with a tosylate fatty alcohol. The second synthetic route was realized by initiating the polymerization by an iodoalkane. The obtained surfactants have au saturated fatty chain with twelve or eighteen carbon atoms and various lengths of polymeric chain. This surfactants are reviewed to assess their suitability for the formulation. Thus, the value of their critical micelle concentration was determined by tensiometry and spectrofluorimetry. After, the evaluation of their wetting and foaming powers, their HLB, their cloud point temperature… was determinded in order to compare with their homologous POE, the Brij®. In the context of an application in the formulation, evaluation tests of toxicity were also made. Next, cosmetic preparations were realized, based on this surfactants and Brij®. In parallel, a study was conducted to demonstrate the tosylate gycerol carbonate interest as initiator in the 2-methyl-2-oxazoline polymerization. This initiator enable to fonctionalize the polyoxazoline in the chain end with (hydroxy)uréthane terminal function

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Korchia, Laetitia. "Auto-assemblage de copolymères amphiphiles photo-stimulables à base de polyoxazoline." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2016. http://www.theses.fr/2016ENCM0005/document.

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Trois architectures de copolymères (dibloc, tribloc et hétérogreffé) amphiphiles photo-stimulables à base de polyoxazoline et de groupements photo-sensibles de type coumarine sont étudiées dans ce travail. Ces copolymères s’auto-assemblent en milieu aqueux sous forme de nanoparticules de morphologies sphériques, ovales mais également de nanofibres hélicoïdales de plusieurs micromètres de longueur. Selon les cas, les morphologies sont induites par de la cristallisation des motifs coumarine entre eux ou bien des interactions polyoxazoline-coumarine. Par ailleurs, la photo-réponse des nanoparticules a été examinée après irradiation UV des groupements coumarine, capables de dimériser de manière réversible selon la longueur d’onde utilisée. Elle diffère selon l’architecture du copolymère qui constitue les nanoparticules et donne lieu à des phénomènes de (pré-)photo-dimérisation ou photo-réticulation du cœur de celles-ci avec des réversibilités sous UV variables et un maximum d'efficacité dans le cas des copolymères triblocs. La stabilité de ces auto-assemblages a également été examinée avant et après exposition UV. Dans tous les cas, l’irradiation des nanoparticules améliore leur stabilité en température et dans le temps avec un effet maximal dans le cas de la pré-photodimérisation (tribloc). Enfin, la réticulation et la cristallisation se sont révélées être des freins au piégeage de molécules hydrophobes, illustrées ici avec le Nile Red, alors que les copolymères diblocs se sont révélés être les systèmes les plus efficaces. En somme, les nanoparticules de copolymères triblocs présentent le meilleur compromis entre stabilité, efficacité UV et piégeage
Three photo-responsive amphiphilic copolymer architectures (diblock, triblock and heterografted) based on polyoxazoline and coumarin photo-sensitive units are studied in this work. These copolymers self-assemble in water into spherical or ovalic nanoparticles and also supramicrometer helicoidal nanofibers. Depending on the macromolecular architectures, these morphologies are induced by crystallization of coumarin units or polyoxazoline-coumarin interactions. Moreover, the nanoparticle photo-response is examinated after the UV-exposure of coumarin units, that are able to reversibly dimerize according to the wavelength used. This photo-response varies with the copolymer structure and leads to (previous) photo-dimerization or photo-crosslinking phenomena. These latters present various photo-reversibility behaviors under UV and a maximal efficiency for triblock copolymers. The nanoparticle stability was additionally studied before and after UV-irradiation. In both cases, the nanoparticle stability is improved towards time and temperature with a maximal impact for the previous photo-dimerization (triblock). Finally, the crosslinking and the crystallization appear as brakes for the hydrophobic molecule entrapment, illustrated here by Nile Red, whereas diblock copolymers seem to be the most efficient systems. To conclude, previously photo-dimerized nanoparticles (triblock) are the best way combining stability, UV-efficiency and entrapment

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Förtig, Anton. "Monomolekulare Lipopolymerschichten zum Aufbau von biomimetischen Lipidmembranmodellen." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974170828.

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Cesana, Sonia. "Functionalization of poly(2-oxazoline)s with cyclic RGD peptides." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974209643.

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Bissadi, Golnaz [Verfasser], Ralf [Akademischer Betreuer] Weberskirch, and Jörg C. [Gutachter] Tiller. "Polyoxazoline-silica hybrid nanoparticles / Golnaz Bissadi ; Gutachter: Jörg C. Tiller ; Betreuer: Ralf Weberskirch." Dortmund : Universitätsbibliothek Dortmund, 2016. http://d-nb.info/1126725013/34.

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Simon, Laurianne. "Conception de nanoformulations innovantes à base de polyoxazoline pour la délivrance cutanée d'antioxydants." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTS045.

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La peau, principale barrière protectrice avec l’extérieur, est de plus en plus agressée par des sources environnementales (UV, pollution, tabac…). Ces agressions génèrent une surproduction de radicaux libres conduisant à terme au vieillissement prématuré de la peau et parfois à l’apparition de cancers cutanés. Afin de neutraliser ces radicaux présents en excès dans l’épiderme, nous avons élaboré des nanoformulations à base de polyoxazolines pour la délivrance topique d’antioxydants tels que la quercétine. Ces polyoxazolines amphiphiles sont une alternative intéressante au poly(éthylène glycol) dont l’utilisation accrue induit des problèmes de santé chez l’homme. Plusieurs architectures macromoléculaires de polyoxazolines ont été synthétisées et deux nanoformulations innovantes : micelles mixtes et nanocapsules lipidiques ont été mises au point. Ces formulations présentent une grande stabilité, un bon taux de chargement et maintiennent l’activité antioxydante de la quercétine encapsulée. La pénétration cutanée des polyoxazolines seuls et formulés a été étudiée sur plusieurs modèles de peau (GUV, modèle non biologique, oreille de souris, explant de peau humaine). Il a été montré que les nanoformulations sont capables de modifier les propriétés physico-chimiques de surface du modèle de peau non biologique, favorisant leur étalement et que les polymères peuvent pénétrer dans les couches lipidiques de modèles de membranes simples à plus complexes et in vivo sur oreille de souris. En conclusion, les polyoxazolines peuvent substituer le poly(éthylène glycol) dans les formulations et permettre la délivrance topique d’antioxydants dans l’épiderme de souris, ouvrant ainsi la voie vers des applications cutanées pour traiter des pathologies comme le psoriasis ou les mélanomes
The human skin, considered as the main barrier from the outside, is more and more assaulted by environmental sources (UV, pollutants, tobacco…). These aggressions over generate free radicals within the skin then leading to skin aging and potentially skin cancer. Therefore, nanoformulations based on polyoxazolines for topical delivery of antioxidants were investigated in order to quench the excess of free radicals located in the epidermis. As a side objective, this research project intends to demonstrate the potential of amphiphilic polyoxazolines in formulation as an alternative to poly(ethylene glycol), which overuse has led to clinical awareness. Various macromolecular architectures of polyoxazolines were synthesized and two main nanoformulations were elaborated: mixed micelles and lipid nanocapsules. These last showed a high stability overtime, a good drug loading and maintained the antioxidant activity of the encapsulated quercetin. The skin penetration study of polyoxazolines and polyoxazolines based formulations was conducted on various skin models (GUV, nonbiological skin model, mice ears, human skin explants). Nanoformulations were able to modify physicochemical skin surface properties to enhance their spreading and polyoxazolines penetrated from simple to complex lipids membranes and in vivo in mice skin. As a conclusion, polyoxazolines were proved to be an excellent alternative to poly(ethylene glycol) overuse for designing formulations and show promise for delivering topically antioxidants into epidermis creating new possibilities for skin treatment such as psoriasis or melanomas

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Wiedmann, Steffen [Verfasser], and Rolf [Akademischer Betreuer] Mülhaupt. "Polyoxazoline als thermoresponsive polymere ionische Flüssigkeiten für programmierbare molekulare Transporter und schaltbare Dispergatoren." Freiburg : Universität, 2020. http://d-nb.info/1214592880/34.

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