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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Schillén, Karin
Lund University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (7/7 displayed)
- 2017Mixed micelles of oppositely charged poly(N-isopropylacrylamide) diblock copolymerscitations
- 2012Nanoparticles with a Bicontinuous Cubic Internal Structure Formed by Cationic and Non-ionic Surfactants and an Anionic Polyelectrolyte.citations
- 2006Supramolecular aggregates of amphiphilic gadolinium complexes as blood pool MRI/MRA contrast agents: Physicochemical characterizationcitations
- 2006Supramolecular aggregates of amphiphilic gadolinium complexes as blood pool MRI/MRA contrast agents: physicochemical characterization.citations
- 2002Influence of Ionic Surfactants on the Aggregation of Poly(Ethylene Oxide)−Poly(Propylene Oxide)−Poly(Ethylene Oxide) Block Copolymers Studied by Differential Scanning and Isothermal Titration Calorimetrycitations
- 2002Influence of ionic surfactants on the aggregation of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymers studied by differential scanning and isothermal titration calorimetrycitations
- 2001Lipid-Block Copolymer-Immiscibilitycitations
Places of action
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article
Lipid-Block Copolymer-Immiscibility
Abstract
We have investigated the binary system of a triblock copolymer of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO), EO5PO68EO5, in water. The ternary system with the same polymer, water and soybean phosphatidylcholine(lecithin) has also been studied. Small-angle X-ray scattering (SAXS), 2H NMR and differential scanning calorimetry (DSC) were used to characterize these systems. The phase diagram of the binary system is presented together with the characteristic parameters in the lamellar and hexagonal phases. In the ternary system, it was found that the lecithin and the block copolymer are essentially immiscible, forming separate phases. In a differential scanning calorimetry experiment it was found that the presence of the block copolymer did not affect the melting temperature of dipalmitoyl phosphatidyl choline. Again indicating immiscibility. The alkane hexadecane is a bad solvent for polypropylene oxide at room temperature. We conclude that it is the difference in hydrophobicity (or polarity) of the hydrophobic partsof the lecithin (lipid) and the blockcopolymer that explains their immiscibility.