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Lipid-Block Copolym...
Lipid-Block Copolymer-Immiscibility
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Bryskhe, Karin (författare)
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- Schillén, Karin (författare)
- Lund University,Lunds universitet,Fysikalisk kemi,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Physical Chemistry,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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Löfroth, Jan-Erik (författare)
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- Olsson, Ulf (författare)
- Lund University,Lunds universitet,Fysikalisk kemi,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Physical Chemistry,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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(creator_code:org_t)
- 2001
- 2001
- Engelska.
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Ingår i: Physical Chemistry Chemical Physics. - 1463-9084. ; 3, s. 1303-1309
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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 parts of the lecithin (lipid) and the block copolymer that explains their immiscibility
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
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