EFFECT OF UV LIGHT POLYMERIZATION ON THE POLYDIACETYLENE PHOSPHOLIPID NANOVESICLES STRUCTURE

Diacetylene lipids can undergo polymerization via a 1, 4-addition reaction upon UV light to form ene-yne alternating polymer chains, producing liposome -- like nanovesicles. The nanovesicles show a bichromic property from blue to red upon external stimuli, such as heat, pH, and mechanical stresses,...

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Bibliographic Details
Published in:Italian journal of food science 2011-01, Vol.23, p.118
Main Authors: Oliveira, C P, Soares, N F F, Teixeira, A V, Oliveira, T V, Almeida, G W R
Format: Article
Language:English
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Summary:Diacetylene lipids can undergo polymerization via a 1, 4-addition reaction upon UV light to form ene-yne alternating polymer chains, producing liposome -- like nanovesicles. The nanovesicles show a bichromic property from blue to red upon external stimuli, such as heat, pH, and mechanical stresses, providing a cheap and convenient sensor. The aim of this work was to investigate the effect of UV light polymerization on the size of PDA/phospholipid nanovesicles. The vesicles were polymerized by exposure to 254 nm UV light for 15 min. The structures were characterized using dynamic light scattering technique where all the intensity correlation functions of dilute solutions were fitted using cumulant analysis. Effects of the exchange of lipid molecules between different vesicles and membrane fluctuations may explain the anomalous behavior observed before polymerization. It is expected that both effects disappear after the polymerization which is coherent to the observed changing in the power law exponent.
ISSN:1120-1770
2239-5687