Please use this identifier to cite or link to this item:
|Title:||Complexation of cationic polyelectrolyte with anionic phospholipid vesicles: Concentration, molecular weight and salt effects|
|Citation:||Chieng, Y.Y., Chen, S.B. (2011-02-01). Complexation of cationic polyelectrolyte with anionic phospholipid vesicles: Concentration, molecular weight and salt effects. Journal of Colloid and Interface Science 354 (1) : 226-233. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jcis.2010.10.045|
|Abstract:||The influence of cationic poly(diallyldimethylammonium chloride) on the morphology and phase behavior of anionic phospholipid vesicles was investigated using differential scanning calorimetry, fluorescent microscopy and light scattering technique. A wide range of polymer concentration has been examined for the first time. The polycation can bind electrostatically to the vesicles to compensate, neutralize and reverse the vesicular charge, depending on the molar ratio of cationic to anionic group R. For R< 1, charge compensation weakened the electrostatic repulsion between the lipid molecules, leading to formation of polymer-modified vesicles, each with an increased number of bilayers. The bilayer exhibits a rising main phase transition temperature from a gel to liquid crystalline state. This behavior persisted until R≈ 1 around the neutralization condition, where the complexes became largest and precipitate. With R> 1, charge reversal took place, the complex size reduced. Interestingly, the main phase transition temperature was found for the first time to shift back towards the original value in the absence of polymer for large enough R. Although the thermal behavior was nearly independent of the polymer molecular weight, the complex morphology could be different. © 2010 Elsevier Inc.|
|Source Title:||Journal of Colloid and Interface Science|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 22, 2019
WEB OF SCIENCETM
checked on Feb 5, 2019
checked on Feb 9, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.