Please use this identifier to cite or link to this item:
|Title:||Interaction between poly(acrylic acid) and phospholipid vesicles: Effect of ph, concentration, and molecular weight||Authors:||Chieng, Y.Y.
|Issue Date:||15-Apr-2010||Citation:||Chieng, Y.Y., Chen, S.B. (2010-04-15). Interaction between poly(acrylic acid) and phospholipid vesicles: Effect of ph, concentration, and molecular weight. Journal of Physical Chemistry B 114 (14) : 4828-4835. ScholarBank@NUS Repository. https://doi.org/10.1021/jp1002403||Abstract:||Interactions between phospholipid vesicles and poly(acrylic acid) (PAA) are of fundamental importance for pH-sensitive delivery systems in pharmaceutical applications. In this study, we investigated the behavior of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) at varied concentrations of PAA with low and high molecular weights. Differential scanning calorimetry and fluorescence microscopy experiments suggested that hydrogen bonding between the carboxyl group of PAA and the phosphodiester group of the lipid is the main driving force for association under acidic conditions. Complexation between DPPC and PAA depends on the PAA molecular weight and concentration. At high enough concentrations of the large molecular weight PAA, the polymer can completely disrupt the bilayers of DPPC. For the small molecular weight PAA, in contrast, the complexation leads to vesicle aggregation without destroying the bilayers. The difference in complex structure was detected by SEM and a UV visible spectrophotometer. At alkaline pH, complexation did not occur because of strong dissociation of PAA. © 2010 American Chemical Society.||Source Title:||Journal of Physical Chemistry B||URI:||http://scholarbank.nus.edu.sg/handle/10635/89262||ISSN:||15206106||DOI:||10.1021/jp1002403|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Dec 4, 2019
WEB OF SCIENCETM
checked on Nov 27, 2019
checked on Nov 30, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.