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- 저자 : Supason P. Wanichwecharungruang (검색결과 1 건)
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Self-Assembly of Negatively Charged Poly(vinyl alcohol) Derivatives
Paramee Jitjumnong,Supason P. Wanichwecharungruang,Sunatda Arayachukeat 한국고분자학회 2010 Macromolecular Research Vol.18 No.8
This paper reports the relationship between the degree of negatively charged groups on the poly(4-vinyloxybutane sulfonate-co-vinyl alcohol) or PVA-BS and poly(4-vinyloxybutane sulfonate-co-vinyloxydodecane-covinyl alcohol) or PVA-12C-BS polymers and their self-assembled particles’ morphologies. With grafted hydrophobic moieties (PVA-12C-BS polymers), the size of the self-assembled particles decreased with increasing levels of butane sulfonate substitution. However, with no hydrophobic moiety grafted (PVA-BS), the size of the self-assembled particles increased with increasing levels of butane sulfonate substitution. The response of the PVA-BS and PVA-12C-BS polymeric particles to the loading of a model hydrophobic compound, 2-ethylhexyl-4-methoxycinnamate (EHMC), was markedly different. With the drug as a hydrophobic core, EHMC-loaded PVA-BS particles were smaller in size and more stable than the unloaded particles. In contrast, the EHMC-loaded PVA-12C-BS particles were larger than the corresponding unloaded particles.
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