Effect of molecular architecture on micellization, drug loading and releasing of multi-armed poly(ethylene glycol)-b-poly(ε-caprolactone) star polymers

Hyung Jun Lim, Hyunsuk Lee, Keon Hyeong Kim, June Huh, Cheol Hee Ahn, Jin Woong Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This study investigated the effect of molecular architecture of amphiphilic star polymers on micelle formation and drug loading and releasing. For this, multi-armed star block copolymers having poly(ethylene glycol) as a hydrophilic block and poly(ε-caprolactone) as a hydrophobic block were synthesized by using a divergent synthetic method consisting of a coupling reaction and a ring opening polymerization. The molecular weight and molecular weight distribution of the block copolymers were characterized by 1 H NMR and GPC measurements. Dynamic light scattering and fluorescence spectroscopic analysis were employed to observe micellization, drug loading, and drug release behaviors. We have figured out that the number of arms is a critical factor that changes critical micelle concentration as well as drug loading and releasing behaviors; increase in the number of arms not only led to lowering the critical micelle concentration and drug release rate but also increased the micelle size and drug loading efficiency.

Original languageEnglish
Pages (from-to)1817-1827
Number of pages11
JournalColloid and Polymer Science
Volume291
Issue number8
DOIs
Publication statusPublished - 2013 Aug 1
Externally publishedYes

Fingerprint

Micellization
Critical micelle concentration
releasing
Micelles
Polyethylene glycols
Block copolymers
Stars
glycols
Polymers
drugs
ethylene
stars
Spectroscopic analysis
micelles
Ring opening polymerization
polymers
Dynamic light scattering
Molecular weight distribution
Pharmaceutical Preparations
Fluorescence

Keywords

  • Drug loading
  • Drug releasing
  • Molecular architecture
  • Polymeric micelle
  • Star polymers

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

Cite this

Effect of molecular architecture on micellization, drug loading and releasing of multi-armed poly(ethylene glycol)-b-poly(ε-caprolactone) star polymers. / Lim, Hyung Jun; Lee, Hyunsuk; Kim, Keon Hyeong; Huh, June; Ahn, Cheol Hee; Kim, Jin Woong.

In: Colloid and Polymer Science, Vol. 291, No. 8, 01.08.2013, p. 1817-1827.

Research output: Contribution to journalArticle

Lim, Hyung Jun ; Lee, Hyunsuk ; Kim, Keon Hyeong ; Huh, June ; Ahn, Cheol Hee ; Kim, Jin Woong. / Effect of molecular architecture on micellization, drug loading and releasing of multi-armed poly(ethylene glycol)-b-poly(ε-caprolactone) star polymers. In: Colloid and Polymer Science. 2013 ; Vol. 291, No. 8. pp. 1817-1827.
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