Porous thin films based on photo-cross-linked star-shaped poly(D,L-lactide)s

Afia S. Karikari, Sharlene R. Williams, Cheryl L. Heisey, Adam M. Rawlett, Timothy Edward Long

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Self-assembly processes and subsequent photo-cross-linking were used to generate cross-linked, ordered microporous structures on the surfaces of well defined four-arm star-shaped poly(D,L-lactide) (PDLLA) thin films. The four-arm star-shaped PDLLAs were synthesized using an ethoxylated pentaerythritol initiator. Solutions of the PDLLAs were cast in a humid environment, and upon solvent evaporation, ordered honeycomb structures (or breath figures) were obtained. Correlations between molar mass, polymer solution viscosity, and pore dimensions were established. The average pore dimension decreased with increasing polymer solution concentration, and a linear relationship was observed between relative humidity and average pore dimensions. Highly ordered microporous structures were also developed on four-arm star-shaped methacrylate-modified PDLLA (PDLLA-UM) thin films. Subsequent photocross-linking resulted in more stable PDLLA porous films. The photo-cross-linked films were insoluble, and the honeycomb structures were retained despite solvent exposure. Free-standing, structured PDLLA-UM thin films were obtained upon drying for 24 h. Ordered microporous films based on biocompatible and biodegradable polymers, such as PDLLA, offer potential applications in biosensing and biomedical applications.

Original languageEnglish
Pages (from-to)9687-9693
Number of pages7
JournalLangmuir
Volume22
Issue number23
DOIs
Publication statusPublished - 2006 Nov 7
Externally publishedYes

Fingerprint

Stars
Honeycomb structures
honeycomb structures
Polymer solutions
porosity
stars
Thin films
polymers
thin films
Biodegradable polymers
Molar mass
initiators
Self assembly
drying
humidity
self assembly
casts
Atmospheric humidity
Drying
Evaporation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Karikari, A. S., Williams, S. R., Heisey, C. L., Rawlett, A. M., & Long, T. E. (2006). Porous thin films based on photo-cross-linked star-shaped poly(D,L-lactide)s. Langmuir, 22(23), 9687-9693. https://doi.org/10.1021/la0603020

Porous thin films based on photo-cross-linked star-shaped poly(D,L-lactide)s. / Karikari, Afia S.; Williams, Sharlene R.; Heisey, Cheryl L.; Rawlett, Adam M.; Long, Timothy Edward.

In: Langmuir, Vol. 22, No. 23, 07.11.2006, p. 9687-9693.

Research output: Contribution to journalArticle

Karikari, AS, Williams, SR, Heisey, CL, Rawlett, AM & Long, TE 2006, 'Porous thin films based on photo-cross-linked star-shaped poly(D,L-lactide)s', Langmuir, vol. 22, no. 23, pp. 9687-9693. https://doi.org/10.1021/la0603020
Karikari AS, Williams SR, Heisey CL, Rawlett AM, Long TE. Porous thin films based on photo-cross-linked star-shaped poly(D,L-lactide)s. Langmuir. 2006 Nov 7;22(23):9687-9693. https://doi.org/10.1021/la0603020
Karikari, Afia S. ; Williams, Sharlene R. ; Heisey, Cheryl L. ; Rawlett, Adam M. ; Long, Timothy Edward. / Porous thin films based on photo-cross-linked star-shaped poly(D,L-lactide)s. In: Langmuir. 2006 ; Vol. 22, No. 23. pp. 9687-9693.
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