Selective molecular permeability induced by glass transition dynamics of semicrystalline polymer ultrathin films

Toshinori Fujie, Yuko Kawamoto, Hiroki Haniuda, Akihiro Saito, Koki Kabata, Yukio Honda, Eriko Ohmori, Toru Asahi, Shinji Takeoka

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Most polymers solidify below a glass transition temperature (T g), which is important for the fabrication of polymeric materials. The glass transition dynamics (GTD) of polymers alters their physical properties and therefore the range of applications suitable for the particular materials. In this regard, most GTD studies were oriented to the thermodynamics of amorphous polymer systems, while little studies were known for semicrystalline polymers. Here, we focus on the glassy and crystalline properties of semicrystalline polymers such as poly(l-lactic acid) (PLLA) and envisage to control the nanostructure of free-standing PLLA ultrathin films (referred as "PLLA nanosheets"), via thermodynamic rearrangement of polymer chains entangled in a quasi-two-dimensional interface during the GTD process. The annealing process on the PLLA nanosheets (<100 nm thick) resulted in the formation of semicrystalline domains and microscopic apertures with polymer chains (∼100 nm in size). Such nanostructure surprisingly induced selective molecular permeability, which was controlled as a function of film thickness and inherent crystallinity. The present methodology demonstrates the direct conversion of thermodynamic properties of semicrystalline polymers into the functional nanostructured polymeric materials.

Original languageEnglish
Pages (from-to)395-402
Number of pages8
JournalMacromolecules
Volume46
Issue number2
DOIs
Publication statusPublished - 2013 Jan 22

Fingerprint

Ultrathin films
Polymer films
Glass transition
Polymers
Lactic Acid
Lactic acid
Nanosheets
Nanostructures
Thermodynamics
Nanostructured materials
Film thickness
Thermodynamic properties
Physical properties
Annealing
Crystalline materials
Fabrication

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry

Cite this

Selective molecular permeability induced by glass transition dynamics of semicrystalline polymer ultrathin films. / Fujie, Toshinori; Kawamoto, Yuko; Haniuda, Hiroki; Saito, Akihiro; Kabata, Koki; Honda, Yukio; Ohmori, Eriko; Asahi, Toru; Takeoka, Shinji.

In: Macromolecules, Vol. 46, No. 2, 22.01.2013, p. 395-402.

Research output: Contribution to journalArticle

Fujie, Toshinori ; Kawamoto, Yuko ; Haniuda, Hiroki ; Saito, Akihiro ; Kabata, Koki ; Honda, Yukio ; Ohmori, Eriko ; Asahi, Toru ; Takeoka, Shinji. / Selective molecular permeability induced by glass transition dynamics of semicrystalline polymer ultrathin films. In: Macromolecules. 2013 ; Vol. 46, No. 2. pp. 395-402.
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