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Issue 33, 2013
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Chloroform micro-evaporation induced ordered structures of poly(L-lactide) thin films

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Abstract

Self-assembly of poly(L-lactide) (PLLA) in thin films induced by chloroform micro-evaporation was investigated by microscopic techniques and X-ray diffraction studies. A film-thickness dependent on highly ordered structures has been derived from disordered films. Ring-banded spherulitic and dendritic morphologies with radial periodic variation of thicknesses were formed in dilute solution driven by micro-evaporation of the solvent. Bunched morphologies stacked with a flat-on lozenge-shaped lamellae were created in thinner films. The formation of the concentric ring banded structures was attributed to the periodic rhythmic growth associated with radial periodic changes in the concentration gradient of PLLA. A diffusion-induced rhythmic growth mechanism was proposed to explain the formation of the ring banded morphologies with periodic variation of thicknesses.

Graphical abstract: Chloroform micro-evaporation induced ordered structures of poly(l-lactide) thin films

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Publication details

The article was received on 16 Mar 2013, accepted on 03 Jun 2013 and first published on 03 Jun 2013


Article type: Paper
DOI: 10.1039/C3RA41266K
Citation: RSC Adv., 2013,3, 13705-13711

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    Chloroform micro-evaporation induced ordered structures of poly(L-lactide) thin films

    S. Huang, H. Li, Y. Shang, D. Yu, G. Li, S. Jiang, X. Chen and L. An, RSC Adv., 2013, 3, 13705
    DOI: 10.1039/C3RA41266K

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