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

被引：10

作者：

Huang, Shaoyong ^{[1
]}

Li, Hongfei ^{[2
]}

Shang, Yingrui ^{[3
]}

Yu, Donghong ^{[4
]}

Li, Gao ^{[1
]}

Jiang, Shichun ^{[3
]}

Chen, Xuesi ^{[1
]}

An, Lijia ^{[2
]}

机构：

[1] Key Lab Polymer Ecomat, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

[3] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China

[4] Aalborg Hosp, Dept Biotechnol Chem & Environm Engn, DK-9000 Aalborg, Denmark

来源：

RSC ADVANCES | 2013年 / 3卷 / 33期

基金：

中国国家自然科学基金;

关键词：

SOLVENT-INDUCED CRYSTALLIZATION; ATOMIC-FORCE MICROSCOPY; RING-BANDED SPHERULITES; CRYSTAL-STRUCTURE; POLY(EPSILON-CAPROLACTONE) SOLUTION; ISOTACTIC POLYSTYRENE; MELTING BEHAVIOR; POLYMER CRYSTALS; GROWTH; MORPHOLOGY;

D O I：

10.1039/c3ra41266k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：13705 / 13711

页数：7

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