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Application of supercritical carbon dioxide in the preparation of biodegradable polylactide membranes
Author(s) -
Xu Qun,
Pang Maizhi,
Peng Qi,
Li Jianbo,
Jiang Yu
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21132
Subject(s) - supercritical carbon dioxide , membrane , supercritical fluid , solvent , materials science , chemical engineering , scanning electron microscope , polymer , polymer chemistry , chemistry , organic chemistry , composite material , biochemistry , engineering
The application of supercritical carbon dioxide (SCCO 2 ) has been attracting more and more attention, especially in the formation of polymer membranes. The membrane formation using SCCO 2 is analogous to conventional immersion precipitation process by using organic nonsolvent. Polylactide (PLA) membranes were prepared by phase separation with SCCO 2 as nonsolvent. Two kinds of solvents were used to study the effect of the solvent on the cross‐section structure of the PLA membrane and the compatibility between the solvent and SCCO 2 was studied. The effect of the solvent and the preconditioning on the morphology of the PLA membrane was also investigated through scanning electron microscope, wide‐angle X‐ray diffraction, and polarizing microscopy. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 2158–2163, 2004