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Influence of Solvents on the Formation of Honeycomb Films by Water Droplets Templating
Author(s) -
Tian Ye,
Ding Huaiyu,
Jiao Qingze,
Shi Yanqiao
Publication year - 2006
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200500462
Subject(s) - solvent , polymer , surface area to volume ratio , porosity , chemical engineering , polymer chemistry , chemistry , membrane , materials science , volume (thermodynamics) , organic chemistry , thermodynamics , biochemistry , physics , engineering
Summary: Several solvents were utilized to investigate their influence on the formation of honeycomb patterns. The polymers PPO, PLGA and PLLGA were dissolved in different solvents or mixed solvents to form porous membranes. It was found that a good compatibility between the polymers and their solvents, and an appropriate volatility of the solvent were beneficial for the formation of regular structures. Moreover, C 2 HCl 3 and CH 2 Cl 2 , neither of whose PPO solutions could form regular structures at 30 °C, were mixed at different volume ratios to dissolve PPO and fabricate porous structures. The result showed that a regular pattern was achieved when the volume ratio of C 2 HCl 3 :CH 2 Cl 2 was 90:10 and that a special structure with big pores surrounded by small pores was obtained when the volume ratio of C 2 HCl 3 :CH 2 Cl 2 was 10:90. Based on these phenomena, possible reasons were also proposed.