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Novel nanoporous membranes from regenerated bacterial cellulose
Author(s) -
Phisalaphong Muenduen,
Suwanmajo Thapanar,
Sangtherapitikul Preecha
Publication year - 2007
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.27118
Subject(s) - bacterial cellulose , aqueous solution , membrane , regenerated cellulose , cellulose , ultimate tensile strength , swelling , materials science , chemical engineering , dissolution , absorption of water , urea , polymer chemistry , nanoporous , nuclear chemistry , chemistry , composite material , organic chemistry , nanotechnology , biochemistry , engineering
Bacterial cellulose (BC) in an NaOH/urea aqueous solution was used as a substrate material for thefabrication of a novel regenerated cellulose membrane. The dissolution of BC involved swelling BC in a 4 wt % NaOH/3 wt % urea solution followed by a freeze–thaw process. The BC solution was cast onto a Teflon plate, coagulated in a 5 wt % CaCl 2 aqueous solution, and then treated with a 1 wt % HCl solution. Supercritical carbon dioxide drying was then applied to the formation of a nanoporous structure. The physical properties and morphology of the regenerated bacterial cellulose (RBC) films were characterized. The tensile strength, elongation at break, and water absorption of the RBC membranes were 4.32 MPa, 35.20%, and 49.67%, respectively. The average pore size of the RBC membrane was 1.26 nm with a 17.57 m 2 /g surface area. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008