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Hybrid membranes based on SiO 2 /polyether‐ b ‐polyamide: Morphology and applications
Author(s) -
Sforça Maurício L.,
Yoshida Inez V. P.,
Borges Cristiano P.,
Nunes Suzana P.
Publication year - 2001
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.1837
Subject(s) - pervaporation , polyamide , differential scanning calorimetry , membrane , materials science , copolymer , chemical engineering , polymer chemistry , morphology (biology) , aqueous solution , transmission electron microscopy , hybrid material , scanning electron microscope , polymer , chemistry , composite material , organic chemistry , nanotechnology , permeation , biochemistry , physics , biology , engineering , thermodynamics , genetics
Hybrid materials were prepared incorporating silica networks by the sol–gel process into the poly(amide‐ b ‐polyether) block copolymer PEBAX®. PEBAX®/silica hybrids were characterized by transmission electron microscopy, atomic force microscopy, differential scanning calorimetry, and X‐ray diffraction. The pervaporation of phenol from dilute aqueous solutions through hybrid membranes was investigated. Films prepared with lower silica contents showed better dispersed inorganic networks and were more selective in the pervaporation of phenol/water solutions. Films prepared with higher silica contents had a clear phase‐separated morphology with lower performance in pervaporation. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 178–185, 2001