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Super macroporous poly( N ‐isopropyl acrylamide) cryogel for separation purpose
Author(s) -
Sahiner Nurettin
Publication year - 2018
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4326
Subject(s) - lower critical solution temperature , materials science , polymer , swelling , acrylamide , chemical engineering , isopropyl , fourier transform infrared spectroscopy , polymer chemistry , thermogravimetric analysis , solvent , copolymer , composite material , organic chemistry , chemistry , engineering
Polymers that can respond reversibly by changing their physical or chemical properties are recognized as stimuli‐responsive polymers. The renowned temperature‐sensitive polymer is poly( N ‐isopropyl acrylamide) (p(NIPAM)), and here, homopolymeric supermacroporous p(NIPAM)) cryogel was synthesized via cryopolymerization technique at cryogenic condition (below melting point of solvent, −18°C). Then, the prepared p(NIPAM) cryogel was characterized via scanning electron microscopy, Fourier transform infrared radiation spectrometer, and thermogravimetric analyzer. The lower critical solution temperature (LCST) value of the prepared p(NIPAM) cryogel was determined from % swelling equilibrium swellings at various temperatures, 20, 25, 30, 35, 40, 45, and 50°C, respectively. Furthermore, the pore volume and porosity of p(NIPAM) cryogels were compared below and above the LCST values. Finally, the separation capability of p(NIPAM) cryogels for some molecules such as tannic acid, gallic acid, nicotine (N), and caffeine (C) was investigated at the below and above the LCST values.