Super macroporous poly(N-isopropyl acrylamide) cryogel for separation purpose

ŞAHİNER N.

POLYMERS FOR ADVANCED TECHNOLOGIES, vol.29, no.8, pp.2184-2191, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 8
  • Publication Date: 2018
  • Doi Number: 10.1002/pat.4326
  • Journal Name: POLYMERS FOR ADVANCED TECHNOLOGIES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2184-2191
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

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 degrees 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 degrees 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.