Preparation of Polyethylene Glycol Monoliths by Thermally Induced Phase Separation Method: Detailed Characterization Study and Investigation of Application
POLYMER ENGINEERING AND SCIENCE, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/pen.70765
- Dergi Adı: POLYMER ENGINEERING AND SCIENCE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Chemical Abstracts Core, Chimica, Compendex, INSPEC, Engineering Source (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- İstanbul Üniversitesi Adresli: Evet
Özet
Polyethylene glycol (PEG) monoliths were prepared by thermally induced phase separation method (TIPS). Determining the solvent and non-solvent is important for phase separation and morphological control of monoliths. Both single solvents (toluene, ethanol (EtOH), dimethyl sulfoxide (DMSO)) and solvent mixtures (EtOH:DMSO (1:1), EtOH: hexane (2:1), and EtOH: hexane (1:1)) were successful in performing phase separation. The porosity of the monoliths ranged up to 81%. The change in the polymer concentration and solvent ratio affected the monolith morphology. The monoliths have an average pore area of 0.59-1.62 mu m2, average skeleton area of 0.30-0.97 mu m2, with corresponding average pore and skeleton radius ranging from 1.57-2.29 mu m and 1.65-2.50 mu m, respectively. Nitrogen adsorption-desorption isotherms showed the monolith prepared using EtOH + hexane (2:1) had a large specific surface area of 53.8 m2/g. Crystallinity of the monoliths obtained from XRD data was consistent with the DSC. It was determined that a monolith can carry 85 times its own weight. The cloud point was found by visual turbidity method and the values varied between 25 degrees C and 35 degrees C. The "D distance" indicating the solvent quality was calculated using Hansen solubility parameters. Some of the monoliths were able to effectively absorb oils up to 3-3.5 times their own weight.