Investigation of Surface Thermodynamic Properties and Structural Isomer Separation Capability of Sodium Alginate/<i>Hypericum perforatum</i> Composites


Guven M., ERDOĞAN ÇAKAR A., IŞIK B., CANKURTARAN Ö.

MACROMOLECULAR CHEMISTRY AND PHYSICS, cilt.227, sa.8, 2026 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 227 Sayı: 8
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1002/macp.70261
  • Dergi Adı: MACROMOLECULAR CHEMISTRY AND PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, MEDLINE
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In the present investigation, biocomposites were created by inserting the biomass of Hypericum perforatum (HP), which is regarded as a material that generates zero waste, into a biopolymer composed of sodium alginate (SA) at weight ratios of 10%, 20%, and 30%. Using Fourier transform infrared-attenuated total reflectance (FTIR-ATR) spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD) studies, the biocomposites that were produced were analyzed and described. Inverse gas chromatography (IGC) was used to explore the surface properties of these materials throughout a temperature range of 303.2-328.2 K. The Dorris-Gray, Donnet-Park, Schultz, and Hamieh methods were utilized in this investigation. The determination of the specific adsorption enthalpy, the specific adsorption free energy, and the acid-base constants for both HP and the SA/HP composites was made possible using experiments that were carried out at an infinite dilution. Additionally, the selectivity coefficients (alpha) of structural isomers were determined at infinite dilution for a variety of acetate and alcohol isomers within the same temperature range. This was accomplished by employing the IGC technique.