Muggundha Raoov
Universiti Sains, Malaysia
Title: Synthesis and characterization of cyclodextrin functionalized ionic liquid polymer for the extraction of phenols
Biography
Biography: Muggundha Raoov
Abstract
β-Cyclodextrin functionalized ionic liquid polymer (βCD-BIMOTs-TDI) was first synthesized by functionalized β-cyclodextrin (CD) with 1-benzylimidazole (BIM) to form monofunctionalized CD (βCD-BIMOTs), and was further polymerized using toluene diisocyanate (TDI) as a linker to form insoluble βCD-BIMOTs-TDI. The βCD-BIMOTs-TDI was characterized using various tools and the results obtained were compared with those derived from the native β-cyclodextrin polymer (βCD-TDI). The scanning electron microscope (SEM) results showed that the presence of ionic liquid (IL) increased the pore size, while the thermo gravimetric analysis (TGA) results showed that the presence of IL increased the stability of the βCD-BIMOTs-TDI. Meanwhile, Brunauer-Emmett-Teller (BET) result showed that βCD-BIMOTs-TDI had 1.254 m2/g surface area and the Barret-Joyner-Halenda (BJH) pore size distribution result revealed that the polymer exhibited macropores with a pore size of 77.66 nm. Preliminary sorption experiments were carried out and the βCD-BIMOTs-TDI polymer showed enhanced sorption capacity and high removal towards phenols. Based on preliminary sorption experiment, 2,4-dichlorophenol (2,4-DCP), 2,4,6-trichlorophenol (2,4,6-TCP), and 2,4-dinitrophenol (2,4-DNP) were selected for batch adsorption study. The adsorption process on βCD-BIMOTs-TDI was found to be in the order of 2,4-DNP > 2,4,6-TCP > 2,4-DCP. In addition, adsorption mechanism was studied and was proposed by considering inclusion complex and π-π interaction between modified β-CD functionalized IL (βCD-BIMOTs) with one selected phenol compound (2,4-DCP). Apart from that, a new method was developed by applying βCD-BIMOTs-TDI as an adsorbent material for solid phase extraction (SPE) of phenols in water samples by using Gas Chromatography–Flame Ionization Detector (GC-FID).