In this work, the morphology of zirconia, alumina, and silicas was studied and static sorption of the repellents N, N-diethyl-3-methylbenzamide and ethyl-3-[acetyl(butyl)amino]propionate on these oxides was carried out. ZrO2, Al2O3, SiO2 phenyl were shown to have high sorption activity to the repellents N,N-diethyl-3-methylbenzamide (239 mg/g for SiO2 phenyl) and ethyl-3-[acetyl(butyl)amino]propionate (251 mg/g for ZrO2). Pointedly, it was found that despite having the largest pore volume and high speci c surface area (compared to the other studied oxides), SiO2 C2 has a signi cantly inferior sorption capacity in respect to other oxides, in particular SiO2 phenyl, which can be explained by the presence of the phenyl group in the latter that has chemical a nity for repellent molecules. Obtained isotherms of SiO2 300 also con rm the low sorption activity towards N,N-diethyl-3-methylbenzamide. The sorption equilibrium for both repellents, in most cases, is described by the Langmuir monomolecular adsorption model. The obtained results suggest that the studied zirconia, alumina, and silica can be used as carrier components of repellents.

In this study, thermoplastic polyurethane (TPU) with 30%wt hard segment content (HSC) was synthesized using isophorone diisocyanate (IPDI), 1, 4-butanediol (BDO) as the chain extender, and polycaprolactone (PCL) with three different molecular weights (2000, 4000, and 10000) as polyols. Fourier-transform infrared spectroscopy (FTIR), hydrogen nuclear magnetic resonance (H-NMR), X-ray diffraction (XRD), and differential scanning calorimetry (DSC) analysis were used to evaluate the chemical microstructure and physical characteristics of polycaprolactones (PCLs) and thermoplastic polyurethanes (TPUs). The results showed that the crystallinity and the glass transition temperature (Tg) of TPUs became different depending on the molecular weight of the PCL soft segments. A tensile strength was used to evaluate the mechanical properties of TPUs. It was observed that increasing the molecular weight of PCL decreased the elongation at break and increased the ultimate tensile strength. The permeability of CO 2 and N 2 gase over wide ranges of pressure (3 to 9 atm) was examined, and the permselectivity of the membranes was determined. It was concluded that an increase in the feeding gas pressure led to an increase in the gas permeability of all samples. It was observed that in TPU samples, the increase in the molecular weight of PCLs led to a decrement in selectivity and an increase in permeability of CO 2 and N 2 gas.