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Abstract: In recent years, hybrid sol-gel materials have received particular attention from the scientific community for specific applications in several technological fields such as optics, electrical conduction and biochemistry. Hybrid sols of poly (vinyl alcohol) (PVA)/Al₂O₃) were prepared with Al₂O₃ Nano powder and tetra ethoxyl ortho silane as an initiator using Sol-Gel method. Aluminum solution was prepared by hydrolysis Al₂O₃ Nano powder and was mixed acid hydrochloric, relatively at low temperature in acidic pH. The reaction was carried out under vigorous stirring for 2 hours with addition of PVA solution. Hybrid material was characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and Differential scanning calorimetry (DSC). FT- IR results suggested that PVA was linked with Al₂O₃ network by chemical bonds. XRD results revealed that the crystallinity of PVA was decreased distinctly and confirmed by the DSC by the disappearance of the peaks corresponds to the crystallization temperature.

Keyword: sol-gel method; PVA; Silicon dioxide; Aluminum oxide; Hybrid materials.