فعال سازي خاك هاي طبيعي ايران به منظور ساخت نانوكامپوزيت هاي پليمري

Modification of Domestic Clays for Preparation of Polymer Nanocomposites

Montmorillonite, layered silicates, are used widely for preparing polymer nanocomposites. In present paper, domestic clays containing montmorillonite mineral were used. Firstly, mines related to these types of soils were studied and then 20 types of samples were supplied from extractor companies. After optimizing purification conditions, the best clay was selected and then ion exchange process was carried out for synthesizing suitable organoclays. The organoclay, a coupling agent compound and polypropylene with different ratios were mixed and nanocomposite plates were fabricated. Finally, the properties of these nanocomposites were compared with that of a standard sample. Characterization techniques such as XRD, XRF, SEM, AFM, mechanical strength, HDT, impact strength were used in this work. The tensile strength, impact strength and HDT of the best prepared nanocomposite, containing 5 wt % organoclay and 10 wt % coupling agent compound, in comparision with polypropylene were improved to 24 %, 17 % and 55 % respectively.