Preparation of PEO/clay nanocomposites using organoclay produced via micellar adsorption of CTAB.
The aim of this study was the preparation of polyethylene oxide (PEO)/clay nanocomposites using organoclay produced via micellar adsorption of cethyltrimethyl ammonium bromide (CTAB) and their characterisation by X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectra, and the investigation of certain mechanical properties of the composites. The results show that the basal distance between the layers increased with the increasing CTAB/clay ratio as parallel with the zeta potential values of particles. By considering the aggregation number of CTAB micelles and interlayer distances of organo-clay, it could be suggested that the predominant micelle geometry at lower CTAB/clay ratios is an ellipsoidal oblate, whereas, at higher CTAB/clay ratios, sphere-ellipsoid transition occurs. The increasing tendency of the exfoliation degree with an increase in clay content may be attributed to easier diffusion of PEO chains to interlayer regions. FT-IR spectra show that the intensity of Si-O stretching vibrations of the organoclays (1050 cm(-1)) increased, especially in the ratios of 1.0 g/g clay and 1.5 g/g clay with the increasing CTAB content. It was observed that the mechanical properties of the composites are dependent on both the CTAB/clay ratios and clay content of the composites.
Department of Chemistry Education, Kazım Karabekir Education Faculty, Atatürk University, 25240 Erzurum, Turkey. ahmetgu@yahoo.com
Ahmet
A
Gürses
Mehtap
M
Ejder-Korucu
Çetin
Ç
Doğar
D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry* / Q000493:pharmacokinetics; D000077215:Clay; D004553:Electric Conductivity; D008823:Micelles; D053761:Nanocomposites / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D011092:Polyethylene Glycols / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013718:Tensile Strength; D014961:X-Ray Diffraction
D000538:Aluminum Silicates; D002593:Cetrimonium Compounds; D008823:Micelles; D011092:Polyethylene Glycols; D000077215:Clay; D000077286:Cetrimonium