Montmorillonite Modified with Liquid Crystalline Diol Hydrochlorides: Preparation and Characterization (CROSBI ID 135113)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Brnardić, Ivan ; Huskić, Miroslav ; Žigon, Majda ; Ivanković, Marica
engleski
Montmorillonite Modified with Liquid Crystalline Diol Hydrochlorides: Preparation and Characterization
Intercalation of liquid crystalline species into the interlayer space of montmorillonite was performed by the ion-exchange method. Liquid crystalline diol hydrochlorides that differ in the spacer lengths (6, 8 or 10 methylene units) and the type of end group bound to mesogen (nitro or methoxy) was used. Parent clay, purified clay (montmorillonite) and organically modified montmorillonite were characterized by X-ray diffraction analysis (XRD) and simultaneous differential scanning calorimetry-thermogravimetric analysis. (DSC-TGA). The basal spacing of unmodified montmorillonite, determined by XRD, was 1.25 nm and after modifications with -[Bis(2-hydroxyethyl)amino]- -(4-nitroazobenzene-4'-oxy)alkane hydrochloride it increased up to 1.96 nm. XRD peak broadening and a loss of peak intensity were very pronounced in the montmorillonite modified with -[Bis(2-hydroxyethyl)amino]- -(4-methoxyazobenzene-4'-oxy)alkane hydrochloride, with 10 methylene units, indicating a disordered structure. TGA results showed that the modification reduced the adsorption of water from 8% for unmodified montmorillonite to 2-3 % for organically modified montmorillonite and that that the cation exchange between inorganic and organic ions was between 40 and 50%.
Organics ; Silicates ; X-ray Diffraction ; Thermal Analysis
Glavni autori: Marica Ivanković, Ivan Brnardić
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
Podaci o izdanju
354 (18)
2008.
19861-1991
objavljeno
0022-3093
1873-4812
10.1016/j.jnoncrysol.2007.11.008
Povezanost rada
Kemijsko inženjerstvo, Temeljne tehničke znanosti