Solid-state synthesis and physico-chemical characterization of modified smectites using natural clays from Burkina Faso

Solid-state intercalation was applied to prepare organo-smectites using cationic surfactants and natural clays containing smectite at various surfactant/smectite ratios. The enter the interlayers of smectites causing a swelling clays. used were collected in Siétougou Diabari villages located eastern part Burkina Faso. solid-state successful for all four applied, n-dodecyltrimethylammonium bromide, (n-C12H25(CH3)3NBr), n-tetradecyltrimethylammonium (n-C14H29(CH3)3NBr), n-hexadecyltrimethylammonium bromide (n-C16H33(CH3)3NBr) di-n-dodecyldimethyl­ammonium ((n-C12H25)2(CH3)2NBr) different levels cation exchange capacity (CEC). synthesized characterized regarding relative density, structural textural properties. XRPD data showed systematic increase basal spacing unit cell up >38 Å 2.0-CEC loading surfactant. This indicates that penetrated into with being arranged parallel layers low concentrations almost perpendicular high ones. FTIR spectra decrease intensities water bands around 1630 cm-1 3400 cm-1, new specific close 2920 2850 assigned asymmetric symmetric stretching CH2 groups surfactants, respectively.
 
 KEY WORDS: Smectite, Organo-smectite, Surfactant, Intercalation
 Bull. Chem. Soc. Ethiop. 2021, 35(1), 43-59.
 DOI: https://dx.doi.org/10.4314/bcse.v35i1.4