Publication
Influence of the ionic and nonionic surfactants mixture in the structure and properties of the modified bentonite clay
| Summary: | A new surface modification in calcium bentonite clay (Bent-Ca) was investigated in this work, from the sequential intercalation of three types of surfactants: cetyltrimethylammoniumbromide (CTAB), cationic surfactant, sodiumdodecyl sulfate (SDS), anionic surfactant, and lauryl alcohol ethoxylated (ALEO), nonionic surfactant. Three modifications in the Bent-Cawere prepared in aqueous solution obtaining conventionally the OBent-Iwith CTAB and OBent-IIwith CTAB+SDS, beyond the newmodification OBent-IIIwith TAB+SDS+ALEO. The synergistic effect of the sequentialmixture of surfactants used in the surfacemodification of Bent-Ca was characterized by X-ray Diffraction (XRD), Fourier Transform by Infrared Radiation (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersion Spectroscopy (EDS), Optical Microscopy (OM), Thermogravimetric Analysis (TG), Contact Angle Test and Swelling Index. The results indicated that OBent-III was the reinforcement material among the analyzed ones that presented the highest values of basal spacing (13 nm), thermal stability (400 °C), superficial lipophilicity index (79.76°) and swelling index in polar or apolar medium (6–10 mL/g). Therefore, a reinforcing material suitable for various applications was proposed |
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| Main Authors: | Monteiro, Mayra Kerolly Sales |
| Other Authors: | Oliveira, Victor Rafael Leal de; Santos, Francisco Klebson Gomes dos; Barros Neto, Eduardo Lins de; Leite, Ricardo Henrique de Lima; Aroucha, Edna Maria Mendes; Silva, Karyn Nathallye de Oliveira |
| Subject: | Bentonite Surface modification Surfactant blend Intercalation Dispersion |
| Year: | 2021 |
| Country: | Brazil |
| Document type: | article |
| Access type: | unknown |
| Associated institution: | IBICT |
| Language: | English |
| Origin: | Oasisbr |
| Summary: | A new surface modification in calcium bentonite clay (Bent-Ca) was investigated in this work, from the sequential intercalation of three types of surfactants: cetyltrimethylammoniumbromide (CTAB), cationic surfactant, sodiumdodecyl sulfate (SDS), anionic surfactant, and lauryl alcohol ethoxylated (ALEO), nonionic surfactant. Three modifications in the Bent-Cawere prepared in aqueous solution obtaining conventionally the OBent-Iwith CTAB and OBent-IIwith CTAB+SDS, beyond the newmodification OBent-IIIwith TAB+SDS+ALEO. The synergistic effect of the sequentialmixture of surfactants used in the surfacemodification of Bent-Ca was characterized by X-ray Diffraction (XRD), Fourier Transform by Infrared Radiation (FTIR), Scanning Electron Microscopy (SEM), Energy Dispersion Spectroscopy (EDS), Optical Microscopy (OM), Thermogravimetric Analysis (TG), Contact Angle Test and Swelling Index. The results indicated that OBent-III was the reinforcement material among the analyzed ones that presented the highest values of basal spacing (13 nm), thermal stability (400 °C), superficial lipophilicity index (79.76°) and swelling index in polar or apolar medium (6–10 mL/g). Therefore, a reinforcing material suitable for various applications was proposed |
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