Preparation and Characterization of Cetyl Trimethylammonium Intercalated Sericite

Abstract

Intercalated sericite was prepared by intercalation of cetyl trimethylammonium bromide (CTAB) into activated sericite through ion exchange with the following two steps: the activation of sericite by thermal modification, acid activation and sodium modification; the ion exchange intercalation of CTA+into activated sericite. Effects of reaction time, reaction temperature, CTAB quantity, kinds of medium, and aqueous pH on the intercalation of activated sericite were examined by X-ray diffraction (XRD) analysis, Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The results indicated that the CTA+entered sericite interlayers and anchored in the aluminosilicate interlayers through strong electrostatic attraction. The arrangement of CTA+in sericite interlayers was that alkyl chain of CTA+mainly tilted at an angle about 60° (paraffin-type bilayer) and 38° (paraffin-type monolayer) with aluminosilicate layers. The largest interlayer space was enlarged from 0.9 nm to 5.2 nm. The intercalated sericite could be used as an excellent layer silicate to prepare clay-polymer nanocomposites.

Preparation and characterization of quaternary ammonium salt and 3-aminopropyltriethoxysilane-modified sericite mica

“…This is because the terminal amino group of KH550 was protonized under acidic conditions, entering the interlayer of sericite mica through ion exchange (Lai et al, 2014). The observed d-spacings were greater than those reported in previous work under the same modification conditions or using other intercalation agents (Theng, 2012;Ding et al, 2014;Zawrah et al, 2014;Zhang et al, 2015;Siregar et al, 2018). In addition, there is limited previous work on the comprehensive treatment of sericite mica combining intercalation and surface modification.…”

“…Therefore, it was necessary to modify the sericite mica to improve its dispersion in polymers matrix and its compatibility with polymers, so as to enhance its performance and use value (Hokkaido, 1994;Uno et al, 2009). At present, the modification of sericite mica mainly includes surface graft modification by a coupling agent and intercalation modification by organic ammonium cation (Gao et al, 2007;Yu , 2007;Jia et al, 2013;Liang et al, 2013;Ding et al, 2014;Yang et al, 1999). In addition sericite mica particles have been covered with TiO 2 inorganic particles (Yun et al, 2002;Ren et al, 2007), cesium oxide doped with synthetic calcium/mica compound silica (El-Toni et al, 2006), multi-channel encapsulation method and so on (Skale et al, 2008).…”

“…At present, the modification of sericite mica mainly involves surface graft modification by a coupling agent and intercalation modification by an organic ammonium cation (Yang et al, 1999;Gao et al, 2007;Yu, 2007;Jia et al, 2013;Liang et al, 2013;Ding et al, 2014). In addition, sericite mica particles have been covered with TiO 2 inorganic particles (Yun et al, 2002;Ren et al, 2007) and caesium oxide doped with synthetic calcium/mica compound silica (El-Toni et al, 2006), as well as using the multi-channel encapsulation method and so on (Skale et al, 2008).…”

Transforming ground mica into high-performance biomimetic polymeric mica film

“…Mica, the only macroscopic transparent sheet-like natural layered clay, has attracted great attention due to its impressive properties, including visible-light transparency, ultraviolet (UV)-shielding, atomic level flatness, electric insulation, temperature stability, and chemical durability 12 – 15 . More recently, thin sheet mica with a macroscopic area and a thickness below 100 nm was mechanically exfoliated from natural sheet mica by Scotch tape.…”

Cellulose and Vanadium Plasmonic Sensor to Measure Ni2+ Ions

“…They possess desirable mechanical and chemical characteristics, such as high surface area, high tensile strength, high stiffness, and lack of apparent toxicity [40][41][42][43][44]. In spite of having its outstanding properties, CNCs were surface-modified with cetyltrimethylammonium bromide (CTAB) through hydroxyl groups to generate their moderate hydrophobic, simultaneously serves as a promising matrix for attaching nanoparticles [45][46][47]. On the other hand, metal salt nanostructures, namely vanadium salts-also known as ammonium metavanadate (NH 4 VO 3 )-have played ideal reagents in the laboratory and analytical chemistry, which find widespread usage in the detection of drugs, gaseous, and N-acetyltransferase activity in humans [48].…”