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GEOREF RECORD

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

Xiao Chunguang, Lang Feng, Xiang Yu, Lin Yi and Li Duxin
Preparation and characterization of quaternary ammonium salt and 3-aminopropyltriethoxysilane-modified sericite mica
Clay Minerals (June 2021) 56 (2): 87-98

Abstract

Modified sericite mica was prepared by combining the intercalation of cetyltrimethylammonium bromide (CTAB) through ion exchange and surface modification of 3-aminopropyltriethoxysilane (KH550) with the following steps: high-temperature activation of sericite mica, acid activation, sodium modification, LiNO (sub 3) treatment, the ion-exchange intercalation of the cetyltrimethylammonium cation (CTA (super +) ) and surface modification of KH550. High-temperature activation was the most critical step for the modified sericite mica, and the number of hydroxyl groups of mica under high temperature directly affected the surface modification of KH550. The effects of various activation temperatures on the surface modification of sericite mica were investigated. The structure of activated sericite mica was intact when activation temperature was 600 degrees C or 700 degrees C, and the surface modification of sericite mica was not affected. The structure of activated sericite mica was partially destroyed at 800 degrees C. The optimal temperature for activating sericite mica was 700 degrees C. The structure and morphology of modified sericite mica were characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller (BET) analysis and loose bulk volume. The KH550 could not only chemically graft onto the surface of sericite mica, but also enter into the interlayer through electrostatic attraction after its end amino group was protonated. The interlayer spacing of modified sericite mica increased to 3.22 nm, indicating that it might be an excellent layered silicate for preparing clay-polymer nanocomposites.


ISSN: 0009-8558
EISSN: 1471-8030
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 56
Serial Issue: 2
Title: Preparation and characterization of quaternary ammonium salt and 3-aminopropyltriethoxysilane-modified sericite mica
Affiliation: Central South University, State Key Laboratory of Powder Metallurgy, Changsha, China
Pages: 87-98
Published: 202106
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
References: 39
Accession Number: 2022-010007
Categories: Mineralogy of silicatesSedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, 1 table
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2022
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