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Intercalation of both CTMAB and Al13 into montmorillonite

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Abstract.
Clays intercalated with both organic cations and hydroxy-metal cations, also known as inorganic–organic
clays (IOCs), have drawn great interests in the recent years because they possess the properties of both
organoclays and pillared layered clays (PILCs). In this work, cetyltrimethyl ammonium bromide (CTMAB)
and hydroxy-aluminum ([Al13O4(OH)24(H2O)12]7+ or Al13) were selected as the representatives of organic
cations and hydroxy-metal cations, and three different methods were employed for the intercalation of
montmorillonite at various CTMAB/Al13 ratios. This work aims to provide some novel information for
clarifying the structural characteristics of IOCs. The experimental results showed that the structures of
the resulting IOCs strongly depended on the intercalation methods and CTMAB/Al13 ratio. Both the intercalation agents could be intercalated into montmorillonite if they were used simultaneously for the intercalation, or if Al13 was intercalated after CTMAB, and the resulting IOCs were shown to have large basal
spacing and small surface areas. However, if Al13 was intercalated first, the loading amounts of CTMAB
would decrease significantly when the used Al13 amounts were relatively large (>4 mmol Al/g montmorillonite).
This could be attributed to the ‘‘lock” effect of montmorillonite’s layers by the pre-intercalated
Al13, and the basal spacing values of the resulting IOCs were shown to be equal to those of the PILCs.

Keywords:
Inorganic–organic clays
Montmorillonite
Hydroxy-aluminum
Cationic surfactant
Intercalation

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Colloid and Interface Science 335 (2009) 77–83

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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