X-Ray Diffraction Study of Suspensions of Toluene with CH3(CH2)n-1N+(CH3)3 -Type Montmorillonite, Where n=1, 2, 6, 8, 10, 12, 14, 16 and 18

  • Yoshiaki Fukushima


The structure and swelling behaviour of CH3(CH2)n-1N+(CH3)3-type montmorillonite by toluene were studied by X-ray diffraction. The CH3(CH2)n-1N+(CH3)-type montmorillonites were prepared by ion exchange from natural Na+-type montmorillonite in aqueous solutions of CH3(CH2)n-1N+(CH3)3-C1, -Br or -I. When n<8‚ the interlayer distance did not change, and it was about 1.4 nm. When n>l0, however, the interlayer distance increased lineary from 1.63 nm for n=10 to 2.33 nm for n=18. These results suggest that when n<8, the CH3(CH2)n-1N+(CH3)3 ions arrange parallel to silicate layers of clay, and when n>10 they cannot arrange parallel to the layers. When n>12, the ion exchanged clays were swollen by toluene, and the interlayer distance of clays in suspensions were 3.92 nm for n=12, 4.25 nm for n=14, 4.83 nm for n=16, and 5.25 nm for n=18. The interlayer distances in suspensions correspond to the configuration where all the alkyl chains of guest molecules arrange perpendicular to the silicate layer of clay. The interlayer distance, however, did not change even when the toluene content in suspensions increased. When n<10, the ion exchanged clays were not swollen by toluene, and the interlayer distances in suspensions were not different from the ion exchanged clays themselves. The swelling behaviour is supposed to be related to the interaction between toluene molecules and the alkyl chains of guest molecules and to the cohesive forces between silicate layers of the ion exchanged montmorillonites


Alkyl Chain Cation Exchange Capacity Guest Molecule Silicate Layer Alkyl Chain Length 
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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • Yoshiaki Fukushima
    • 1
  1. 1.Toyota Central Research & Development Laboratories, Inc.Nagakute-cho, Aichi-gun, Aichi-kenJapan

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