Skip to main content
    • Aa
    • Aa

Swelling behavior of montmorillonite cation exchanged for ω-amino acids by ∊-caprolactam

  • Arimitsu Usuki (a1), Masaya Kawasumi (a1), Yoshitsugu Kojima (a1), Akane Okada (a1), Toshio Kurauchi (a1) and Osami Kamigaito (a1)...

Natural Na-montmorillonite was cation exchanged for the ammonium cations of various ω-amino acids [H3N+(CH2)n−1 COOH, n = 2, 3, 4, 5, 6, 8, 11, 12, and 18]. X-ray diffraction (XRD) results suggested that the chain axes of ω-amino acids with a carbon number of eight or less were parallel to the silicate layers, and that the chain axes of those with a carbon number of 11 or more were slanted to the layers. The cation-exchanged montmorillonites form intercalated compounds with ∊-caprolactam at 25 °C. The montmorillonites intercalated with both ω-amino acid and ∊-caprolactam were studied by XRD measurement at room temperature and 100 °C. We propose a model where amino acid molecules were arranged perpendicular to silicate layers and ∊-caprolactam molecules filled the space between them. When the ∊-caprolactam was melted at 100 °C, the basal spacing for the montmorillonite increased, in which the carbon number exceeds 11. This phenomenon will be applicable to obtaining the nylon 6-clay hybrid, a molecular composite of nylon 6 and montmorillonite.

Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

1 K. Norrish , Discuss. Faraday Soc. 18, 120 (1954).

2 Y. Fukushima , Clay and Clay Minerals 32, 320 (1984).

4 A. Weiss , Angew. Chem. Int. Ed. Eng. 2, 134 (1963).

7 G. Lagaly , Angew. Chem. Int. Ed. Eng. 15, 575 (1976).

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 126 *
Loading metrics...

Abstract views

Total abstract views: 347 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 28th June 2017. This data will be updated every 24 hours.