Polymerisation of Beta Cyclodextrin and Its Characterisation by DSC, FTIR and Pxrd

Synthesis and characterisation of β-cyclodextrin polymer cross-linked with hexamethylene diisocyanate

by

Welcome T.  Mhlongo

Advanced Materials Division, Mintek, Private Bag X3015, Randburg, 2125, South Africa

*Tel: +27 11 709 4495, Fax: +27 11 709 4495 and E-mail: thabani.mhlongo@mintek.co.za

Abstract

Background

 The contamination of water with various pollutants (organic and inorganic) is a major problem to human health and the environment. Human activities contribute significantly to water pollution. Pesticides are among the most undesirable organic compounds found in water today. Researchers are continuously investigating new methods to remove these recalcitrant micro-pollutants from water. The use of cyclodextrin (CD) polymers is one of the methods that are being explored. The potential of CD monomers to encapsulate organic compounds for various objectives such as the complex formation of permethylated β-CD with the garlic derived antithrombotics (E)- and (Z)-ajoene have been studied.[1]

The polymerisation of CD monomers to form water insoluble polymer products is expected to play a dual role of adsorption and encapsulation of various organic pollutants. The polymerisation of cyclodextrins (CDs) with various cross-linkers (succinic anhydride,[2] hexamethylene diisocynate,[3] etc) and the incorporation of various nanomaterials such as carbon nanotubes[4] have been previously reported. Organic solvents were employed to dissolve the cyclodextrin monomer.

In this work the synthesis of β-cyclodextrin polymer and its characterisation using powder X-ray diffraction (pXRD), differential scanning calorimetry (DSC) and Fourier Transform Infra-red (FTIR) techniques are investigated.  

 References:    

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[1].  M. R. Caira, R. Hunter, S.  A.  Bourne, V.  J. Smith, Supramol.  Chem.16, 395-403, 2004.

[2] . T. Girek, C. A. Kozlowski, J. J. Koziol, W. Walkowiak, I. Korus, Carbohydr. Polym.59, 211-215, 2005. 

 

[3]. H. Hirai, M. Komiyama, H. Yamamoto, J. Inclusion Phenom.2, 655-660,1984. . Hirai, M. Komiyama, H. Yamamoto

[4]. K. L. Salipira, B. B. Mamba, R. W. Krause, T. J. Malefetse, S. H. Durbach, Environ. Chem. Lett. 5,13–17, 2007.

 

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