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Formation of Polyethylene Glycol on Montmorillonite by Sterilization with Ethylene Oxide

Published online by Cambridge University Press:  02 April 2024

A. Pusino ,
M. Gennari ,
A. Premoli  and
C. Gessa
A. Pusino
Affiliation:
Istituto di Chimica Agraria, Università di Sassari, Via E. de Nicola 10, 07100 Sassari, Italy
M. Gennari
Affiliation:
Istituto di Chimica Agraria, Università di Torino, Via P., Giuria 15, 10126 Torino, Italy
A. Premoli
Affiliation:
Istituto di Chimica Agraria, Università di Sassari, Via E. de Nicola 10, 07100 Sassari, Italy
C. Gessa
Affiliation:
Istituto di Chimica Agraria, Università di Sassari, Via E. de Nicola 10, 07100 Sassari, Italy
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Abstract

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The effect of ethylene oxide-sterilization on homoionic (Na+, K+, Ca2+, Cu2+, Al3+, and Fe3+) montmorillonite samples was examined. The results indicate that ethylene oxide polymerized to polyethylene glycol in the interlayer of Cu2+-, Al3+-, and Fe3+-saturated clays, as substantiated by the increase in the d(001) values, as well as by the decrease in the cation-exchange capacity after reaction. On the contrary, ethylene oxide failed to react in the presence of the Na+-, K+-, and Ca2+-clays, likely due to the lower acidity of the exchange cations.

Keywords

AdsorptionInfrared spectroscopyEthylene oxideInterlayer cationsMontmorillonitePolymerizationSterilizationX-ray powder diffraction
Type
Research Article
Information
Clays and Clay Minerals , Volume 38 , Issue 2 , April 1990 , pp. 213 - 215
Copyright
Copyright © 1990, The Clay Minerals Society

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