Cookies

We use cookies to ensure that we give you the best experience on our website. You can change your cookie settings at any time. Otherwise, we'll assume you're OK to continue.

Institute of Advanced Study

IAS Staff

Publication details for Prof. Chris Greenwell

Metz, Sebastian Anderson, Richard L. Geatches, Dawn L. Suter, James L., Lines, Robert & Greenwell, H. Christopher (2015). Understanding the Swelling Behavior of Modified Nanoclay Filler Particles in Water and Ethanol. The Journal of Physical Chemistry C 119(22): 12625-12642.

Author(s) from Durham

Abstract

Clay–polymer nanocomposite materials have gained much attention owing to their low weight ratio of filler to reinforcement properties, delivering lightweight yet resilient materials with excellent barrier properties to gas diffusion. An important process in their production is clay exfoliation, as maximum reinforcement and improvement of barrier properties occur when the clay mineral platelets are fully separated and dispersed through the polymer matrix with a preferred orientation. In this study we examine clay swelling—the first step leading to exfoliation—using molecular dynamics to generate solvation energetics, swelling curves, and atomic density profiles of three types of clay minerals—montmorillonite, vermiculite, and hectorite—with interlayer Na+ cations and/or three quaternary ammonium surfactants in water and ethanol. Analysis based on the provided simulations can help to distinguish between favorable and unfavorable swelling profiles of mineral/surfactant/solvent systems and therefore guide further research into this complex field.

Contact Details

Institute of Advanced Study
Durham University
Cosin's Hall
Palace Green
Durham 
DH1 3RL
Telephone: +44 (0)191 334 2589
Email: enquiries.ias@durham.ac.uk