Isotropic-nematic phase transition in aqueous sepiolite suspensions.

@article{Woolston2015IsotropicnematicPT,
  title={Isotropic-nematic phase transition in aqueous sepiolite suspensions.},
  author={Phillip Woolston and Jeroen S van Duijneveldt},
  journal={Journal of colloid and interface science},
  year={2015},
  volume={437},
  pages={65-70}
}
Aqueous suspensions of sepiolite clay rods in water tend to form gels on increase of concentration. Here it is shown how addition of a small amount (0.1% of the clay mass) of a common stabiliser for clay suspensions, sodium polyacrylate, can allow the observation of an isotropic-nematic liquid crystal phase transition. This transition was found to move to higher clay concentrations upon adding NaCl, with samples containing 10(-3) M salt or above only displaying a gel phase. Even samples that… CONTINUE READING
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