Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 27: Poster: (Hydrogels) and Elastomers

CPP 27.8: Poster

Wednesday, March 28, 2012, 11:00–13:00, Poster A

MD simulations of charged hydrogels under external pressure: perspective for seawater desalination — •Tobias Richter, Peter Kosovan, and Christian Holm — Institute of computational physics, University of Stuttgart, Germany

Recent experiments show that application of mechanical pressure on charged hydrogels can be utilised to extract water with a lower salt content than the original solution in which the gel was swollen. It has been suggested to utilise this for an inexpensive method of obtaining desalinated water. We performed a series of MD simulations systematically investigating equilibrium between charged hydrogels under compression and a salt solution. In particular, we investigate the influence of chain length, degree of charging of the hydrogel and concentration of the original salt solution on the salt concentration in the obtained desalinated water.