Diffusion of salt through electri?fied porous carbon, studied with the colloidal charge sensor

Abstract

In this thesis the diffusion of salt through porous carbon is studied. In particular, we use the colloidal charge sensor setup [1, 2] to determine the diffusion rate of salt through an externally charged porous carbon membrane. We succeeded in performing these measurements, but we had to use a few workarounds for practical problems. Salt transport across the membrane appeared to occur mainly via wide pores in which ions are hardly affected by changes in surface charge.

[1] Albert P. Philipse, Bonny W. M. Kuipers, and Agienus Vrij. "A thermodynamic gauge for mobile counter-ions from colloids and nanoparticles". In: Faraday Discuss. 181 (2015), pp. 103-121. doi: 10.1039/C4FD00261J. url: http://dx.doi.org/10.1039/C4FD00261J. [2] Jos van Rijssel et al. "Thermodynamic Charge-to-Mass Sensor for Colloids, Proteins, and Polyelectrolytes". In: ACS Sensors 1.11 (2016), pp. 1344-1350. doi: 10.1021/acssensors.6b00510. url: http://dx.doi.org/10.1021/acssensors.6b00510.