Electrokinetics in nanochannels grafted with poly-zwitterionic brushes
- 180 Downloads
In this paper, we compute the electrokinetic transport in soft nanochannels grafted with poly-zwitterionic (PZI) brushes. The transport is induced by an external pressure gradient, which drives the ionic cloud (in the form of an electric double layer or EDL) at the brush surfaces to induce an electric field that drives an induced electroosmotic transport. We characterize the overall transport by quantifying this electric field, overall flow velocity, and the energy conversion associated with the development of the electric field and a streaming current. We specially focus on how the ability of the PZI to ionize and demonstrate a significant charge at both large and small pH can be efficiently maneuvered to develop a liquid transport, an electric field, and an electrokinetically induced power across a wide range of pH values.
- de Gennes P-G (1976) Scaling theory of polymer adsorption. J Phys 37:1443Google Scholar
- Lowe AB, McCormick CL (2006) Polyelectrolytes and polyzwitterions: synthesis, properties, and applications. In: ACS Symposium Series, American Chemical SocietyGoogle Scholar
- Urena-Benavides EE, Lin EL, Foster EL, Xue Z, Ortiz MR, Fei Y, Larsen ES, Kmetz AA, Lyon BA, Moaseri E, Bielawski CW, Pennell KD, Ellison CJ, Johnston KP (2016) Low adsorption of magnetite nanoparticles with uniform polyelectrolyte coatings in concentrated brine on model silica and sandstone. Ind Eng Chem Res 55:1522CrossRefGoogle Scholar