Reversible swelling of polyanion/polycation multilayer films in solutions of different ionic strength
Citations Over TimeTop 1% of 1996 papers
Abstract
Abstract Immersion of consecutively adsorbed polyanion/polycation multilayer films in solutions of different ionic strength causes reversible thickness changes. Swelling of the films up to 18% was observed after soaking the films in aqueous solutions of NaCl at concentrations up to 1.0 mol/1. X‐ray reflectivity clearly shows that the thickness changes are reversible within experimental error and that the films seem to get smoother after several cycles of immersion in salt solutions and in pure water. The extent of swelling depends on the internal film structure, namely on the number of polyanion/polycation interfaces in a film of a given thickness. Interestingly, the swelling levels off at salt concentrations above 0.1 mol/1 and no additional changes were observed even at NaCl concentrations of 3.0 mol/1 over periods of several days. It is believed that Na + and Cl − ions penetrate reversibly into the films and are responsible for the observed effects.
Related Papers
- → Polymer particle erosion controlling drug release. II. Swelling investigations to clarify the release mechanism(2002)57 cited
- → Water swelling behaviors of silica-reinforced NBR composites in deionized water and salt solution(2010)29 cited
- Experimental Study on Confined Swelling Characteristic of Redbed Mudstone in Chongqing(2015)
- → Preparation and Swelling Inhibition of Polyammonium(2012)1 cited
- → Swelling Phenomena(2005)