Thermodynamics of Polyamide Separation Membrane in Contact With Aqueous Solutions

The absorption of water in reverse osmosis membranes FT30 and LF10 is investigated by a combination of measurements of water mass uptake and biaxial stress as a function of relative humidity. Water solubility in polyamide active layer is 12 wt% at a relative humidity of 95%. The slope of a water concentration versus humidity curve can be used to calculate inter-diffusivity of water in polyamide active layers. By combining the measurements of water mass uptake and biaxial stress, we estimate the specific volume of water in the active layers to be ∼ 30%.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Materials Science and Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Zhang, Xijing

Contributors dc:contributor

• Cahill, David G.

• Engineering, Materials Science

Language dc:language

eng

Identifier

(MiAaPQ)AAI3347570

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/82837