NANOCOMPOSITE MEMBRANE FOR OXYGEN CONCENTRATION

The proposed work addresses the need for improved materials and portable devices for oxygen concentration and delivery to ease the disabling effects of chronic obstructive pulmonary disease. Phase I research will examine the process and compositional variables for a new oxygen permselective membrane using an interpenetrating polymer network exhibiting facilitated oxygen transport. The relationship of input air pressure, temperature, and humidity on the diffusion rates and selectivity for oxygen through this membrane will be determined in order to optimize performance. This work will also focus on applying reported results using an inexpensive doped-polyphenylene oxide ionomer membrane as well as a control Nafion membrane. The doped ionomer membrane is easy and inexpensive to make and can be fabricated into arrays of microtubes for efficient concentration of oxygen from ambient air. The combination of these microarrays together with a small air pump and battery is expected to have acceptable weight and volume for a portable device operating continuously. The research in Phase I will include measurements of the mechanical strength, permeation rates for oxygen and nitrogen and physical uniformity, and ageing characteristics of the membrane as a function of temperature and humidity. Phase II will focus on design, fabrication and testing of a practical, lightweight oxygen concentrator.