Conventional industrial methods are limited to Water Vapor Transmission Rate (WVTR) ranges larger than 10-4 g/m2/24 h. The two most common research grade procedures, the Tritium Radioactive Technique and the Optical-Electrical Calcium Degradation Test are capable of measuring Moisture Vapor Transmission Rate (MVTR) to within 10-6 g/m2/24 h.
Our method is based on direct electronic interactions between graphene and water at the molecular level, thus is capable of measuring MVTR to within10-8 g/m2/24 h.
Our method can be used to evaluate protective barrier materials directly for the most demanding applications, for example, for 2D nano-scale electronics, pharmaceuticals and other moisture sensitive materials. In addition, the method is very easy to use in a typical lab environment.
Pharmaceuticals, Biomedicals, Food, and Electronics are moisture sensitive and require protective packaging materials with increasingly improved WVTR to achieve the required quality, safety, and shelf life.