Permeation is a research area that focuses on the movement of substances, such as gases, liquids, or solids, through a barrier or membrane. This process is of interest in various fields, including materials science, chemical engineering, and environmental science. Researchers study the factors that influence permeation, such as the size and properties of the molecules or particles, the composition and structure of the barrier, and the conditions under which the permeation occurs (e.g. temperature, pressure, concentration gradients). Understanding permeation is important for designing and optimizing barrier materials for applications such as gas separation, water purification, drug delivery, and protective coatings. Experimental techniques such as permeability measurements, diffusion studies, and molecular modeling are commonly used to investigate permeation processes and develop predictive models. Overall, permeation research aims to improve our understanding of how different materials interact with substances and how these interactions can be controlled or manipulated for various practical purposes.