The aim is to probe micellar structures of three common industrial fluorotelomer surfactants used in fire-fighting foam formulations (Figure 1) using contrast variation SANS. These surfactants will be studied individually, and as mixed systems, using typical compositions found in fire-fighting foam formulations. The data will allow to (1) identify the adopted micelle structures for each surfactant and (2) understand how/if aggregation is affected by mixing. This is the first stage in a new 3-year program, including SANS, so that F-carbon surfactants can be replaced by more environmentally-responsive low-F or hydrocarbon analogues. Chris Hill is a 1st year PhD student fully funded by fire-fighting technology company Angus Fire.