Following the success of nylon-clay nanocomposites developed by Toyota over two decades ago, polymer/clay nanocomposites have received a great deal of attention in both academia and industry.The addition of only a small amount of nanoclay to a polymer matrix has improvement of optical, mechanical, flame resistant, and barrier properties in comparison to the corresponding pristine polymers or conventional. The synthesis methods are divided into three main groups: solution exfoliation, melt intercalation and in situ intercalative polymerization. The last method corresponding to in situ polymerization may be the most desirable method for preparing nanocomposites because the types of nanoparticles and the nature of polymer precursors can vary in a wide range to meet the requirements. Fluoropolymers with high fluorine contents exhibit remarkable properties, such high thermal, chemical aging, and weather resistance, excellent inertness to solvents, low surface energy (oil and water repellency), low flammability, and moisture absorption. Furthermore, the presence of the strong C-F bond has a crucial impact on the high hydrolytic stability; these materials have found specific applications in many fields of high technology. For fabrication of hydrophobic surfaces, fluoroalkyl chains have a better potential because the chains are more rigid than n-alkyl chains. These polymers show excellent hydrophobicity that is related to the ordered arrangement of perfluoroalkyl groups at the outermost layer. This work are focused on the preparation of nanocomposites fluoropolymer/ organomodified phosphonium clay by in situ radical polymerisation of 2,2,2-trifluorethyl methacrylate using AIBN as initiator. The obtained nanocomposites were characterized by IR, NMR, XRD, SEM, DSC and TGA. Their surface properties were studied by Contact Angle measurements, and the relationships structure-surface properties were established. The authors thank the CNRST (Morocco)- TÜBITAK (Turkey) program.