1.2 Objectives of the Study This study aims to prepare and characterize paper using superhydrophobic calcium carbonate nanoparticles derived from waste egg shells. Specifically it aims to: • prepare CaCO3 powder from waste eggshell. • functionalize the prepared CaCO3 powder with stearic acid. • characterize the functionalized and EDX. • powder using X-Ray Diffraction, SEM, FTIR, measure the contact angle of the powder using the Image J application. • coat the functionalized CaCO3 and optimize the loading ratio of the Polystyrene and the functionalized calcium carbonate unto paper. • characterize the paper using X-Ray Diffraction, SEM, FTIR, and EDX. • measure the contact angle of the paper using Image J application.