and the receding contact angle is preferably as small as possible i e the contact angle hysteresis is preferably very small for example less than 10 u00b0 advantageously the tilting angle of the material is very small preferably less than 10 u00b0 more preferably less than 7 u00b0 and most preferably less than 5 u00b0 the term u201c cvd u201d refers to chemical vapour deposition the term ftes refers to 1h 1h 2h 2h perfluorooctyltriethoxysilane the term akd refers to alkylketene dimer the term asa refers to alkenyl succinic anhydride and the term ftcs refers to tridecafluoro 1 1 2 2 tetrahydrooctyl trichlorosilane the term u201c nanocellulose u201d refers to a collection of isolated cellulose microfibrils or microfibril bundles derived from cellulose raw material microfibrils have typically high aspect ratio the length might exceed two five or ten micrometers while the number average diameter is typically below 200 nm the diameter of microfibril bundles can also be larger but generally less than 1 u03bcm the smallest microfibrils are similar to the so called elementary fibrils which are typically 2 12 nm in diameter the dimensions of the fibrils or fibril bundles are dependent on the raw material and a disintegration method the nanofibrillated cellulose may also contain some hemicelluloses the amount may be dependent on the plant source in this application the term u201c nanocellulose particles u201d refers to a discrete physical entity formed of several nanocellulose microfibrils therefore each nanocellulose particle typically comprises several tens hundreds even thousands nanocellulose microfibrils advantageously the nanocellulose particles in the coating have a.