Abstract
Colors on the impact or thermal papers fade easily due to the unstable and hydrophilic chromophoric group of pigment molecules. It seriously affects the readability and preservation value of the document. Superamphiphobic coating is an effective alternative solution, depending on the high resistance to water and oil. Herein, we fabricated a stable blue-purple superamphiphobic coating based on crystal violet lactone (CVL), fluoro silane (FAS) modified TiOx (TiOx@FAS), which efficiently avoided color fading of the printed papers. The shielding effect of the fluorocarbon chain and the vertical network aggregation effect protect TiOx@FAS/CVL coating from disadvantageous attacks. Both superamphiphobicity and colorfastness of coating could be maintained under attacks of different solvent gases and UV light. The coating kept purple-blue and superamphiphobic as original over 180 days, showing promising potential in practical applications.
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