The invention relates to a paper deacidification liquid and a preparation method thereof, the paper deacidification liquid comprises a
fluorocarbon deacidification liquid and an alkaline deacidification substance, the
fluorocarbon deacidification liquid comprises, by volume, 1-10% of
perfluoropolyether, 10-30% of a
perfluoroether solvent and 60-89% of perfluorohexanone, and the ratio of the
mass of the alkaline deacidification substance to the volume of the
fluorocarbon solvent is 0.1-10 g / L. According to the
fluorine-containing paper deacidification liquid, a synergistic effect is generated by virtue of opposite electrostatic potentials of
perfluoroether and perfluoroketone, a steric hindrance effect is formed by virtue of
perfluoropolyether with a long molecular chain, and the
fluorine-containing paper deacidification liquid with high-stability suspension dispersion is obtained without depending on perfluorocarboxylate and perfluorosilane surfactants. The pH value and the alkali storage capacity of the treated paper are remarkably improved, meanwhile, the paper cannot be wrinkled and adhered, and the
color difference, the tensile strength and the
handwriting change of the paper are not obvious. The adopted
fluorine-containing
solvent is high in
inertia, rapid in volatilization, low in price and suitable for large-scale paper deacidification treatment.