Study on Nano-Silica in Protection of Paper

In this work , the role of nano-silica in protection of paper works were investigated. Nano-silica was used as protective coating on the surface of the paper. To prove the protective of this coating, the mechanical properties and the ultraviolet absorption of paper were measured, such as tensile strength, folding endurance, tear strength, the glossiness and brightness of paper. The results show that the tensile strength and the folding endurance of paper coated with nano-silica have increased, the tear strength of paper coated with nano-silica has dicrease, and the glossiness and brightness remained unchanged. The paper coated by nano-silica has strong absorption peaks for ultraviolet radiation from 200 nm to 300 nm.