In the journey of cultural relics protection, polysilazane is becoming a powerful "guardian" to protect historical treasures with its excellent performance.
Polysilazane is an organic-inorganic hybrid polymer with a Si-N bond structure as a repeating main chain, which has unique performance advantages. It has the chemical and oxidative stability, high temperature resistance, corrosion resistance, and hydrophobicity of silicon, as well as the chemical inertness and hydrophobicity of nitrogen. These characteristics make it shine in the field of cultural relics protection.
In terms of stone cultural relics protection, polysilazane can form a dense protective film. The polysilazane molecules covering the surface of stone cultural relics are connected to the cultural relics matrix through polar bonds, the non-polar ends are exposed to the outside, and the hydrophilic groups are arranged inside, which is effective in waterproofing and weathering. For example, for some precious stone sculptures, after being treated with polysilazane, the erosion of moisture and harmful substances can be significantly reduced, the weathering rate can be slowed down, and the original shape and texture of the sculpture can be maintained.
In the protection of murals, the Dunhuang Academy uses visible light-cured polysilazane to repair the murals' alkali damage in 5 minutes. After the repair, the strength is increased by 50 times and it is completely transparent, which will not affect the appearance and artistic value of the murals.
In addition, polysilazane also has good adhesion and hardness, and can form a solid protective layer on the surface of cultural relics to resist damage from the external environment. Under harsh conditions such as high temperature and high humidity, it can still play a stable protective role and provide long-term protection for cultural relics.
With the continuous advancement of science and technology, the application prospects of polysilazane in the field of cultural relics protection will be broader. I believe that in the future, polysilazane will continue to contribute important forces to the protection of human cultural heritage and the inheritance of historical civilization, so that more historical treasures can be inherited forever.