The application of fluorine silicone rubber in the aerospace field benefits from its unique molecular structure and excellent overall performance.


The material contains both fluorine atoms and silicon atoms. It combines the oil resistance and chemical resistance of fluorine rubber with the wide temperature domain adaptability and elasticity of silicone rubber. It can work stably for a long time in extreme environments from -55℃ to 200℃, and has become a key material to ensure the safety of aircraft.


In the manufacture of rockets and spacecraft, fluorosilicate rubber is widely used in key seals.For example, the O-ring of the fuel delivery pipe of the Long March 5 rocket adopts a special fluorine silicone rubber formula, which has successfully withstood the long-term corrosion of liquid oxygen kerosene fuel to ensure zero leakage in the fuel system.；


Fluorine silicone rubber is added to the adhesive of the heat insulation tile of a certain type of return cabin, which solves the problem of brittleness of traditional glue at high temperatures and guarantees the thermal protection performance during re-entry into the atmosphere.


In addition, the seal of the rocket propellant storage tank adopts a strong oxidant-resistant compound developed by Zhonglan Chenguang, which can resist the erosion of strong oxidizing substances in the propellant.


In the field of aircraft manufacturing, the application of fluorine silicone rubber covers fuel, hydraulic and avionics systems.In the fuel system, the valve diaphragm of the fuel tank pressure regulating pipeline adopts a cloth film composed of fluorine silicone rubber coating and polyester cloth, which can maintain stable performance in kerosene vapor and high temperature fuel environments.；


The sealing ring of a domestic large aircraft fuel pump adopts a double-layer fluorine silicone rubber structure, which increases the anti-leakage cycle by 40%.In the hydraulic system, the hydraulic pipeline seals of the landing gear need to withstand the transient temperature difference of -55℃ to 200℃. The low temperature elasticity and high temperature stability of fluorosilicate rubber ensure the reliability of the hydraulic system.


In avionics systems, conductive fluorine silicone rubber is used in seals of satellite power supply systems to achieve insulation and electromagnetic shielding functions at the same time, and to meet the stringent requirements of spacecraft for electromagnetic compatibility.


In response to extreme environmental challenges, fluorosilicate rubber continuously optimizes its performance through modification technology.For example, by introducing vinyl siloxane copolymer modification, its oil resistance and chemical resistance can be further improved；


Through special formulas and processes, high-temperature-resistant fluorine silicone rubber can maintain physical and mechanical properties in environments exceeding 200℃.In addition, the radiation aging resistance of fluorine silicone rubber is better than that of methyl vinyl silicone rubber, and the material stability can be maintained for a long time in the space radiation environment.


With the evolution of aerospace technology, the application scenarios of fluorine silicone rubber are constantly expanding.For example, 3D printed fluorosilicate rubber components have been used in UAV oil pipelines to achieve integrated molding of complex structures; the self-lubricating fluorosilicate rubber developed by Jiangsu enterprises solves the lubrication problem of spacecraft moving parts.


In the future, with the mass production of low-temperature-resistant fluorine silicone rubber and the promotion of lead-free environmentally friendly formulas, the material will play a greater role in more demanding working conditions such as deep space exploration and hypersonic aircraft.