I. Basic characteristics of molecular structure
Silicon chain skeleton characteristics
Si-O bond energy is as high as 452kJ/mol, giving the material wide temperature range stability of -60~200℃
The helical molecular configuration provides excellent flexibility, and the surface tension is as low as 20-24mN/m

Fluorocarbon chain structural characteristics
The C-F bond length is short (about 0.132nm), and the electronegativity difference is 1.43, forming a strong polar barrier
The trifluoropropyl side chain reduces the surface energy of the material to 15-20mN/m, and the contact angle reaches 110°

II. Specific manifestations of synergy
Improved thermal stability
The high temperature resistant skeleton of the silicon oxygen chain is combined with the shielding effect of fluorine atoms to increase the decomposition temperature to 240℃
The synergistic effect increases the thermal oxidation stability by 3-5 times, and the applicability of aviation lubricants is enhanced

Surface performance optimization
The fluorocarbon chains are arranged in a directional manner to form a -CF3 outer layer, Synergistically reduce the friction coefficient by 0.2-0.3 with the silicon-oxygen chain
Molecular assembly membrane increases the maximum non-seizure load of the four-ball test by 40%

Enhanced chemical stability
The weather resistance of the silicon-oxygen chain and the inertness of the fluorine atom cooperate to expand the acid and alkali resistance range to pH1-14
Improved solvent tolerance, volume swelling rate in acetone and xylene <5%

III. Key parameters for performance regulation
Regulatory factors influence range Performance change trend F/Si molar ratio 0.1-0.5 Oleophobicity linear enhancement Molecular weight 50,000-500,000 Film-forming property exponential growth End group type Hydroxyl/methyl Storage stability difference

IV. Verification of typical application scenarios
Aviation lubrication field: Synergistic effect extends the life of the boundary lubrication film to 8 times that of mineral oil
Textile treatment: The double-repellent property keeps the contact angle of the fabric >100° after 50 washes
Electronic packaging: The dielectric constant is stable at 2.8-3.2, which is better than the pure silicone oil system