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CN-122011394-A - Fluoroalkyl silicone oil, preparation method thereof and wear-resistant hydrophobic coating

CN122011394ACN 122011394 ACN122011394 ACN 122011394ACN-122011394-A

Abstract

The invention belongs to the technical field of coating protection, and particularly relates to fluoroalkyl silicone oil, a preparation method thereof and a wear-resistant hydrophobic coating. The invention provides fluoroalkyl silicone oil which has a structure shown in a formula I: formula I, wherein R f is 5< X <20,5< y <10,0.5< z <1.5, x' y and z are integers. According to the invention, the surface energy is obviously reduced by introducing fluorinated groups (such as-CF 2 and-CF 3 ), so that the hydrophobic and oleophobic properties are realized, the main chain of silicon and silicon (-Si-O-Si-) endows the coating with flexibility and thermal stability, and the vinyl (-CH=CH 2 ) can be cured through crosslinking to form a three-dimensional network, so that the adhesive force and the wear resistance of the coating are enhanced. Through tests, the contact angle of the coating formed by the alkenyl-containing and fluoroalkyl-containing silane synthesized by the invention and the hydrogen-containing silicone oil through hydrosilylation reaction can reach 135 degrees, and the coating has excellent antifouling performance when the contact angle of the coating to oil can reach 84 degrees.

Inventors

  • ZHANG PENGFEI
  • XU JUN
  • YANG LING
  • WU JIRONG
  • XU WEIMING

Assignees

  • 杭州师范大学

Dates

Publication Date
20260512
Application Date
20260409

Claims (10)

  1. 1. A fluoroalkyl silicone oil characterized by having a structure represented by formula I: A formula I; Wherein R f is 5< X <20,5< y <10,0.5< z <1.5, x' y and z are integers.
  2. 2. The fluoroalkyl silicone oil according to claim 1, wherein the mass percentage of fluorine element in the fluoroalkyl silicone oil is 10-20%.
  3. 3. The method for producing a fluoroalkyl silicone oil according to claim 1 or 2, characterized by comprising the steps of: Mixing a compound 1, a compound 2, a compound 3, a compound 4 and a first catalyst, and performing condensation reaction to obtain the fluoroalkyl silicone oil; Compound 1 is Compound 2 is Compound 3 is Compound 4 is 。
  4. 4. The method of claim 3, wherein the first catalyst is H 2 PtCl 6 ·6H 2 O catalyzed; The molar ratio of the compound 1 to the compound 2 to the compound 3 to the compound 4 is 0.5-2:0.5-1:0.07-0.15:0.032.
  5. 5. The method according to claim 3 or 4, wherein the temperature of the condensation reaction is 60-120 ℃ and the time is 20-60 min.
  6. 6. The preparation method of claim 5, wherein the condensation reaction is followed by cooling, washing, removing low-boiling-point substances, removing impurities by adsorption and filtering to obtain the fluoroalkyl silicone oil.
  7. 7. The method according to claim 6, wherein the washing liquid is a saturated sodium chloride solution; The adsorbent for adsorption impurity removal comprises active carbon, and the mass ratio of the adsorbent to a system after removing low-boiling-point substances is 0.3-1.2:100.
  8. 8. The preparation method according to claim 6, wherein the temperature for removing the low-boiling-point substances is 150-170 ℃, the vacuum degree for removing the low-boiling-point substances is-0.096 to-0.056 MPa, and the time for removing the low-boiling-point substances is 30-90 min.
  9. 9. The wear-resistant hydrophobic coating is characterized by comprising fluoroalkyl silicone oil, hydrogen-containing silicone oil, a second catalyst and an organic solvent, wherein the fluoroalkyl silicone oil is the fluoroalkyl silicone oil of claim 1 or 2 or the fluoroalkyl silicone oil prepared by the preparation method of any one of claims 3-8; the mass ratio of the fluoroalkyl silicone oil to the hydrogen silicone oil is 5-40:1.
  10. 10. The abrasion-resistant hydrophobic coating of claim 9, wherein said organic solvent comprises toluene, xylene or cyclohexane; the second catalyst comprises a Kasite platinum catalyst, and the content of the second catalyst in the wear-resistant hydrophobic coating is 5-20 ppm.

Description

Fluoroalkyl silicone oil, preparation method thereof and wear-resistant hydrophobic coating Technical Field The invention belongs to the technical field of coating protection, and particularly relates to fluoroalkyl silicone oil, a preparation method thereof and a wear-resistant hydrophobic coating. Background The fluorine-containing silane compound has become a key building block of a high-performance surface protection material by virtue of a unique 'double-function' molecular structure, and one end of the molecule of the fluorine-containing silane compound contains a functional group (such as alkoxy, chlorine, alkenyl and the like) with high reactivity, and the fluorine-containing silane compound can chemically react with the surfaces of various substrates such as metal, glass, concrete and the like to form stable covalent bonding, so that excellent interface adhesion and durability are provided. The other end of the molecule of the fluorine-containing silane compound is connected with a perfluoroalkyl or fluoroalkyl chain segment, and the highly fluorinated structure endows the material with extremely low surface energy property, so that the material has excellent hydrophobic and oleophobic properties. In recent years, fluorosilane hydrophobic coatings developed based on the compound are widely applied to key engineering fields exposed to severe environments such as building outer walls, bridge steel structures, ocean platform facilities and the like by virtue of outstanding water repellency, antifouling and self-cleaning capabilities. The core value of such coatings is the superhydrophobic effect and self-cleaning effect that they induce. The water drops form a high contact angle on the superhydrophobic surface and are extremely easy to roll off, and meanwhile, pollutants such as dust, salt and the like on the surface are taken away. The characteristic can not only remarkably reduce maintenance cost, but also inhibit adhesion and accumulation of pollutants such as water vapor, greasy dirt, dust and the like on the surface of the substrate for a long time. This is particularly important for high precision or high safety demanding application scenarios. For example, in the electronic field, electrostatic accumulation (ESD) induced by contaminants (especially conductive dust) is effectively prevented, and serious accidents such as short circuit, element damage, and even fire disaster of precision electronic equipment due to electrostatic discharge can be avoided. However, existing commercial products still have significant limitations in overall performance. For example, perfluoropolyethers (PFPEs) tend to penetrate into the fluorinated surface layer during use due to segment rearrangement, free volume expansion, and the oil molecules tend to damage the fluorinated surface layer, resulting in insufficient abrasion resistance and long-lasting hydrophobic properties (especially against oily contaminants). It is these bottleneck problems that highlight the urgency and great significance of developing novel high-performance fluorosilane silicone oils. Disclosure of Invention In view of the above, the invention provides a fluoroalkyl silicone oil, a preparation method thereof and a wear-resistant hydrophobic coating, and a coating formed by the coating containing the fluoroalkyl silicone oil has excellent waterproof property, strong adhesion with a substrate, difficult falling off and good wear resistance. In order to solve the technical problems, the invention provides fluoroalkyl silicone oil which has a structure shown in a formula I: A formula I; Wherein R f is 5< X <20,5< y <10,0.5< z <1.5, x' y and z are integers. Preferably, the fluorine element in the fluorine-containing alkyl silicone oil accounts for 10-20% by mass. The invention also provides a preparation method of the fluoroalkyl silicone oil, which comprises the following steps: Mixing a compound 1, a compound 2, a compound 3, a compound 4 and a first catalyst, and performing condensation reaction to obtain the fluoroalkyl silicone oil; Compound 1 is Compound 2 isCompound 3 isCompound 4 is。 Preferably, the first catalyst is H 2PtCl6·6H2 O catalyzed; The molar ratio of the compound 1 to the compound 2 to the compound 3 to the compound 4 is 0.5-2:0.5-1:0.07-0.15:0.032. Preferably, the temperature of the condensation reaction is 60-120 ℃ and the time is 20-60 min. Preferably, the condensation reaction further comprises the steps of sequentially cooling, washing, removing low-boiling-point substances, adsorbing, removing impurities and filtering the system after the condensation reaction to obtain the fluoroalkyl silicone oil. Preferably, the washing liquid is saturated sodium chloride solution; The adsorbent for adsorption impurity removal comprises active carbon, and the mass ratio of the adsorbent to a system after removing low-boiling-point substances is 0.3-1.2:100. Preferably, the temperature for removing the low-boiling-point substances is 150