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CN-122010763-A - High-thermal-stability perfluoropolyether derivative, preparation method thereof, nano coating composition and application thereof

CN122010763ACN 122010763 ACN122010763 ACN 122010763ACN-122010763-A

Abstract

The invention relates to the technical field of high polymer materials, in particular to a high-thermal-stability perfluoropolyether derivative, a preparation method thereof, a nano coating composition and application thereof. The shielding effect of fluorine atoms on highly polarized fluorocarbon bonds on the perfluoropolyether main chain on the carbon-carbon main chain is utilized, so that the skeleton main chain is not easily damaged, and the perfluoropolyether derivative has excellent chemical stability and high temperature resistance; meanwhile, because fluorine atoms have stronger electronegativity, make interaction force among the perfluoro polyether molecules smaller, therefore possess extremely low surface tension and good hydrophobic oleophobic performance, have high optical transparency and good adhesion and durability when forming the nano-coating.

Inventors

  • PAN CHENGJUN
  • CAO YONG
  • CHEN LIN
  • Chen Roujun
  • Xu Zhenyin
  • ZHANG HUA

Assignees

  • 东莞市华鑫钻磐科技有限公司

Dates

Publication Date
20260512
Application Date
20251216

Claims (10)

  1. 1. A perfluoropolyether derivative with high thermal stability, which is characterized by comprising a K-type perfluoropolyether main chain and an amino-containing alkane chain segment connected to the tail end of the K-type perfluoropolyether main chain through an amide bond.
  2. 2. The high thermal stability perfluoropolyether derivative of claim 1 wherein the amine-containing alkane segment is derived from a primary diamine H 2 N-R-NH 2 wherein R is a C 2 -C 12 alkylene group.
  3. 3. The high thermal stability perfluoropolyether derivative of claim 2 wherein R is a C 4 -C 8 alkylene group.
  4. 4. A process for the preparation of a high thermal stability perfluoropolyether derivative as defined in any one of claims 1 to 3 comprising the steps of: modifying the tail end of K-type perfluoropolyether acyl fluoride in inert atmosphere to obtain perfluoropolyether-carboxylic acid and perfluoropolyether- (ether bond-containing) carboxylic acid; mixing the perfluoropolyether-carboxylic acid and the perfluoropolyether- (ether bond-containing) carboxylic acid with an amino alkane compound and an organic solvent, and carrying out amidation reaction to obtain a reaction product; and (3) carrying out post-treatment on the reaction product to obtain the perfluoropolyether derivative.
  5. 5. The method for producing a perfluoropolyether derivative having high thermal stability according to claim 4, wherein the amidation reaction is carried out at a temperature of 0℃to 60℃and a time of 2 hours to 12 hours.
  6. 6. The method for preparing a perfluoropolyether derivative having high thermal stability according to claim 4, wherein the post-treatment comprises extracting the reaction product 3 to 5 times with methanol, trifluorotrichloroethane and deionized water, then decompressing, distilling and drying.
  7. 7. A nanocoating composition characterized by comprising, in mass percent: A perfluoropolyether derivative according to any one of claims 1 to 3, 0.01% -5.0%; 0-2% of an auxiliary agent; 95.0% -99.99% of solvent.
  8. 8. The nano-coating composition according to claim 7, wherein the auxiliary agent comprises one or more of a leveling agent and a wetting agent, and the solvent is one or more selected from the group consisting of hydrofluoroethers, perfluoroalkanes, alcohols, and ketones.
  9. 9. Use of a nanocoating composition according to any one of claims 7-8 in a hydrophobic transparent coating.
  10. 10. The application of claim 9, wherein the hydrophobic transparent coating is paved on the surface of a plastic substrate, and the plastic substrate is made of one of polycarbonate, polyethylene terephthalate and polybutylene terephthalate.

Description

High-thermal-stability perfluoropolyether derivative, preparation method thereof, nano coating composition and application thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a high-thermal-stability perfluoropolyether derivative, a preparation method thereof, a nano coating composition and application thereof. Background The perfluoro polyether is a high molecular compound with main chain composed of carbon, oxygen and fluorine atoms, has low surface energy, good chemical inertness and higher thermal stability, and is commonly used as a lubricant and a surface treating agent. Plastic materials such as Polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and the like are widely used in the fields of electronics, automobiles, packaging, optical devices and the like because of their light weight, easy processing, low cost and the like. However, such plastics have a relatively high surface energy and are susceptible to contamination by liquids such as water and oils, which can affect their appearance and performance. Therefore, the method provides stable and durable hydrophobic and even super-hydrophobic properties for the plastic surface, and has important practical significance. In the prior art, the adhesion force between the perfluoropolyether and the substrate is often enhanced by introducing a silane group or other polar groups at the end of the perfluoropolyether. However, the modification method has the following problems that firstly, the thermal stability of the modified perfluoropolyether is reduced, the application of the modified perfluoropolyether in a scene requiring higher temperature resistance is limited, secondly, the formed coating is endowed with the hydrophobic property of a substrate and simultaneously damages the original high light transmittance of the plastic substrate, and thirdly, the coating with a single composition is difficult to realize wide and excellent hydrophobic effect aiming at different types of plastic substrates. Accordingly, the prior art is still in need of improvement and development. Disclosure of Invention In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a perfluoropolyether derivative with high thermal stability, a preparation method thereof, a nano coating composition and application thereof, and aims to solve the problems that the thermal stability of the prior modified perfluoropolyether is low and the original high light transmittance of a plastic substrate is damaged. The technical scheme of the invention is as follows: A perfluoropolyether derivative with high thermal stability, which consists of a K-type perfluoropolyether main chain and an amino-containing alkane chain segment connected to the tail end of the K-type perfluoropolyether main chain through an amide bond. The high-heat-stability perfluoropolyether derivative, wherein the amino-containing alkane chain segment is derived from primary diamine H 2N-R-NH2, and R is alkylene of C 2-C12. The high-heat-stability perfluoropolyether derivative is characterized in that R is alkylene of C 4-C8. A process for the preparation of a perfluoropolyether derivative of high thermal stability comprising the steps of: modifying the tail end of K-type perfluoropolyether acyl fluoride in inert atmosphere to obtain perfluoropolyether-carboxylic acid and perfluoropolyether- (ether bond-containing) carboxylic acid; mixing the perfluoropolyether-carboxylic acid and the perfluoropolyether- (ether bond-containing) carboxylic acid with an amino alkane compound and an organic solvent, and carrying out amidation reaction to obtain a reaction product; and (3) carrying out post-treatment on the reaction product to obtain the perfluoropolyether derivative. The preparation method of the high-heat-stability perfluoropolyether derivative comprises the following steps of carrying out amidation reaction at a temperature of 0-60 ℃ for 2-12 hours. The preparation method of the high-heat-stability perfluoropolyether derivative comprises the steps of extracting a reaction product for 3-5 times by using methanol, trifluorotrichloroethane and deionized water, and then decompressing, distilling and drying. A nano-coating composition comprising, in mass percent: 0.01% -5.0% of perfluoropolyether derivative; 0-2% of an auxiliary agent; 95.0% -99.99% of solvent. The nano coating composition comprises one or more of a leveling agent and a wetting agent, wherein the solvent is one or more of hydrofluoroether, perfluoroalkane, alcohols and ketones. Use of a nanocoating composition in a hydrophobic transparent coating. The application comprises that the hydrophobic transparent coating is paved on the surface of a plastic substrate, and the material of the plastic substrate is one of polycarbonate, polyethylene terephthalate and polybutylene terephthalate. The beneficial effects are that: the invention p