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Preparation method of super-hydrophobic polyester film

A water polyester and super-hydrophobic technology, which is applied in the field of preparation of super-hydrophobic polyester films, can solve the problems of not achieving super-hydrophobic performance, and achieve the effects of excellent super-hydrophobic performance, reducing surface energy and improving hydrophobicity.

Inactive Publication Date: 2019-12-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent No. 201310444872.2 discloses a fluorine-containing PET-PTT copolyester and its preparation method, using fluorine-containing terephthalic acid, terephthalic acid, ethylene glycol and 1,3-propanediol as the main raw materials, and in a nitrogen atmosphere, the Fluorine-containing terephthalic acid, ethylene glycol, inhibitors, terephthalic acid, and 1,3-propanediol are subjected to esterification and precondensation reactions respectively, and the resulting precondensation products are subjected to final polycondensation reactions to obtain fluorine-containing PET-PTT Copolyester, due to the introduction of fluorine atoms, improves the hydrophobic, oil-repellent and antifouling properties of polyester materials, but does not achieve superhydrophobic properties

Method used

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  • Preparation method of super-hydrophobic polyester film
  • Preparation method of super-hydrophobic polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Use terephthalic acid, ethylene glycol, catalyst, and fluorinated diol (2,2,3,3-tetrafluoro-1,4-butanediol) as raw materials to stir into a uniform slurry, then add it to the reactor for esterification , the molar ratio of ethylene glycol to terephthalic acid is 1.3; the amount of fluorine-containing compound added is 10%, the catalyst is ethylene glycol, and the amount of antimony used is 0.03% of the quality of terephthalic acid. The esterification reaction is carried out under pressure in a nitrogen atmosphere, the pressure is controlled at 0.25MPa, the temperature is at 260°C, and the esterification water distillation amount reaches more than 85% of the theoretical value, which is regarded as the end point of the esterification reaction.

[0030] Heat up and vacuumize to enter the low vacuum stage. When the vacuum degree reaches below 100Kpa, the temperature is controlled at 285°C, and the polycondensation reaction starts. The reaction end point is controlled accordi...

Embodiment 2

[0034] Use terephthalic acid, ethylene glycol, catalyst, fluorinated diol (1H, 1H, 9H, 9H-perfluoro-nonanediol) as raw materials to stir into a uniform slurry, then add it to the reactor for esterification reaction, B The molar ratio of diol to terephthalic acid is 1.7; the addition amount of fluorine-containing compound is 2%, and the catalyst is antimony acetate, and the dosage is 0.01% of the mass of the terephthalic acid. The esterification reaction is carried out under pressure in a nitrogen atmosphere, the pressure is controlled at 0.3 MPa, the temperature is at 265° C., and the esterification water distillation amount reaches more than 85% of the theoretical value, which is regarded as the end point of the esterification reaction.

[0035] Heat up and vacuumize to enter the low vacuum stage. When the vacuum degree reaches below 100Kpa, the temperature is controlled at 290°C, and the polycondensation reaction starts. The reaction end point is controlled according to the s...

Embodiment 3

[0039] Use terephthalic acid, ethylene glycol, catalyst, fluorinated diol (1H, 1H, 9H, 9H-perfluoro-nonanediol) as raw materials to stir into a uniform slurry, then add it to the reactor for esterification reaction, B The molar ratio of diol to terephthalic acid is 1.1; the amount of fluorine-containing compound added is 20%, and the catalyst is antimony trioxide. The amount is 0.04% of the quality of terephthalic acid; Pressure reaction, the pressure is controlled at 0.2MPa, the temperature is at 255°C, and the distilled amount of esterification water reaches more than 85% of the theoretical value, which is regarded as the end point of the esterification reaction.

[0040] Heat up and vacuumize to enter the low vacuum stage. When the vacuum degree reaches below 100Kpa, the temperature is controlled at 280°C, and the polycondensation reaction starts. The end point of the reaction is controlled according to the stirring power. pellets to obtain fluorine-containing PET chips.

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Abstract

The invention provides a preparation method of a super-hydrophobic polyester film, which comprises the following steps: copolymerizing a fluorine-containing compound and a polyester raw material to obtain fluorine-containing polyester, blending the fluorine-containing polyester with super-hydrophobic nano powder and a lubricating modifier, and carrying out film drawing molding to obtain the super-hydrophobic polyester film. According to the preparation method, the fluorine-containing polyester is obtained by adding a small amount of the fluorine-containing polymer and polymerizing, fluorine atoms are introduced into chain segments, the surface energy of the polyester is reduced, and the hydrophobicity of the polyester is improved; the prepared polyester film has excellent super-hydrophobicperformance, agglomeration is not easily caused after blending of super-hydrophobic SiO2 nano particles and polyester, and the added lubricating modifier can play a role in keeping the super-hydrophobic effect for a longer time. The prepared super-hydrophobic polyester film has the advantages of being excellent in performance, simple in process, easy to realize industrial production and the like,can be used for water prevention and stain prevention of film outer packing products, and can also be used in the field of stain prevention and bacteria prevention of medical film products.

Description

technical field [0001] The invention relates to a superhydrophobic film, in particular to a preparation method of a superhydrophobic polyester film. Background technique [0002] Generally, the surface with a contact angle with water greater than 90° is called a hydrophobic surface, while the surface with a contact angle with water greater than 150° is called a superhydrophobic surface. The special wettability of superhydrophobic surface makes it have excellent properties such as self-cleaning, anti-adhesion, antifouling, antibacterial, and waterproof, which has attracted great attention and research interest. Polyester film is an engineering plastic film widely used in daily life and industrial production. It has excellent properties such as transparency, chemical corrosion resistance and toughness. If it can be endowed with superhydrophobic self-cleaning properties, it can have a wider Application prospect. [0003] At present, the traditional superhydrophobic treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L91/06C08L23/06C08K5/20C08K3/36C08J5/18C08G63/682
CPCC08G63/6826C08J5/18C08J2367/02C08J2423/06C08J2491/06C08K3/36C08K5/20C08K2201/011
Inventor 周倩戴志彬夏峰伟常玉
Owner CHINA PETROLEUM & CHEM CORP
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