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A preparation method of self-assembled high thermal conductivity and antistatic polyester porous film

A porous film, high thermal conductivity technology, applied in the direction of conductive coatings, polyester coatings, heat exchange materials, etc., can solve the problems that affect the thermal conductivity/antistatic performance of composite materials, agglomeration, etc., to achieve low cost, small pollution, and reduce The effect of interfacial thermal resistance

Active Publication Date: 2021-02-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods for preparing polymer-based graphene composites mainly include solution blending and melt blending, but when graphene is added to polymers by these two methods, severe agglomeration is prone to occur, thereby Will affect the thermal conductivity / antistatic properties of composite materials

Method used

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  • A preparation method of self-assembled high thermal conductivity and antistatic polyester porous film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present embodiment prepares polyester porous membrane according to the following steps:

[0025] (1) Add 1g of PET pellets to 10g of a mixed solvent made of phenol and trichloroethane at a mass ratio of 1:0.7, and stir at 110°C until the PET pellets dissolve to obtain a casting solution , and then use a film wiper to prepare a film to obtain a PET porous film;

[0026] (2) Slowly add 1g of graphene to a mixed solution of 5mL of concentrated sulfuric acid, 1.6g of potassium persulfate and 1.6g of phosphorus pentoxide, and after stirring for 1 hour at room temperature, slowly add 150mL of Ionized water, after dripping, insulate and react in an ice-water bath for 5 hours; after the reaction, vacuum filter the reaction solution, wash the obtained solid product with distilled water and ethanol until neutral, and then freeze-dry to obtain graphene oxide;

[0027] (3) Add 0.3 g of PBT to a mixed solvent composed of phenol and trichloroethane at a mass ratio of 1:0.7, and ...

Embodiment 2

[0030] The present embodiment prepares polyester porous membrane according to the following steps:

[0031] (1) Add 1.5g of PET pellets to 10g of a mixed solvent made of phenol and tetrachloroethane in a mass ratio of 1:1, and stir at 110°C until the PET pellets are dissolved to obtain a cast film liquid, and then use a film wiper to prepare a film to obtain a PET porous film;

[0032] (2) Slowly add 1g of graphene to a mixed solution of 10mL of concentrated sulfuric acid, 3.2g of potassium persulfate and 3.2g of phosphorus pentoxide, stir and react at room temperature for 2h, then slowly add 300mL of Ionized water, after dripping, insulate and react in an ice-water bath for 5 hours; after the reaction, vacuum filter the reaction solution, wash the obtained solid product with distilled water and ethanol until neutral, and then freeze-dry to obtain graphene oxide;

[0033] (3) Add 1 g of PC to a mixed solvent composed of phenol and tetrachloroethane at a mass ratio of 1:1, and...

Embodiment 3

[0036] The present embodiment prepares polyester porous membrane according to the following steps:

[0037] (1) Add 2.0g of PET pellets to 10g of a mixed solvent made of phenol and chloroform at a mass ratio of 1:1.3, and stir at 120°C until the PET pellets dissolve to obtain a casting solution , and then use a film wiper to prepare a film to obtain a PET porous film;

[0038] (2) Slowly add 2g of graphene to a mixed solution of 10mL of concentrated sulfuric acid, 3.2g of potassium persulfate and 3.2g of phosphorus pentoxide, stir and react at room temperature for 1h, then slowly add 300mL of Ionized water, after dripping, insulate and react in an ice-water bath for 4 hours; after the reaction, vacuum filter the reaction solution, wash the obtained solid product with distilled water and ethanol until neutral, and then freeze-dry to obtain graphene oxide;

[0039] (3) Add 0.5g of PTT to the mixed solvent made of phenol and chloroform according to the mass ratio of 1:1.3, and s...

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Abstract

The invention discloses a method for preparing a self-assembled high thermal conductivity and antistatic polyester porous film. The PET porous film is firstly prepared by a thermally induced phase separation method, and then graphene oxide is prepared by an improved Hummers method, and finally by a self-assembled The method is to attach graphene oxide on the PET porous membrane to obtain the product. The invention adopts the method of self-assembly to stably attach the graphene oxide on the surface of the membrane and the inside of the pores of the membrane, and the prepared porous membrane has better thermal conductivity and antistatic performance.

Description

technical field [0001] The invention relates to a method for preparing a porous film, in particular to a method for preparing a high thermal conductivity and antistatic polyester porous film by using a self-assembly method. Background technique [0002] Polytrimethylene terephthalate (PET) is a thermoplastic resin with good mechanical properties, optical properties, chemical corrosion resistance and a wide temperature range. It is widely used in engineering plastics, packaging, films and other fields, especially It is widely used in the field of polyester film, but the characteristics of PET's non-thermal conductivity and easy to generate static electricity limit its use to a certain extent. [0003] Graphene is an inorganic filler with a two-dimensional sheet structure, which has extremely high thermal conductivity, electrical conductivity, ultra-high mechanical strength and large specific surface area. The thermal conductivity of single-layer graphene at room temperature i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J7/04C08J7/044C09D167/02C09D7/62C09D5/24C09K5/14C08L67/02
CPCC08J5/18C08J7/042C08J2367/02C08J2467/02C09K5/14
Inventor 耿加露王晓杰李彬董帅吴晅王彩萍
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI