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A kind of preparation method of polyimide/graphene nanoribbon composite film

A graphene nanoribbon and polyimide technology, which is applied in the field of preparing water-soluble polyimide, can solve the problems of carbon nanotubes and graphene not being uniformly dispersed, limited, and high conductivity of the composite film, and achieve good insulation performance , excellent mechanical properties, low dielectric constant effect

Active Publication Date: 2018-03-27
大同共聚西安科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing carbon nanotubes and graphene cannot be uniformly dispersed in the polyimide matrix, the prepared composite film has high conductivity, and the application to the field of electrical insulation is limited, and provides a polyimide Preparation method of imide / graphene nanoribbon composite film

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  • A kind of preparation method of polyimide/graphene nanoribbon composite film
  • A kind of preparation method of polyimide/graphene nanoribbon composite film
  • A kind of preparation method of polyimide/graphene nanoribbon composite film

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specific Embodiment approach 1

[0033] Specific embodiment one: present embodiment is a kind of preparation method of polyimide / graphene nanoribbon composite film and is finished according to the following steps:

[0034] A kind of preparation method of polyimide / graphene nanoribbon composite film is to finish according to the following steps:

[0035] 1. Preparation of water-soluble polyimide:

[0036] ①. Preparation of polyamic acid solution:

[0037] Add 4,4'-diaminodiphenyl ether into the organic solvent, then stir and react at a stirring speed of 100r / min to 300r / min for 60min, and then sonicate at an ultrasonic power of 300W for 6h to 12h to obtain a diamine solution ; Add the dianhydride to the diamine solution in 5 times under the conditions of an ice-water bath and a stirring speed of 100r / min to obtain a viscous polyamic acid solution;

[0038] The volume ratio of the mass of 4,4'-diaminodiphenyl ether described in step ① to the organic solvent is 3g: (40mL~60mL);

[0039] Step 1. The organic so...

specific Embodiment approach 2

[0059] Embodiment 2: The difference between this embodiment and Embodiment 1 is: the centrifugal speed of each centrifugal cleaning described in step 1 ② is 6000r / min-8000r / min, and the time of each centrifugation is 10min-20min. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0060] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the weakly basic reagent described in Step 1② is triethanolamine, tripropylamine or triethylamine. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for preparing water-soluble polyimide and a method for preparing a composite film, in particular to a preparation method of a polyimide / graphene nanoribbon composite film. The preparation method aims at solving the problems that existing carbon nanotubes and graphene can not be uniformly dispersed in a polyimide matrix, a prepared composite film has high electroconductibility, and application of the prepared composite film to the field of electrical insulation is limited. The preparation method includes the steps that firstly, water-soluble polyimide is prepared; secondly, a graphene nanoribbon solution is prepared; thirdly, a composite film is prepared, and the polyimide / graphene nanoribbon composite film is obtained. The prepared polyimide / graphene nanoribbon composite film has a good insulating property, a low dielectric constant and high and excellent mechanical properties, which is of great promoting significance in expanding the wide industrial application prospects of a polyimide-based composite. The polyimide / graphene nanoribbon composite film can be obtained through the preparation method.

Description

technical field [0001] The invention relates to a method for preparing water-soluble polyimide and a method for preparing a composite film. Background technique [0002] Polyimide is a high heat-resistant insulating polymer material containing imide rings. It also has good mechanical properties, high electrical insulation properties, excellent chemical stability, and strong radiation resistance. With the rapid development of power electronics, aerospace, and flexible electronics industries, this polyimide polymer material, which is considered to be a "problem-solving expert", has developed rapidly in industry, and it has been widely used in variable frequency motors. In military industry, aerospace, microelectronics, nano-liquid crystal, separation membrane and other fields, in order to meet the diverse application requirements, various polyimide-based composite materials have attracted extensive attention from the industry and scholars, and are currently being studied Most...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K3/04C08J5/18C08G73/10
CPCC08G73/1071C08J5/18C08J2379/08C08K3/04C08K2201/011C08L2203/16C08L79/08
Inventor 刘晓旭张增凤孙晓楠
Owner 大同共聚西安科技有限公司
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