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Polyimide material and solvent-free preparation method and application thereof

A polyimide and reactor technology, applied in the field of polymer preparation, can solve the problems of difficulty in cleaning, adverse effects on the electrochemical performance of batteries, generation of recovery costs, etc., so as to reduce production costs, reduce the use of solvents, avoid residual effect

Pending Publication Date: 2020-04-10
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the traditional synthesis of such materials, organic solvents are required to act as reaction media, resulting in additional costs
Moreover, after the solvent is used, it will become a waste liquid to generate waste liquid treatment costs, or through recycling and reuse, resulting in recycling costs
In addition, the solvents used in the synthesis are usually high-boiling polar organic solvents, which will cause residual high-boiling polar solvents in the material pores of the final product, which are difficult to clean and adversely affect the electrochemical performance of the battery.

Method used

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  • Polyimide material and solvent-free preparation method and application thereof
  • Polyimide material and solvent-free preparation method and application thereof
  • Polyimide material and solvent-free preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] The preparation of embodiment 1 polyimide

[0101] Step A: Add the reactants 1,4,5,8-naphthalene tetracarboxylic dianhydride and ethylenediamine into the reactor at a molar ratio of 1:1, and the reaction vessel is a glass flask. The reactant was kept at 90° C. for 2 hours under the protection of argon, then raised to 150° C., and reacted at this temperature for 4 hours.

[0102] Step B: collect the product in step A, and keep it at 200° C. under vacuum for 24 hours to obtain a dry powder, which is designated as polyimide sample 1.

Embodiment 2

[0104] It is basically the same as Example 1, except that in the fixed bed reactor, the reactant is directly heated to 150° C., and reacted at this temperature for 10 hours, and the obtained product is recorded as polyimide sample 2.

Embodiment 3

[0106] It is basically the same as in Example 1, except that 1,4,5,8-naphthalene tetracarboxylic dianhydride is replaced by 1,2,4,5-cyclohexanetetracarboxylic dianhydride, and the obtained product is marked as polyimide sample 3.

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Abstract

The invention discloses a polyimide material and a solvent-free preparation method and application thereof, belonging to the field of polymer preparation. The method comprises the following steps of:reacting a compound as shown in a formula I and a compound shown as shown in a formula II at a temperature of 120 and 180 DEG C for 3 to 6 hours in an inactive atmosphere, and continuing the reactionfor at least 16 hours at a temperature of 200 and 250 DEG C under an inactive condition to obtain the polyimide material as shown in a formula III, wherein the non-active condition comprises vacuum ornon-active atmosphere. According to the method, the use of a solvent in the reaction can be reduced, production cost is greatly reduced, the method is environment-friendly, and the purity of a finalproduct is improved.

Description

technical field [0001] The application relates to a polyimide material and its preparation method and application, belonging to the field of polymer preparation. Background technique [0002] The long-term maintenance of coal-based energy consumption structure has caused a series of problems such as serious environmental pollution, large total carbon emissions, and low energy efficiency. As a result, the global average temperature has continued to rise for more than 130 years. The sustainable development of the economy and society brings enormous pressure, and the energy supply structure must be optimized and adjusted. The development of new energy is the only way to adjust the energy structure strategy, ensure energy security, protect the ecological environment, respond to climate change, and fulfill international commitments. At present, electrochemical energy storage technology has gradually been recognized by the new energy industry because of its high energy conversion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10H01M4/02H01M4/60H01M10/36
CPCC08G73/1082C08G73/1007H01M4/608H01M4/02H01M10/36H01M2004/028Y02E60/10
Inventor 李忆非吴志连李书顶张旭锋王敏刚王耀国
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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