A kind of preparation method and application of polyimide film containing binaphthyl structure

A polyimide film, polyimide resin technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve problems such as low efficiency, cumbersome process, and increased product cost.

Active Publication Date: 2021-08-03
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process not only consumes a lot of energy, but also is cumbersome and inefficient, which increases the cost of the product

Method used

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  • A kind of preparation method and application of polyimide film containing binaphthyl structure
  • A kind of preparation method and application of polyimide film containing binaphthyl structure
  • A kind of preparation method and application of polyimide film containing binaphthyl structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 0.62 mL of concentrated nitric acid was added dropwise into the acetic acid solution in which 1.0 g of 1,1'-bi-2-naphthol was dissolved, and stirring was continued at room temperature for 1 hour. The mixture was then poured into ice water and the solid was collected by filtration. Then the obtained solid and 10% Pd / C catalyst were added into N,N-dimethylformamide solvent, and reacted with magnetic stirring in 2 bar hydrogen atmosphere at room temperature for 24 hours. After filtering through diatomaceous earth, the filtrate was poured into deionized water for sedimentation to obtain biphenyldiamine monomer. Under an ice-water bath, put 1.26mmol of biphenyldiamine monomer, 1.28mmol of hexafluorodianhydride and 4.0mL of N,N-dimethylacetamide into a three-necked flask, and magnetically stir evenly. Continue stirring at 40° C. for 4 hours, and then add 3 mL of triethylamine and 3 mL of acid anhydride to react at room temperature for 24 hours. After the reaction, the solid...

Embodiment 2

[0025] 0.62 mL of concentrated nitric acid was added dropwise into the acetic acid solution in which 1.0 g of 1,1'-bi-2-naphthol was dissolved, and stirring was continued at room temperature for 1 hour. The mixture was then poured into ice water and the solid was collected by filtration. Then the obtained solid and 10% Pd / C catalyst were added into N,N dimethylformamide solvent, and reacted with magnetic stirring in 2 bar hydrogen atmosphere at room temperature for 24 hours. After filtering through diatomaceous earth, the filtrate was poured into deionized water for sedimentation to obtain biphenyldiamine monomer. Under an ice-water bath, put 1.26mnol of biphenyldiamine monomer, 1.28mmol of 3,3',4,4'-benzophenone tetra-acid dianhydride and 4.0mL of N,N-dimethylacetamide into a three-necked flask , magnetic stirring evenly. Continue stirring at 40° C. for 4 hours, and then add 3 mL of triethylamine and 3 mL of acid anhydride to react at room temperature for 24 hours. After t...

Embodiment 3

[0027]0.62 mL of concentrated nitric acid was added dropwise into the acetic acid solution in which 1.0 g of 1,1'-bi-2-naphthol was dissolved, and stirring was continued at room temperature for 1 hour. The mixture was then poured into ice water and the solid was collected by filtration. Then, the obtained solid and 10% Pd / C catalyst were added into N,N dimethylformamide solvent, and the reaction was carried out under magnetic stirring in 2 bar hydrogen atmosphere at room temperature for 24 hours. After filtering through diatomaceous earth, the filtrate was poured into deionized water for sedimentation to obtain biphenyldiamine monomer. Under an ice-water bath, put 1.26mnol of biphenyldiamine monomer, 1.28mmol of 4,4'-biphenyl ether dianhydride and 4.0mL of dimethylacetamide into a three-necked flask, and magnetically stir evenly. Continue stirring at 40° C. for 4 hours, and then add 3 mL of triethylamine and 3 mL of acid anhydride to react at room temperature for 24 hours. A...

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Abstract

The invention discloses a preparation method and application of a polyimide film containing a binaphthyl structure, which is used for O 2 / N 2 , CO 2 / N 2 separate. The polyimide separation membrane uses binaphthylamine monomers and dianhydrides with different side group functional groups to synthesize polyimide resin films. The polyimide resin films have the characteristics of high gas permeation and high selectivity: at 0.8 Under the working pressure of MPa, for O 2 The transmission coefficient exceeds 300barrer, CO 2 The transmission efficiency exceeds 800barrer; the transmission coefficient for nitrogen is lower than 25barrer; O 2 / N 2 The selectivity coefficient exceeds 13 for CO 2 / N 2 The selectivity coefficient is over 68. The polyimide film exhibits excellent heat resistance (over 500° C.) and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and designs a preparation method and application of a polyimide gas separation film resistant to high temperature and organic solvent, and the prepared gas separation film is suitable for CO in industrial waste gas. 2 Recovery of gases, O of co-combustion air 2 Thin film enrichment and other fields. Background technique [0002] The energy crisis forces high-energy-consuming industries to abandon the original extensive production methods and move closer to more efficient energy-saving models. The treatment of industrial waste gas and tail gas not only includes the removal of soot particles and acid gases, but also the reduction of greenhouse gas emissions is an important step in industrial production as environmental protection requirements become more stringent. The traditional process generally purifies the exhaust gas layer by layer through catalytic combustion combined with activa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/40B01D67/00B01D46/54C08G73/10
Inventor 邓国雄王一雷薛松
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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