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Triptycene polyimide separation film

A technique of pterylene-based polyimide and separation membrane, which is applied in separation methods, semi-permeable membrane separation, and dispersed particle separation to achieve the effects of reducing affinity and adsorption, improving long-term stability and improving stability.

Active Publication Date: 2018-10-09
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, triptycene-based polymers, which are prepared by chemical dehydration to prepare polyimides and used in the preparation of separation membranes, have not yet been patented.

Method used

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  • Triptycene polyimide separation film
  • Triptycene polyimide separation film
  • Triptycene polyimide separation film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 0.45g (1.5mmol) of 2,6,14-triaminotriptycene, put it into a 250ml flask, keep the temperature in an ice bath at about 0°C, then add 50ml of dimethylformamide to stir and dissolve, and add it in the form of powder 1.0 g (2.25 mmol) of hexafluorodianhydride was stirred and reacted for 6 hours under nitrogen protection. The ice bath was removed, 10 ml of acetic anhydride and 6 ml of pyridine were added thereto, and the reaction was stirred for 24 hours under nitrogen protection. After the reaction, configure 1L of methanol aqueous solution with a volume ratio of 1:1, pour the reaction product into the methanol aqueous solution, stir vigorously for 10 minutes, filter with suction, and dry the filter cake under vacuum at 50°C to obtain 0.9232g of Phenyl polyimide polymer.

[0040] Its structure is via 1 H-NMR and 1 C-NMR characterization confirmation, 1 H-NMR (500MHz, DMSO), δ=7.80-8.00ppm is the characteristic absorption peak of the H atom on the benzene ring of he...

Embodiment 2

[0044] Take 0.4g (1.34mmol) of 2,6,14-triaminotriptycene, put it into a 250ml flask, keep the temperature in an ice bath at about 0°C, then add 40ml of methylpyrrolidone to stir and dissolve, and add 0.52g in powder form (1.68mmol) 4,4'-biphenyl ether dianhydride, stirred and reacted for 8 hours under the protection of nitrogen. The ice bath was removed, 8 ml of acetic anhydride and 8 ml of triethylamine were added thereto, and the reaction was stirred for 24 hours under nitrogen protection. After the reaction, configure 1 L of methanol aqueous solution with a volume ratio of 1:1, pour the reaction product into the methanol aqueous solution, stir vigorously for 12 minutes, filter with suction, and dry the filter cake under vacuum at 60°C to obtain 0.6760 g of Phenyl polyimide polymer.

[0045] Its structure is via 1 H-NMR and 1 Confirmation by C-NMR characterization. 1 H-NMR (500 MHz, DMSO). δ=7.80-7.90ppm is the characteristic absorption peak of the H atom on the benzene...

Embodiment 3

[0049] Take 0.38g (1.27mmol) of 2,6,14-triaminotriptycene, put it into a 250ml flask, keep the temperature in an ice bath at about 0°C, then add 35ml of dimethylacetamide to stir and dissolve, and add it in the form of powder 0.5 g (1.55 mmol) of 3,3',4,4'-benzophenone tetracarboxylic dianhydride was stirred and reacted for 5 hours under nitrogen protection. The ice bath was removed, 6ml of acetic anhydride and 15ml of pyridine were added thereto, and the reaction was stirred for 36 hours under the protection of nitrogen. After the reaction, the reaction product was poured into methanol, vigorously stirred for 15 minutes, filtered with suction, and the filter cake was dried under vacuum at 70° C. to obtain 0.6120 g of triptyl polyimide polymer.

[0050] Its structure is via 1 H-NMR and 1 Confirmation by C-NMR characterization. 1 H-NMR (500 MHz, DMSO). δ=8.10-8.20ppm is the characteristic absorption peak of the H atom on the benzene ring of 3,3',4,4'-benzophenonetetracarbox...

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Abstract

The invention discloses a triptycene polyimide separation film, wherein a preparation method of the film is as follows: dissolving a triptycene compound having an active group and a dianhydride compound into a non-protonic solvent to perform a polymerization reaction, conducting imidization; pouring a polymer solution obtained through the reaction into a precipitation solution, stirring intensely,implementing suction filtration, washing, drying to obtain a triptycene polyimide powder; dissolving the triptycene polyimide into the solve to prepare a casting solution, coating the casting solution on a support body and drying to obtain the triptycene polyimide separation film. The triptycene polyimide separation film solves the problem of the insolubility characteristic of a polyimide polymer, and overcomes the limitations in the application of the separation film; meanwhile, the good thermal stability, the good chemical stability and the good mechanical property of the polyimide materialare combined, and the prepared film material is better in long-term stability.

Description

[0001] This application is a divisional application for an invention patent with the filing date: May 03, 2018, the application number: 2018104124482, and the name: a method for preparing a triptylenyl polyimide separation membrane. technical field [0002] The invention relates to a triptycene-based polyimide separation membrane, which belongs to polymer membrane preparation technology and is suitable for separating mixtures of volatile organic compounds and air, such as in the field of oil and gas recovery. Background technique [0003] Volatile organic compounds are a class of substances with high volatility. Leakage will inevitably occur during its use, which will cause a large amount of volatile organic waste gas to be discharged into the atmosphere, affecting people's physical and mental health and polluting the environment. To this end, the country has promulgated various laws and regulations to control the emission concentration of volatile organic compounds, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/64B01D69/10B01D67/00B01D53/22
CPCB01D53/228B01D67/0011B01D69/10B01D71/64B01D2257/708
Inventor 周浩力戴山寅金万勤
Owner NANJING TECH UNIV
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