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A kind of triptyl vocs cut-off type polymer separation membrane and preparation method thereof

A triptycene and separation membrane technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of limited use, high energy consumption, and cannot be used alone.

Active Publication Date: 2017-10-13
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preferentially permeable organic membrane cannot be used alone during use, and must be used together with other equipment such as vacuum pumps, resulting in complex equipment and high energy consumption.
At the same time, volatile organic compounds will swell the rubbery polymer membrane, thereby affecting the further improvement of its separation performance, which limits its wide use to a certain extent.

Method used

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  • A kind of triptyl vocs cut-off type polymer separation membrane and preparation method thereof
  • A kind of triptyl vocs cut-off type polymer separation membrane and preparation method thereof
  • A kind of triptyl vocs cut-off type polymer separation membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The specific embodiment of the present invention uses 2,3-diaminotriptycene and sebacoyl chloride as the main monomers for synthesis, triethylamine as the acid-binding agent, and dimethylformamide as the solvent for the synthesis reaction. The specific steps are as follows: Add 1 mol of 2,3-diaminotriptycene, 3.5 mol of triethylamine, and 2.5 mol of sebacoyl chloride into the dimethylformamide solution and stir to dissolve, at a temperature of 2°C (nitrogen protection), After reacting for 3 hours, the homogeneous polycondensation mixed solution of the reaction was coated on the polytetrafluoroethylene base film to prepare a composite film, and the coated composite film was dried in a vacuum oven at 70°C to obtain triptycene-based VOCs interception polymerization material separation membrane.

[0059] Digital photo of PTFE backing film figure 1 As shown, the digital photo of triptycene-based VOCs interception polymer separation membrane figure 2 As shown, the SEM imag...

Embodiment 2

[0063] The specific embodiment of the present invention uses 2,6-dihydroxytriptycene and sebacoyl chloride as the main monomers for synthesis, triethylamine as the acid-binding agent, and dichloromethane as the solvent for the synthesis reaction. The specific steps are as follows: 1mol Add 2,3-diaminotriptycene, 4 mol of triethylamine, and 2.5 mol of sebacoyl chloride into the dimethylformamide solution, stir and dissolve, and react for 3.5 hours at a temperature of 2°C (nitrogen protection). , the homogeneous polycondensation mixed solution of the reaction is coated on the polytetrafluoroethylene base film to prepare a composite film, and the coated composite film is dried in a vacuum oven at 70°C to obtain a triptycene-based VOCs interception polymer separation membrane. The average pore diameter of the triptyl VOCs intercepting polymer separation membrane prepared in Example 2 by BET test was 3.4 nm.

[0064] The test conditions are: at 25°C, nitrogen / cyclohexane is used a...

Embodiment 3

[0066] The specific embodiment of the present invention uses 2,6,14-triaminotriptycene and sebacoyl chloride as the main monomers for synthesis, pyridine as the acid-binding agent, and methylpyrrolidone as the solvent for the synthesis reaction. The specific steps are as follows: 1mol Add 2,6,14-triaminotriptycene, 3mol of pyridine, and 2mol of sebacoyl chloride into the methylpyrrolidone solution and stir to dissolve, and react for 3.5h at a temperature of 2°C (nitrogen protection). The homogeneous polycondensation mixed solution was coated on the polytetrafluoroethylene base film to prepare a composite membrane, and the coated composite membrane was dried in a vacuum oven at 70°C to obtain a triptycene-based VOCs interception polymer separation membrane. The average pore diameter of the triptyl VOCs intercepting polymer separation membrane prepared in Example 3 by BET test was 2.8 nm.

[0067] The test conditions are: at 25°C, nitrogen / cyclohexane is used as the separation r...

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Abstract

The invention discloses a triptycene-based VOCs (volatile organic chemicals) retained type polymer separating membrane and a preparation method thereof and relates to a gas separating membrane and a preparation method thereof. According to the preparation method of the separating membrane, a compound shown in a formula I and a compound containing active groups are taken as monomers and have a polymerization reaction for 0.5-60 h under the action of an acid-binding agent, and a membrane solution is obtained after the reaction ends; a solvent resistance basement membrane is coated with the obtained membrane solution, vacuum crosslinking drying is performed, and the triptycene-based VOCs retained type polymer separating membrane is obtained. The preparation method of the triptycene-based VOCs retained type polymer separating membrane is simple, and the prepared separating membrane can be independently used, has a good separation effect and has solvent resistance and higher separating stability.

Description

technical field [0001] The invention belongs to the field of polymer membranes, in particular to a gas separation membrane and a preparation method thereof, more specifically to a triptycene-based VOCs interception polymer separation membrane and a preparation method thereof. Background technique [0002] 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 "Comprehensive Emission Standards of Air Pollutants". In order to meet the national emission requirements, researchers have developed a variety of technologies, such as using adsorption, absorption, condensation, membrane separation, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/56B01D67/00C08G69/26
CPCB01D67/0006B01D71/56C08G69/26
Inventor 周浩力吕磊金万勤
Owner NANJING TECH UNIV
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