Confined conjugated microporous polymer composite membrane as well as preparation method and application thereof

A conjugated microporous and polymer technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of low separation accuracy, low solvent flux, insufficient swelling resistance, etc., and achieve enhanced penetration Effects of flux, avoidance of brittleness, good chemical stability and dimensional stability

Pending Publication Date: 2022-05-24
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solvent-resistant membrane materials are the core of OSN technology. The challenges of OSN membranes, such as small solvent flux, low separation precision, and insufficient swelling resistance, are known as technical problems in the engineering field.

Method used

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  • Confined conjugated microporous polymer composite membrane as well as preparation method and application thereof
  • Confined conjugated microporous polymer composite membrane as well as preparation method and application thereof
  • Confined conjugated microporous polymer composite membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The preparation method of a confinement conjugated microporous polymer composite membrane of the present embodiment, the specific steps are as follows:

[0050] First, 16.2 mg of 1,4-diacetophenone reaction monomer (CAS No.: 1009-61-6, FW: 162.19) was weighed and dissolved in 2 mL of toluene solution. After it was completely dissolved, 0.5 mL of trifluoro trifluoride was added quickly. Methanesulfonic acid, mix well, transfer the obtained mixed reaction solution to a muffle furnace, heat it to 100 ° C for 26 hours, and prepolymerize to form a prepolymerized solution with a certain viscosity; then drop the prepolymerized solution with a certain viscosity while hot. On the polymer base film (PTFE), the prepolymer solution is evenly distributed on the surface of the base film by shaking with a shaker; after the prepolymer solution is formed, it is placed in an oven at 100 ° C for thermal curing for 24 hours. Secondary Polymerization reaction; after the conjugated microporo...

Embodiment 2

[0062] The preparation method of a confinement conjugated microporous polymer composite membrane of the present embodiment, the specific steps are as follows:

[0063] First, 20.4 mg of 1,3,5-triacetophenone reaction monomer (CAS No.: 779-90-8, FW: 204.22) was weighed and dissolved in 2 mL of N,N-dimethylacetamide solution. After complete dissolution, 1 mL of trifluoromethanesulfonic acid was quickly added and mixed well; the obtained mixed reaction solution was transferred to a muffle furnace, heated to 100 °C for 20 hours, and a prepolymerization reaction occurred to form a prepolymerized solution with a certain viscosity; The viscous prepolymer droplets are coated on the polymer base film (PVDF), and the prepolymer solution is evenly distributed on the surface of the base film by shaking with a shaker; after the prepolymer solution is formed, it is placed in an oven at 100 °C. After thermal curing for 36h, a secondary polymerization reaction occurred; after the conjugated m...

Embodiment 3

[0067] The preparation method of a confinement conjugated microporous polymer composite membrane of the present embodiment, the specific steps are as follows:

[0068] First, 8.1 mg of 1,4-diacetophenone and 10.2 mg of 1,3,5-triacetophenone were weighed and dissolved in 2 mL of N,N-dimethylacetamide solution. After they were completely dissolved, 3 mL was added quickly. The obtained mixed reaction solution was transferred to an oven, heated to 100°C for 30 hours, and prepolymerized to form a prepolymerized solution with a certain viscosity; then the prepolymerized solution with viscosity was applied to the polymer On the basement film (PAN), and shake the prepolymer solution evenly on the surface of the basement membrane by shaking it; after the prepolymerization solution is formed, it is placed in an oven at 120 ° C for thermal curing for 48h, and a secondary polymerization reaction occurs; After the membrane is formed, the membrane is sequentially washed three times in an aq...

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Abstract

The invention discloses a confined conjugated microporous polymer composite membrane as well as a preparation method and application thereof, and belongs to the technical field of membrane preparation and membrane separation. The composite membrane is obtained through acetyl cyclotrimerization'two-stage method 'reaction, specifically, reaction monomers are dissolved in an organic solvent, pre-polymerization liquid is firstly formed under the acid catalysis effect, then the surface of a high-molecular polymer substrate membrane is modified with the pre-polymerization liquid, and the composite membrane is obtained through thermocuring. The confinement conjugated microporous polymer composite membrane prepared by the method is directly flaky, is high in yield, can be prepared in a large scale, and is beneficial to industrial production. Moreover, a confinement polymerization reaction is carried out on a basement membrane containing a large number of micropores, only the micropores are polymerized to form the membrane, and a main body part is supported by polymer fibers, so that the permeation flux (152.8 L m <-2 > h <-1 > bar <-1 >, which is one order of magnitude higher than that of the existing CMP membrane) is enhanced, and the flexibility of the membrane is obviously improved; and the defects of fragility and fragility caused by a rigid structure of the CMP film are avoided.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation and membrane separation, and in particular relates to a confined conjugated microporous polymer composite membrane and a preparation method and application thereof. Background technique [0002] Organic Solvent Nanofiltration (OSN) technology has shown great application potential in the process of material separation, drug concentration and purification, solvent and catalyst recovery in chemical and pharmaceutical industries, and can greatly reduce energy consumption and carbon emissions in the separation process. It is becoming one of the research hotspots of membrane technology. Solvent-resistant membrane materials are the core of OSN technology, and the challenges of OSN membranes such as low solvent flux, low separation accuracy, and insufficient swelling resistance are called technical problems in the engineering field. Conjugated microporous polymer (CMP) membranes have the adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/16C08L27/18C08L27/16C08L33/20C08L25/06C08L27/06B01D61/02B01D67/00B01D69/12
CPCC08J7/16B01D61/027B01D67/0006B01D69/12C08J2327/18C08J2465/00C08J2327/16C08J2333/20C08J2325/06C08J2327/06Y02P20/584
Inventor 黎明苏倩文王银莹文菊
Owner HUBEI UNIV
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