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Porous polymer film as well as preparation method and application thereof

A technology of porous polymers and polymer films, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve problems such as limiting the selection of membrane raw materials and the expansion of applications, and achieve good permeability, complete structure, The effect of mild reaction conditions

Active Publication Date: 2021-10-12
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned complex membrane preparation methods limit the selection of membrane raw materials and the expansion of their applications. Therefore, the use of simple and easy methods to prepare more organic porous membranes that can be processed and formed has become the research basis and direction for expanding their application scenarios.

Method used

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  • Porous polymer film as well as preparation method and application thereof
  • Porous polymer film as well as preparation method and application thereof
  • Porous polymer film as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0056] The present embodiment provides a kind of porous polymer film, the preparation method of described porous polymer film is as follows (such as figure 1 shown):

[0057] (1) Add 200 mg of poly(N-vinylcarbazole) powder to 4 mL of anhydrous chloroform, and magnetically stir for 1 h at room temperature until the polymer solution is completely dissolved; pour 4 mL of the polymer solution into a polytetrafluoroethylene mold (groove long 5cm wide 5cm deep 0.5cm), cover glass watch glass, make solvent volatilize slowly at room temperature, obtain uniform and complete poly(N-vinyl carbazole) film;

[0058] (2) Cut the poly(N-vinylcarbazole) film into a suitable size with a punch or scissors, and add it to FeCl 3 (445mg) in dichloroethane (20mL) suspension, after reacting at room temperature for 24h, add methanol 20mL to terminate the reaction;

[0059] (3) Repeated gentle washing with methanol, deionized water, and 1mol / L dilute hydrochloric acid respectively to remove unreacte...

Embodiment 2

[0066] The present embodiment provides a kind of porous polymer film, the preparation method of described porous polymer film is as follows (such as figure 1 shown):

[0067] (1) Add 300 mg of poly(N-vinylcarbazole) powder to 6 mL of anhydrous chloroform, and stir magnetically for 2 h at room temperature until the polymer solution is completely dissolved; pour 4 mL of the polymer solution into a polytetrafluoroethylene mold (groove long 5cm wide 5cm deep 0.5cm), cover glass watch glass, make solvent volatilize slowly at room temperature, obtain uniform and complete poly(N-vinyl carbazole) film;

[0068] (2) Cut the poly(N-vinylcarbazole) film into a suitable size with a punch or scissors, and add 200mg of the poly(N-vinylcarbazole) film to FeCl 3 (445mg) in dichloroethane (20mL) suspension, then add 1.1mL dimethanol formal (FDA), after reacting at 80°C for 24h, add methanol 20mL to terminate the reaction;

[0069] (3) Repeated mild washing with methanol, deionized water, and...

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Abstract

The invention relates to a porous thin film, in particular to a porous polymer thin film as well as a preparation method and application thereof. The preparation method of the porous polymer film comprises the following steps: carrying out in-situ chemical reaction by taking a linear polymer containing carbazolyl as a raw material; wherein the in-situ chemical reaction is an oxidative coupling reaction or a Friedel-Crafts reaction. The porous polymer film prepared by the preparation method is relatively high in specific surface area, complete in structure, and good in reachability of pore channels and permeability of the film. A linear polymer containing carbazolyl is selected as a raw material, and the porous polymer film is prepared through an in-situ chemical reaction; a noble metal catalyst is not needed, and the used oxidant and catalyst are low in price; a pore-forming agent, a substrate or a filler does not need to be additionally added; the reaction conditions are mild, the efficiency is high, and the operation is simple; the porous polymer film can be applied to the fields of carbon dioxide adsorption, separation of organic pollutants in water and the like.

Description

technical field [0001] The invention relates to a porous film, in particular to a porous polymer film and its preparation method and application. Background technique [0002] In the case of rapid industrial development and increasingly serious environmental pollution, it is particularly important to reduce energy consumption to achieve separation and purification of substances. Important industrial separation processes include oil extraction from crude oil, separation of alkane and olefin mixtures, extraction of uranium from seawater, capture of greenhouse gases, post-treatment of industrially polluted wastewater, etc. Separation is best achieved by methods with low energy consumption, so the development and application of membrane materials is the primary The focus of research for those skilled in the field. [0003] For dense polymer membranes, the separation of substances is achieved by utilizing the different dissolution and diffusion rates of molecules in the mixed sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/58B01D67/00B01D53/22C02F1/44C02F101/30
CPCB01D71/58C02F1/44B01D67/0002B01D53/228B01D2257/504C02F2101/30Y02C20/40
Inventor 韩宝航宋甘霖
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA