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Poly-3, 4-ethylenedioxythiophene modified film, preparation method and application thereof

A technology of ethylenedioxythiophene and polyvinylidene fluoride, which is applied in chemical instruments and methods, oxidized water/sewage treatment, special compound water treatment, etc., can solve problems such as poor polymerization effect and uneven coating of oxidant, and achieve Ensure the effect and ensure the uniformity of the effect

Inactive Publication Date: 2019-12-31
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a poly-3,4-ethylenedioxythiophene modified film and its preparation method and application, so as to solve the problem of polymerization caused by uneven coating of oxidant in the prior art The technical problem of poor effect improves the quality of the modified film

Method used

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  • Poly-3, 4-ethylenedioxythiophene modified film, preparation method and application thereof
  • Poly-3, 4-ethylenedioxythiophene modified film, preparation method and application thereof

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preparation example Construction

[0034] as attached figure 1 As shown, the invention provides a kind of preparation method of poly-3,4-ethylenedioxythiophene modified film, comprising the following steps:

[0035] Step 1. Prepare a polyvinylidene fluoride base film on the support material; specifically, the following steps are included:

[0036] Step 11, dissolving polyvinylpyrrolidone and polyvinylidene fluoride in N, N-dimethylacetamide in turn, stirring until the air bubbles are eliminated, and obtaining a casting solution; the mass ratio of polyvinylpyrrolidone and polyvinylidene fluoride is (1- 2): 5; the stirring rate is 200~300r / min, and the stirring time is 24-36h;

[0037] Step 12, use a 200-300 μm film scraper to scrape the casting solution obtained in step 1 on the non-woven fabric, and the non-woven fabric is fixed on the surface of the flat substrate; then apply the casting solution The non-woven fabric is soaked in deionized water at room temperature until the casting liquid is solidified to o...

Embodiment 1

[0044] The invention provides a poly-3,4-ethylenedioxythiophene modified film, comprising the following steps:

[0045] Step 1, casting solution preparation

[0046] At room temperature, dissolve 6g of polyvinylpyrrolidone and 15g of polyvinylidene fluoride in 100mL of N,N-dimethylacetamide, stir until the bubbles are eliminated, and obtain a casting solution; wherein, the stirring rate is 300r / min, the stirring time is 24h;

[0047] Step 2. Select a clean non-woven fabric with a size of 16cm×18cm as the support material for the polyvinylidene fluoride substrate, and fix the non-woven fabric on a smooth and flat glass sheet; Scrape the surface of the cloth; then soak the non-woven fabric coated with the casting solution in deionized water at room temperature until the casting solution is solidified, and then wash it with deionized water to obtain a polyvinylidene fluoride base film;

[0048] Step 3, preparation of oxidant solution

[0049] 5g of FeCl 3 ·6H 2 O was dissol...

Embodiment 2

[0055] The invention provides a poly-3,4-ethylenedioxythiophene modified film, comprising the following steps:

[0056] Step 1, casting solution preparation

[0057] At room temperature, dissolve 6g of polyvinylpyrrolidone and 15g of polyvinylidene fluoride in 100mL of N,N-dimethylacetamide, stir until the bubbles are eliminated, and obtain a casting solution; wherein, the stirring rate is 200r / min, the stirring time is 36h;

[0058] Step 2. Select a clean non-woven fabric with a size of 16cm×18cm as the support material for the polyvinylidene fluoride substrate, and fix the non-woven fabric on a smooth and flat glass sheet; Scrape the surface of the cloth; then soak the non-woven fabric coated with the casting solution in deionized water at room temperature until the casting solution is solidified, and then wash it with deionized water to obtain a polyvinylidene fluoride base film;

[0059] Step 3, preparation of oxidant solution

[0060] 20g of FeCl 3 ·6H 2 O was disso...

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Abstract

The invention discloses a poly-3, 4-ethylenedioxythiophene modified film, a preparation method and application thereof. The preparation method includes: preparing a polyvinylidene fluoride based substrate film on a support material; taking an ethanol solution of a Fe<3+> soluble salt as an oxidizing agent, and uniformly coating the polyvinylidene fluoride based substrate film with the oxidizing agent to obtain a polyvinylidene fluoride based substrate membrane coated with the oxidizing agent; subjecting a 3, 4-ethylenedioxythiophene monomer to gas-phase polymerization reaction on the polyvinylidene fluoride based substrate membrane coated with the oxidizing agent so as to obtain the poly-3, 4-ethylenedioxythiophene modified film. According to the invention, by adopting the ethanol solutionof a Fe<3+> soluble salt as the oxidizing agent, the method utilizes the volatility of ethanol to facilitate completion of oxidizing agent coating and timely drying, avoids liquid flow in the dryingprocess, guarantees the coating uniformity of the oxidizing agent, ensures the gas-phase polymerization effect, and ensures the quality of the modified film. The film provided by the invention can realize removal of pollutants generated by mineralization decomposition of the pollutants through photocatalysis, alleviates film pollution, and has good photoelectric synergistic effect.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic or photocatalytic membrane composite materials, and in particular relates to a poly-3,4-ethylenedioxythiophene modified film and its preparation method and application. Background technique [0002] Poly-3,4-ethylenedioxythiophene is a conductive polymer developed by Bayer. It has been widely concerned in the field of conductive polymers because of its excellent environmental stability, high electrical conductivity and easy processing into films. Poly-3,4-ethylenedioxythiophene is often used as a filter membrane modification material in the form of a thin film. [0003] The existing poly-3,4-ethylenedioxythiophene modified film usually adopts the in-situ polymerization method, and the vapor deposition polymerization method is easy to control, and the prepared poly-3,4-ethylenedioxythiophene molecules have good regularity , high electrical conductivity and strong adhesion to the substrate; ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08G61/12C08L65/00C02F1/30C02F1/72
CPCC02F1/30C02F1/725C02F2305/10C08G61/126C08G2261/11C08G2261/3243C08J5/18C08J2365/00
Inventor 刘嘉栋王奕嘉
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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