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Graphene oxide-ion liquid blend membrane and preparation method thereof

An ionic liquid and graphene technology, applied in chemical instruments and methods, membranes, membrane technologies, etc., can solve the problems of reducing the application of composite materials, uneven blending, agglomeration, etc., achieving low equipment requirements, easy operation, and increased dispersion. sexual effect

Inactive Publication Date: 2018-11-30
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, agglomeration often occurs during the blending process of graphene oxide and organic matter, and the blending is uneven, which is easy to cause defects and reduces the application of composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of preparation method of graphene oxide-ionic liquid blend film, concrete steps are:

[0021] 1) Preparation of graphene oxide-ionic liquid reactant: blend graphene oxide and ionic liquid in N-methylpyrrolidone, the concentration of graphene oxide is 0.2 mg / L, the concentration of ionic liquid is 3.0 mg / L, Stir at room temperature for 2 hours, sonicate for 30 minutes, centrifuge, filter, wash with water, freeze-dry, and place in a vacuum oven to obtain graphene oxide-ionic liquid powder, which is ready for use;

[0022] 2) Preparation of graphene oxide-ionic liquid blend membrane: add 0.1 g graphene oxide-ionic liquid powder, 1.9 g polyvinylidene fluoride powder, 1.0 g polyvinylpyrrolidone and 17 mL N-methylpyrrolidone in sequence, 70 °C Stir evenly, defoam the solution, scrape the film at 60°C, remove the solvent and dry to obtain a graphene oxide-ionic liquid blend film;

[0023] In the comparison experiment, the contact angle between the original PVDF film an...

Embodiment 2

[0025] A kind of preparation method of graphene oxide-ionic liquid blend film, concrete steps are:

[0026] 1) Preparation of graphene oxide-ionic liquid reactant: blend graphene oxide and ionic liquid in N-methylpyrrolidone, the concentration of graphene oxide is 0.2 mg / L, the concentration of ionic liquid is 3.5 mg / L, Stir at room temperature for 2 hours, sonicate for 30 minutes, centrifuge, filter, wash with water, freeze-dry, and place in a vacuum oven to obtain graphene oxide-ionic liquid powder, which is ready for use;

[0027] 2) Preparation of graphene oxide-ionic liquid blend membrane: add 0.15 g graphene oxide-ionic liquid powder, 1.85 g polyvinylidene fluoride powder, 1.0 g polyvinylpyrrolidone and 17 mL N-methylpyrrolidone in sequence, 70 °C Stir evenly, defoam the solution, scrape the film at 60°C, remove the solvent and dry it in the air to obtain a graphene oxide-ionic liquid blend film.

[0028] After testing, the contact angle between the PVDF membrane and wa...

Embodiment 3

[0030] A kind of preparation method of graphene oxide-ionic liquid blend film, concrete steps are:

[0031] 1) Preparation of graphene oxide-ionic liquid reactants: graphene oxide and ionic liquid were blended in N-methylpyrrolidone, the concentration of graphene oxide was 0.2 mg / L, and the concentration of ionic liquid was 4.0 mg / L. Stir at room temperature for 2 hours, sonicate for 30 minutes, centrifuge, filter, wash with water, freeze-dry, and place in a vacuum oven to obtain graphene oxide-ionic liquid powder, which is ready for use;

[0032] 2) Preparation of graphene oxide-ionic liquid blend membrane: add 0.1 g graphene oxide-ionic liquid powder, 1.9 g polyvinylidene fluoride powder, 1.0 g polyvinylpyrrolidone and 17 mL N-methylpyrrolidone in sequence, 70 °C Stir evenly, defoam the solution, scrape the film at 60°C, remove the solvent and dry it in the air to obtain a graphene oxide-ionic liquid blend film.

[0033] After testing, the contact angle between the PVDF mem...

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PUM

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Abstract

The invention belongs to the field of polymer modification, and particularly relates to a graphene oxide-ion liquid blend membrane. The preparation method comprises the following steps: firstly preparing graphene oxide-ion liquid nano particles, mixing the graphene oxide-ion liquid nano particles and a polyvinylidene fluoride solution, and obtaining the graphene oxide-ion liquid blend membrane byusing an immersion precipitation phase conversion method. Materials used in the invention are environment-friendly, the process is simple, the operation is easy, the requirement for equipment is low,and the industrialized implementation can be facilitated. The prepared graphene oxide-ion liquid blend membrane has good hydrophilic and dye absorption performance, and the penetrating quality of themembrane can be greatly improved.

Description

technical field [0001] The invention belongs to the field of polymer modification, and in particular relates to a graphene oxide-ionic liquid blend membrane and a preparation method thereof. Background technique [0002] There are many methods for hydrophilic modification of polyvinylidene fluoride (PVDF) membranes, and physical blending modification is one of the most important methods. At present, physical blending modification is mainly divided into two categories: one is to blend inorganic hydrophilic particles with PVDF, and the other is to blend organic hydrophilic macromolecules with PVDF. Among them, the blending of inorganic hydrophilic nanoparticles has been extensively studied due to its advantages of simple operation and no pollution to the environment. Graphene oxide is obtained by oxidation, and the oxygen-containing functional groups on the surface increase, and its properties are more active than graphene. At the same time, graphene oxide also has other exc...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D71/34
CPCB01D67/0079B01D67/0088B01D69/02B01D71/34B01D2325/12B01D2325/36
Inventor 李建华张德彬郑徽张博鑫倪惺惺张其清
Owner FUZHOU UNIVERSITY