Preparation method for functional film capable of simultaneously realizing oil-water emulsion separation and dye removal

A technology of emulsion separation and functional membrane, applied in the direction of separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of lengthy operation, etc., and achieve the effects of wide selection range, increased stability, excellent water absorption and water retention capacity

Pending Publication Date: 2018-11-30
石狮市川大先进高分子材料研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple, green and low-cost membrane separation material that can treat oily wastewater and dye wastewater at the same time. Preparation method of functional membrane for oil-water emulsion separation and dye removal

Method used

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  • Preparation method for functional film capable of simultaneously realizing oil-water emulsion separation and dye removal
  • Preparation method for functional film capable of simultaneously realizing oil-water emulsion separation and dye removal
  • Preparation method for functional film capable of simultaneously realizing oil-water emulsion separation and dye removal

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Preparation of a functional membrane that can realize oil-water emulsion separation and dye removal at the same time (using filter paper as the base material):

[0034] (1) Preparation of polymer matrix solution

[0035] Firstly, cellulose fibers such as cotton, wood pulp, and bamboo pulp were activated, that is, cellulose fibers such as cotton, wood pulp, and bamboo pulp were soaked in water, methanol, and dimethylacetamide for 1 h in sequence, and each soaking was accompanied by suction filtration. To remove the soaking solvent left in the cellulose, and finally dissolve the activated cellulose in a solvent system with a DMAc / LiCl ratio of 92:8 to obtain a 0.25wt% polymer matrix solution (ie, a hydrogel);

[0036] (2) Preparation of functional film

[0037] The filter paper was immersed in the above polymer matrix solution for 2 h to make it fully wet, and then immersed in a 3 wt % ethanol solution of citric acid for 2 h. In this step, ethanol played a role in accele...

Embodiment 2

[0044] Preparation of a functional membrane that can realize oil-water emulsion separation and dye removal at the same time (based on PVA membrane):

[0045] (1) Preparation of polymer matrix solution

[0046] Firstly, activate the cellulose, soak the cellulose in water, methanol, and dimethylacetamide for 2 h in turn, each soaking is accompanied by suction filtration to remove the soaking solvent in the cellulose, and finally dissolve the activated cellulose in In the solvent system with DMAc / LiCl ratio of 93:7, a 0.1 wt% polymer matrix solution was obtained.

[0047] (2) Preparation of functional film

[0048] Immerse the PVA film in the above polymer matrix solution for 0.1-0.5 h to make it fully wet, then immerse it in a maleic anhydride ethanol solution with a concentration of 2wt% for 0.1-0.5 h, and then heat at 80°C for 5 h, That is to say, a functional membrane that can realize oil-water emulsion separation and dye removal at the same time.

Embodiment 3

[0050] Preparation of a functional membrane that can realize oil-water emulsion separation and dye removal at the same time (based on polylactic acid membrane):

[0051] (1) Preparation of polymer matrix solution

[0052] Soak the polyvinyl alcohol in water, methanol, and dimethylacetamide for 4 h in sequence, and then dissolve the polyvinyl alcohol in the isopropanol / water (7 / 3, v / v) solvent system to obtain 2 wt % polymerization matrix solution.

[0053] (2) Preparation of functional film

[0054] The polylactic acid membrane was immersed in the above polymer matrix solution for 4 h to make it fully wet. Then immersed in an ethanol solution with a concentration of 5wt% alginic acid for 4 h, and then heated at 110 °C for 1 h, that is, a multifunctional polyvinyl alcohol hydrogel oil-water separation membrane.

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Abstract

The invention discloses a preparation method for a functional film capable of simultaneously realizing oil-water emulsion separation and dye removal. The method comprises the following steps: (1) preparing a polymer matrix solution; and (2) combining a hydroxyl-containing substrate with the polymer matrix solution, and enabling acceleration of gelation and introduction of charged functional groupsto be realized in one step to obtain the functional film capable of simultaneously realizing the oil-water emulsion separation and the dye removal. According to the method disclosed by the invention,the polymer matrix solution gives high specific surface energy to the hydroxyl-containing substrate, so that super-hydrophilic underwater super-oleophobic performance is obtained, and high-efficiencyseparation of oil and water can be realized; and the charged functional groups are introduced, organic dye is adsorbed through electrostatic interaction, so that the organic dye is removed, and finally dye pollutants are removed while an oil-water emulsion is separated only by gravity.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and macromolecular functional materials, and in particular relates to a preparation method of a functional film capable of simultaneously realizing oil-water emulsion separation and dye removal. Background technique [0002] In recent years, due to the development of industrialization and the rapid growth of population, the shortage of water resources and water pollution have become urgent problems to be solved. Therefore, great efforts have been made to treat toxic organic pollutants in water. Many feasible technologies have been applied to water purification treatment. However, there are various types of pollutants, and most of the reported methods cannot treat multiple pollutants at the same time. Among the complex water pollutants, insoluble oil and water-soluble dyes are the most important pollutants, which are difficult to degrade and will not only cause environmental pollution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/38B01D71/10B01D71/08B01D69/12B01D17/022
CPCB01D17/02B01D69/125B01D71/08B01D71/10B01D71/38B01D2325/36
Inventor 陈芃涛敖成鸿卢灿辉张伟邱毓芳许玮柏许馨元
Owner 石狮市川大先进高分子材料研究中心
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