Preparation method of compound material with super-hydrophilic polyvinylidene fluoride@dopamine@silicon dioxide

A technology of polyvinylidene fluoride and polyvinylidene fluoride membrane, which is applied in the field of preparation of superhydrophilic polyvinylidene fluoride@dopamine@silicon dioxide composite materials, which can solve problems such as blocking sunlight, low separation efficiency, and endangering human health , to achieve the effect of improving hydrophilic performance, improving rough structure and good mechanical properties

Inactive Publication Date: 2016-12-07
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to investigations and studies, about 3.2 billion cubic tons of oil enters water bodies every year to form oily wastewater worldwide. Most of the oil leaked on the water surface easily forms oil-water emulsions or oil films, and floats on the water surface, blocking gas The normal exchange of oxygen and carbon dioxide, etc., also hinders the sunlight that can enter the water body, and finally seriously affects the photosynthesis of marine plants; oily substances are also easily attached to rocks and beaches, affecting the ecological environment of the coast , Destroy the ecological value of the coast, and because oil contains a large amount of mutagenic and carcinogenic toxic hydrocarbons, they can be passed through the food chain of aquatic organisms, and ultimately endanger human health
[0003] The commonly used emulsion separation methods include chemical separation method, centrifugation method, high-voltage electric field method, and membrane separation method. Membrane separation technology refers to the process of separating a mixtur

Method used

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  • Preparation method of compound material with super-hydrophilic polyvinylidene fluoride@dopamine@silicon dioxide
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  • Preparation method of compound material with super-hydrophilic polyvinylidene fluoride@dopamine@silicon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) Preparation of polyvinylidene fluoride film: Dissolve 3g of polyvinylidene fluoride powder in 40mL of N-methylpyrrolidone, stir mechanically in a water bath at 40°C for 12 hours, and then stand in a water bath at 40°C for 12 hours to obtain polyvinylidene fluoride For casting solution, apply the casting solution on a glass plate at a uniform speed with a scraper, and then place it in a coagulation bath (deionized water). solvent, washed with distilled water and dried at 40°C.

[0028] (2) Preparation of polyvinylidene fluoride@dopamine: Add 200 mg of dopamine to 100 mL of 10 mM Tris-HCl solution and mix evenly in the solution. Take a polyvinylidene fluoride membrane with a size of 3 × 3 cm and immerse it in a mixed solution with a pH of 8.5 and room temperature. Shake in a shaker for 12 hours (80-120 rpm) under certain conditions, wash with water and dry at 40°C.

[0029] (3) Preparation of superhydrophilic polyvinylidene fluoride@dopamine@silica composite film: 0....

Embodiment 2

[0036] (1) Preparation of polyvinylidene fluoride film: Dissolve 4.5g of polyvinylidene fluoride powder in 40mL of N-methylpyrrolidone, mechanically stir in a water bath at 60°C for 8 hours, and then stand in a water bath at 60°C for 8 hours to obtain polyvinylidene fluoride Ethylene casting solution, apply the casting solution on the glass plate at a uniform speed with a scraper, and then place it in a coagulation bath (distilled water). solvent, washed with distilled water and dried at 40°C.

[0037](2) Preparation of polyvinylidene fluoride@dopamine: In 100mL10mM Tris-HCl solution, add 150mg dopamine in the solution and mix evenly, take a polyvinylidene fluoride film with a size of 3×3cm and immerse it in the mixed solution at room temperature of pH=8.5 Shake in a lower shaker for 8 hours (80-120 rpm), wash with water and dry at 40°C.

[0038] (3) Preparation of superhydrophilic polyvinylidene fluoride@dopamine@silica composite film: 0.2mol NH 3 , 0.27mol ethanol, 25mL de...

Embodiment 3

[0040] (1) Preparation of polyvinylidene fluoride film: Dissolve 6g of polyvinylidene fluoride powder in 40mL of N-methylpyrrolidone, mechanically stir in a water bath at 80°C for 6h, then stand in a water bath at 80°C for 6h to obtain polyvinylidene fluoride For casting solution, apply the casting solution on a glass plate at a uniform speed with a scraper, and then place it in a coagulation bath (deionized water). solvent, washed with distilled water and dried at 40°C.

[0041] (2) Preparation of polyvinylidene fluoride@dopamine: In 100mL10mM Tris-HCl solution, add 2mg / mL dopamine in the solution and mix evenly, take a polyvinylidene fluoride membrane with a size of 3×3cm and immerse it in the mixed solution pH=8.5 room temperature Shake in a shaker for 6 hours (80-120 rpm) under certain conditions, wash with water and dry at 40°C.

[0042] (3) Preparation of superhydrophilic polyvinylidene fluoride@dopamine@silica composite film: 0.2mol NH 3 , 0.27mol ethanol, 25mL deioni...

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Abstract

The invention provides a preparation method of a compound material with super-hydrophilic polyvinylidene fluoride@dopamine@silicon dioxide. The preparation method comprises the following steps of: (1) preparing a polyvinylidene fluoride membrane; (2) preparing a polyvinylidene fluoride@dopamine membrane; (3) preparing the compound material with the super-hydrophilic polyvinylidene fluoride, the dopamine and the silicon dioxide. The compound material prepared by the invention is good in mechanical property and stable in structure, simultaneously has super-hydrophilic property and can be used for emulsion separation.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophilic polyvinylidene fluoride@dopamine@silicon dioxide composite material, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] With the rapid development of social economy, the continuous progress of industrial and agricultural production, and the gradual improvement of people's living standards, environmental problems have become a major challenge for mankind. Among them, crude oil mining, marine oil spill accidents, and domestic sewage produce a large amount of oily wastewater. worsen the living environment of human beings. According to investigations and studies, about 3.2 billion cubic tons of oil enters water bodies every year to form oily wastewater worldwide. Most of the oil leaked on the water surface easily forms oil-water emulsions or oil films, and floats on the water surface, blocking gas The normal exchange of...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/02B01D67/00
CPCB01D71/34B01D67/0011B01D69/02B01D2325/36
Inventor 谢阿田崔久云戴江栋何劲松李春香闫永胜
Owner JIANGSU UNIV
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