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Fluorosilicone membrane for high-salt wastewater treatment and preparation method thereof

A high-salt wastewater, fluorosilicon technology, applied in permeation/dialysis water/sewage treatment, chemical instruments and methods, membranes, etc., can solve the problem of low water flux and salt removal rate, poor corrosion resistance, complex preparation process, etc. To achieve the effect of improving the salt removal rate, stable membrane performance and excellent mechanical and mechanical properties

Active Publication Date: 2020-11-24
戴金燕
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared fluorosilicon membrane for high-salt wastewater treatment overcomes the more or less complex preparation process, high preparation cost, poor strength, poor corrosion resistance and anti-fouling performance of the membrane for high-salt wastewater treatment in the prior art. Poor, technical problems of low water flux and salt removal rate, simple and easy to operate preparation process, low preparation cost, excellent mechanical properties, good corrosion resistance, high water flux, high salt removal rate, antifouling performance good advantage

Method used

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  • Fluorosilicone membrane for high-salt wastewater treatment and preparation method thereof

Examples

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Effect test

Embodiment 1

[0028] A method for preparing a fluorosilicon membrane for high-salt wastewater treatment, comprising the steps of:

[0029] Ⅰ Preparation of fluorosilicone polymer: Bis(4-aminophenoxy)dimethylsilane 18.8g, 2,2-bis(4-carboxyphenyl)hexafluoropropane 10g, 1-ethyl-(3- Dimethylaminopropyl) carbodiimide hydrochloride 3g, 2g of 4-dimethylaminopyridine are dissolved in dimethyl sulfoxide 100g to form a solution, then the solution is added in the reaction kettle, and the air in the kettle is replaced with nitrogen, usually Press down at 75°C for 2 hours, then raise the temperature to 110°C for 2 hours, then raise the temperature to 220°C, conduct the primary polycondensation reaction for 4 hours, then evacuate to 500Pa, heat to 235°C, then conduct the polycondensation reaction for 8 hours, and then cool to room temperature , adjusted to normal pressure, precipitated in water, washed the precipitated polymer three times with ethanol, and then dried in a vacuum oven at 70°C for 10 hours...

Embodiment 2

[0034]A method for preparing a fluorosilicon membrane for high-salt wastewater treatment, comprising the steps of:

[0035] Ⅰ Preparation of fluorosilicone polymer: Bis(4-aminophenoxy)dimethylsilane 18.8g, 2,2-bis(4-carboxyphenyl)hexafluoropropane 10g, 1-ethyl-(3- 4g of dimethylaminopropyl) carbodiimide hydrochloride, 2.3g of 4-dimethylaminopyridine are dissolved in 110g of N,N-dimethylformamide to form a solution, then the solution is added to the reaction kettle, and the Replace the air in the kettle with air, react at 79°C under normal pressure for 2.3 hours, then raise the temperature to 113°C for 2.3 hours, then raise the temperature to 223°C, perform the primary polycondensation reaction for 4.5 hours, then vacuumize to 500Pa, heat to 237°C, and then conduct the polycondensation reaction After 8.5 hours, cool to room temperature, adjust to normal pressure, precipitate in water, wash the precipitated polymer with ethanol 4 times, and then dry in a vacuum oven at 73°C for ...

Embodiment 3

[0040] A method for preparing a fluorosilicon membrane for high-salt wastewater treatment, comprising the steps of:

[0041] Ⅰ Preparation of fluorosilicone polymer: Bis(4-aminophenoxy)dimethylsilane 18.8g, 2,2-bis(4-carboxyphenyl)hexafluoropropane 10g, 1-ethyl-(3- 5 g of dimethylaminopropyl) carbodiimide hydrochloride, 2.5 g of 4-dimethylaminopyridine are dissolved in 130 g of N-methylpyrrolidone to form a solution, then the solution is added to the reactor, and the reactor is replaced with neon gas Air, react at 80°C for 2.6 hours under normal pressure, then raise the temperature to 115°C for 2.6 hours, then raise the temperature to 225°C, perform the primary polycondensation reaction for 5 hours, then vacuumize to 500Pa, heat to 241°C, and then polycondense for 9 hours, then Cool to room temperature, adjust to normal pressure, precipitate in water, wash the precipitated polymer with ethanol 4 times, and then dry in a vacuum oven at 76°C for 13 hours to obtain a fluorosilico...

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Abstract

The invention provides a preparation method of a fluorosilicone film for treating high-salt wastewater. The preparation method comprises the following steps: (I) preparing a fluorosilicone polymer; (II) modifying nano-boron fibers; and (3) preparing the film. The invention further discloses the fluorosilicone film prepared by virtue of the preparation method. The preparation method disclosed by the invention is simple and feasible, low in cost, equipment dependence and requirements on reaction conditions and suitable for industrial production, and the raw materials are easily available. The prepared fluorosilicone film has the advantages that the preparation process is simple and easy in operation, the preparation cost is low, the mechanical property is excellent, the corrosion resistanceis good, the water flux and the salt removal rate are high, and the pollution resistance is good.

Description

technical field [0001] The invention relates to the technical field of high-salt wastewater treatment, in particular to a fluorosilicon membrane for high-salt wastewater treatment and a preparation method thereof. Background technique [0002] High-salt industrial wastewater pollution is a prominent type of environmental pollution. It has a huge impact on the ecological environment and people's health. A large amount of high-salt industrial wastewater will be produced in many industrial productions such as chemical industry, printing and dyeing, medicine, and food. These The massive discharge of high-salt industrial wastewater will lead to an imbalance in the ecosystem, frequent red tides, and the breeding of diseases. How to deal with high-salt wastewater has become a hot topic in the industry. [0003] There are many types of pollutants in high-salt industrial wastewater, and the system is complex. In addition, due to the high salinity and chloride ion content of high-sal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/70B01D69/02B01D67/00C02F1/44
CPCB01D67/0002B01D69/02B01D71/70B01D2325/24C02F1/44
Inventor 不公告发明人
Owner 戴金燕
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