Preparation method of polyamino phosphoric acid functional-born polyether sulfone functional separating membrane

A polyaminophosphonic acid functional and functional separation technology, applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problem of poor stability of chelating functional groups, decreased removal efficiency of heavy metals, and loss of aminophosphonic acid groups. and other problems, to achieve the effect of good stability, excellent adsorption and removal performance, and strong operability

Active Publication Date: 2017-06-13
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modified polyvinylidene fluoride microfiltration separation membrane prepared by this patented technology has poor stability of the chelating functional group, and butyl titanate and ethylenediamine tetramethylene phosphonic acid are bonded to fo...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Chloroacetylation treatment of polyethersulfone:

[0039] Pour 90g of chloroform into a three-necked round-bottomed flask with a specification of 250mL, then add 6g of polyethersulfone powder with a particle size of 1.5μm into the three-necked round-bottomed flask filled with chloroform solvent, and place the three-necked round-bottomed flask with an iron stand The round bottom flask is fixed on the stirrer of model DZ1001, one port on the side of the three-necked round bottom flask is fed with nitrogen gas, the other port on the side of the round bottom flask is connected with an air guide tube, and the other end of the air guide tube is connected to an absorption tube filled with activated carbon particles , the activated carbon in the absorption tube can absorb the chloroform volatilized by the reaction. The mouth of the round bottom flask is blocked with a ground glass stopper, and then slowly adjust the rotation speed knob of the agitator to adjust the rotation ...

Embodiment 2

[0050] (1) Chloroacetylation treatment of polyethersulfone:

[0051] First pour 92g of chloroform into a three-necked round-bottomed flask with a specification of 250mL, then add 6g of polyethersulfone powder with a particle size of 1.5 μm into the three-necked round-bottomed flask filled with chloroform solvent, and use an iron stand The three-neck round bottom flask is fixed on the stirrer of model DZ1001, one port on the side of the three-neck round bottom flask is fed with nitrogen gas, the other port on the side of the round bottom flask is connected with an air guide tube, and the other end of the air guide tube is connected to an absorber filled with activated carbon particles. The active carbon in the absorption tube can absorb the chloroform volatilized by the reaction. The mouth of the round bottom flask is blocked with a ground glass stopper. Then slowly adjust the rotation speed knob of the agitator to adjust the rotation speed to 550r / min. Magnetic stirring at room...

Embodiment 3

[0062] (1) Chloroacetylation treatment of polyethersulfone:

[0063]First pour 94g of chloroform into a three-necked round-bottomed flask with a specification of 250mL, then add 6g of polyethersulfone powder with a particle size of 1.5μm into the three-necked round-bottomed flask filled with chloroform solvent, and use an iron stand to place the three-necked round-bottomed flask The round bottom flask is fixed on the stirrer of model DZ1001, one port on the side of the three-necked round bottom flask is fed with nitrogen gas, the other port on the side of the round bottom flask is connected with an air guide tube, and the other end of the air guide tube is connected to an absorption tube filled with activated carbon particles , the activated carbon in the absorption tube can absorb the chloroform volatilized by the reaction. The mouth of the round bottom flask is blocked with a ground glass stopper, and then slowly adjust the rotation speed knob of the agitator to adjust the ro...

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Abstract

The invention relates to a preparation method of polyamino phosphoric acid functional-born polyether sulfone functional separating membrane. The preparation method mainly comprises the following steps: by taking trichloromethane, chloroacetyl chloride and anhydrous aluminum chloride as main reagents, performing chloracetylation to the polyether sulfone at room temperature; then by taking N,N-dimethylacetylamide as a solvent and tetraethylenepentamine as an amination reagent, performing amination to the polyether sulfone, subjected to chloracetylation, at the temperature of 80-85DEG C, and preparing chloroacetyl chloride-tetraethylenepentamine- polyether sulfone anion-exchange membrane; then in methanol and triethylamine solution, by taking paraformaldehyde and phosphorous acid as reagents, performing phosphorylation graft modification to the chloroacetyl chloride-tetraethylenepentamine- polyether sulfone anion-exchange membrane, to prepare the polyamino phosphoric acid functional-born polyether sulfone functional separating membrane. The preparation method has good technological stability, the chelated functional groups of the prepared polyether sulfone functional separating membrane are difficult to lose, and the heavy metal pollutants in water environment can be effectively removed.

Description

technical field [0001] The invention relates to a preparation method of a separation membrane. Background technique [0002] In recent years, with the rapid economic development, there are more and more links involving metal processing and electroplating processes in the production process of aerospace, navigation, transportation, machinery manufacturing, hardware and electrical appliances, textiles and other industries, accompanied by the discharge of heavy metal pollutants As a result, the content of heavy metal pollutants in soil, water and the atmosphere exceeds the self-purification ability of the environment, which in turn leads to serious environmental pollution problems. As we all know, heavy metal pollutants discharged into the environment have the characteristics of bioaccumulation, they are not easy to biodegrade, and are easy to be activated after blunting, and the forms of heavy metal pollutants are complex and changeable, which can be transmitted through the bi...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D71/68B01D69/02
CPCB01D67/0006B01D69/02B01D71/68B01D2323/38
Inventor 宋来洲王进博冯建社王秀丽李春雨吉敏高佳丽
Owner YANSHAN UNIV
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