Preparation method of polyether sulfone functional composite separating membrane

A technology of polyethersulfone and separation membrane, which is applied in semipermeable membrane separation, chemical instruments and methods, membrane technology, etc. It can solve the problems of restricting the application of heavy metal wastewater, and the effect needs to be verified experimentally, so as to achieve the goal of not easy falling off and leaching loss , good efficiency, high interception efficiency

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 can only be used for the adsorption and removal of low-concentration heavy metal pollutants, which limits its application in the treatment of heavy metal wastewater
In conclusion, the combination of micro-ultrafiltration chelating membranes with aminophosphonic acid functional groups and nanofiltration membranes covered with active functional layers will improve the removal effect of heavy metal pollutants, but the final effect needs to be verified experimentally.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Preparation of polyethersulfone carrying chloroacetyl groups:

[0045]First, pour 110g of chloroform and 6g of polyethersulfone powder with a particle size of 1.5μm into a ground four-necked glass flask in turn, and then use an iron stand to fix the four-necked flask on the intelligent digital display electric heating mantle; the side of the four-necked flask One port of the four-necked flask is equipped with a nitrogen inlet pipe, and the other port on the side of the four-necked flask is connected to an absorption device equipped with calcium oxide and activated carbon to absorb the chloroform volatilized by the reaction and the hydrogen chloride produced by the reaction; one port in the center of the four-necked flask is ground. The glass stopper is used for subsequent filling of medicines. A thermometer is inserted into the other port in the center of the four-necked flask to observe and control the temperature of the reaction system at any time; after the four-n...

Embodiment 2

[0063](1) Preparation of polyethersulfone carrying chloroacetyl groups:

[0064] First, 112g of chloroform and 6g of polyethersulfone powder with a particle size of 1.5 μm were poured into a ground four-neck glass flask in turn, and then the four-neck flask containing chloroform and polyethersulfone powder was fixed on a smart digital platform with an iron stand. One port on the side of the four-necked flask is equipped with a nitrogen inlet pipe, and the other port on the side of the four-necked flask is connected to an absorption device equipped with calcium oxide and activated carbon to absorb the chloroform volatilized by the reaction and the hydrogen chloride produced by the reaction; the four-necked flask One port in the center of the flask is blocked with a ground glass stopper for the subsequent addition of medicines. The other port in the center of the four-neck flask is inserted into a thermometer to observe and control the temperature of the reaction system at any ti...

Embodiment 3

[0082] (1) Preparation of polyethersulfone carrying chloroacetyl groups:

[0083] First, 114g of chloroform and 6g of polyethersulfone powder with a particle size of 1.5 μm were poured into a four-neck glass flask with a ground mouth, and then the four-neck flask containing chloroform and polyethersulfone powder was fixed on a smart digital platform with an iron stand. One port on the side of the four-necked flask is equipped with a nitrogen inlet pipe, and the other port on the side of the four-necked flask is connected to an absorption device equipped with calcium oxide and activated carbon to absorb the chloroform volatilized by the reaction and the hydrogen chloride produced by the reaction; the four-necked flask One port in the center of the flask is blocked with a ground glass stopper for the subsequent addition of medicines. The other port in the center of the four-neck flask is inserted into a thermometer to observe and control the temperature of the reaction system at ...

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Abstract

The invention relates to a preparation method of a polyether sulfone functional composite separating membrane. The preparation method mainly comprises the following steps: performing chloroacetylating modification treatment on polyether sulfone, wherein the surface of polyether sulfone carries a chloracetyl group; then performing a chemical bonding reaction on polyether sulfone carrying the chloracetyl group and tetraethylenepentamine in a N,N-dimethylacetamide solvent; further preparing a polyether sulfone separating membrane carrying the chloracetyl group by applying a phase transfer technology; then performing phosphorylating modification treatment on the polyether sulfone separating membrane carrying the chloracetyl group to prepare the polyether sulfone separating membrane carrying an amino phosphonic acid functional group; and finally, coating a nanofiltration intercepting thin layer on the surface of the polyether sulfone separating membrane by means of an interfacial polymerization reaction. The preparation method provided by the invention is simple and feasible, the preparation process is small in damage on health, and the nanofiltration intercepting layer on the surface of the prepared polyether sulfone functional composite separating membrane and the amino phosphonic acid chelating group inside are stable, are unlikely to fall and leach and run off, and the polyether sulfone functional composite separating membrane is high in intercepting efficiency of heavy metals, and has a wide application prospect in the field of heavy metal wastewater pollution treatment.

Description

technical field [0001] The invention relates to a preparation method of a composite membrane. Background technique [0002] Water is the source of life and one of the most important material resources indispensable for human survival and development. Water supply is not only related to people's livelihood, but also plays a vital role in sustainable economic development. In recent decades, mineral production, waste rock and tailings leaching, non-ferrous metal smelting and processing, iron and steel smelting and processing, as well as electroplating, electroless plating, and electronic component production have discharged a large amount of heavy metal wastewater, resulting in heavy metal ions and Its compounds accumulate in natural water bodies, causing serious water pollution. Heavy metals in wastewater cannot be biodegraded, they are prone to form changes, and can be transferred and accumulated in the biological chain, causing serious harm to the ecological environment an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/68
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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