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Preparation method of polyethersulfone chelate membrane chemically grafted with polyamino and polycarboxy functional groups

A chemical grafting and carboxyl functional technology, which is applied in chemical instruments and methods, inorganic chemistry, and other chemical processes, can solve problems such as the application limitations of polyethersulfone ultrafiltration membranes, improve the comprehensive application efficiency of engineering, and facilitate the processing process , the effect of high grafting rate

Active Publication Date: 2020-04-03
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most research on the modification of polyethersulfone ultrafiltration membranes focuses on the improvement of its hydrophilic properties, and its original design intention is not to improve the adsorption of heavy metal ions by polyethersulfone ultrafiltration membranes. Applications in the field of prevention and treatment are limited

Method used

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  • Preparation method of polyethersulfone chelate membrane chemically grafted with polyamino and polycarboxy functional groups
  • Preparation method of polyethersulfone chelate membrane chemically grafted with polyamino and polycarboxy functional groups
  • Preparation method of polyethersulfone chelate membrane chemically grafted with polyamino and polycarboxy functional groups

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preparation example Construction

[0039] The invention discloses a preparation method of a modified polyethersulfone chelating membrane with excellent adsorption and disposal efficiency for heavy metal pollutants in the water environment. First, the polyethersulfone powder is subjected to low-temperature plasma treatment to make free radicals on the molecular chain The active point is generated, and then under the action of benzoyl peroxide, it reacts with the double bond in the 4-chloromethylstyrene molecule, and then realizes the chlorination modification of polyethersulfone, and then polyethersulfone The chemical bonding between the chlorine functional group grafted in the molecular chain and the amino group in the reaction product of tetraethylenepentamine and nitrilotriacetic acid makes the polyethersulfone molecular chain grafted with polyamino and polycarboxy functional groups, and finally A functional polyethersulfone chelating membrane loaded with polyamino and polycarboxy functional groups was prepare...

Embodiment 1

[0054] S1. Low-temperature plasma treatment of polyethersulfone powder:

[0055] Place 6g of polyethersulfone powder on the loading plate in the reaction chamber of the plasma processor after being wrapped with a gauze bag, close the feed port of the reaction chamber, then open the vacuum port of the plasma processor and close the air inlet and outlet of the plasma processor. At the gas port, start the vacuum pump until the reading of the vacuum gauge on the plasma processor is -0.1Mpa; then close the vacuum port and the vacuum pump, open the valve of the argon cylinder and the air inlet, and feed argon, and control the flow of argon to 30mL / min , when the reading of the vacuum gauge returns to 0MPa, open the gas outlet of the reaction chamber, and then turn on the high-frequency power supply of the low-temperature plasma processor to irradiate the polyethersulfone powder. The plasma power is controlled at 30W, and the irradiation treatment temperature is room temperature. The...

Embodiment 2

[0070] S1. Low-temperature plasma treatment of polyethersulfone powder:

[0071] Place 6g of polyethersulfone powder on the loading plate in the reaction chamber of the plasma processor after being wrapped with a gauze bag, close the feed port of the reaction chamber, then open the vacuum port of the plasma processor and close the air inlet and outlet of the plasma processor. At the gas port, start the vacuum pump until the reading of the vacuum gauge on the plasma processor is -0.1Mpa; then close the vacuum port and the vacuum pump, open the valve of the argon cylinder and the air inlet, and feed argon, and control the flow of argon to 30mL / min , when the reading of the vacuum gauge returns to 0MPa, open the gas outlet of the reaction chamber, and then turn on the high-frequency power supply of the low-temperature plasma processor to irradiate the polyethersulfone powder. The plasma power is controlled at 30W, and the irradiation treatment temperature is room temperature. The...

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Abstract

The invention provides a preparation method of a polyethersulfone chelate film chemically grafted with a polyamino polycarboxyl functional group. The preparation method comprises the following steps:firstly, performing low-temperature plasma treatment on polyethersulfone powder to generate a free radical active site on a molecular chain of the polyethersulfone powder; then under the action of benzoyl peroxide, enabling the polyethersulfone powder to react with double bonds in a 4-vinylbenzyl chloride molecule so as to realize chlorination modification treatment on polyethersulfone; then by virtue of chemical bonding effects between the chlorine functional group grafted onto the molecular chain of the polyethersulfone and the amino group in a reaction product of tetraethylenepentamine andnitrilotriacetic acid, grafting the polyamino polycarboxyl functional group onto the molecular chain of the polyethersulfone; finally preparing the functional polyethersulfone chelate film carrying the polyamino polycarboxyl functional group by using a phase transfer technique. The preparation method has the advantages that a preparation process is simple, the grafting rate of the effective functional group is high, green and environmental protection are achieved, the harm to a human body is small, and the effective functional group in the prepared modified polyethersulfone chelate film is stable, is not easy to leach and lose, and has excellent adsorption and interception efficiency on heavy metal.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation, and relates to a preparation method of a polyethersulfone chelating membrane chemically grafted with polyamino and polycarboxy functional groups. Background technique [0002] With the rapid development of electroplating, chemical industry, machine manufacturing, mining and metallurgy and other industries, the discharge of heavy metal industrial wastewater has increased sharply, and its environmental hazards have been highly concerned. Heavy metals such as chromium, cadmium, nickel, lead, and mercury are different from organic pollutants and have strong toxic effects. They are difficult to biodegrade in the environment, and are easy to accumulate in organisms, and can be transmitted through the food chain, thereby affecting organisms and even humans. Health hazard. Therefore, the effective disposal of heavy metal wastewater has become an important concern in water pollution preventi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D67/00B01D69/02B01D71/68B01D71/82C02F1/28C02F1/44C02F101/20
CPCB01D67/0006B01D67/0011B01D67/0013B01D69/02B01D71/68B01D71/82B01D2325/12B01J20/265B01J20/28033C02F1/285C02F1/44C02F2101/20
Inventor 宋来洲王彩王秀丽李希达刘培冯娜
Owner YANSHAN UNIV
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