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Preparation method of lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge

A polyurethane sponge, lipophilic and hydrophobic technology, applied in separation methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of high heat resistance requirements of raw material foam, difficult to control the reaction process, unfavorable production and application, etc., to achieve durable Low thermal requirements, high oil-water selectivity, good elasticity

Active Publication Date: 2022-02-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term heating in the preparation process will damage the foam skeleton, which requires high heat resistance of the raw material foam, and the reaction system is complex, and the reaction process is difficult to control, which is not conducive to large-scale production and application (Yu L, et al. Robust magnetic polystyrene foam for high efficiency and removal oil from water surface[J].Separation and Purification Technology,2017,173:121-128.)

Method used

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  • Preparation method of lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge
  • Preparation method of lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge
  • Preparation method of lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1: Preparation of lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge

[0032] Weigh 150 mg of nano-iron tetroxide and 30 ml of absolute ethanol into a small beaker, and sonicate for 2 min to make the system evenly dispersed. Cut the polyurethane sponge into a size of 1 cm × 1 cm × 3 cm, then take a piece and add it to the beaker, and continue to sonicate for 10 min. Then, the sponge was taken out and placed in an oven with a temperature of 60° C. to dry for 2 hours to obtain a magnetic polyurethane sponge.

[0033] Measure 6 mL of styrene and 0.3 mL of divinylbenzene in turn and mix them uniformly in a quartz tube by ultrasonic for 2 min. The above-mentioned dried magnetic polyurethane sponge is immersed in the solution, protected by nitrogen, and irradiated with a high-pressure mercury lamp for 14 h. Finally, the sponge was thoroughly washed with toluene, ethyl acetate and ethanol in turn, and dried in an oven at a temperature of 60°...

Embodiment 2

[0037] Example 2: Preparation of lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge

[0038] Weigh 150 mg of nano-iron tetroxide and 30 ml of absolute ethanol into a small beaker, and sonicate for 2 min to make the system evenly dispersed. Cut the polyurethane sponge into a size of 1 cm × 1 cm × 3 cm, then take a piece and add it to the beaker, and continue to sonicate for 10 min. Then, the sponge was taken out and placed in an oven with a temperature of 60° C. to dry for 2 hours to obtain a magnetic polyurethane sponge.

[0039] Measure 6 mL of styrene and 0.1 mL of divinylbenzene in turn and mix them uniformly in a quartz tube by ultrasonic for 2 min. Take the above-mentioned dried magnetic polyurethane sponge and immerse it in the solution, protect it with nitrogen, and irradiate it with a high-pressure mercury lamp for 14 hours. Finally, the sponge was thoroughly washed with toluene, ethyl acetate and ethanol in turn, and dried in an oven at a t...

Embodiment 3

[0041] Example 3: Preparation of lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge

[0042] Weigh 150 mg of nano-iron tetroxide and 30 ml of absolute ethanol into a small beaker, and sonicate for 2 min to make the system evenly dispersed. Cut the polyurethane sponge into a size of 1 cm × 1 cm × 3 cm, then take a piece and add it to the beaker, and continue to sonicate for 10 min. Then, the sponge was taken out and placed in an oven with a temperature of 60° C. to dry for 2 hours to obtain a magnetic polyurethane sponge.

[0043] Measure 6 mL of styrene and 0.5 mL of divinylbenzene in turn and mix them uniformly by ultrasonic for 2 min in a quartz tube. Take the above-mentioned dried magnetic polyurethane sponge and immerse it in the solution, protect it with nitrogen, and irradiate it with a high-pressure mercury lamp for 14 hours. Finally, the sponge was thoroughly washed with toluene, ethyl acetate and ethanol in turn, and dried in an oven at a tem...

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Abstract

The invention discloses a preparation method of lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge. The method firstly coats a layer of nano-ferric oxide on the surface of the polyurethane sponge by the impregnating ultrasonic method to obtain a magnetic polyurethane sponge, then uses the magnetic polyurethane sponge as a matrix, styrene as a monomer, and divinylbenzene as a cross-linking agent. Under the protection of nitrogen gas, ultraviolet light promotes the polymerization of styrene on the surface of the magnetic polyurethane sponge, and a lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge is prepared. The invention uses ultraviolet light to trigger the polymerization of styrene to generate polystyrene, and connects the polystyrene to the surface of the polyurethane skeleton through a covalent bond, and has the advantages of no need for an initiator, mild and easy-to-control reaction conditions, and the like. The lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge prepared by the invention has a well-developed pore structure, high oil-water selectivity, and can quickly absorb oil stains on the water surface. Due to the good elasticity of the polyurethane matrix, the prepared product can be recycled to remove oil stains.

Description

technical field [0001] The invention relates to a preparation method of a lipophilic and hydrophobic magnetic polystyrene-polyurethane composite sponge, and belongs to the technical field of material preparation. Background technique [0002] In the process of oil extraction and transportation, frequent oil spills often have a catastrophic impact on the marine ecosystem, causing immeasurable losses to marine life, coastal wetlands, fishing, and tourism. In addition, with the rapid development of industry, more and more oil-containing industrial wastewater is discharged into rivers, causing pollution to freshwater resources and seriously threatening the growth of river aquatic animals and plants and human health. [0003] In order to prevent and control the possible oil pollution of water bodies, various oil pollution treatment methods such as fence method, oil spill recovery method, combustion method, chemical method, biodegradation method and adsorption method have been est...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F1/40
CPCB01J20/265B01J20/28009B01J20/28045C02F1/285C02F1/40
Inventor 姜炜周宇张宁赵刘明杨楠宋欣
Owner NANJING UNIV OF SCI & TECH
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