A kind of superhydrophobic sponge and its preparation method and application

A superhydrophobic sponge and superhydrophobic technology, applied in the field of functional materials, can solve the problems of poor VOCs adsorption performance, achieve good adsorption effect, simple process flow, and simple preparation method

Active Publication Date: 2021-08-10
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional adsorbents such as activated carbon and molecular sieves have poor adsorption performance on VOCs in the exhaust gas environment with high humidity. It is urgent to develop efficient and economical hydrophobic adsorbents.

Method used

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  • A kind of superhydrophobic sponge and its preparation method and application
  • A kind of superhydrophobic sponge and its preparation method and application
  • A kind of superhydrophobic sponge and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Measure 40 mL of ethyl acetate, then add 4 g of divinylbenzene, then add 0.10 g of azobisisobutyronitrile, stir the mixed solution at room temperature for 4 h, and then put it into a stainless steel tank lined with polytetrafluoroethylene In a reaction kettle, place in an oven at 100 °C for 24 h. The sponge was cleaned ultrasonically with ethanol for 20 minutes, then cleaned with water for 20 minutes, and then dried in an oven. Grind polydivinylbenzene into powder, take 1g and put it into 80ml of absolute ethanol, and stir it ultrasonically for 20min. Cut the sponge into 2*2*3 cm cuboids, put it into the suspension, soak it for 3 minutes, and then put it in an oven at 50°C to dry. Repeat three times to obtain a super-hydrophobic sponge.

Embodiment 2

[0037] Mix 20 mL of tetrahydrofuran and 3 mL of water, then add 2 g of divinylbenzene, then add 0.05 g of azobisisobutyronitrile, stir the mixed solution at room temperature for 4 h, and then put it in a Teflon-lined in a stainless steel reactor and placed in an oven at 100 °C for 24 h. The sponge was cleaned ultrasonically with ethanol for 20 minutes, then cleaned with water for 20 minutes, and then dried in an oven. Grind polydivinylbenzene into powder, put 1 g into 50 mL absolute ethanol, and stir ultrasonically for 20 min. Cut the sponge into 2*2*3 cm cuboids, put it into the suspension, soak it for 3 minutes, and then put it in an oven at 80°C to dry. Repeat three times to obtain a super-hydrophobic sponge.

Embodiment 3

[0039] Mix 20 mL of tetrahydrofuran and 2 mL of water, then add 2 g of divinylbenzene, then add 0.05 g of azobisisobutyronitrile, stir the mixed solution at room temperature for 4 h, and then put it in a Teflon-lined in a stainless steel reactor and placed in an oven at 100 °C for 48 h. The sponge was cleaned ultrasonically with ethanol for 20 minutes, then cleaned with water for 20 minutes, and then dried in an oven. Grind polydivinylbenzene into powder, take 2 g and put it into 100 mL absolute ethanol, and stir it ultrasonically for 20 min. Cut the sponge into a 2*2*3 cm cuboid, put it in the suspension, soak it for 3 minutes, and then put it in an oven at 70°C to dry. Repeat three times to obtain a super-hydrophobic sponge.

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Abstract

The invention discloses a superhydrophobic sponge, its preparation method and application. The method is to put the prepared polydivinylbenzene into absolute ethanol, stir ultrasonically to prepare a polydivinylbenzene suspension, soak the cleaned and dried sponge for 3 min, and then put it in an oven to dry to obtain Superhydrophobic sponge. Compared with other processes, the preparation process of the present invention is simple and feasible, the environment is mild, and there is no requirement for complicated equipment and instruments. The contact angle can reach 154.4°, showing superhydrophobic and superlipophilic properties, which can effectively separate oil-water mixtures and also have good adsorption for volatile organic compounds. The superhydrophobic sponge prepared by the invention can be widely used in the fields of water pollution control, air pollution control and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a superhydrophobic sponge and its preparation method and application. Background technique [0002] With the development of industry and social economy, the spillage and industrial discharge of organic solvents are becoming more and more serious, causing serious environmental and ecological damage. Once these oily pollutants are discharged into the water environment, they can prevent the oxygen in the air from dissolving in the water, causing the plankton in the water to die due to lack of oxygen, and cause the fish and shellfish to change their taste, making them unfit for consumption. Moreover, there are many toxic substances in oil and its decomposition products, which are ingested, absorbed, and enriched by aquatic organisms in the water body, causing aquatic organisms to deform. [0003] Therefore, there is a need to develop new materials for effici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/42C08F112/36B01D17/022B01J20/26B01J20/30
CPCB01D17/0202B01J20/265C08F112/36C08J9/42
Inventor 胡芸谢俊张金辉
Owner SOUTH CHINA UNIV OF TECH
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