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Super-hydrophobic sponge, and preparation method and application thereof

A superhydrophobic sponge and superhydrophobic technology, applied in the field of functional materials, can solve the problems of poor adsorption performance of VOCs, and achieve good adsorption effect, mild environment and low price

Active Publication Date: 2019-04-12
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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  • Super-hydrophobic sponge, and preparation method and application thereof
  • Super-hydrophobic sponge, and preparation method and application thereof
  • Super-hydrophobic sponge, and preparation method and application thereof

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 1 g and put it into 80 ml of absolute ethanol, and stir it 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 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 super-hydrophobic sponge, and a preparation method and application thereof. The preparation method comprises the following steps: putting prepared polydivinylbenzene into absolute ethyl alcohol, carrying out ultrasonic stirring to prepare a polydivinylbenzene suspension, soaking a cleaned and dried sponge into the polydivinylbenzene suspension for 3 minutes, and then putting the soaked sponge into a drying oven for drying to obtain the super-hydrophobic sponge. Compared with other processes, the preparation method disclosed by the invention is simple and feasible in preparation process and mild in environment, and has no complex equipment instrument requirements. The contact angle can reach 154.4 degrees, superhydrophobicity and superoleophilicity are exhibited, an oil-water mixture can be effectively separated, and a good adsorption effect on volatile organic compounds is also achieved. The super-hydrophobic sponge provided by the invention can be widely applied to the fields of water pollution control, atmospheric 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 Applications(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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