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Preparation method of polysiloxane modified super-hydrophobic sponge for oil-water separation

A technology for superhydrophobic sponge and oil-water separation, applied in the field of preparation of polysiloxane modified superhydrophobic sponge, can solve the problems of reduced heat resistance and mechanical stability of sponge, and achieve excellent thermal stability, strong adsorption capacity, Good weather resistance

Active Publication Date: 2022-05-31
CANGZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is simple and easy to implement, but the introduction of strong oxidants brings experimental risks, and the heat resistance and mechanical stability of the sponge after oxidation etching are reduced

Method used

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  • Preparation method of polysiloxane modified super-hydrophobic sponge for oil-water separation
  • Preparation method of polysiloxane modified super-hydrophobic sponge for oil-water separation
  • Preparation method of polysiloxane modified super-hydrophobic sponge for oil-water separation

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Experimental program
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Effect test

Embodiment 1

[0052] The melamine sponge was cut into 2×2×2 cm blocks, washed with deionized water and ethanol several times and dried for later use. Dissolve 0.5g of hydroxyl-terminated polydimethylsiloxane, 0.1g of tetraethylorthosilicate and 0.02g of dibutyltin dilaurate in 15g of n-hexane, and add 0.18g of hydrophobic gas-phase nano-SiO 2 , after ultrasonic dispersion for 10min, stir on a magnetic stirrer for 60min to obtain PDMS / SiO 2 compound solution. Submerge the pretreated sponge completely in PDMS / SiO 2 In the composite solution, take it out after 30 minutes, and after curing and drying in an oven at 55°C, you can get PDMS / SiO 2 Modified sponge.

[0053] The modified sponge prepared according to Example 1 is tested by a contact angle tester, and the average water contact angle is 151 ± 1.0 ° ( figure 1 ), it can be seen that the modified sponge has excellent hydrophobicity.

[0054] According to the scanning electron micrograph of the modified sponge prepared in Example 1, th...

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Abstract

The invention discloses a preparation method of polysiloxane modified super-hydrophobic sponge for oil-water separation, and belongs to the technical field of functional material preparation and application. According to the preparation method, a proper amount of hydrophobic gas-phase nano SiO2 is dispersed into a solution of hydroxyl-terminated polydimethylsiloxane and tetraethoxysilane, and the super-hydrophobic melamine sponge is prepared by a dipping method and has a good porous structure and hydrophobic and oleophylic characteristics. When being used for oil-water separation, the oil-water separator has excellent anti-compression performance and recycling performance. The process is simple and convenient, the cost is low, the main raw materials are non-toxic, harmless, green and environment-friendly, all the raw materials are commercially available industrial products, large-scale production is easy to achieve, and the method has wide application prospects in separation and recovery of oil-containing or organic solvent and water mixtures.

Description

technical field [0001] The invention relates to a preparation method of a polysiloxane-modified superhydrophobic sponge used for oil-water separation, and belongs to the technical field of preparation and application of functional materials. Background technique [0002] With the development of petrochemical industry, oil spill accidents in the ocean occur frequently, which have a bad impact on the natural environment and human life. Therefore, the development of convenient and effective oil-absorbing materials is imminent. Three-dimensional porous materials with ultra-large internal spaces have become one of the candidates for oil-water separation materials, such as polymer materials, carbon fibers, graphene, tobacco ash, and aerogels, etc. The preparation of most hydrophobic and lipophilic porous materials faces the problems of high cost, large energy consumption and complex production process. [0003] Currently, melamine sponges with high porosity, low density, elastic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08J9/42C08L61/28C02F1/28C02F101/30
CPCC08J9/40C08J9/42C02F1/285C08J2361/28C02F2101/30Y02A20/204
Inventor 苗成朋郭琳琳王洪玲崔维真庞亚恒于庆水
Owner CANGZHOU NORMAL UNIV
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