A kind of preparation method of the sponge that is used for oil-water separation and regulates the pore size of the paper fiber

A technology of oil-water separation and paper fiber, which is applied in the direction of separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of poor separation effect, large processing capacity, large pore size, etc., and achieves mild reaction conditions, wide application, and reliable strong control effect

Active Publication Date: 2021-01-26
单简文
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the above-mentioned existing methods, the present invention provides a relatively simple and easy method: by using paper fibers to regulate the pore size of the sponge, a large amount and high-efficiency separation of oil-water mixture and oil-water emulsion can be realized simultaneously, which solves the problem of traditional The problem of poor separation effect caused by large pore size and large processing capacity of oil-water separation material

Method used

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  • A kind of preparation method of the sponge that is used for oil-water separation and regulates the pore size of the paper fiber
  • A kind of preparation method of the sponge that is used for oil-water separation and regulates the pore size of the paper fiber
  • A kind of preparation method of the sponge that is used for oil-water separation and regulates the pore size of the paper fiber

Examples

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Effect test

Embodiment 1

[0032] In 100mL of deionized water, add 0.7g rice paper fragments, homogenize with a homogenizer at a speed of 10000rpm for 1h to obtain a paper fiber suspension, adjust the pH value of the suspension to 3, and then the size is about 2.5×2.5×0.4 cm of melamine sponge is fully submerged, taken out after about 10 hours, and freeze-dried. Then put the freeze-dried sponge into the upper part of the vessel containing a 50% glutaraldehyde solution, seal it, and react at room temperature (25° C.) for 12 hours.

[0033] 0.1 g of dopamine and 0.1 g of polyethyleneimine with a molecular weight of 600 were added to 50 mL of tris aqueous solution with a concentration of 10 mmol / L and stirred to dissolve, and the pH value was adjusted to 8.5. Immerse the modified paper fiber sponge in the above solution and shake it at room temperature for 12 hours, so that the surface of the modified sponge is evenly covered with the polydopamine / polyethyleneimine modified layer. The sponge whose paper f...

Embodiment 2

[0037] In 100mL of deionized water, add 0.7g of ordinary white paper fragments, and use a homogenizer to homogenize at a speed of 10000rpm for 1h to obtain a paper fiber suspension. The melamine sponge of ×0.4cm is fully submerged, taken out after about 10h, and freeze-dried. Then put the freeze-dried sponge into the upper part of the vessel containing a 50% glutaraldehyde solution, seal it, and react at room temperature (25° C.) for 12 hours.

[0038] 0.1 g of dopamine and 0.1 g of polyethyleneimine with a molecular weight of 600 were added to 50 mL of tris aqueous solution with a concentration of 10 mmol / L and stirred to dissolve, and the pH value was adjusted to 8.5. Immerse the modified paper fiber sponge in the above solution and shake it at room temperature for 15 hours, so that the surface of the modified sponge is evenly covered with the polydopamine / polyethyleneimine modified layer. After the reaction is completed, wash it with water several times, and then vacuum dry...

Embodiment 3

[0041]In 100mL of deionized water, add 0.05g of rice paper fragments, homogenize with a homogenizer at a speed of 3000rpm for 0.3h to obtain a paper fiber suspension, adjust the pH of the suspension to 6, and then the size is about 2.5×2.5× The 0.4cm melamine sponge is fully submerged, taken out after about 2 hours, and freeze-dried. Then put the lyophilized sponge into the upper part of the vessel containing a 15% glutaraldehyde solution, seal it, and react at room temperature (25° C.) for 8 hours.

[0042] 0.02 g of dopamine and 0.02 g of polyethyleneimine with a molecular weight of 800 were added to 50 mL of tris aqueous solution with a concentration of 10 mmol / L and stirred to dissolve, and the pH value was adjusted to 7.2. Immerse the modified paper fiber sponge in the above solution and shake it at room temperature for 6 hours, so that the surface of the modified sponge is evenly covered with a polydopamine / polyethyleneimine modified layer. After the reaction is complete...

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Abstract

The invention discloses a preparation method of a sponge for adjusting the pore size of paper fibers used for oil-water separation. The preparation method comprises the following steps: (1) preparing a paper fiber suspension, adjusting the pH of the suspension, and immersing the sponge in the paper fiber suspension, Make the paper fiber fully enter the sponge and then freeze dry; (2) put the sponge obtained above into a container filled with a fiber fixing adhesive solution and seal it, and react at 20-70°C for 6-48 hours; (3) make the surface hydrophilic The modifying agent is added to the buffer solution to dissolve; the sponge obtained in step (2) is immersed in the above solution, shaken and deposited at 20-70° C. for 6-48 hours, and post-treated to obtain a sponge with pore size controlled by paper fibers for oil-water separation. The sponge prepared by the invention for controlling the pore size of the paper fiber used for oil-water separation has a large pore size and superhydrophilicity, and the oil-water separation treatment capacity is up to 2×10 7 L m ‑2 h ‑1 bar ‑1 ; Oil-water separation efficiency up to 96%.

Description

technical field [0001] The invention belongs to the field of polymer material preparation, and in particular relates to a preparation method of an oil-water separation material. Background technique [0002] Industrial production such as petrochemical, daily chemical, textile, leather, steel manufacturing or metal processing will produce a large amount of oily wastewater. These oily water mixtures will cause great harm to the environment and human health, and need to be effectively treated. In addition, the frequent occurrence of oil spills at sea in recent years has caused long-term and fatal impacts on the ecosystem, so the oil-water separation of oily wastewater is facing a global challenge. [0003] In recent years, membrane separation technology has become the focus of attention in the field of oil-water separation due to its advantages of high separation efficiency, simple operation, and low energy consumption; the separation efficiency and processing flux in the membr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/42C08J9/40B01D17/022C02F1/40C08L75/04C08L61/28
CPCB01D17/02C02F1/40C08J9/405C08J9/42C08J2361/28C08J2375/04C08J2401/02C08J2479/02C08J2479/04
Inventor 单简文
Owner 单简文
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