Preparation method of multi-purpose in-level oil-water separation material

An oil-water separation and grading technology, applied in the field of preparation of graded porous composite mesh membrane, can solve the problem of inability to separate metal ions, and achieve the effect of fast and effective adsorption process, improved adsorption time, and rapid process.

Active Publication Date: 2015-09-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional gravity-driven oil-water separation membranes can only separate emulsions or immiscible oil-water mixtures, but cannot separate metal ions dissolved in solution

Method used

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  • Preparation method of multi-purpose in-level oil-water separation material
  • Preparation method of multi-purpose in-level oil-water separation material
  • Preparation method of multi-purpose in-level oil-water separation material

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0039] Specific implementation mode 1: In this implementation mode, graded oil-water separation materials are prepared according to the following steps:

[0040] (1) Preparation of mesh porous Cu film

[0041] The porous Cu thin film (20-400 mesh) was prepared by the hydrogen bubble template method, and the specific steps were as follows: after the copper mesh substrate was acid-washed and alkali-washed to remove oil and oxides, a platinum sheet was used as the anode (2×2cm 2 ), copper mesh as counter electrode cathode (3×3cm 2 ) for electrodeposition ( figure 1 ), the bath composition includes 0.02-4mol L -1 CuSO 4 and 0.1-5mol L -1 h 2 SO 4 , pH=4.0±0.5, current density is 0.1-8.0A·cm -2 , the deposition time is 5-40s.

[0042] (2) Preparation of FCN / PPy composite film coating on mesh porous Cu film

[0043] The above-mentioned mesh porous Cu film is immersed in the prepared mixed solution, and the mixed solution contains 0.5-20mmol L-1 Pyrrole, 0.5-20mmol L -1 K ...

specific Embodiment approach 2

[0050] Specific embodiment two: In this embodiment, a multifunctional oil-water separation membrane is prepared according to the following steps:

[0051] (1) Preparation of mesh porous Cu film

[0052] Hydrogen bubble template method was used to prepare mesh porous Cu film (substrate copper mesh 100 mesh), and the specific steps were as follows: after pickling and alkaline cleaning of copper mesh substrate to remove oil and oxides, platinum sheet was used as anode (2 × 2 cm 2 ), copper mesh as counter electrode cathode (3×3cm 2 ), the bath composition includes 0.2mol L -1 CuSO 4 and 1mol L -1 h 2 SO 4 , pH=4.0±0.5, the current density is 8A cm -2 , the deposition time is 10s. The electron micrograph of the microscopic morphology of the mesh porous Cu thin film is shown in Figure 4 , it can be seen from the figure that the copper mesh presents a hierarchical porous structure.

[0053] (2) Preparation of FCN / PPy composite film coating on mesh porous Cu film

[0054] ...

specific Embodiment approach 3

[0064] Specific embodiment three: In this embodiment, a multifunctional oil-water separation membrane is prepared according to the following steps:

[0065] (1) Preparation of mesh porous Cu film

[0066] Hydrogen bubble template method was used to prepare mesh-like porous Cu film (substrate copper mesh 300 mesh), and the specific steps were as follows: after acid-washing and alkali-washing the copper mesh substrate to remove oil and oxides, a platinum sheet was used as an anode (2 × 2 cm 2 ), copper mesh as counter electrode cathode (3×3cm 2 ), the bath composition includes 0.4mol L -1 CuSO 4 and 1mol L -1 h 2 SO 4 , pH=4.0±0.5, the current density is 7A cm -2 , the deposition time is 20s. The electron micrograph of the microscopic morphology of the mesh porous Cu thin film is shown in Figure 5 , it can be seen from the figure that a porous mesh with a dense pore size can be obtained by electrodeposition of a dense copper mesh.

[0067] (2) Preparation of FCN / PPy co...

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Abstract

The invention discloses a preparation method of a multi-purpose in-level oil-water separation material. The preparation method comprises the following steps: preparing a porous reticular Cu film by adopting a hydrogen bubble template; preparing an ionic imprinted polymer coating on the surface of the porous reticular Cu film, and imprinting ferricyanide(FCN) as counter ions of metal ions into polypyrrole (PPy) to prepare an FCN / PPy composite film coating. The area of a substrate of the multi-purpose in-level oil-water separation film prepared by the method provided by the invention is 3*3cm<2>, the bore diameter of the porous reticular film is 100-500 micrometers, the second-level bore diameter, namely the bore diameter of a porous structure plated on the reticular substrate is 10-120 micrometers, the ionic imprinted polypyrrole coating is cauliflower-shaped, the bore diameter of small particles is 100-800 nm, and the bore diameter of large bulges is 1-8 micrometers. The multi-purpose oil-water separation film prepared by the method provided by the invention has superoleophobic property underwater, has effective self-cleaning function, and also has excellent mechanical stability.

Description

technical field [0001] The invention relates to a preparation method of a multifunctional graded porous composite mesh. Background technique [0002] Oil spills and oily industrial wastewater discharges are already a worldwide problem, which brings many toxic substances to the ocean, which are passed through the marine food chain to every species from lower plants and algae to higher mammals, including humans, making organism species and Human health is threatened. In addition to insoluble oil, industrial wastewater often also contains a large number of dispersed emulsions and heavy metal ions. Due to their toxicity and carcinogenic effects, heavy metals are considered to be "killers" that threaten health. With the increase of population and the scarcity of fresh water resources, it has become an urgent need to prepare multifunctional separation membranes that can be stably recycled and used to remove oil and heavy metal ions in different states in water. [0003] Traditio...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12B01D69/02C02F1/40C02F1/44C02F1/62B01D17/022C25D9/02C25D1/08
Inventor 成中军张恩爽胡相相刘宇艳谭惠丰
Owner HARBIN INST OF TECH
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