Super-infiltration metal net film and preparation method and application thereof

A super-wetting, omentum technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problem of long-term oil pollution prevention of super-hydrophilic underwater oleophobic omentum, affecting omentum separation efficiency and flux , short service life and other problems, to achieve the effect of enhancing long-term pollution resistance, long-term anti-pollution characteristics, and improving durability.

Active Publication Date: 2022-04-29
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of preparing this kind of omentum is mainly to carry out simple chemical etching or roughening on the omentum. The obtained omentum is difficult to maintain its wettability for a long time during service, and the service life is extremely short. A large amount of waste liquid needs subsequent treatment, and the super-wetting coating coated metal mesh method is widely used because of its good modification effect, simple process, and long life of the mesh.
However, due to the inherent lipophilicity in the air of the superhydrophilic underwater oleophobic coating itself, it is very easy to adhere to the oil in the sewage during the working process, resulting in the loss of hydrophilicity, which affects the separation efficiency and communication of the omentum. In severe cases, it will directly lead to the failure o

Method used

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  • Super-infiltration metal net film and preparation method and application thereof
  • Super-infiltration metal net film and preparation method and application thereof
  • Super-infiltration metal net film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 (morphology / flatness / separation efficiency)

[0033] The 316 stainless steel wire mesh with a mesh size of 15 μm was dried for 10 minutes in absolute ethanol and 10 minutes in deionized water in a water bath at 40°C. Mix 5g of water-based acrylic resin, 1g of water-based epoxy resin and 2g of phytic acid aqueous solution evenly, then add it to 80g of deionized water, stir magnetically for 30min to make it evenly dispersed, then add 80g of chain-type nano-silica sol and 100g of nanocrystalline fiber to it The mixed powder of plain element and microcrystalline cellulose, magnetic force stirs 10min, then adds the aforementioned hollow silicon dioxide suspension of surfactant of 10g load and magnetic force stirs 10min, obtains superhydrophilic coating, it is sprayed on aforementioned stainless steel wire mesh, room temperature Leave for 1 hour to dry and solidify naturally to obtain a super-hydrophilic stainless steel omentum. The omentum is processed into a s...

Embodiment 2

[0034] Embodiment 2 (adding phytic acid for comparison)

[0035] The 316 stainless steel wire mesh with a mesh size of 15 μm was dried for 10 minutes in absolute ethanol and 10 minutes in deionized water in a water bath at 40°C. Mix 7g of water-based acrylic resin, 1.5g of water-based epoxy resin and 3g of phytic acid aqueous solution and add them into 100g of deionized water, stir magnetically for 30min to make them evenly dispersed, then add 85g of chain-type nano-silica sol and 100g of nanocrystalline The mixed powder of cellulose and microcrystalline cellulose was magnetically stirred for 10min, then the hollow silicon dioxide suspension of the aforementioned surfactant loading of 15g was added and magnetically stirred for 10min to obtain a superhydrophilic coating, which was sprayed on the aforementioned stainless steel wire mesh, Leave it at room temperature for 1 hour to dry and solidify naturally to obtain a super-hydrophilic stainless steel omentum. Rub the omentum w...

Embodiment 3

[0036] Embodiment 3 (macro oil pollution resistance)

[0037] The 316 stainless steel wire mesh with a mesh size of 9 μm was dried for 10 minutes in absolute ethanol and 10 minutes in deionized water in a water bath at 40°C. Mix 3g of water-based acrylic resin, 1g of water-based epoxy resin, 1g of water-based epoxy varnish, and 2g of phytic acid aqueous solution, and then add it to 100g of deionized water, stir magnetically for 30 minutes to make it evenly dispersed, and then add 110g of chain nano silicon The mixed powder of sol and 115g nanocrystalline cellulose and microcrystalline cellulose was magnetically stirred for 10min, then 12g of the aforementioned hollow silica suspension loaded with surfactant was added, and magnetically stirred for 10min to obtain a superhydrophilic coating, which was sprayed Place on the aforementioned stainless steel mesh at room temperature for 1 hour to dry and solidify naturally to obtain a super-hydrophilic stainless steel mesh. The oment...

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PUM

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Abstract

The invention discloses a super-infiltration metal net film and a preparation method and application thereof, and belongs to the field of novel environment-friendly materials. The prepared super-infiltration metal net film is coated with a super-hydrophilic coating, the flatness and compactness of the net film are improved through chain type or bead type nanometer silica sol in the formula of the coating, and nanocrystalline cellulose and other natural organic compounds which are extremely high in hydrophilicity and economical and wide in source are added to enhance the hydrophilicity of the net film; meanwhile, the water-based acrylic resin with a relatively low swelling degree in water and other water-based resin with relatively good hydrophilicity are used for cross-linking and curing, so that the water resistance of the net film is improved; the prepared super-hydrophilic filter element structurally comprises a stainless steel framework, a super-infiltration metal net film, an end cover and a sealing ring from inside to outside in sequence, has the characteristics of good hydrophilicity, strong pollution resistance, excellent water soaking resistance and the like, and can be used for efficiently separating an oil-water mixture.

Description

technical field [0001] The invention relates to the technical field of new environmental protection materials, in particular to a super-wetting metal mesh and its preparation method and application. Background technique [0002] Due to the different wettability of the surface to water and oil, superhydrophilic / oleophobic membranes have received extensive attention in the field of oily wastewater treatment. Superhydrophilic / oleophobic surfaces can exist in two ways: superhydrophilic / oleophobic in air and superhydrophilic / oleophobic underwater. Among them, superhydrophilic / oleophobic materials in air need to achieve the effect of oleophobic in air. The special and complex micro-nano rough structure and chemical groups are difficult to produce and apply on a large scale; while the structure of super-hydrophilic / hydrophobic materials is relatively economical, and only requires pre-wetting the surface with water to form a hydration layer before use. In recent years, with the c...

Claims

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Application Information

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IPC IPC(8): C09D101/04C09D105/14C09D163/00C09D133/00C09D7/61C09D7/63B01D67/00B01D69/02B01D71/26B01D71/46B01D71/48C02F1/40
CPCC09D101/04C09D105/14C09D7/61C09D7/63B01D71/48B01D71/46B01D71/26B01D69/02B01D67/0079C02F1/40B01D2325/36C08L1/04C08L63/00C08L33/00C08K5/521C08K3/36C08L5/14
Inventor 张友法陈俊旭苏有荣刘平
Owner SOUTHEAST UNIV
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