High-performance environmentally-friendly composite film for water treatment

An environmentally friendly water, high-performance technology, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. problems, to achieve the effect of improving mechanical properties and excellent mechanical properties

Inactive Publication Date: 2019-08-30
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention is dedicated to overcoming the problems of poor mechanical properties, low water permeability and poor absorption effect on pollutants of biomass-based water treatment membranes, and provides a biomass composite water treatment membrane

Method used

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  • High-performance environmentally-friendly composite film for water treatment

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Effect test

Embodiment 1

[0033] A high-performance and environmentally friendly composite membrane for water treatment is composed of a four-layer structure, including a bottom layer, a connection layer, a treatment layer and a surface layer in sequence. The bottom layer is a polymer porous support material, the connecting layer is a porous triacetate cellulose coating layer, the treatment layer is a cross-linked biomass hybrid membrane, and the surface layer is a porous biomass membrane.

[0034] The polymer porous support material is a polyamide-based polymer porous material.

[0035] The ratio of the pore area of ​​the cross-section of the polymer porous support material to the membrane area is 35%, and the pore diameter is between 50-500 microns.

[0036] The connection layer is a porous triacetate cellulose membrane layer, the thickness of which is 120 microns, and the pore size is between 2-10 microns.

[0037] The preparation of the cross-linked biomass hybrid film is to use chitosan as the ma...

Embodiment 2

[0056] A high-performance and environmentally friendly composite membrane for water treatment is composed of a four-layer structure, including a bottom layer, a connection layer, a treatment layer and a surface layer in sequence. The bottom layer is a polymer porous support material, the connecting layer is a porous triacetate cellulose coating layer, the treatment layer is a cross-linked biomass hybrid membrane, and the surface layer is a porous biomass membrane.

[0057] The polymer porous support material is a polysulfone polymer porous material.

[0058] The ratio of the pore area of ​​the cross-section of the polymer porous support material to the membrane area is 32%, and the pore diameter is between 50-300 microns.

[0059] The connecting layer is a porous triacetate cellulose film layer, the thickness of which is 135 microns, and the pore size is between 3-10 microns.

[0060] The preparation of the cross-linked biomass hybrid film is to use chitosan as the main raw m...

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Abstract

The invention belongs to the technical field of water treatment, in particular to a four-layer structural film material. The film material successively comprises a bottom layer, a connecting layer, atreatment layer and a surface layer, wherein the bottom layer is a high molecular porous supporting material, the connecting layer is a cellulose triacetate porous film layer, the treatment layer is acrosslinked biomass hybrid film, and the surface layer is a porous biomass film. The treatment layer and the surface layer are bonded through a C=C crosslinking reaction. The composite film preparedby the invention has relatively large water flux, and can filter microorganisms and organic matters such as heavy metals and bacteria in water. The film substance is environmentally-friendly and has agood application prospect.

Description

technical field [0001] The invention belongs to the technical field of water treatment membranes, and in particular relates to an environment-friendly water treatment membrane material with high water flux and which can be used for filtering various pollutants. Background technique [0002] Membrane treatment of wastewater is a new technology. For a long time, water treatment membranes have been divided into microfiltration, ultrafiltration, nanofiltration, reverse osmosis, active transport, electrodialysis, etc. according to the pores of the membrane. Materials that can be used to prepare water treatment membranes include cellulose and its derivatives, polyvinylidene fluoride, polysulfone, polypropylene, polyethylene, polyacrylonitrile, polyamide, etc. Most of these materials are hydrophobic, and the hydrophobicity of the membrane The surface lacks the functional groups required for the separation process. A technology that uses biomass as a water treatment membrane has e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/08B01J20/24B01J20/28B01J20/30C02F1/28C02F1/44C02F101/20C02F101/30
CPCB01D67/0002B01D67/0079B01D69/02B01D69/125B01D71/08B01D2325/12B01D2325/24B01J20/24B01J20/28035B01J20/3085B01J2220/4825C02F1/288C02F1/44C02F2101/20C02F2101/308
Inventor 周跃云
Owner HUNAN UNIV OF TECH
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