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Composite nano-filter membrane especially used in integrated intelligent water purifying tap and preparation method thereof

A composite nanofiltration membrane, an integrated technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem that the low flux of nanofiltration membrane cannot be applied to intelligent water purification faucets, and the deep purification of tap water cannot be realized. , Purify the small size of the faucet, etc., to meet the needs of water production volume and water quality, good water taste, and large flux

Inactive Publication Date: 2017-04-05
BEIJING ORIGIN WATER FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Purifying faucets have small dimensions and a very limited filling capacity of filter materials. Most of the filter materials used are activated carbon and PP cotton. The filtration accuracy is poor, and it is impossible to achieve deep purification of tap water.
However, the low flux of existing nanofiltration membranes cannot be applied to smart water purification faucets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The invention provides an integrated intelligent water purification faucet dedicated composite nanofiltration membrane and a preparation method thereof. Composite nanofiltration membrane is used as a fast water purification model for faucets. It still has high flux under low pressure. It can selectively remove harmful substances in tap water, retain small molecular organic substances and low-priced inorganic salts that are beneficial to the body, and the water tastes good. It can reduce the hardness of water, and the container will not produce scale after boiling water.

[0045] A method for preparing a composite nanofiltration membrane dedicated to an integrated intelligent water purification faucet. The nanofiltration membrane is a composite membrane, including a non-woven support layer, an ultra-thin intermediate support layer and a high-performance separation layer.

[0046] An all-in-one composite nanofiltration membrane dedicated to intelligent water purification ...

Embodiment 2

[0050] Special composite nanofiltration membrane, including functionalized ultra-thin support layer, ultra-thin polymer intermediate support layer and ultra-thin dense separation layer.

[0051] The functional ultra-thin support layer is a non-woven fabric containing resin fibers, which can absorb calcium and magnesium ions, with a thickness of 40 μm and an air permeability of about 2.4cc / c㎡.s; The polysulfone ultrafiltration layer is coated and formed by a slit extrusion coating machine. The thickness can reach 15 μm, and the pore size distribution is between 0.5 μm and 0.1 μm; the ultra-thin and dense separation layer is a polyamide membrane of piperazine system. The water-phase monomer includes piperazine, additives, acid absorbents, and humectants. The concentration of piperazine is 1%, the additive is nano-graphene oxide, and the content is 500ppm. The acid absorbent is organic amine, and the content is 2%. The agent is a small molecule alcohol with a content of 1%; the p...

Embodiment 3

[0054] Special composite nanofiltration membrane, including functionalized ultra-thin support layer, ultra-thin polymer intermediate support layer and ultra-thin dense separation layer.

[0055] The functional ultra-thin support layer is a non-woven fabric containing resin fibers, which can absorb calcium and magnesium ions, with a thickness of 57 μm and an air permeability of about 2.1cc / c㎡.s; The polysulfone ultrafiltration layer is coated and formed by a slit extrusion coating machine. The thickness can reach 25 μm, and the pore size distribution is between 0.05 μm and 1 μm; the ultra-thin and dense separation layer is a polyamide membrane of the piperazine system. Phase monomers include piperazine, additives, acid absorbents, and humectants. The concentration of piperazine is 0.7%, the additive is nano-graphene oxide, and the content is 500ppm. The acid absorbent is organic amine, and the content is 2.5%. The pore-preserving agent is Small molecule alcohols, the content is...

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Abstract

A composite nano-filter membrane especially used in an integrated intelligent water purifying tap and a preparation method thereof. The invention belongs to the technical field of sewage treatment. The nano-filter membrane is a composite membrane which includes a non-woven cloth support layer, an ultrathin middle support layer, and an ultrathin compact separation layer. The non-woven cloth support layer is connected to one side of the ultrathin middle support layer. The ultrathin compact separation layer is connected to the other side of the ultrathin middle support layer. A filter core has smaller size, more functions and larger throughput, and is better in purifying effect. The filter membrane is high in throughput even under low pressure, and can selectively remove harmful substances in tap water and maintain the small-molecular organic substances and low-valent inorganic salts that are beneficial to body. The filtered water has good taste, and no water scale is generated in a container after boiling water, thereby satisfying the demands on yield and quality of produced water. At present, the main researching direction of high-throughput nano-filter membranes is modified separation layers, and there is little researching work of improving the throughput and separation performance of the nano-filter membranes from the angle of the support layer and middle layer.

Description

technical field [0001] The invention relates to a special composite nanofiltration membrane for an integrated intelligent water purification faucet and a preparation method thereof, belonging to the technical field of sewage treatment. Background technique [0002] Nanofiltration membrane is a new membrane separation technology between ultrafiltration and reverse osmosis, with its low operating pressure, high water flux, high rejection rate, while retaining the advantages of small molecular organic compounds and low-priced inorganic salts that are beneficial to the body , has been widely used in many fields. The preparation of high rejection and high flux nanofiltration membranes has always been a research hotspot, but how to achieve the balance between flux and rejection has always been a difficult problem. The main direction of current research is to change the formula system or achieve it through post-treatment, but the flux range of the nanofiltration membrane is limite...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D69/10B01D67/00C02F1/44
CPCB01D69/12B01D67/0079B01D69/10C02F1/442
Inventor 陈亦力张庆磊彭文娟李锁定汪洋张翠苗
Owner BEIJING ORIGIN WATER FILM TECH
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