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Disk tube type nanofiltration membrane and preparation process thereof

A preparation process and nanofiltration membrane technology, which is applied in the field of membrane separation, can solve the problems that nanofiltration membranes cannot be applied to disk-type reverse osmosis membrane systems, and achieve good filtration performance, high desalination rate, and improved membrane performance.

Active Publication Date: 2018-03-13
深圳市富滤业技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the nanofiltration membrane cannot be applied to the disc-type reverse osmosis membrane system, thus proposing a disc-tube nanofiltration membrane applicable to the disc-type reverse osmosis membrane system and its preparation craft

Method used

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  • Disk tube type nanofiltration membrane and preparation process thereof
  • Disk tube type nanofiltration membrane and preparation process thereof
  • Disk tube type nanofiltration membrane and preparation process thereof

Examples

Experimental program
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Embodiment 1

[0027] This embodiment provides a disc-tube nanofiltration membrane, which includes a polyethersulfone base film layer and a modified separation layer arranged on the surface of the base film layer, the modified separation layer is composed of nano-oxide, amphoteric gemini surface Active agent and polypiperazine amide, the mass ratio of described nano-oxide, amphoteric gemini surfactant and polypiperazine amide is 1:1:100, and in the present embodiment, described nano-oxide is nano titanium dioxide, and its Particle diameter is 80nm, and the general structural formula of described amphoteric gemini surfactant is:

[0028]

[0029] Wherein, R1 and R2 are saturated hydrocarbon groups, and in this embodiment, the R1 is CH 3 (CH 2 ) 2 -, the R2 is CH 2 CH 3 -, the molecular formula of the amphoteric gemini surfactant is: CH 3 (CH 2 ) 2 CHSO 3 HCOO (CH 2 ) 3 NBr(CH 3 ) 2 CH 2 CH 3 .

[0030] The present embodiment also provides a kind of technique for preparing de...

Embodiment 2

[0036] This embodiment provides a disc-tube nanofiltration membrane, which includes a polyethersulfone base film layer and a modified separation layer arranged on the surface of the base film layer, the modified separation layer is composed of nano-oxide, amphoteric gemini surface Active agent and polypiperazine amide composition, the mass ratio of described nano-oxide, amphoteric gemini surfactant and polypiperazine amide is 100:200:400, and in the present embodiment, described nano-oxide is nano silicon dioxide , its particle diameter is 100nm, and the general structural formula of described amphoteric gemini surfactant is:

[0037]

[0038] Wherein, R1 and R2 are saturated hydrocarbon groups, and in this embodiment, the R1 is CH 3 -, the R2 is CH 3 CH 2 CH 2 -, the molecular formula of the amphoteric gemini surfactant is: CH 3 CHSO 3 HCOO (CH 2 ) 3 NBr(CH 3 ) 2 (CH 2 ) 2 CH 3 .

[0039] The present embodiment also provides a kind of technique for preparing d...

Embodiment 3

[0045] This embodiment provides a disc-tube nanofiltration membrane, which includes a polyethersulfone base film layer and a modified separation layer arranged on the surface of the base film layer, the modified separation layer is composed of nano-oxide, amphoteric gemini surface Active agent and polypiperazine amide composition, the mass ratio of described nano-oxide, amphoteric gemini surfactant and polypiperazine amide is 25:60:250, and in the present embodiment, described nano-oxide is nano graphene oxide , its particle diameter is 60nm, and the structural general formula of described amphoteric gemini surfactant is:

[0046]

[0047] Wherein, R1 and R2 are saturated hydrocarbon groups, and in this embodiment, the R1 is CH 3 -, the R2 is CH 3 -, the molecular formula of the amphoteric gemini surfactant is: CH 3 CHSO 3 HCOO (CH 2 ) 3 NBr(CH 3 ) 2 CH 3 .

[0048] The present embodiment also provides a kind of technique for preparing described disc-tube nanofiltr...

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Abstract

The invention discloses a disk tube type nanofiltration membrane which comprises a base membrane layer and a modified separation layer arranged on the surface of the base membrane layer, wherein the modified separation layer is prepared from nano oxide, an amphoteric gemini surfactant and polypiperazide; the amphoteric gemini surfactant can carry out surface treatment on the nano oxide to uniformly disperse the nano oxide and achieve a good modification effect; meanwhile, during interface polymerization, migration of the amphoteric gemini surfactant enables the nano oxide to be dispersed on the surface of the membrane more uniformly, so that the use amount of the nano oxide is reduced, and the production cost of a filtration membrane material is reduced. Furthermore, due to improvement onthe dispersivity of the nano oxide and upgrading of the performance of the amphoteric gemini surfactant to the membrane, the obtained nanofiltration membrane is high in filtration performance, can beapplied to a disk tube type system, and is good in filtration effect, high in water flux and high in desalinization rate. The invention further provides a preparation process of the disk tube type nanofiltration membrane. The preparation process is simple in step, mild in condition and suitable for industrial batch production.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a disc-tube nanofiltration membrane and a preparation process thereof. Background technique [0002] In recent years, high-concentration wastewater produced by industrial production has become a serious pollution source that damages the environment. These wastewater cannot be reused or discharged. Therefore, it is urgent to find new separation and purification technologies to solve the problem of treatment and discharge of this type of wastewater. With the development of economy and technology, the technology of disc tube reverse osmosis membrane (DTRO membrane) has gradually attracted people's attention in recent years and has been more and more widely used. The disc-tube reverse osmosis membrane is a membrane module specially used to treat high-concentration sewage. Its core component is the disc-tube membrane membrane column. When in use, the reverse os...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D69/04B01D69/02B01D67/00
CPCB01D61/027B01D67/0079B01D69/02B01D69/04B01D71/82
Inventor 和磊磊沈剑明崔海波张彦平易思利唐康
Owner 深圳市富滤业技术有限公司
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