Unlock instant, AI-driven research and patent intelligence for your innovation.

Acid-resistant composite nanofiltration membrane and preparation method thereof

A composite nanofiltration membrane, interfacial polymerization technology, applied in chemical instruments and methods, membranes, ultrafiltration, etc., can solve problems such as low water flux and poor acid resistance

Active Publication Date: 2021-04-30
HUNAN OVAY TECH CO LTD
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the acid-resistant composite nanofiltration membranes used in the market have the problems of low water flux and poor acid resistance.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Acid-resistant composite nanofiltration membrane and preparation method thereof
  • Acid-resistant composite nanofiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An acid-resistant composite nanofiltration membrane, comprising a supporting base layer and a functional layer obtained by interfacial polymerization on the supporting base layer, the functional layer including the following raw material components: amine substances, aqueous phase additives, cyanuric chloride, multi-component Acyl chloride, oil phase solvent and deionized water, the amines include piperazine and ethyleneamines.

[0029] The ethyleneamine substance is triethylenetetramine.

[0030] The polybasic acid chloride is trimesoyl chloride.

[0031] Described water phase additive is sodium lauryl sulfate;

[0032] The oil phase solvent is n-hexane.

[0033] The supporting base layer includes a non-woven fabric and a porous ultrafiltration layer, the material of the non-woven fabric is polypropylene, and the material of the porous ultrafiltration layer is polyethersulfone.

[0034] The preparation process of the support base layer is as follows: Weigh 75g of po...

Embodiment 2

[0047] The difference from Example 1 is that the ethyleneamines are diethylenetriamine.

Embodiment 3

[0049] The difference from Example 1 is that the ethyleneamines are tetraethylenepentamine.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an acid-resistant composite nanofiltration membrane, comprising a support base layer and a functional layer obtained by interfacial polymerization on the support base layer, wherein the functional layer comprises the following raw material components: an amine substance, an aqueous phase additive, melamine chloride, polybasic acyl chloride, an oil phase solvent and deionized water, and the amine substances comprise piperazine and ethylidene amine substances. The water flux of the prepared acid-resistant composite nanofiltration membrane reaches 26.39 LMH before being soaked in a hydrochloric acid solution with the mass fraction of 10%, the rejection rate of divalent salt reaches 97.71%, the water flux can reach 28.22 LMH after being soaked in the hydrochloric acid solution with the mass fraction of 10%, and the rejection rate of the divalent salt can still reach 96.28%. The preparation method is simple and easy to implement, short in technological process and low in cost, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of nanofiltration membrane preparation, in particular to an acid-resistant composite nanofiltration membrane and a preparation method thereof. Background technique [0002] The excellent separation performance of composite nanofiltration membranes has been widely concerned by academia and industry. The composite nanofiltration membrane can not only separate the gradient cut-off of different inorganic salts, but also accurately separate substances with a molecular weight of 200-1000. [0003] Composite nanofiltration membranes are often used to separate and purify food and biological products. Since composite nanofiltration membranes are extremely susceptible to contamination by biomolecules and microorganisms, they are often cleaned with acidic cleaning solutions. This requires composite nanofiltration membranes to have certain acid resistance. Thereby increasing the use times of the composite nanofiltratio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D69/10B01D61/14B01D61/02B01D67/00
CPCB01D69/12B01D61/027B01D69/10B01D69/105B01D61/145B01D69/125B01D2323/12Y02A20/131
Inventor 喻慧路宏伟彭博胡群辉廖骞贺妍博彭军
Owner HUNAN OVAY TECH CO LTD