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Micro-filtration membrane and preparation method thereof

A technology of microfiltration membrane and coating membrane, applied in the field of membrane separation, can solve the problems of insufficient acid and alkali resistance, low applicable temperature of microfiltration membrane, and inability to meet the requirements for the use of membrane elements, so as to reduce the cost of storage and transportation and be easy to store. , the effect of easy mass production

Inactive Publication Date: 2018-06-01
安徽普朗膜技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic materials commonly used in the manufacture of microfiltration membranes include cellulose derivatives, polysulfones, polyamides, polyolefins, fluoropolymers, etc. The acid and alkali performance is not enough to meet the requirements of membrane elements under harsh conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the preparation of microfiltration membrane

[0021] (1) Weigh 12g of polyaryletherketone and add it to 68g of N-methylpyrrolidone solvent, stir at 40°C until the polyaryletherketone is completely dissolved, add 2g of PVP-K30, 8g of polyethylene glycol 400, 10g of Ethylene glycol was stirred at 80°C for 6 hours to obtain a casting solution;

[0022] (2) filter the casting solution with a stainless steel strainer, and leave the filtrate for 24 hours to obtain the casting solution for coating;

[0023] (3) Scrape-coat the coating film with a scraper on the 160 μm thick PP non-woven fabric support layer to make a film with a thickness of 100 μm, and then quickly transfer to a coagulation bath of 20% ethanol aqueous solution to solidify and form, Obtain wet plate microfiltration membrane;

[0024] (4) First transfer the wet flat microfiltration membrane to pure water and soak for 3 days, then put it into 30wt% glycerin aqueous solution and soak for 3 days, f...

Embodiment 2

[0026] Embodiment 2: the preparation of microfiltration membrane

[0027] (1) Weigh 20g of polyaryletherketone into 46g of N,N-dimethylacetamide solvent, stir at 60°C until polyaryletherketone is completely dissolved, add 2g of PVP-K15, 32g of polyethylene glycol 400 , stirred at 100°C for 12 hours to obtain a casting solution;

[0028] (2) filter the casting solution with a stainless steel strainer, carry out vacuum degassing to the filtrate, and obtain the casting solution for coating;

[0029] (3) Use a scraper to scrape the casting solution for the coating film on a 240 μm thick PET non-woven support layer to form a film with a thickness of 250 μm, then quickly transfer it to a pure water coagulation bath, and wait for the film to solidify and form. Obtain wet plate microfiltration membrane;

[0030] (4) First transfer the wet plate microfiltration membrane to pure water and soak for 5 days, then put it into 20wt% glycerin aqueous solution and soak for 2 days, finally ta...

Embodiment 3

[0032] Embodiment 3: the preparation of microfiltration membrane

[0033] (1) Weigh 15g of polyaryletherketone and add it to 61g of N,N-dimethylacetamide solvent, stir at 60°C until the polyaryletherketone is completely dissolved, add 4g of PVP-K12, 10g of polyethylene glycol 400 , 10g of ethylene glycol, stirred at 80°C for 8 hours to obtain a casting solution;

[0034] (2) filter the casting solution with a stainless steel strainer, carry out vacuum degassing to the filtrate, and obtain the casting solution for coating;

[0035] (3) Scrape-coat the coating film with a scraper on the PET non-woven fabric support layer with a thickness of 140 μm to make a film with a thickness of 60 μm, and then quickly transfer to 20wt% N, N-dimethylacetamide Solidify and form in the coagulation bath of the aqueous solution to obtain a wet flat microfiltration membrane;

[0036] (4) First transfer the wet plate microfiltration membrane to pure water and soak for 2 days, then put it into 50w...

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Abstract

The invention belongs to the technical field of membrane separation, and concretely relates to a micro-filtration membrane and a preparation method thereof. The micro-filtration membrane is prepared by compounding a membrane casting solution and a non-woven fabric, wherein the membrane casting solution is prepared from the following raw materials in percentage by mass: 10 to 25w% of polyaryletherketone, 1 to 10w% of pore-foaming agent, 5 to 40w% of nonsolvent additive, and 40 to 80w% of solvent. The micro-filtration membrane provided by the invention has good high temperature resistance, acidand alkali resistance and corrosion resistance, and is high in mechanical strength and flux.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a microfiltration membrane and a preparation method thereof. Background technique [0002] Microfiltration is one of the membrane separation technologies driven by pressure. It has the characteristics of high efficiency and low energy consumption, and has a wide range of applications in the fields of biomedicine and sewage treatment. Among them, in the process of separating, purifying, and concentrating pharmaceutical products, high-temperature sterilization is often required, and the microfiltration membrane needs to withstand a sterilization temperature above 120°C. In the process of recycling printing and dyeing wastewater, textile industry wastewater, and hemicellulose lye, the microfiltration membrane is required to have high acid and alkali resistance. However, organic materials commonly used in the manufacture of microfiltration membranes include c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/52B01D69/02B01D67/00
CPCB01D67/0011B01D67/0013B01D69/02B01D71/52
Inventor 俞经福吴立军梁山景
Owner 安徽普朗膜技术有限公司
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