Antibacterial reverse osmosis composite membrane and preparation method and application thereof

A reverse osmosis composite membrane and technology of reverse osmosis membrane are applied in the field of antibacterial reverse osmosis composite membrane, its preparation and application, which can solve the problems affecting the application and promotion of reverse osmosis composite membrane, and achieve the improvement of anti-pollution performance, prolonging service life, The effect of increasing the salt interception rate

Inactive Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, microbial contamination is still the most common problem in the application of reverse osmosis composite membranes, which seriously affects the application and promotion of reverse osmosis composite membranes.

Method used

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  • Antibacterial reverse osmosis composite membrane and preparation method and application thereof
  • Antibacterial reverse osmosis composite membrane and preparation method and application thereof
  • Antibacterial reverse osmosis composite membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1 prepares antibacterial reverse osmosis composite membrane according to the following steps:

[0061] (1) Preparation of attapulgite-nano-silver composite inorganic antibacterial agent: take attapulgite (AT) through thermal activation and dispersion treatment, be mixed with attapulgite mass concentration and be 1% aqueous suspension, then silver nitrate Solution (AgNO 3 / AT=17 / 100) was added to the attapulgite suspension, stirred magnetically for 1 h at 50°C, and then the attapulgite suspension was spray-dried at 200°C, and the composite powder obtained by spray drying was collected. Finally, the obtained composite powder was calcined in a muffle furnace at 500° C. for 30 minutes to obtain the attapulgite-nanometer silver composite inorganic antibacterial agent. The above-mentioned composite powder prepared by spray drying and the composite powder obtained after calcination were characterized by XRD and TEM respectively, and the results showed that the silv...

Embodiment 2

[0064] Embodiment 2 prepares antibacterial reverse osmosis composite membrane according to the following steps:

[0065] (1) Preparation of attapulgite-nano-silver composite inorganic antibacterial agent: except that the temperature of magnetic stirring after mixing the silver nitrate solution and attapulgite suspension was adjusted to 70°C, the results of other process steps and XRD and TEM characterization were consistent. Same as Example 1.

[0066] (2) Preparation of reverse osmosis composite membrane: the method is the same as in Comparative Example 1.

[0067] (3) Preparation of antibacterial reverse osmosis composite membrane: except that the mass concentration of PVA (alcoholysis degree is 88%) is adjusted to 1% in the coating solution, the mass concentration of glutaraldehyde is adjusted to 0.1%, and the mass concentration of hydrochloric acid is adjusted to Except for 0.1%, other process steps and test conditions are all the same as in Example 1, and the test result...

Embodiment 3

[0068] Embodiment 3 prepares antibacterial reverse osmosis composite membrane according to the following steps:

[0069] (1) Preparation of attapulgite-nano-silver composite inorganic antibacterial agent: Except for adjusting the temperature of magnetic stirring to 90°C after mixing silver nitrate solution and attapulgite suspension, other process steps and XRD and TEM characterization results were consistent. Same as Example 1.

[0070] (2) Preparation of reverse osmosis composite membrane: the method is the same as in Comparative Example 1.

[0071] (3) Preparation of antibacterial reverse osmosis composite membrane: except that the mass concentration of PVA (degree of alcoholysis is 95%) is adjusted to 1.5% in the coating solution, the mass concentration of glutaraldehyde is adjusted to 0.15%, and the mass concentration of hydrochloric acid is adjusted to Except for 0.15%, other process steps and test conditions are all the same as in Example 1, and the test results of the...

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Abstract

The invention relates to an antibacterial reverse osmosis composite membrane, which comprises a reverse osmosis membrane and a polymer cross-linking coating. An antibacterial agent in the polymer cross-linking coating is composite inorganic powder containing nano-silver. In the composite inorganic powder, mass ratio of silver to attapulgite is 10/100-100/100, and particle size of nano-silver is 3-100 nm. The invention also relates to a preparation method of the antibacterial reverse osmosis composite membrane. The antibacterial reverse osmosis composite membrane provided by the invention has advantages of good antibacterial property, long life, etc.

Description

technical field [0001] The invention relates to the technical field of membranes, in particular to an antibacterial reverse osmosis composite membrane. The present application also relates to the preparation method and application of the antibacterial reverse osmosis membrane. Background technique [0002] Reverse osmosis technology is a high-end water treatment technology based on the principle of osmotic pressure. It realizes the separation of water and different solutes. Compared with other technologies, it has a simpler operation method and can effectively remove salts, small molecular acids, aldehydes, Organic substances and colloids such as phenol. The polyamide composite reverse osmosis membrane prepared by the interfacial polymerization reaction between polyamine and polyacyl chloride is the most widely used reverse osmosis membrane at present, with a large permeation flux and good selective separation performance, etc. advantage. In the process of sewage treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/68B01D67/00C02F1/44C02F1/50
Inventor 刘轶群史元腾潘国元张杨严昊徐健郭敏
Owner CHINA PETROLEUM & CHEM CORP
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