Antibacterial ultra-filtration membrane and preparation method thereof

A technology of ultrafiltration membrane and membrane casting solution, which is applied in the field of membrane materials, can solve the problem that litsea cubeba oil cannot be released in a long-term and sustained manner, and achieve the effect of prolonging the effective antibacterial time and preventing rapid volatilization

Inactive Publication Date: 2019-01-04
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Claims
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Problems solved by technology

[0004] In order to solve the technical problem that litsea cubeba oil cannot be released in a long-term and sustained manner in ultrafiltration membranes, the present invention proposes a bacteriostatic ultrafiltration membrane and its preparation method

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  • Antibacterial ultra-filtration membrane and preparation method thereof
  • Antibacterial ultra-filtration membrane and preparation method thereof
  • Antibacterial ultra-filtration membrane and preparation method thereof

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preparation example Construction

[0040] The preparation method of the litsea cubeba oil microcapsules in embodiment 1-3 is as follows:

[0041] T1, configure the gum arabic solution: dissolve the gum arabic powder in water, and configure the gum arabic solution with a concentration of 4%;

[0042] T2. Prepare hydroxypropyl-β-cyclodextrin solution: dissolve hydroxypropyl-β-cyclodextrin in water, and configure a 4% hydroxypropyl-β-cyclodextrin solution;

[0043] T3, stirring and mixing: mix the gum arabic solution and the hydroxypropyl-β-cyclodextrin solution in a ratio of 1:2, add Litsea cubeba oil in a ratio of 1:3 to the core wall under stirring, and stir until the mixture is uniform. Obtain an emulsion;

[0044] T4. High-pressure homogeneous emulsification: homogenize the mixed emulsion for 12 minutes under a pressure of 500 bar;

[0045] T5, spray drying: at the inlet wind speed of 80%, the feed pump speed of 15%, and the inlet temperature of 170°C, the mixed emulsion is spray-dried, and the litsea cubeb...

Embodiment 1

[0047] Each component prepares the casting solution of the bacteriostatic ultrafiltration membrane according to the following weight ratio: 13 parts of PES, 10 parts of polyvinylpyrrolidone, 5 parts of PEG4005, 2 parts of litsea cubeba oil microcapsules, 70 parts of N-methyl-2-pyrrolidone , put the above materials into a three-necked flask, control the heating temperature to 50°C, stir at a stirring speed of 300r / min for 8h, and then place it in a vacuum oven at 25°C for 6h to remove air bubbles and form a uniform and transparent casting solution. Under the condition that the temperature is 25°C and the humidity is 70%, the casting solution is cast on a clean glass plate, and the film scraping machine is used to scrape the film on the cast glass plate to obtain the casting solution containing a thickness of 0.5mm. Glass plate; volatilize the glass plate in the air for 10 seconds, and then immerse it in the coagulation bath for 6 hours to obtain the detached bacteriostatic ultra...

Embodiment 2

[0049]Each component prepares the casting solution of the bacteriostatic ultrafiltration membrane according to the following weight ratio: 13 parts of PES, 10 parts of polyvinylpyrrolidone, 5 parts of PEG4005 parts, 4 parts of litsea cubeba oil microcapsules, 68 parts of N-methyl-2-pyrrolidone . Put the above materials into a three-necked flask, control the heating temperature to 50°C, stir at a stirring speed of 300r / min for 8h, and then place it in a vacuum oven at 25°C for 6h to remove air bubbles and form a uniform and transparent casting solution. Under the condition that the temperature is 25°C and the humidity is 70%, the casting solution is cast on a clean glass plate, and the film scraping machine is used to scrape the film on the cast glass plate to obtain the casting solution containing a thickness of 0.5mm. Glass plate; volatilize the glass plate in the air for 10 seconds, and then immerse it in the coagulation bath for 6 hours to obtain a detached bacteriostatic u...

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Abstract

The invention discloses an antibacterial ultra-filtration membrane is prepared by casting solution. The casting solution comprises, by weight, 8-20 parts of PES (polyether sulfone), 5-15 parts of pore-forming agents, 0.1-5 parts of litsea cubeba oil microcapsules and 60-85 parts of solvents. The invention further discloses a preparation method of the antibacterial ultra-filtration membrane. The preparation method includes the steps: S1 preparing the casting solution according to the weight ratio of the components, and uniformly stirring the casting solution at the temperature of 30-80 DEG C; S2 performing defoaming on the casting solution acquired in the step S1 in a vacuum drying oven with the temperature of 25-40 DEG C for 4-6h; S3 pouring the casting solution acquired in the step S2 onto a clean glass plate under the condition of the temperature of 15-30 DEG C and the humidity of 60-80%, scraping a membrane to obtain the glass plate of the casting solution with the thickness of 0.3-0.6mm, performing volatilization in the air for 5-30s, and soaking the glass plate in coagulation bath for 2-20h to obtain the split ultra-filtration membrane. The antimicrobial time of litsea cubebaoil in the antibacterial ultra-filtration membrane can be effectively prolonged, and long-acting slow release of the antibacterial ultra-filtration membrane in the litsea cubeba oil is achieved.

Description

technical field [0001] The invention relates to the technical field of membrane materials, in particular to a bacteriostatic ultrafiltration membrane and a preparation method thereof. Background technique [0002] In recent decades, membrane separation, as one of the most energy-saving material separation and concentration technologies, has developed very rapidly. Its application has gradually expanded from simple seawater desalination, preparation of pure water and ultrapure water to environmental protection, chemical industry, medicine, Food, aerospace and other fields. Ultrafiltration is a membrane separation technology between microfiltration and nanofiltration. Colloidal substances, emulsions, bacteria and some macromolecular compounds in the fluid are blocked. It is a simple physical screening process. Existing ultrafiltration membranes are easily polluted by microorganisms such as bacteria during use, thereby affecting their service life and efficiency. Therefore, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D69/02B01D67/00B01D61/14
CPCB01D61/145B01D67/0002B01D69/02B01D71/68B01D2325/36B01D2325/48
Inventor 杨艳红李湘洲周军张胜
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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