An ultrafiltration composite membrane for treating medium and high temperature wastewater, its preparation method and application
An ultrafiltration composite membrane and composite membrane technology, applied in ultrafiltration, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as the reduction of interception effect, and achieve high water flux, good hydrophilicity and interception rate. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0067] The present invention also provides a kind of preparation method of ultrafiltration composite membrane, comprises the following steps:
[0068] 1) After mixing polyacrylonitrile and the first solvent, an intermediate membrane liquid is obtained. After the intermediate membrane liquid is coated on the base membrane, the carrier compounded with the intermediate membrane is obtained;
[0069] 2) After mixing sulfonated polysulfone, poly(N-isopropylacrylamide), vinylpyrrolidone, diisocyanate and the second solvent again, a cross-linked composite membrane solution is obtained, and then the cross-linked composite membrane solution is coated with Covering on the intermediate membrane of the carrier obtained in the above steps, cross-linking by UV light, and then coagulating to obtain an ultrafiltration composite membrane.
[0070] In the present invention, firstly, the polyacrylonitrile and the first solvent are mixed to obtain the intermediate membrane liquid. After the int...
Embodiment 1
[0096] Add 100 g of organic polyacrylonitrile into 900 g of N,N-dimethylformamide, stir and dissolve, and defoam to obtain the middle layer film liquid. The middle layer film liquid is quantitatively coated on the non-woven fabric, and the solvent is evaporated to form the middle layer. N,N-dimethylformamide (75%) and tetrahydrofuran (25%) were mixed to prepare 900 g of a mixed solvent. Dissolve sulfonated polysulfone (80g), PNIPAM (16g), vinylpyrrolidone (1%), and diisocyanate (3%) in a mixed solvent to form a colloidal raw material and defoam. Obtain the composite layer membrane solution. Quantitatively coat the composite layer film solution on the middle layer, and cross-link using UV light (wavelength: 365nm, 4W) for 6 minutes. The crosslinked membrane was further solidified by immersing in isopropanol. Then wash with water to remove residual organic matter on the surface, and dry at 50°C to obtain a sulfonated polysulfone-PNIPAM composite ultrafiltration membrane.
[...
Embodiment 2
[0102] Add 100 g of organic polyacrylonitrile into 900 g of N,N-dimethylformamide, stir and dissolve, and defoam to obtain the middle layer film liquid. The middle layer film liquid is quantitatively coated on the non-woven fabric, and the solvent is evaporated to form the middle layer. N,N-dimethylformamide (66%) and tetrahydrofuran (34%) were mixed to prepare 900 g of a mixed solvent. Dissolve sulfonated polysulfone (82g), PNIPAM (15g), vinylpyrrolidone (1%), and diisocyanate (2%) in a mixed solvent to form a colloidal raw material and defoam. Obtain the composite layer membrane solution. Quantitatively coat the composite layer film solution on the middle layer, and cross-link using UV light (wavelength: 365nm, 6W) for 5 minutes. The crosslinked membrane was further solidified by immersing in isopropanol. Then wash with water to remove residual organic matter on the surface, and dry at 50°C to obtain a sulfonated polysulfone-PNIPAM composite ultrafiltration membrane.
[...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| pore size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More