Double hydrophilic polyethylene ultrafiltration membrane and preparation method thereof
A polyethylene and hydrophilic technology, applied in the field of double hydrophilic polyethylene ultrafiltration membrane and its preparation, to achieve the effects of uniform pore size, stable extrusion process parameters, improved flux and regulation and retention performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0064] A method for preparing a double hydrophilic polyethylene ultrafiltration membrane, prepared according to the following steps:
[0065] Add 0.2% vinyltriethoxysilane and 10.8% polyethylene (Mn=500,000) to 84% white oil in batches after oven drying , 0.4% cetyltrimethylammonium bromide, 0.3% antioxidant 168 and 0.5% DCP were heated and stirred at 180° C. for 4 hours in a vacuum state to obtain a casting solution.
[0066] Add the mixed solution of water and THF with a volume ratio of 1:1 to tetraethyl orthosilicate, stir at a high speed for 6 hours at room temperature to form a 2% tetraethyl orthosilicate sol, and titrate with 1mol / L HCL to pH=1 .
[0067] The casting solution is extruded into a specific mold through a twin-screw extruder (150 rpm), and the sol is slowly poured into the mold to undergo a gel reaction process. After 5 times transverse stretching, it was extracted in dichloromethane. After heat-setting at 60°C for 15 minutes, the double-hydrophilic polye...
Embodiment 2
[0069] A method for preparing a double hydrophilic polyethylene ultrafiltration membrane, prepared according to the following steps:
[0070] Add 0.2% vinyltriethoxysilane and 34.8% polyethylene (Mn=500,000) to 60% diphenyl ether in batches after oven drying Sugar, 0.4% cetyltrimethylammonium bromide, 0.3% antioxidant 168 and 0.1% DCP were heated and stirred at 200° C. for 4 hours under vacuum to obtain a casting solution.
[0071] Add the mixed solution of water and THF with a volume ratio of 1:1 to tetraethyl orthosilicate, stir at a high speed at room temperature for 6 hours to form a 2% tetraethyl orthosilicate sol, and titrate with 1mol / L HCL to pH=2 .
[0072] The casting solution is extruded into a specific mold through a twin-screw extruder (150 rpm), and the sol is slowly poured into the mold to undergo a gel reaction process. After 15 times transverse stretching, it was extracted in dichloromethane. After heat-setting at 80°C for 10 minutes, the double-hydrophilic...
Embodiment 3
[0074] A method for preparing a double hydrophilic polyethylene ultrafiltration membrane, prepared according to the following steps:
[0075] 2% vinyl tri-tert-butyl silane and 20% polyethylene (Mn=1 million) are added in batches to 73% diphenyl ether after oven drying Chitosan, 0.4% methylcellulose, 0.3% antioxidant 1010 and 0.5% DCP were heated and stirred under vacuum at 200°C for 4 hours to obtain a casting solution.
[0076] Add the mixed solution of water and THF with a volume ratio of 1:2 to tetraethyl orthosilicate, stir at a high speed at room temperature for 8 hours to form a 4% tetraethyl orthosilicate sol, and titrate with 1mol / L HCL to pH=2 .
[0077] The casting solution is extruded into a specific mold through a twin-screw extruder (200 rpm), and the sol is slowly poured into the mold to undergo a gel reaction process. After 15 times transverse stretching, it was extracted in dichloromethane. After heat-setting at 80°C for 10 minutes, the double-hydrophilic p...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More