High-throughput carbon dioxide separation cellulose ether derivative composite membrane and preparation method thereof
A technology of cellulose ethers and carbon dioxide, applied in separation methods, chemical instruments and methods, educts, etc., can solve the problems of process limitations, cortical defects, and low separation selectivity, and achieve good pressure resistance and fast permeability , the effect of a wide range of sources
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0049] Solution preparation: accurately weigh 92g ethanol (analytical pure) and 8g methylcellulose powder (analytical pure, average degree of substitution 1.85, average degree of polymerization 2000) by electronic balance; Mix in the bottle, seal the bottle mouth, and dissolve with magnetic stirring at 40°C for 24 hours to form a homogeneous solution; use a 100-mesh filter cloth to filter the solution, and then stand at room temperature (the temperature of the film-making room is controlled at 25°C) for 24 hours to defoam. That is, 8wt.% methylcellulose / ethanol coating solution is obtained, which is ready for use.
[0050] Porous support layer pretreatment: self-made polyacrylonitrile asymmetric porous support layer (surface porosity about 68%, average pore diameter about 73nm) was dried in a constant temperature drying oven (50°C) for 8h, cooled to room temperature 25°C; The supporting layer is fixed on the flat plate and placed horizontally for use.
[0051] Scrape coating ...
Embodiment 2
[0059]Solution preparation: accurately weigh 96g ethyl acetate (analytical pure) and 4g hydroxypropyl cellulose powder (analytical pure, average degree of substitution 1.70, average degree of polymerization 1500) by electronic balance; ethyl acetate and hydroxypropyl cellulose Mix in a ground-mouth Erlenmeyer flask, seal the bottle mouth, and dissolve with magnetic stirring at 60°C for 12 hours to form a homogeneous solution; use a 100-mesh filter cloth to filter the solution, and then statically Set aside for 24 hours for defoaming to obtain a 4wt.% hydroxypropyl cellulose / ethyl acetate coating solution for use.
[0060] Porous support layer pretreatment: The purchased polypropylene asymmetric porous support layer (surface porosity about 78%, average pore diameter about 185nm) is soaked in acetone to remove oily pollutants, transferred to deionized water to remove acetone and other hydrophilic substances, After natural air drying, dry in a constant temperature drying oven (50...
Embodiment 3
[0069] Solution preparation: accurately weigh 88g of tetrahydrofuran (analytical grade) and 12g of ethyl cellulose powder (analytical grade, average degree of substitution 2.25, average degree of polymerization 1200) by electronic balance; Mix in medium, seal the bottle mouth, and dissolve with magnetic stirring at 30°C for 24 hours to form a homogeneous solution; use a 100-mesh filter cloth to filter the solution, and then stand at room temperature (the temperature of the film-making room is controlled at 25°C) for 24 hours to defoam, that is A 12wt.% ethylcellulose / tetrahydrofuran coating solution was obtained for use.
[0070] Porous support layer pretreatment: homemade polyvinylidene fluoride asymmetric porous support layer (surface porosity about 60%, average pore diameter about 25nm) was dried in a constant temperature drying oven (50°C) for 8h, cooled to room temperature 25°C; A good support layer is fixed on a flat plate and placed horizontally for use.
[0071] Scrap...
PUM
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| degree of polymerization | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More