Process for preparing composite hollow fiber membrane
A fiber membrane and hollow technology, which is applied in the field of preparation of hydrophilic composite hollow fiber porous membrane, can solve the problems of narrow selection range of composite materials and solvents, failure to obtain high permeation flux, and high post-treatment process requirements, and achieve The effect of easy membrane separation pore size, high membrane strength and membrane separation function, and easy composite layer thickness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0067] Stir 500 grams of calcium carbonate 2 micron particles at high speed, and evenly disperse them in 5 kg of dimethylacetamide, then add 2 kg of dimethylacetamide, 2 kg of polyvinylidene fluoride resin, 500 grams of polyethylene glycol, 100 G Tween-20, stir and dissolve evenly, and make a hollow fiber composite layer spinning solution. 7 kg of dimethylacetamide, 2 kg of polyethersulfone resin, and 500 g of polyethylene glycol were stirred and dissolved evenly to prepare a hollow fiber base membrane spinning solution. Using the dry-wet hollow fiber spinning process, the two kinds of spinning stock solution and core solution (the core solution is 70v% DMA aqueous solution) are simultaneously extruded through the composite spinning nozzle, and drawn on the winding wheel through the external coagulation bath tank , forming a composite hollow fiber. The coagulant in the external coagulation bath is water. Calcium carbonate in polyvinylidene fluoride hollow fiber is removed by...
Embodiment 2
[0070] Stir 500 grams of aluminum oxide 20-80 nanometer particles at high speed, and evenly disperse them in 7 kilograms of N-methylpyrrolidone solvent, then add 2 kilograms of polyvinylidene fluoride resin, 500 grams of polyvinyl pyrrolidone, 100 grams of Tween- 80, stir and dissolve evenly, and make hollow fiber cortex spinning solution. 7 kg of dimethylacetamide, 2 kg of polyethersulfone resin, and 500 g of polyethylene glycol were stirred and dissolved evenly to prepare a spinning solution for the hollow fiber support layer. Using the dry-wet hollow fiber spinning process, the two kinds of spinning stock solution and core solution (the core solution is 70v% DMA aqueous solution) are simultaneously extruded through the composite spinning nozzle, and drawn on the winding wheel through the external coagulation bath tank , forming a composite hollow fiber. The coagulant in the coagulation bath is water. Use NaOH aqueous solution to remove Al2O3 in polyvinylidene fluoride hol...
Embodiment 3
[0073] Stir 800 grams of calcium carbonate 2 micron particles at high speed, and evenly disperse them in 5 kg of dimethylacetamide, then add 1.8 kg of dimethylacetamide, 1.8 kg of polyvinylidene fluoride resin, 780 grams of polyvinylpyrrolidone, 20 grams Fluorine FC-4, stir and dissolve evenly, and make hollow fiber cortex spinning solution. 7 kg of dimethylacetamide, 2 kg of polyethersulfone resin, and 500 g of polyethylene glycol were stirred and dissolved evenly to prepare a spinning solution for the hollow fiber support layer. Using the dry-wet hollow fiber spinning process, the two kinds of spinning stock solution and core liquid water are simultaneously extruded through the composite spinning nozzle, passed through the external coagulation bath, and drawn on the winding wheel to form a composite hollow fiber. The coagulant in the coagulation bath is water. Calcium carbonate in polyvinylidene fluoride hollow fibers was removed with hydrochloric acid solution. Under the ...
PUM
Property | Measurement | Unit |
---|---|---|
Outer diameter | aaaaa | aaaaa |
Wall thickness | aaaaa | aaaaa |
Layer thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com