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Production method of cellosilk enhanced compound hollow fiber membrane

A technology for enhancing compounding and manufacturing methods, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of weak interface binding force, poor hydrophilicity, easy pollution, etc. Strong stain resistance and reproducible results

Active Publication Date: 2010-09-22
XIAMEN LEEBAM MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the hollow fiber membrane mainly has the following problems in the process of use: (1) the strength of the membrane is low, and it is easy to break; (2) the hydrophilicity is poor, and it is easy to pollute; (3) the water flux and interception rate of the membrane cannot be improved at the same time
The compatibility between the above-mentioned polymer fibers and PVDF is poor, so the interfacial binding force between the fiber braided support tube and the PVDF membrane in the prepared hollow fiber composite microporous membrane is weak

Method used

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  • Production method of cellosilk enhanced compound hollow fiber membrane
  • Production method of cellosilk enhanced compound hollow fiber membrane
  • Production method of cellosilk enhanced compound hollow fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1: See figure 1 and figure 2 , 7 kg of dimethylacetamide, 2 kg of polyethersulfone polymer, 0.5 kg of polyethylene glycol, and 100 g of lithium chloride were stirred and dissolved evenly to make a fiber filament reinforced composite hollow fiber membrane inner membrane casting solution , using the dry-wet hollow fiber spinning process, the casting liquid and the core liquid (the core liquid is pure water) are extruded through the spinning head, passed through the external coagulation bath water tank (the coagulant is pure water), and drawn in the winding On the wheel, the inner layer membrane 1 of the fiber reinforced composite hollow fiber membrane is formed. Stir and dissolve 100 grams of polyurethane and 900 grams of dimethylformamide evenly to prepare a bonding solution for fiber reinforced composite hollow fiber membranes. 7 kg of dimethylacetamide, 2 kg of PVDF polymer, 0.5 kg of polyethylene glycol, 100 g of lithium chloride, and 100 g of Tween-80 were...

Embodiment 2

[0057] Example 2: 7 kilograms of dimethylacetamide, 2 kilograms of polyethersulfone polymer, 0.5 kilogram of polyethylene glycol, and 100 grams of lithium nitrate were stirred and dissolved evenly to make a fiber filament reinforced composite hollow fiber membrane inner membrane casting Membrane liquid, using dry-wet hollow fiber spinning process, the casting liquid and core liquid (the core liquid is pure water) are extruded through the spinning head, and the external coagulation bath tank (the coagulant is pure water) is drawn in the On the winding wheel, the inner membrane of the fiber reinforced composite hollow fiber membrane is formed. Stir and dissolve 100 grams of polyurethane and 900 grams of dimethylformamide evenly to prepare a bonding solution for fiber reinforced composite hollow fiber membranes. Mix 7 kg of dimethylacetamide, 2 kg of PVDF polymer, 0.5 kg of polyvinylpyrrolidone, 100 g of lithium chloride, 100 g of Tween-80, and 100 g of Span-80, stir and dissolve...

Embodiment 3

[0058] Example 3: 7 kilograms of dimethylacetamide, 2 kilograms of polyethersulfone polymer, 0.5 kilogram of polyethylene glycol, and 100 grams of lithium chloride were stirred and dissolved evenly, and the inner layer membrane of the fiber reinforced composite hollow fiber membrane was made Casting liquid, using dry-wet hollow fiber spinning process, the casting liquid and core liquid (core liquid is pure water) are extruded through the spinning head, passed through the external coagulation bath (coagulant is pure water), and drawn On the winding wheel, the inner layer of the fiber reinforced composite hollow fiber membrane is formed. Stir and dissolve 100 grams of polyurethane and 900 grams of dimethylformamide evenly to prepare a bonding solution for fiber reinforced composite hollow fiber membranes. 7 kg of dimethylacetamide, 2 kg of PVDF polymer, 0.5 kg of polyethylene glycol, 100 g of lithium chloride, and 400 g of Tween-80 were stirred and dissolved evenly to form the o...

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Abstract

The invention discloses a production method of a cellosilk enhanced compound hollow fiber membrane, which comprises the following steps: by adopting a liquid phase transfer hollow spinning process, firstly, preparing polymer (such as polyether sulfone or polysulfone and the like), solvent and a pore-forming agent into a membrane casting liquid to produce a hollow fibrous membrane; tightly attaching the cellosilk treated by adhesive solution to the outer surface of the prepared hollow fiber membrane; secondly, producing polyvinylidene fluoride or mixture of other polymers, solvent and pore-forming agent into coating liquid of an outer compound layer of the compound hollow fiber membrane; coating the costing liquid outside the hollow fiber membrane to which the cellosilk is attached by using a coating machine to form a compound outer layer; thirdly, feeding into an outer coagulating bath, wherein the solvent, the pore-forming agent and the like in the coating liquid enters liquid phase and the polymers in the coating liquid are precipitated to a polymer compound hollow fiber outer layer due to phase transfer; and finally producing a hydrophilic cellosilk enhanced compound hollow fiber membrane with high strength and high flux.

Description

technical field [0001] The invention discloses a method for manufacturing a fiber silk-reinforced composite hollow fiber membrane, which belongs to the technical field of composite fiber membrane manufacturing according to the International Patent Classification (IPC). Background technique [0002] Hollow fiber membranes are widely used in filtration or dialysis in various fields such as industrial and municipal sewage treatment, drinking water purification, reclaimed water reuse, food processing and biomedicine. Fiber-reinforced composite membrane design can be used to study and select materials such as inner layer, coating layer and fiber filaments, and it is easy to obtain high-strength, high-flux separation membranes. Therefore, fiber-reinforced composite hollow fiber membrane technology has become a high-performance separation technology. An important development direction in membrane preparation technology. [0003] At present, the hollow fiber membrane mainly has the...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D67/00
Inventor 黄德昌王俊川江良涌曾沿鸿张燕玲
Owner XIAMEN LEEBAM MEMBRANE TECH
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