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Reinforced capillary-pipe film and preparing method

A capillary membrane and capillary technology, which is applied in the field of membrane separation, can solve the problems of failing to give the membrane bursting pressure and anti-burst performance indicators, not involving braids, difficult to judge and other problems, achieving good tensile effect, strong anti-pollution ability, Easy to clean and regenerate effect

Active Publication Date: 2009-10-07
安徽森诺膜技术有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In its patent application, the specific characteristics of the braid are not involved. The pore size of the membrane is limited to the range of ultrafiltration membranes, and the performance indicators such as the burst pressure of the membrane that characterize the blast resistance of the membrane are not given. It is difficult to judge whether it has been solved. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The mass percentage formula of the coating liquid is: 15wt% polyethersulfone; 15wt% polyethylene glycol; 5wt% polyvinyl acetate with a degree of hydrolysis of 50% and 65wt% dimethylacetamide, and mix the various components, Stir at 70° C. for 8 hours, and stand at room temperature for 24 hours for degassing to obtain a uniform coating solution.

[0035] The manufacturing process of the reinforced capillary membrane: the polyester fiber filament bundle with a fineness of 750tdx is selected, and the capillary with an inner diameter of 0.9mm / outer diameter of 1.8mm is compositely braided by a braiding machine, and the density of the braided capillary gradually decreases from the inside to the outside to form a gradient density capillary. The inner / outer density ratio is about 3.0, and the inner surface of the capillary has a mesh size of 10 microns. The number of braided capillary cilia is controlled below 2 per meter. The hot water shrinkage rate of the capillary braid i...

Embodiment 2

[0038] The mass percentage formula of the coating liquid is: 20wt% polyethersulfone; 20wt% polyethylene glycol; 0.5% OP-10 surfactant and 59.5wt% dimethylacetamide. The above components were mixed, stirred at 70° C. for 10 hours, and left to stand at room temperature for 36 hours for defoaming to obtain a uniform coating solution.

[0039]The manufacturing process of the reinforced capillary membrane: the polyester fiber filament bundle with a fineness of 850tdx is selected, and the capillary with an inner diameter of 1.0mm / outer diameter of 1.8mm is compositely braided by a braiding machine. The density of the braided capillary gradually decreases from the inside to the outside to form a gradient density capillary. The inner / outer density ratio is about 3.5, and the inner surface of the capillary has a mesh size of 15 microns. The number of braided capillary cilia is controlled below 2 per meter. The hot water shrinkage rate of the capillary braid is 2%. Lead the pre-woven ...

Embodiment 3

[0042] The mass percentage formula of the coating liquid is: 10wt% polyethersulfone; 15wt% polyethylene glycol; 10wt% polyvinylpyrrolidone and 65wt% dimethylformamide. The above components were mixed, stirred at 70° C. for 6 hours, and left to stand at room temperature for 24 hours to obtain a uniform coating solution.

[0043] The manufacturing process of the reinforced capillary membrane: select polyester fiber filament bundles with a fineness of 900tdx, and use a braiding machine to weave capillaries with an inner diameter of 1.0mm / outer diameter of 1.85mm. The density of the braided capillary gradually decreases from the inside to the outside to form a gradient density capillary. The inner / outer density ratio is about 4, and the inner surface of the capillary has a mesh size of 5 microns. The number of braided capillary cilia is controlled below 2 per meter. The hot water shrinkage rate of the capillary braid is 2%. Lead the pre-woven capillary into the coating module, c...

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Abstract

A reinforced capillary membrane and a preparation method thereof. The reinforced capillary membrane is composed of a capillary braid support and a membrane, and the density of the capillary braid changes in a gradient. The coating liquid is coated on the braid and penetrated into the capillary-shaped braid, and the method of wet phase inversion is adopted to coagulate into a film in a coagulation bath to form a reinforced capillary film. The coating solution is prepared by mixing 5-35 parts by weight of polymer, 0-35 parts of additive, 30-80 parts of solvent and 1-40 parts of porogen. The reinforced capillary membrane has high mechanical strength, good tensile effect, high permeability of pure water, and can adapt to high-strength and large-flow backwashing operations. In particular, peeling of the membrane during use can be avoided. The manufacturing method of the invention has the characteristics of advanced technology, rapidity, stable quality, safety and environmental protection. The reinforced capillary membrane prepared by the invention can be made into a column type membrane device or an immersed type membrane device, and is suitable for water purification, waste water treatment and reuse.

Description

【Technical field】 [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a reinforced capillary membrane used as a microporous filtration membrane or an ultrafiltration membrane and a preparation method thereof. Suitable for water purification and wastewater treatment and reuse. 【Background technique】 [0002] Membrane separation technology is a separation technology widely used in the separation, concentration and purification of substances in liquid or gaseous media. The membrane wall used for liquid separation is densely covered with extremely fine micropores. When the raw liquid passes through one side of the membrane under pressure, the solvent and low-molecular solutes pass through the membrane wall to become permeate, while the larger molecular solutes are retained by the membrane, thus achieving The purpose of material separation or purification. Membrane technology is an advanced separation technology with many adv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/08B01D69/04B01D69/10
Inventor 陈玉海李大维
Owner 安徽森诺膜技术有限公司
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