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Blow head for composite spinning and uses thereof

A composite spinning and nozzle technology, applied in the field of membrane separation, can solve the problems of inability to adapt, increase resistance, and low compressive strength

Inactive Publication Date: 2007-07-25
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This double-skin hollow fiber membrane will increase the resistance of the fluid passing through the membrane during use; in addition, the diameter of the hollow fiber membrane spun by the spinneret with double annular holes is relatively large, and its compressive strength is also low, so it cannot adapt to the high operating pressure. High requirements for the preparation of nanofiltration membranes or reverse osmosis membranes with small diameters

Method used

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  • Blow head for composite spinning and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) spinning solution preparation: prepare spinning solution according to the following formula: cortex spinning solution [polysulfone 25% (wt), N, N dimethylacetamide 65% (wt), polyvinylpyrrolidone 9% (wt ), saturated lithium chloride solution 1% (wt)] and supporting layer spinning solution [polysulfone 12% (wt), N, N dimethylacetamide 80% (wt), polyvinylpyrrolidone 8% (wt) ];

[0020] (2) use the double "three C" shape spinneret of the present invention, adopt the composite spinning method to spin the hollow fiber composite membrane base membrane of different diameters, the spinning solution temperature is 45 DEG C, the coagulation bath adopts the water of temperature 25 DEG C, Soak in water for 24 hours after film formation;

[0021] (3) Soak the soaked hollow fiber membrane in 30% glycerol aqueous solution for 24 hours, then take it out and cool it for 24-48 hours, then it can be used as the base membrane of the hollow fiber composite membrane.

[0022] The hollow...

Embodiment 2

[0028] (1) spinning solution preparation: prepare spinning solution according to the following formula: cortex spinning solution [polysulfone 45% (wt), dimethyl sulfoxide 50% (wt), polyvinylpyrrolidone 5% (wt)] and Supporting layer spinning solution [polysulfone 30% (wt), N, N dimethylformamide 60% (wt), polyvinylpyrrolidone 9% (wt), saturated lithium chloride solution 1% (wt)];

[0029] (2) use the double "three C" shape spinneret of the present invention, adopt composite spinning method to spin the hollow fiber composite membrane base membrane of different diameters, spinning solution temperature 50 ℃, coagulation bath adopts the water of temperature 30 ℃, Soak in water for 24 hours after film formation;

[0030] (3) Soak the soaked hollow fiber membrane in 35% glycerol aqueous solution for 24 hours, then take it out and cool it for 24-48 hours, then it can be used as the base membrane of the hollow fiber composite membrane.

[0031] The hollow fiber membrane prepared by th...

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Abstract

The invention relates to a spray head for composite spinning and an application thereof. The spray head comprises a spray head main body, a spray head base seat and a spray head lid; an inner layer casting film liquid cavity is provided between the spray head base seat and the spray head lid, an outer layer casting film liquid cavity is provided between the spray head main body and the spray head base seat; an inner layer casting film liquid inlet communicated with the inner layer casting film liquid cavity is arranged on the spray head lid, an outer layer casting film liquid inlet communicated with the outer layer casting film liquid cavity is arranged on the spray head lid, an inner layer casting film liquid outlet communicated with the inner layer casting film liquid cavity and an outer layer casting film liquid outlet communicated with the outer layer casting film liquid cavity are provided on a bottom face of the spray head base seat respectively, characterised in that the inner layer casting film liquid outlet and the outer layer casting film liquid outlet are homocentric inner, outer three-C shape ring slot outlets. The spray head of the invention can be used in a composite spinning process in a production method of a hollow fiber composite film base film, the produced hollow fiber composite film base film has a high flux and a high mechanical strength.

Description

(1) Technical field [0001] The invention relates to membrane separation technology, specifically a nozzle used for composite spinning and the technology of using the nozzle to prepare hollow fiber membrane composite membrane base membrane. The main classification number of the international patent is intended to be Int.Cl 7 .BOID 71 / 00. (2) Background technology [0002] Membrane separation technology is a new separation technology, which has developed rapidly in recent decades and has been widely used in many fields, and its application fields are constantly expanding. Divided by form, membranes can be divided into flat membranes, tubular membranes, roll membranes and hollow fiber membranes. Among them, hollow fiber membranes are widely used because of their high packing density, simple production process, and miniaturized equipment. Divided by material, membranes can be divided into inorganic membranes, organic polymer membranes and special carbon material membranes, etc....

Claims

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Application Information

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IPC IPC(8): D01D5/28B01D69/08
Inventor 张宇峰刘恩华杜启云肖长发
Owner TIANJIN POLYTECHNIC UNIV