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Hollow fiber membrane spinning nozzle and method for preparing hollow fiber membrane

A technology of spinning nozzle and fiber membrane, which is applied in the field of hollow fiber membrane spinning nozzle and preparation of hollow fiber membrane, which can solve the problems of detachment of separation layer and support layer, and achieve the effect of improving production efficiency and ensuring product quality

Active Publication Date: 2017-03-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this spinneret in the process of spinning composite hollow fiber membranes is prone to the problem of detachment of the separation layer and the support layer

Method used

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  • Hollow fiber membrane spinning nozzle and method for preparing hollow fiber membrane
  • Hollow fiber membrane spinning nozzle and method for preparing hollow fiber membrane
  • Hollow fiber membrane spinning nozzle and method for preparing hollow fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A hollow fiber membrane spinning nozzle, such as figure 1 As shown, it is a nozzle body with a solution channel, in which channel I11, channel II12, central liquid pipe 13, liquid collection pipe 14 and spinning forming area 2 are set, as shown in FIG. figure 2 , image 3 , Figure 4 and Figure 5 As shown, the channel I11 is "L" type, and there are four channels, the inlets of which are symmetrically distributed on the upper end surface of the nozzle body, and the end communicates with the upper end of the liquid collection pipe 14 arranged in the center of the lower half of the nozzle body; the channel II12 The inlet is set on the side wall of the nozzle body, and the channel II12 is divided into three sections: the first liquid inlet section 121, the solution buffer zone 122 and the second liquid inlet section 123, the first liquid inlet section 121 is a horizontal channel, and the solution buffer zone 122 is a deep groove-shaped annular area with the liquid coll...

Embodiment 2

[0036] Utilize the nozzle of embodiment 1 to carry out the method for hollow fiber membrane preparation, may further comprise the steps:

[0037] Inject the supporting layer spinning solution, separating layer spinning solution and core solution from channel I11, channel II12 and central liquid pipe 13 respectively, the injection speeds are 2mL / min, 0.2mL / min and 1mL / min respectively, and keep the temperature of each solution at 65°C, the spinning solution for the separation layer and the spinning solution for the supporting layer converge at the junction of the liquid collection pipe 14 and the second liquid inlet section 123, and flow to the bottom of the liquid collection pipe 14, where the spray nozzle of the central liquid pipe 13 Contact with the core liquid, perform solvent exchange, and then form a hollow fiber membrane in the spinning forming zone 2 through the nozzle, and pass air at 65°C through the through hole during spinning, and the flow rate is 400mL / min.

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Abstract

Disclosed are a hollow fiber membrane spinning nozzle and a method for preparing a hollow fiber membrane. The hollow fiber membrane spinning nozzle comprises a nozzle body with a solution channel, wherein a channel I, a channel II, a central liquid pipe, a liquid collection pipe and a spinning shaping area are arranged in the nozzle body, tail ends of the channel I and the channel II are both connected with the liquid collection pipe, the central liquid pipe is arranged at the center of the nozzle body, and the lower half portion of the central liquid pipe passes through the liquid collection pipe and extends to the spinning shaping area. A spinning solution for preparing the hollow fiber membrane is injected into the hollow fiber membrane spinning nozzle respectively through the channel I and the channel II, converges in the liquid collection pipe, and then is contacted with core liquid for solvent exchange, and finally forms the membrane through spinning. According to the hollow fiber membrane spinning nozzle and the method for preparing the hollow fiber membrane, the spinning solution converges well, and a stratification phenomenon of membrane filaments is avoided. A separating layer and a support layer of the hollow fiber membrane prepared by the hollow fiber membrane spinning nozzle are tightly combined, and can not be separated or layered, and the hollow fiber membrane has good selective permeability.

Description

technical field [0001] The invention relates to a spinneret for preparing hollow fiber membranes and a membrane preparation method using the same. Background technique [0002] Hollow fiber membrane is a kind of asymmetric membrane, which has the advantages of high packing density per unit volume, self-supporting effect, high pressure resistance, long life, low equipment investment cost of membrane device, small and simple structure, etc., so high performance ( High permeation flux P, high selectivity α) The preparation of hollow fiber composite membranes has always been one of the key points in the development of membrane technology. For polymer membrane materials, there is usually a trade-off relationship between the permeation flux and the selectivity, the permeation flux is high, the selectivity is low, and vice versa. The performance of the hollow fiber membrane is not only related to raw materials, but also closely related to the material, structure and manufacturing ...

Claims

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Application Information

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IPC IPC(8): D01D5/24D01D5/34
CPCD01D5/24D01D5/34
Inventor 李新学任吉中李晖花开胜赵丹王颖邓麦村
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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