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Preparation method of bundled hollow fiber membrane

A fiber membrane and hollow technology, which is applied in the field of preparation of end-type hollow fiber membranes, can solve the problems of disassembly and assembly, difficult cleaning, high price, and large waste of raw materials, so as to improve the application field and application range, and reduce maintenance and replacement costs. , the effect of improving production efficiency

Inactive Publication Date: 2019-12-24
苏州五颗星特种超滤膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems with this spinneret: (1) It is difficult to disassemble and clean; (2) The waste of raw materials is large; (3) It is difficult to repair after damage; (4) There is a problem of uneven filament production
Problems with these membrane materials: (1) lining / fascia tends to fall off and peel off; (2) easy to dissolve and form cavities; (3) inorganic tubular membrane preparation process is cumbersome, difficult to operate, expensive, and permeable Poor performance and low practicability

Method used

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  • Preparation method of bundled hollow fiber membrane
  • Preparation method of bundled hollow fiber membrane
  • Preparation method of bundled hollow fiber membrane

Examples

Experimental program
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Effect test

specific Embodiment 1

[0022] Specific embodiment 1, a method for preparing an end-type hollow fiber membrane, the steps are: the following components are calculated in parts by weight,

[0023] (1) Select polymer materials: 10 parts; additives: 1 part; mixed solvent: 60 parts; heat and dry the polymer materials and additives in an oven, and remove water from the mixed solvent through activated molecular sieves;

[0024] (2) Dissolving the polymer material and additives in the mixed solvent, then heating the mixture composed of the polymer material, additives and mixed solvent to a molten state, stirring to form a casting solution;

[0025] (3) Extrude the casting solution prepared in step (2) through a plum-blossom spinneret and enter it into the coagulation solution for cooling to undergo phase inversion. The fiber membrane after phase inversion undergoes post-treatment of pore preservation and air-dries at room temperature for 2 days Until the membrane is completely dry, thereby forming an end-ty...

specific Embodiment 2

[0028] Specific embodiment two, please refer to Figure 1-4 , a method for preparing an end-type hollow fiber membrane, the steps are: the following components are calculated in parts by weight,

[0029] (1), select polymer materials: 15 parts; additives: 6 parts; mixed solvent: 70 parts;

[0030] Heat and dry in the box, and the mixed solvent is dehydrated by activated molecular sieve;

[0031] (2) Dissolving the polymer material and additives in the mixed solvent, then heating the mixture composed of the polymer material, additives and mixed solvent to a molten state, stirring to form a casting solution;

[0032] (3) Extrude the casting solution prepared in step (2) through a plum-blossom spinneret and enter it into the coagulation solution for cooling to undergo phase inversion. The fiber membrane after phase inversion is post-treated to preserve pores, and air-dried at room temperature for 4 days Until the membrane is completely dry, thereby forming an end-type hollow fi...

specific Embodiment 3

[0036] Specific embodiment three: a kind of preparation method of end-type hollow fiber membrane, its step is: the following components are counted in parts by weight,

[0037] (1) Select polymer materials: 20 parts; additives: 10 parts; mixed solvent: 80 parts;

[0038] Heat and dry in the box, and the mixed solvent is dehydrated by activated molecular sieve;

[0039] (2) Dissolving the polymer material and additives in the mixed solvent, then heating the mixture composed of the polymer material, additives and mixed solvent to a molten state, stirring to form a casting solution;

[0040] (3) Extrude the casting solution prepared in step (2) through a plum-blossom spinneret and enter it into the coagulation solution to cool to undergo phase inversion. The fiber membrane after phase inversion is post-treated to preserve pores, and air-dried at room temperature for 5 days Until the membrane is completely dry, thereby forming an end-type hollow fiber membrane;

[0041]The polym...

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Abstract

The invention relates to the technical field of preparation of hollow fiber membranes, in particular to a preparation method of a bundled hollow fiber membrane. The pure water flux of the bundled hollow fiber membrane prepared by the method is reduced compared with that of a single-core membrane, but the tensile stress of the same is increased by more than one time compared with that of the single-core membrane. In the actual application process, the bundled hollow fiber membrane is not liable to being flattened under high pressure, can hold relatively large flux and is not liable to wire breakage, so that the application field and the application range of the bundled hollow fiber membrane are greatly improved; meanwhile, the maintenance and replacement cost of products can be reduced, andthe service life of the products can be prolonged. Besides, the preparation method of the bundled hollow fiber membrane is simple in process, the mechanical strength of the hollow fiber membrane is improved, the loss of raw materials is reduced, the production efficiency of the hollow fiber membrane is improved, the cost is reduced, and the hollow fiber membrane is good in water permeability andsuitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of hollow fiber membrane preparation, in particular to a preparation method of an end-type hollow fiber membrane. Background technique [0002] In the actual production process of hollow fiber membranes, in order to improve the production efficiency of enterprises, almost all enterprises adopt single-hole spinneret combination or multi-hole spinnerets arranged in a line and designed in the form of multiple rows in parallel. Problems of this spinneret: (1) Difficult to disassemble, assemble and clean; (2) Large waste of raw materials; (3) Difficult to repair after damage; (4) There is a problem of uneven filament production. The strength of the single-hole hollow fiber membrane is low, and it is easy to break the filament during use. In order to solve this problem, lining / fascia membranes began to appear, adding inorganic materials to the ingredients to increase the self-supporting strength of the membrane f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D67/00B01D69/08
CPCB01D71/06B01D69/082B01D67/0009B01D69/088
Inventor 白仁碧李焱陈慧
Owner 苏州五颗星特种超滤膜科技有限公司
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