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Hollow fiber, dope solution composition for forming a hollow fiber, and method for manufacturing a hollow fiber using the same

A fiber, hollow technology, applied in the manufacture of hollow filaments, chemical instruments and methods, single-component synthetic polymer rayon, etc., can solve the problems of difficulty in obtaining separation and permeability, and membrane performance degradation.

Inactive Publication Date: 2011-06-15
IUCF HYU (IND UNIV COOP FOUNDATION HANYANG UNIV)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, commercially available polymeric materials for gas separation with membrane properties (in the case of air separation, oxygen permeability of 1 Barrer or higher and oxygen / nitrogen selectivity of 6.0 or higher ) is limited to a few types
This is because: there are considerable limitations in improving polymer structures, and the greater compatibility between permeability and selectivity makes it difficult to obtain separation and permeability beyond predetermined upper bounds
[0014] Furthermore, conventional polymeric membrane materials have limitations and disadvantages in permeation and separation properties because they undergo decomposition and aging after long-term exposure to high-pressure and high-temperature processes or after exposure to gas mixtures containing hydrocarbons, aromatics, and polar solvents, thus causing a considerable decrease in the inherent membrane performance

Method used

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  • Hollow fiber, dope solution composition for forming a hollow fiber, and method for manufacturing a hollow fiber using the same
  • Hollow fiber, dope solution composition for forming a hollow fiber, and method for manufacturing a hollow fiber using the same
  • Hollow fiber, dope solution composition for forming a hollow fiber, and method for manufacturing a hollow fiber using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0412] A hollow fiber including polybenzoxazole represented by Chemical Formula 51 was prepared through Reaction Scheme 3 below using a doping solution composition for forming a hollow fiber containing polyhydroxyamic acid.

[0413] [Reaction Scheme 3]

[0414]

[0415] (1) Preparation of polyhydroxyamic acid

[0416] Add 36.6g (0.1mol) of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane and 44.4g (0.1mol) of 4,4'-(hexafluoroisopropene)diphthalic anhydride into 189 g (70 wt%) of N-methylpyrrolidone (NMP) and then reacted at 15° C. for 4 hours to obtain pale yellow viscous polyamic acid.

[0417] (2) Preparation of doping solution composition for forming hollow fiber

[0418] The obtained polyamic acid was added to 5 wt% of tetrahydrofuran as an additive without removing the solvent to prepare a uniform doping solution composition for forming a hollow fiber.

[0419] (3) Preparation of hollow fiber

[0420] The doping solution composition for forming a hollow fiber was ...

Embodiment 2

[0424] A hollow fiber including polybenzothiazole represented by Chemical Formula 52 was prepared through the following reaction using a doping solution composition for forming a hollow fiber containing polythioamic acid.

[0425] [chemical formula 52]

[0426]

[0427] A hollow fiber including polybenzothiazole represented by the above Chemical Formula 52 was prepared in the same manner as in Example 1, except that the starting material, 20.8 g (0.1 mol) of 2,5-diamino-1,4- Benzothiophene dihydrochloride and 44.4 g (0.1 mol) of 4,4'-(hexafluoroisopropylene) diphthalic anhydride were reacted to prepare a polyamic acid containing a thiol group (-SH).

[0428] The hollow fiber thus prepared had a weight average molecular weight of 14,500. As a result of FT-IR analysis, polybenzothiazole at 1484cm -1 (C-S) and 1404cm -1 The characteristic bands of (C-S) were not detected in polyimide. The hollow fiber has a free volume fraction of 0.26 and a interplanar spacing (d-spacing)...

Embodiment 3

[0431] A hollow fiber including polypyrrone represented by Chemical Formula 53 was prepared by the following reaction using a doping solution composition for forming a hollow fiber containing polyaminoamic acid.

[0432][chemical formula 53]

[0433]

[0434] A hollow fiber comprising polypyrrone represented by the above Chemical Formula 53 was prepared in the same manner as in Example 1, except that the starting materials, 21.4 g (0.1 mol) of 3,3'-diaminobenzidine and 44.4 g (0.1mol) of 4,4′-(hexafluoroisopropene) diphthalic anhydride was reacted to prepare 2 ) of polyamic acid.

[0435] The hollow fiber thus prepared had a weight average molecular weight of 18,000. As a result of FT-IR analysis, the polypyrrone at 1758cm -1 (C=O) and 1625cm -1 The characteristic frequency band of (C=N) was not detected in polyimide. The hollow fiber has a free volume fraction of 0.28 and a interplanar spacing (d-spacing) of 630 pm.

[0436] The interplanar spacing (d-spacing) was de...

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Abstract

Provided is a hollow fiber with a structure including a cavity positioned at the center of the hollow fiber, macro-pores present in the periphery of the cavity, and meso-pores and pico-pores present in the periphery of the macro-pores, wherein the pico-pores are connected to each other in a three-dimensional manner to form a three-dimensional network. The hollow fiber contains a polymer derived from a polyamic acid, wherein the polyamic acid includes repeating units prepared from aromatic diamines and dianhydrides containing at least one functional group present in an ortho-position relative to an amine group.

Description

technical field [0001] The present disclosure relates to hollow fibers, doping solution compositions for forming hollow fibers, and methods of making hollow fibers using the doping solution compositions. Background technique [0002] Membranes must meet the requirements of excellent thermal, chemical and mechanical stability, high permeability and high selectivity so that they can be commercialized and then applied in various industries. The term "permeability" as used herein is defined as the rate at which a substance permeates through a membrane. The term "selectivity" as used herein is defined as the permeation ratio between two different gas components. [0003] Based on separation performance, membranes can be classified into reverse osmosis membranes, ultrafiltration membranes, microfiltration membranes, gas separation membranes, and the like. Based on shape, membranes can be roughly classified into flat sheet membranes, rolled membranes, composite membranes, and hol...

Claims

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Application Information

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IPC IPC(8): D01D5/24D01D5/247D01F6/80C08L79/08C08K5/42C08K5/05C08K5/15
CPCB01D67/00B01D53/22B01D53/228B01D2325/025B01D69/08D01F6/74C08G73/22B01D69/087C08G73/18B01D2257/11C08J2379/08B01D71/64B01D53/00Y02C20/20C08J7/08C08G73/1042C08G75/32D01D5/247D01F1/08Y02C10/10B01D2257/108B01D2257/504B01D2325/02D01D5/24B01D2257/7025B01D2257/102C08G73/10B01D2257/104C08L79/08Y02P20/156Y02C20/40Y02P20/151Y02P70/62B01D2325/0283
Inventor 郑哲豪韩尚勳李永茂朴浩范
Owner IUCF HYU (IND UNIV COOP FOUNDATION HANYANG UNIV)
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