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Full-fluorine ion switching fibre and manufacture method thereof

A technology for exchanging fibers and perfluorinated ions, which is applied in the direction of cation exchange materials, fiber types, fiber treatment, etc., can solve the problems of inconvenient preparation of fluorine-containing ion exchange fibers, and achieve fast adsorption, easy elution, and simple preparation steps Effect

Inactive Publication Date: 2008-08-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to prepare fluorine-containing ion-exchange fibers because it is not easy to introduce ion-exchange groups on fluorine-containing fibers

Method used

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  • Full-fluorine ion switching fibre and manufacture method thereof
  • Full-fluorine ion switching fibre and manufacture method thereof
  • Full-fluorine ion switching fibre and manufacture method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Change the terminal group to -SO 2 The perfluorosulfonic acid fiber-forming resin of F is melt-spun, and the spinning temperature is 280° C., and the spinning speed is 500 m / min to obtain a precursor fiber; 2) the precursor fiber is mixed with 6mol / L NaOH solution at 95° C. React for 48 hours, and then with 2mol / LH 2 SO 4 After reacting for 3 hours, a perfluorinated ion exchange fiber containing sulfonic acid groups was obtained. The monofilament strength of the fiber exceeds 30MPa, and the thermal decomposition temperature exceeds 400°C. At 50°C and CuCl 2 The solution is ion-exchanged, and the exchange equilibrium is reached within 2 hours, and the Cu 2+ The exchange capacity reaches 0.4meq / g.

Embodiment 2

[0036] 1) Change the terminal group to -SO 2 The perfluorosulfonic acid fiber-forming resin of Cl carries out melt spinning, and spinning temperature is 235 ℃, and spinning speed is 650m / min, obtains precursor fiber; 2) Precursor fiber is mixed with 6mol / L NaOH liquid After reacting for 50 hours, perfluorinated ion exchange fibers containing sodium sulfonate groups were obtained. The monofilament strength of the fiber exceeds 25MPa, the thermal decomposition temperature exceeds 380°C, and it can be mixed with CaCl at 70°C 2 The solution is ion-exchanged, and the exchange equilibrium is reached within 1.2 hours, and the Ca 2+ The exchange capacity reaches 0.58meq / g.

Embodiment 3

[0038] 1) Change the end group to -COOCH 3 The perfluorocarboxylic acid fiber-forming resin is melt-spun, the spinning temperature is 225°C, and the spinning speed is 350m / min to obtain the precursor fiber; 2) the precursor fiber is reacted with 6mol / L NaOH solution at 90°C 50 hours, and then react with 3mol / L HCl for 3 hours to obtain perfluorinated ion exchange fibers containing carboxylic acid groups. The monofilament strength of the fiber exceeds 25MPa, and the thermal decomposition temperature exceeds 350°C. It is exchanged with NaCl solution at 60°C, and the exchange equilibrium is reached within 1.5 hours. + The exchange capacity reaches 1.02meq / g.

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Abstract

The invention discloses a perfluorinated ion exchange fiber with the following structure and a preparation method thereof. The iron exchange fiber is produced with perfluorinated sulfonic acid fiber forming resin or perfluorinated carboxylic acid fiber forming resin by a melting spinning method, the monofilament strength of which can reach 30Mpa and the use temperature of which can exceed 150 DEG C. The fiber can be used in water purification and filtration, metal iron absorption and catalyzer preparation, etc. In the iron exchange process, the absorption speed of the fiber is fast and the absorption volume can reach over 1meq / g, meanwhile, the washing and taking off of the fiber which can be repeatedly regenerated for use are easy. The preparation method of the fiber is simple, easy for operation and has few technical devices. In addition, m is an integer from 0 to 3, n is a whole number that is more than or equal to 2, x is a whole number from 1 to 20 and y is a whole number from 1 to 5. And R is SO3M or COOM and M is H, Na, K, Li, Mg or Ca.

Description

technical field [0001] The invention relates to a functional polymer material and a preparation method thereof, in particular to a perfluorinated ion exchange fiber and a preparation method thereof, which are used for water purification and filtration, metal ion adsorption, catalyst preparation and the like. Background technique [0002] Ion exchange fiber is a fibrous ion exchange material. Its practical value is that it has a larger specific surface than granular ion exchangers, so it has faster ion exchange and regeneration speeds, but its shortcomings such as low strength and short service life restrict the development and application of this new material. [0003] Fluorine-containing fibers are widely used in many industrial fields due to their excellent characteristics such as heat resistance, corrosion resistance, and high strength, such as the manufacture of sealing letters, conveyor belts, and various fabrics. U.S. Patent No. 2,772,444 discloses a method for manufa...

Claims

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Application Information

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IPC IPC(8): D01F6/32D06M11/36B01J39/20D06M101/22
Inventor 张永明汪利李红李磊
Owner SHANGHAI JIAO TONG UNIV
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