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Stimulating responsiveness porous hollow gel fiber and its producing method

A hollow gel fiber, stimuli-responsive technology, applied in the field of stimuli-responsive porous hollow gel fiber and its manufacturing, can solve the problems of application limitation, poor mechanical properties, etc.

Inactive Publication Date: 2005-03-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the gel contains a large amount of water or solvent, its mechanical properties are poor, and its application is limited.

Method used

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  • Stimulating responsiveness porous hollow gel fiber and its producing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add dry PAN powder with a viscosity-average molecular weight of 90,000 and polyvinylpyrrolidone (PVP) into dimethylacetamide (DMAc), swell at 60°C for 1 hour, and dissolve at 70°C for 1 hour under temperature program control to obtain A PAN-DMAc-PVP solution (PAN:PVP=9:1) containing 14% (weight percent) of polymer was filtered and vacuum defoamed for 8 hours.

[0035] The spinning solution enters the coagulation bath from the inserted tube spinneret through the metering pump, the coagulation bath is an aqueous solution containing 10% (weight percent) DMAc, and the bath temperature is 8°C. After the as-spun fibers were extracted from the coagulation bath, they were introduced into a water bath at 65°C and a water bath at 95°C for secondary stretching, with a total stretching ratio of 8 times. Then washed with water and dried in an oven at 100°C to obtain a PAN-based porous hollow fiber.

[0036] The PAN-based porous hollow fiber prepared by wet spinning is oxidized in a...

Embodiment 2

[0040] Add dry PAN powder with a viscosity-average molecular weight of 50,000 and polyethylene glycol (PEG) with a viscosity-average molecular weight of 20,000 into dimethylformamide (DMF), swell at 60°C for 1 hour under temperature program control, and then Dissolved for 1 hour to prepare a PAN-DMF-PEG solution (PAN:PEG=5:1) containing 17% (weight percent) of polymer, filtered, and vacuum defoamed for 8 hours.

[0041] The spinning solution enters the coagulation bath from the inserted tube spinneret through the metering pump, the coagulation bath is water, and the bath temperature is 70°C. After the as-spun fibers were extracted from the coagulation bath, they were introduced into a water bath at 65°C, a hot water bath and steam at 128°C for secondary stretching, with a total stretching ratio of 5 times. Then washed with water and dried in an oven at 100°C to obtain a PAN-based porous hollow fiber.

[0042] The PAN-based porous hollow fiber prepared by wet spinning is oxidi...

Embodiment 3

[0046] Add dry PAN powder with a viscosity-average molecular weight of 170,000 and polyvinyl alcohol (PVA) with a viscosity-average molecular weight of 1700 into dimethyl sulfoxide (DMSO), and swell at 60°C for 1 hour under temperature program control. Dissolved for 1 hour to prepare a PAN-DMAc-PVA solution (PAN:PVA=9:1) containing 14% (weight percent) of polymer, filtered, and vacuum defoamed for 8 hours.

[0047] The spinning solution enters the coagulation bath from the inserted tube spinneret through the metering pump, the coagulation bath is an aqueous solution containing 5% (weight percent) DMSO, and the bath temperature is 8°C. After the as-spun fibers were extracted from the coagulation bath, they were introduced into a water bath at 65°C and a water bath at 98°C for secondary stretching, with a total stretching ratio of 8 times. Then washed with water and dried in an oven at 100°C to obtain a PAN-based porous hollow fiber.

[0048] The PAN-based porous hollow fiber p...

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Abstract

The present invention relates to one kind of porous hollow gel fiber prepared with polyacrylonitrile (PAN) or its copolymer as material, and through compounding spinning solution with solvent, spinning to form porous hollow fiber and subsequent oxidation and saponification. The porous hollow gel fiber is pH and electric field sensitive and has great deformation rate, great shrinkage force, fast response speed and convenient operation.

Description

technical field [0001] The invention relates to a stimulus-responsive porous hollow gel fiber and a manufacturing method thereof. Background technique [0002] In the mid-1980s, the research upsurge of smart gels spread all over the world, and soon became one of the most potential polymer research directions. Among them, the development of new smart gels has always been one of the frontier hotspots in this field. [0003] As an important class of smart gels, stimuli-responsive gels have been widely concerned by the material circles at home and abroad, and their research and development are in the ascendant. Some foreign researchers have long found that polyvinyl alcohol (PVA) and other polymer gels have good pH response function. In 1950, Katchalsky et al. reported that changing the pH value could make polyacrylic acid (PAA) gel shrink or swell reversibly, so that chemical energy could be directly converted into mechanical energy conveniently. In the early 1990s, Li and T...

Claims

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Application Information

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IPC IPC(8): D01D5/24D01F6/18D01F6/38
Inventor 沈新元杨庆王庆瑞
Owner DONGHUA UNIV
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