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Method for preparing hydrogel having magnetism and temperature synergistic stimulus-responding

A co-stimulation, hydrogel technology, applied in rayon manufacturing, fiber chemical characteristics, fiber types, etc., can solve the problems of slow response rate, single stimulus response, etc., to achieve temperature response rate improvement, simple process, and reduced size. Effect

Active Publication Date: 2019-02-01
晋江瑞碧科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ubiquitous problem of responsive smart hydrogels is that the stimulus response is relatively single and the response rate is slow

Method used

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  • Method for preparing hydrogel having magnetism and temperature synergistic stimulus-responding
  • Method for preparing hydrogel having magnetism and temperature synergistic stimulus-responding
  • Method for preparing hydrogel having magnetism and temperature synergistic stimulus-responding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1)PU / Fe 3 o 4 Preparation of Magnetic Composite Nanofibers

[0036] 0.1987g FeCl 2 4H 2 O and 0.5404 g FeCl 3 ·6H 2 O was added to 25 g of distilled water, stirred and dissolved by magnetic force at 25°C, then 8 mL of 1 mol / L ammonia water was added, and reacted at 25°C for 3 hours. 3 o 4 Nanoparticles, particle diameter less than 10nm. Add 1g PU into the mixed solvent of 10g DMF and 5g THF, stir magnetically at 60°C for 2h to dissolve completely, and add 0.05g Fe 3 o 4 Nanoparticles are added to the above solution, and stirred by high-speed magnetic force to form a quenching mixed solution. Quenching the quenching mixture in a -40°C refrigerator for 2 hours. After the end, add distilled water to the system to remove DMF and THF. Change the distilled water every 6 hours for 4 times, and finally freeze-dry to obtain PU / Fe 3 o 4 Magnetic composite nanofibers.

[0037] 2) PU-g-PNIPAm / Fe 3 o 4 Preparation of Composite Nanofiber Hydrogels

[0038] Dissolve 1 g...

Embodiment 2

[0043] 1)PU / Fe 3 o 4 Preparation of Magnetic Composite Nanofibers

[0044] 0.1987g FeCl 2 4H 2 O and 0.5404 g FeCl 3 ·6H 2 O was added to 25 g of distilled water, stirred and dissolved by magnetic force at 25°C, then 8 mL of 1 mol / L ammonia water was added, and reacted at 25°C for 4 hours. 3 o 4 Nanoparticles, particle diameter less than 10nm. Add 1g PU into the mixed solvent of 12g DMF and 4g THF, stir magnetically at 60°C for 2h to dissolve completely, and add 0.05g Fe 3 o 4 Nanoparticles are added to the above solution, and stirred by high-speed magnetic force to form a quenching mixed solution. Quenching the quenching mixture in a refrigerator at -30°C for 2 hours. After the end, add distilled water to the system to remove DMF and THF. Change the distilled water every 6 hours for 4 times, and finally freeze-dry to obtain PU / Fe 3 o 4 Magnetic composite nanofibers.

[0045] 2) PU-g-PNIPAm / Fe 3 o 4 Preparation of Composite Nanofiber Hydrogels

[0046] Dissolve ...

Embodiment 3

[0051] 1)PU / Fe 3 o 4 Preparation of Magnetic Composite Nanofibers

[0052] 0.1987g FeCl 2 4H 2 O and 0.5404 g FeCl 3 ·6H 2 O was added to 25 g of distilled water, stirred and dissolved by magnetic force at 25°C, then 8 mL of 1 mol / L ammonia water was added, and reacted at 25°C for 5 hours. 3 o 4 Nanoparticles, particle diameter less than 10nm. Add 1g PU into the mixed solvent of 14g DMF and 3g THF, stir magnetically at 60°C for 2h to make it completely dissolve, and then add 0.08g Fe 3 o 4 Nanoparticles are added to the above solution, and stirred by high-speed magnetic force to form a quenching mixed solution. Quench the quenching mixture in a -30°C refrigerator for 2.5 hours. After the end, add distilled water to the system to remove DMF and THF. Change the distilled water every 6 hours for 4 times, and finally freeze-dry to obtain PU / Fe 3 o 4 Magnetic composite nanofibers.

[0053] 2) PU-g-PNIPAm / Fe 3 o 4 Preparation of Composite Nanofiber Hydrogels

[0054] ...

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Abstract

The invention relates to a preparation method for preparing hydrogel having magnetism and temperature synergistic stimulus-responding. The method comprises the following steps: firstly preparing Fe3O4magnetic nanoparticles by a coprecipitation method, and adding Fe3O4 magnetic nanoparticles into a PU solution, preparing the PU / Fe3O4 magnetic composite nanofibers by a thermally induced phase separation method, and finally, grafting N-isopropylacrylamide to the PU fiber membrane by ultraviolet radiation grafted polymerization. The large specific surface area and high porosity of the PU nanofibers are used, the hydrogel is beneficial to the diffusion of water molecules during swelling and shrinkage, and the response rate of the hydrogel is greatly improved. The prepared PU-g-PNIPAm / Fe3O4 composite nanofiber hydrogel has dual magnetism and temperature responsiveness by using the temperature sensitivity of N-isopropylacrylamide and the magnetic properties of Fe3O4.

Description

technical field [0001] The invention relates to a preparation method of magnetic-temperature co-stimulus-responsive hydrogel, which belongs to the technical field of polymer hydrogel. Background technique [0002] Hydrogel is a moderately cross-linked polymer gel with a three-dimensional space network structure that can swell but not dissolve in water. The volume and related performance changes that can respond to external stimuli can quickly swell in water and absorb water to reach saturation. Environmentally responsive smart hydrogels have important application value in many fields, responding to small changes in environmental information (such as pH, temperature, light, electric field, magnetic field, etc.), resulting in corresponding volume changes or changes in other physical and chemical properties. The common problem of responsive smart hydrogels is that the stimulus response is relatively single and the response rate is slow. Compared with single-stimuli-responsive...

Claims

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Application Information

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IPC IPC(8): D06M14/30D06M15/285D06M11/79D01F6/94D01F1/10D06M101/38
CPCD01F1/10D01F6/94D06M11/79D06M14/30D06M15/285D06M2101/38
Inventor 赵瑨云付兴平徐婕刘淑琼
Owner 晋江瑞碧科技有限公司
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