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A Thermally Actuated Hydrogel Nanofiber Bundle and Its Continuous Preparation and Application

A nanofiber and hydrogel technology, which is applied in the field of thermally actuated hydrogel nanofiber bundles and their continuous preparation, can solve the problems of poor thermal actuation performance and achieve excellent actuation performance, high stability, fast response effect

Active Publication Date: 2021-09-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a thermally actuated hydrogel nanofiber bundle and its continuous preparation and application, so as to overcome the problem of poor thermal actuation performance of hydrogel actuation materials in the prior art

Method used

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  • A Thermally Actuated Hydrogel Nanofiber Bundle and Its Continuous Preparation and Application
  • A Thermally Actuated Hydrogel Nanofiber Bundle and Its Continuous Preparation and Application
  • A Thermally Actuated Hydrogel Nanofiber Bundle and Its Continuous Preparation and Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add PU to DMF, and stir at 50°C for 24h; then add PNIPAM, stir at 20°C for 12h; let stand for 24h, based on the total mass of PU, PNIPAM and DMF, the mass fraction of PU is 10%, PNIPAM mass fraction of 20% spinning solution.

[0031] (2) Spinning the spinning solution in step (1) by conjugate electrospinning, using a winder to form a helical structure, and using a roller to collect; the advancing speed is 0.5ml / h, and the inner diameter of the spinning needle is 0.5mm, the relative humidity is 20%, the temperature is 60°C, the positive voltage is 15kV, the negative voltage is -15kV, the distance between the two nozzles is 30cm, the rotation speed of the winder is 800r / min, and the rotation speed of the drum receiver is 3r / min; to obtain nanofiber bundles, carry out ultraviolet light crosslinking, the wavelength used is 365nm, the light time is 6h, and the ambient temperature is 20°C. The obtained helical fiber bundles are composed of oriented PU / PNIPAM composite na...

Embodiment 2

[0038] (1)) Add PU to DMF, and stir at 60°C for 18h; then add PNIPAM, stir at 25°C for 9h; let stand for 30h; based on the total mass of PU, PNIPAM and DMF, the mass fraction of PU is obtained 12%, PNIPAM mass fraction of 18% spinning solution.

[0039](2) Spinning the spinning solution in step (1) by conjugate electrospinning, using a winder to form a helical structure, and using a roller to collect; the advancing speed is 0.8ml / h, and the inner diameter of the spinning needle is 0.8mm, the relative humidity is 30%, the temperature is 50℃, the positive voltage is 18kV, the negative voltage is -18kV, the distance between the two nozzles is 35cm, the rotation speed of the winder is 900r / min, and the rotation speed of the drum receiver is 4r / min; to obtain nanofiber bundles, carry out ultraviolet light crosslinking, the wavelength used is 365nm, the light time is 9h, and the ambient temperature is 25°C. The resulting helically structured fiber bundles consist of oriented PU / PNI...

Embodiment 3

[0041] (1)) Add PU to DMF, and stir at 70°C for 12h; then add PNIPAM, stir at 30°C for 6h; let stand for 36h; among them, take PU, PNIPAM and DMF as the total mass to obtain the mass fraction of PU 15%, PNIPAM mass fraction of 15% spinning solution.

[0042] (2) Spin the spinning solution in step (1) by conjugate electrospinning method, use a winder to form a spiral structure, and use a roller to collect; the advancing speed is 1ml / h, and the inner diameter of the spinning needle is 1mm , the relative humidity is 40%, the temperature is 40°C, the positive voltage is 20kV, the negative voltage is -20kV, the distance between the two nozzles is 40cm, the rotation speed of the winder is 1000r / min, and the rotation speed of the drum receiver is 5r / min min; to obtain nanofiber bundles. For ultraviolet light crosslinking, the wavelength used is 365nm, the light time is 12h, and the ambient temperature is 30°C. The resulting helically structured fiber bundles consist of oriented PU / ...

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Abstract

The invention relates to a heat-activated hydrogel nanofiber bundle and its continuous preparation and application. The fiber bundle has a helical structure. The preparation method includes: preparation of spinning solution, preparation of nanofiber bundles, preparation of hydrogel nanofiber bundles. The hydrogel nanofiber bundle has fast response speed and high stability, and can better meet the needs of actuation. The method is simple and feasible, and has great value for the preparation of actuation materials.

Description

technical field [0001] The invention belongs to the field of actuator materials and its preparation and application, in particular to a thermally actuated hydrogel nanofiber bundle and its continuous preparation method and application. Background technique [0002] Flexible actuators are different from traditional mechanical designs. This is a type of intelligent actuator that can be driven by external fields such as electricity, light, and heat. It has high degrees of freedom and versatility. Its composition is a type of highly deformable Materials or composites, under external stimuli, can produce ideal deformation and output force. Since it can also be combined with functional materials, it has broad application prospects in various fields, such as artificial muscles, cell scaffolds, drug release, sensing, and biodegradable materials. In order to produce the desired deformation, most of these actuators are composed of low elastic modulus materials, or contain liquids in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/16D01F8/10
CPCD01F8/10D01F8/16
Inventor 王宏志孟俊行侯成义李耀刚张青红
Owner DONGHUA UNIV