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A hybrid hydrogel actuator actuated by near-infrared light and its preparation method and actuation method

A near-infrared light and hydrogel technology, applied in the field of intelligent actuator materials, can solve problems such as the inability to transport objects across obstacles, and achieve the effects of flexible and adjustable application range, excellent performance, and controllable conditions

Active Publication Date: 2021-03-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the study of gel actuators, the shape memory gel actuator can return from the temporary shape to the original shape, which is a kind of hydrogel actuator that has been widely studied at present, but the current hydrogel actuator Generally, the device only realizes simple actions such as lifting and grabbing, and cannot realize complex processes such as transporting objects across obstacles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Disperse 0.02 g of graphene oxide, 0.4 g of artificial hectorite, and 0.7108 g of acrylamide monomer in 20 mL of boiled and cooled deionized water at room temperature, stir to obtain a uniform dispersion, and pass through nitrogen to remove the dispersion. Oxygen; then add 0.408 mL potassium persulfate aqueous solution (20 mg / mL) and 0.005 mL tetramethylethylenediamine and stir evenly to obtain a hydrogel reaction liquid; add the reaction liquid into the mold and seal it, and place it at 20 Polymerized at ℃ for 10 hours to obtain a hybrid hydrogel; its tensile strength at break was 60 kPa, and its elongation at break was 1800%; the prepared hybrid hydrogel was cut into long strips, stretched 3 times and placed in After drying at 40 °C for 2 hours, one end of the dried hydrogel was placed in water to re-swell for 1 min, and then the other end was bent to obtain a hybrid hydrogel actuator. Soak one end of the hydrogel actuator in water to fix it, dry the other end to load...

Embodiment 2

[0031] Disperse 0.05 g of graphene oxide, 0.6 g of artificial hectorite, and 0.7108 g of acrylamide monomer in 20 mL of boiled and cooled deionized water at room temperature, stir to obtain a uniform dispersion, and pass through nitrogen to remove the dispersion. Oxygen; then add 0.68 mL potassium persulfate aqueous solution (20 mg / mL) and 0.01 mL tetramethylethylenediamine and stir evenly to obtain a hydrogel reaction liquid; add the reaction liquid into the mold and seal it, and place it at 20 Polymerized at ℃ for 24 hours to obtain a hybrid hydrogel; its tensile strength at break was 100 kPa, and its elongation at break was 1680%; the prepared hybrid hydrogel was cut into long strips, stretched 7 times and placed in After drying at 80 °C for 1 hour, one end of the dried hydrogel was re-swelled in water for 5 min, and then the other end was bent to obtain a hybrid hydrogel actuator. Soak one end of the hydrogel actuator in water to fix it, dry the other end to load the objec...

Embodiment 3

[0033]Disperse 0.08 g of graphene oxide, 1.0 g of artificial hectorite, and 0.7108 g of acrylamide monomer in 20 mL of boiled and cooled deionized water at room temperature, stir to obtain a uniform dispersion, and pass through nitrogen to remove the dispersion. Oxygen; then add 0.816 mL potassium persulfate aqueous solution (20 mg / mL) and 0.01 mL tetramethylethylenediamine and stir evenly to obtain a hydrogel reaction liquid; add the reaction liquid into the mold and seal it, and place it at 20 Polymerized at ℃ for 48 hours to obtain a hybrid hydrogel; its tensile strength at break was 150 kPa, and its elongation at break was 1500%; the prepared hybrid hydrogel was cut into long strips, stretched 10 times and placed in After drying at 120°C for 0.5 hours, one end of the dried hydrogel was placed in water to re-swell for 10 minutes, and then the other end was bent to obtain a hybrid hydrogel actuator. Soak one end of the hydrogel actuator in water to fix it, dry the other end ...

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Abstract

The invention discloses a near-infrared light actuating hybrid hydrogel actuator as well as a preparation method and an actuating method thereof. The preparation method comprises the steps: utilizingartificial hectorite as a crosslinking agent, introducing graphene oxide, preparing physical crosslinking hydrogel through acrylamide monomer polymerization, then stretching and drying and performingsecondary water absorption treatment on a part of gel to obtain the hydrogel actuator. The hydrogel actuator can achieve twisting and pulling actions through near-infrared light irradiation control, so that a process that the actuator can stride barriers to convey articles under non-contact type control is achieved.

Description

technical field [0001] The invention relates to the field of intelligent actuator materials of functional nanocomposite materials, in particular to a hybrid hydrogel actuator actuated by near-infrared light, a preparation method and an actuation method thereof. Background technique [0002] Because hydrogel contains a large amount of water and has a perfect three-dimensional network structure to give it the characteristics of soft matter, it has the advantages of weak stimulation-strong response, less addition-big effect, mild actuation conditions, etc.; and soft matter actuators are particularly It is the development of hydrogel actuators in the field of smart devices that has received increasing attention. Organic / inorganic hybrid hydrogel is a functional material that contains incompatible inorganic and organic components and can form a complex structure of nanometer size, which has significantly improved the hydrogel's mechanical strength, responsiveness and other functi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/56C08K3/04C08K3/34C08J3/075
CPCC08F120/56C08J3/075C08J2333/26C08K3/04C08K3/346
Inventor 王涛杨述瑞廖杰新张袁铖肖晓琳孙尉翔童真
Owner SOUTH CHINA UNIV OF TECH
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