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A spontaneously driven dopamine gel driver and its preparation method and driving method

A dopamine gel driver and dopamine gel technology, applied in the field of dopamine gel driver and its preparation, can solve the problems of inability to withstand stretching, compression or repeated deformation, low mechanical strength of dopamine gel, complicated operation mode of the gel driver, etc. problem, achieve the effect of simple preparation method, overcome low mechanical strength and high mechanical strength

Active Publication Date: 2019-04-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each drive cycle of the currently reported shape memory gel actuators requires an external force to first fix the gel into a temporary shape (ACS Appl. Mater. Interfaces 2016, 8, 12384−12392; Macromol. Mater. Eng. 2017, 302, 1600359), and the spontaneous transformation of the gel between the temporary shape and the original shape cannot be achieved, so the operation of the gel driver is more complicated
At the same time, the currently reported dopamine gel has low mechanical strength and cannot withstand large stretching, compression or repeated deformation, which greatly restricts the application of dopamine gel in the field of actuators.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve 1.03 mL at room temperature N , N -Dimethacrylamide and 15.417 μL chemical crosslinker N , N' -Methylenebisacrylamide aqueous solution (concentration: 20 mg / mL) was dissolved in 3 mL deoxygenated deionized water, and then 1 mL of dimethyl The sulfoxide solution was stirred evenly, and nitrogen gas was introduced to remove the oxygen in it. Finally, the reaction solution was added to the mold and sealed. At room temperature, it was polymerized under ultraviolet light with a wavelength of 300nm and a power of 50W for 2 hours to form a gel. The tensile breaking strength of the obtained dopamine gel was 30 kPa; the obtained dopamine gel was 3 Soaked in the solution for 30 s, will contain Fe 3+ The dopamine gel was twisted into a helical shape and fixed in NaOH solution with pH = 12 for 20 s to obtain the dopamine gel actuator. The actuator can be uncoiled by soaking in HCl solution with pH = 1 for 10 s, and then soaked in Recoiling can be achieved in NaOH solu...

Embodiment 2

[0034] Dissolve 2.06 mL at room temperature N , N -Dimethacrylamide and 15.417 μL chemical crosslinker N , N'- Methylenebisacrylamide aqueous solution (concentration: 20 mg / mL) was dissolved in 2 mL deoxygenated deionized water, and then 1 mL methanol solution containing 0.55 g dopamine methacrylamide and 10.1 mg initiator Irgacure-2959 was added, After stirring evenly, nitrogen gas was introduced to remove the oxygen therein. Finally, the reaction liquid was added into the mold and sealed. At room temperature, it was polymerized under ultraviolet light with a wavelength of 380 nm and a power of 30 W for 5 h to form a gel. The tensile breaking strength of the obtained dopamine gel was 110 kPa; the obtained dopamine gel was 3 Soaked in the solution for 10 s, will contain Fe 3+ The dopamine gel was twisted into a helical shape and then fixed in KOH solution with pH = 9.5 for 60 s to obtain the dopamine gel actuator. The actuator can be uncoiled by soaking in HCl solution wit...

Embodiment 3

[0036] Dissolve 3.09 mL at room temperature N , N -Dimethacrylamide and 15.417 μL chemical crosslinker N , N' -Methylenebisacrylamide aqueous solution (20 mg / mL concentration) was dissolved in 1 mL deoxygenated deionized water, and then 1 mL ethanol solution containing 0.55 g dopamine methacrylamide and 25 mg initiator Irgacure-2959 was added, After stirring evenly, nitrogen gas was introduced to remove the oxygen therein. Finally, the reaction solution was added into the mold and sealed, and polymerized under ultraviolet light with a wavelength of 360 nm and a power of 40 W at room temperature for 3 h to form a gel. The tensile breaking strength of the obtained dopamine gel was 160 kPa; the obtained dopamine gel was 2 (SO 4 ) 3 After soaking in the solution for 25 s, the dopamine gel containing iron ions was twisted into a helical shape, and the pH=10 Ca(OH) 2 After being fixed in the solution for 50 s, the dopamine gel actuator was obtained. The actuator can be uncoile...

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Abstract

The invention discloses a self-driving dopamine gel driver, a preparation method and a driving manner thereof. The dopamine gel driver is prepared in the manner of copolymerizing dopamine methacrylamide and acrylamide monomers into a gel, soaking the gel in a Fe3+ solution for treating and then acquiring a fixed temporary shape in an alkaline solution. The dopamine gel driver can realize the driving function of automatically changing the shape of the hydrogel in the solution according to the method of changing the pH value of the solution.

Description

technical field [0001] The invention relates to the field of intelligent materials of functional dopamine polymers, in particular to a spontaneously driven dopamine gel driver and its preparation method and driving mode. Background technique [0002] Gel contains a large amount of solvent and has the characteristics of soft matter due to its perfect three-dimensional network structure, which has the advantages of weak stimulation-strong response, less addition-big effect, mild driving conditions, etc.; and soft matter drives, especially gel drives The development in the field of smart devices is receiving increasing attention. [0003] In the study of gel actuators, shape memory gel actuators can return to the original shape from a temporary shape, which is a widely studied gel actuator. However, each driving cycle of the shape memory gel driver reported so far requires an external force to first fix the gel into a temporary shape (ACS Appl. Mater. Interfaces 2016,8, 12384−...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/54C08F222/38C08F220/60C08F2/48C08K3/16C08L33/24
CPCC08F2/48C08F220/54C08K3/16C08L2201/12C08L33/24C08F222/385C08F220/603
Inventor 王涛廖杰新黄家和张袁铖孙尉翔童真
Owner SOUTH CHINA UNIV OF TECH
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