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Preparation method of deformation controllable hydrogel actuator

An actuator and hydrogel technology, which is applied in non-active ingredient medical preparations, pharmaceutical formulations, pharmaceutical sciences, etc., can solve the problems of complex preparation methods, poor controllability, and single hydrogel deformation mode, and achieves The preparation process is simple and feasible, and the effect of excellent structural stability

Inactive Publication Date: 2017-07-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preparation methods are relatively complicated, and the deformation mode of the prepared hydrogel is single and the controllability is poor.

Method used

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  • Preparation method of deformation controllable hydrogel actuator
  • Preparation method of deformation controllable hydrogel actuator

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Example 1: Hydrogel Actuator with Unpatterned Surface Specified Global Bending Deformation

[0029] (1) Disperse the lithium magnesium silicate clay in water by magnetic stirring to form a uniform dispersion.

[0030] (2) Add isopropylacrylamide monomer successively in the dispersion liquid of step (1), stir and dissolve, then add potassium persulfate initiator, stir and dissolve, then add tetramethylethylenediamine catalyst under ice bath, Stir and dissolve to obtain a pregel containing lithium magnesium silicate clay, isopropylacrylamide, potassium persulfate, tetramethylethylenediamine, wherein the concentration of lithium magnesium silicate clay is 4%, and the content of isopropylacrylamide The concentration is 4%, the mass of potassium persulfate is 1% of the mass of isopropylacrylamide, and the mass of tetramethylethylenediamine is 1% of that of isopropylacrylamide.

[0031] (3) Pour the pregel processed in step (2) into a rectangular mold with a thickness of 1 m...

example 2

[0034] Example 2: A stripe pattern at a 0° angle to the long side of the hydrogel actuator specifies a hydrogel actuator that bends and deforms along the short side

[0035] (1) Disperse the montmorillonite in water by mechanical stirring to form a uniform dispersion.

[0036] (2) Add isopropylacrylamide monomer successively in the dispersion liquid of step (1), stir and dissolve, then add potassium persulfate initiator, stir and dissolve, then add tetramethylethylenediamine catalyst under ice bath, Stir and dissolve to obtain a uniform pregel containing montmorillonite, isopropylacrylamide, potassium persulfate, and tetramethylethylenediamine, wherein the concentration of montmorillonite is 8%, and the concentration of isopropylacrylamide is 10%. %, the quality of ammonium persulfate is 4% of the quality of isopropylacrylamide, and the quality of tetramethylethylenediamine is 3% of the quality of isopropylacrylamide.

[0037] (3) Pour the pre-gel of step (2) into a 0.5 mm th...

example 3

[0040] Example 3: A stripe pattern at a 45° angle to the long side of the hydrogel actuator specifies a right-handed helical deformation of the hydrogel actuator

[0041] (1) Disperse the layered double hydroxide in water by mechanical stirring to form a uniform dispersion.

[0042] (2) Add isopropylacrylamide monomer successively in the dispersion liquid of step (1), stir and dissolve, then add potassium persulfate initiator, stir and dissolve, then add tetramethylethylenediamine catalyst under ice bath, Stir and dissolve to obtain a uniform pregel containing layered double hydroxide, isopropylacrylamide, potassium persulfate, tetramethylethylenediamine, wherein the concentration of layered double hydroxide is 3%, isopropyl The concentration of acrylamide is 6%, the mass of potassium persulfate is 2.5% of the mass of isopropylacrylamide, and the mass of tetramethylethylenediamine is 2.5% of that of isopropylacrylamide.

[0043] (3) Pour the pregel of step (2) into a rectangu...

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Abstract

The invention provides a deformation controllable hydrogel actuator and a preparation method thereof. The deformation controllable hydrogel actuator is prepared from an inorganic nano-material, poly(isopropyl acrylamide) and water, wherein the concentration distribution of the inorganic nano-material in a thickness direction is non-uniform, so as to form an asymmetrical heterojunction structure; in a plane direction, the non-uniform asymmetrical structure can be randomly patterned according to requirements, so that various reversible deformation triggered by temperature is realized. The preparation method comprises the following steps: mixing isopropyl acrylamide monomer, an initiator and the inorganic nano-material to form uniform pre-gel; pouring the pre-gel into a rectangular mold; covering one layer of mask plate on the pre-gel; evaporating partial water to induce the concentration of the inorganic nano-material to be not uniformly distributed in the thickness direction of an exposed region; then carrying out in-situ polymerization to fix a patterned non-uniform structure, so as to form the deformation controllable hydrogel actuator. The method is simple and feasible and easy to realize; the deformation controllable hydrogel actuator can be used for soft robots, drug delivery, microfluidic valves and artificial muscle.

Description

technical field [0001] The invention relates to the field of hydrogel science and technology, in particular to the preparation of hydrogel actuators. Background technique [0002] Polymer hydrogel has a three-dimensional polymer network structure, and the polymer molecular chains are cross-linked in the form of covalent bonds or non-covalent bonds, and the polymer network is filled with a large amount of water. Therefore, the polymer hydrogel It has a fixed shape, can absorb water and swell, but will not dissolve in water. Stimuli-responsive hydrogels not only have the above characteristics of hydrogels, but also have unique swelling and deswelling behaviors in response to environmental stimuli. A hydrogel actuator is a smart hydrogel that changes reversibly in shape and size when subjected to changes in external stimuli (such as light, electricity, temperature, pH, magnetic field, ions, humidity, etc.). This unique stimulus responsiveness makes hydrogel actuators have gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F2/44C08K3/34C08K7/00C08K3/26C08K3/22C08K3/04C08J3/075A61K47/32A61L27/52A61L27/16A61L27/08A61L27/02C08L33/24
CPCA61K47/32A61L27/02A61L27/025A61L27/08A61L27/16A61L27/52A61L2430/30C08F2/44C08F220/54C08J3/075C08J2333/24C08K3/04C08K3/22C08K3/26C08K3/346C08K7/00C08K2003/2275C08K2003/265C08K2201/011C08L33/24
Inventor 王建锋朱英王金荣谢丹江雷
Owner BEIHANG UNIV
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