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Mxene/PNIPAM/alginate composite thermal response hydrogel as well as preparation and application thereof

An alginate and hydrogel technology, applied in functional hydrogel materials and their preparation and application fields, can solve the problems of poor mechanical properties of PNIPAM hydrogels, and achieve excellent thermal response performance, strong bio-friendliness, high The effect of infrared absorption capacity

Inactive Publication Date: 2019-01-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kind of MXene / PNIPAM / alginate composite thermoresponsive hydrogel and its preparation method and application, to overcome the defects of poor mechanical properties of PNIPAM hydrogel in the prior art

Method used

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  • Mxene/PNIPAM/alginate composite thermal response hydrogel as well as preparation and application thereof
  • Mxene/PNIPAM/alginate composite thermal response hydrogel as well as preparation and application thereof
  • Mxene/PNIPAM/alginate composite thermal response hydrogel as well as preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Using deionized water as a solvent, add components in the following proportions: the NIPAM monomer mass is 20% of the deionized water quality, the MXene quality is 1% of the NIPAM quality, and the sodium alginate quality is 1% of the NIPAM quality, The quality of the crosslinking agent (N, N-methylenebisacrylamide) is 0.1% of the quality of NIPAM, the quality of the initiator (ammonium persulfate) is 1% of the quality of NIPAM, and the quality of the accelerator (tetramethylethylenediamine) is 1% of NIPAM mass to obtain a composite solution.

[0033] (2) Pour the composite solution in step (1) into a glass mold with a cavity thickness of 0.5 mm for in-situ polymerization and solidification molding at a temperature of 10° C. for 48 hours. The hydrogel was taken out from the mold, put into a 1% calcium chloride solution for post-treatment for 48 hours at a temperature of 10°C, and then placed in deionized water for 48 hours at a temperature of 10°C. The obtained comp...

Embodiment 2

[0039] (1) Using deionized water as a solvent, add components in the following proportions: the NIPAM monomer mass is 15% of the deionized water quality, the MXene quality is 3% of the NIPAM quality, and the sodium alginate quality is 1.5% of the NIPAM quality, The quality of the crosslinking agent (N, N-methylenebisacrylamide) is 0.3% of the quality of NIPAM, the quality of the initiator (ammonium persulfate) is 1% of the quality of NIPAM, and the quality of the accelerator (tetramethylethylenediamine) is 1% of NIPAM mass to obtain a composite solution.

[0040] (2) Pour the composite solution in step (1) into a glass mold with a cavity thickness of 1 mm for in-situ polymerization and solidification molding at a temperature of 20° C. for 36 hours. The hydrogel was taken out from the mold, put into a 3% calcium chloride solution for post-treatment for 36 hours at a temperature of 20°C, and then placed in deionized water for 36 hours at a temperature of 20°C. The obtained comp...

Embodiment 3

[0042] (1) Using deionized water as a solvent, add components in the following proportions: the NIPAM monomer mass is 10% of the deionized water quality, the MXene quality is 5% of the NIPAM quality, and the sodium alginate quality is 2% of the NIPAM quality, The quality of the crosslinking agent (N, N-methylenebisacrylamide) is 0.5% of the quality of NIPAM, the quality of the initiator (ammonium persulfate) is 1% of the quality of NIPAM, and the quality of the accelerator (tetramethylethylenediamine) is 1% of NIPAM mass to obtain a composite solution.

[0043] (2) Pour the composite solution in step (1) into a glass mold with a cavity thickness of 2 mm for in-situ polymerization and solidification molding at a temperature of 30° C. for 24 hours. The hydrogel was taken out from the mold, put into a 5% calcium chloride solution for post-treatment for 24 hours at a temperature of 30°C, and then placed in deionized water for 48 hours at a temperature of 30°C. The obtained compos...

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Abstract

The invention relates to Mxene / PNIPAM / alginate composite thermal response hydrogel as well as preparation and application thereof. The hydrogel has a three-network structure, namely an MXene network,a poly(N-isopropylacrylamide) PNIPAM network and an alginate network, and physical crosslinking and chemical crosslinking are formed among the three networks. The preparation method comprises: preparing an MXene / NIPAM / alginate composite solution, carrying out in-situ polymerization, and sequentially putting the composite solution into a calcium chloride solution and deionized water for post-treatment. The preparation method is simple and feasible, and has an important value for preparing flexible actuators. The composite hydrogel has excellent thermal response performance and good mechanical properties, can respond to thermal stimuli by such as infrared light, and can perform telescopic actuation under a certain load.

Description

technical field [0001] The invention belongs to the field of functional hydrogel materials and their preparation and application, in particular to a Mxene / PNIPAM / alginate composite heat-responsive hydrogel and its preparation and application. Background technique [0002] Hydrogel is a polymer network system that can absorb a large amount of water, is soft in nature and can maintain a certain shape. Functional hydrogels can produce corresponding deformation or changes in other physical / chemical properties under stimuli such as temperature, light, ions, and humidity. Deformable functional hydrogels are ideal materials for the preparation of flexible actuators, and they have broad application prospects in various fields, such as soft robots, artificial muscles, cell scaffolds, drug release, and microfluidic control. [0003] Poly(N-isopropylacrylamide) (PNIPAM) is a polymer material with thermoresponsive properties. Its lowest co-solution temperature (LCST) is about 32 °C, wh...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08L33/24C08L5/04C08F220/54C08F222/38
CPCC08F220/54C08J3/075C08J3/243C08J2333/24C08J2405/04C08F222/385
Inventor 王宏志孟俊行李耀刚张青红侯成义
Owner DONGHUA UNIV
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