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Double-network autonomous deformation gel and preparation method thereof

A dual-network and gel technology, applied in the field of stimuli-responsive deformation materials, can solve the problems of unsustainable response deformation behavior and uncontrollable material dynamic deformation mode, and achieve the effect of excellent autonomous deformation performance and wide application value.

Inactive Publication Date: 2019-08-02
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing stimulus-response deformable materials are generally based on “on-off” stimuli, and the response deformation behavior of the material is unsustainable; the stimulus source and the response material are separated, and there is no mutual influence relationship, resulting in an uncontrollable dynamic deformation mode of the material.

Method used

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  • Double-network autonomous deformation gel and preparation method thereof
  • Double-network autonomous deformation gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 7.8g (29.8mmol) RuCl to a 500mL round bottom flask 3 ·3H 2 O, 9.36g (60.0mmol) 2,2'-bipyridine, 8.4g (2mmol) LiCl and 50mL dimethylformamide, heat to reflux for 9 hours, add 250mL acetone after cooling, keep at 0°C overnight, filter to get purple Filtrate and dark green solid, deionized water rinse solid three times, until the filtrate is light green, then rinse three times with 10mL ether, vacuum drying, to obtain solid product ruthenium dichlorobipyridyl;

[0037] Mix 24.0mL of 2.35mol / L n-butyllithium (LDA), 8.0mL of diisopropylamine and 30mL of tetrahydrofuran in a 500mL three-necked flask, stir for 15min, and dissolve 10g of 4,4'-dimethyl-2,2 250mL tetrahydrofuran of '-bipyridine was slowly added into the solution through a separatory funnel, and the solution turned orange. After reacting for 2 hours, add 1.7g of paraformaldehyde to the solution, and react until the color of the solution turns green. After continuing to stir for 1 hour, the reaction is stoppe...

Embodiment 2

[0049] The difference between this example and Example 1 is that in this example, the vinyl metal complex used is vinylferrocene dihexafluorophosphate, and the acrylamide monomer used is N-tert-butylpropylene Amide, the photoinitiator used is 2-hydroxyl-2-methyl-1-phenylacetone, the water-soluble initiator used is dibenzoyl peroxide, when preparing polymer network gel products, N-tert-butyl The consumption of base acrylamide is 1.17g, all the other reaction conditions and the consumption of each reactant are all identical with embodiment 1.

[0050] The autonomous deformation delay time of the pattern of this embodiment is: 250 seconds, the deformation cycle: 543 seconds, and the bending deformation range: 65%.

Embodiment 3

[0052] The difference between this example and Example 1 is that in this example, the vinyl metal complex used is dihexafluorophosphate 4'-(4-propenyloxyphenyl)-2,2':6' ,2″-terpyridine-4′-(4-methylphenyl)-2,2′:6′,2″-terpyridine ruthenium, the photoinitiator used is 2-hydroxy-2-methyl-1 -[4-(2-hydroxyethoxy) phenyl]-1-acetone, the consumption of N-isopropylacrylamide is 2.3g when the polymer network gel product, all the other reaction conditions and each reactant Consumption is all identical with embodiment 1.

[0053] The autonomous deformation delay time of the style of this embodiment is: 447 seconds, the deformation cycle: 1130 seconds, and the bending deformation amplitude is 92%.

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Abstract

The invention discloses double-network autonomous deformation gel and a preparation method thereof. The preparation method comprises following steps: acrylamide monomers, acrylic monomers, a cross-linking agent and a water-soluble initiator are subjected to a radical copolymerization reaction in an emulsion, then the mixture is mixed with glycidyl methacrylate, and microgel containing vinyl on thesurface is obtained; the acrylamide monomers, the microgel containing vinyl on the surface and the water-soluble initiator are mixed to be injected into a die, freeze drying is performed after the radical copolymerization reaction ends, and a polymer network gel product is obtained; the microgel containing vinyl on the surface is mixed with the acrylamide monomers, vinyl metal complex monomers and a methanol solution of a photoinitiator, one end of the polymer network gel product is soaked in the mixed solution, left to stand and subjected to a polymerization reaction under ultraviolet light,a solvent is exchanged, and the autonomous deformation gel is prepared. By means of adjustment for monomer types and the like, a dynamic deformation mode is changed, and demands of different usage scenarios are met.

Description

technical field [0001] The invention belongs to the technical field of stimuli-responsive deformable materials, and in particular relates to a dual-network self-deformable gel with controllable dynamic modes and a preparation method thereof. Background technique [0002] As a new type of intelligent polymer material, stimuli-responsive deformable materials can change their own geometric shape in response to external stimuli (such as temperature, pH value, light, etc.). In recent years, stimuli-responsive deformable materials (SRPs) have become a new hotspot in the research, development and application of polymer materials because of their diverse stimuli responses, remote control, easy processing and soft texture, especially in brakes. , sensors and micro-robots have a wide range of potential applications. [0003] With the deepening of research on stimuli-responsive deformable materials, how to precisely control the dynamic deformation mode of stimuli-responsive deformable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/00C08F265/10C08F220/54C08F2/48
CPCC08F2/48C08F265/10C08L51/003C08L2205/025C08F220/54
Inventor 李杰李秀琛徐为民郑朝晖丁小斌
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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