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A light-stimuli-responsive gel material, its preparation and application

A gel material and responsive technology, applied in the field of light-stimulated responsive gel materials, can solve the problems of high cost of raw materials and complicated preparation process.

Active Publication Date: 2020-10-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The focus of the present invention is to discover and develop a hydrogel with photoresponsiveness, but there are few reports on existing technologies and materials with this function, either the preparation process is complicated, or the cost of raw materials is relatively high

Method used

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  • A light-stimuli-responsive gel material, its preparation and application
  • A light-stimuli-responsive gel material, its preparation and application
  • A light-stimuli-responsive gel material, its preparation and application

Examples

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preparation example Construction

[0035] The invention provides a method for preparing a photo-stimuli-responsive gel material, comprising the following steps:

[0036] (1) Under light-shielding conditions and under the protection of an inert gas, the organic solution of polyhydroxyl-modified hexaarylbiimidazole molecules, polyglycol and small molecule polyol are mixed and stirred to obtain a mixed solution;

[0037] (2) Mixing the diisocyanate with the mixed solution described in step (1), a crosslinking reaction occurs under the action of a catalyst, and a light-stimuli-responsive gel material containing an organic solvent is obtained after curing and molding;

[0038] Wherein: the polyhydroxy-modified hexaarylbiimidazole molecules are used as the dynamic cross-linking points in the gel material; the small molecule polyols are used as the fixed cross-linking points in the gel material; The long carbon chain contained in the alcohol is used to make the prepared gel material flexible and tough; Alcohol cross-...

Embodiment 1

[0066] A photo-stimuli-responsive gel material, prepared according to the following method:

[0067] (1) Weigh PEG 1000 (1.1g, 1.072mol) was put into a two-neck round bottom flask, vacuumed and dried at 70°C for one hour, and then cooled to room temperature.

[0068] (2) In a nitrogen atmosphere, use a syringe to inject tetrahydroxy-modified hexaarylbiimidazole (2-Cl-4-diol-HABI) (192 mg) dissolved in anhydrous dimethylformamide (DMF) (1.5 mL) , 0.228mmol) and pre-dried pentaerythritol (5.2mg, 0.038mmol), stirred.

[0069] (3) Inject hexamethylene diisocyanate (HDI) (0.33 g, 0.32 mL) and catalyst dibutyltin dilaurate 8 mg into the above mixed solution, and stir again for 30 min.

[0070] (4) Take the above-mentioned mixed solution that has been stirred evenly, pour it into the pre-prepared mold, and put it in a constant temperature drying oven at 40°C. After reacting for 12 hours, take out the formed gel with a thickness of about 2-4 mm, and then the gel The glue was dried ...

Embodiment 2

[0080] A photo-stimuli-responsive gel material, prepared according to the following method:

[0081] (1) Weigh PEG 1000 (1.169g, 1.140mol) was put into a two-neck round bottom flask, vacuumed and dried at 70°C for one hour, and then cooled to room temperature.

[0082](2) In a nitrogen atmosphere, use a syringe to inject tetrahydroxy-modified hexaarylbiimidazole (2-Cl-4-diol-HABI) (192 mg) dissolved in anhydrous dimethylformamide (DMF) (1.5 mL) , 0.228mmol) and pre-dried pentaerythritol (5.2mg, 0.038mmol), stirred.

[0083] (3) Inject diphenylmethane diisocyanate (MDI) (0.49 g, 0.32 mL) and 10 mg of dibutyltin dilaurate as a catalyst into the above mixed solution, and stir again for 30 min.

[0084] (4) Take the above-mentioned mixed solution that has been stirred evenly, pour it into the pre-prepared mold, and put it in a constant temperature drying oven at 40°C. After reacting for 12 hours, take out the formed hydrogel, and then put the gel into an oven at 80°C. Dry in a ...

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Abstract

The invention belongs to the technical field of mechanochemical conductive materials, and more particularly relates to a photostimulation responsive gel material as well as preparation and applicationthereof. A preparation method comprises the following steps: mixing an organic solution of a polyhydroxy-modified hexaarylbiimidazole molecule, polyglycol and small-molecule polyol under a light-shielding condition and inert gas protection to obtain a mixed solution; and mixing diisocyanate with the mixed solution for a cross-linking reaction under the action of a catalyst to obtain the photostimulation responsive gel material containing an organic solvent after solidification molding. The gel material is sensitive to light stimulation when being placed in a solvent, the degree of deformationcan be regulated by the illumination time, and the longer the irradiation time, the more obvious the deformation. The smart gel material prepared in the invention is of a double crosslinked network structure, and hexaarylbiimidazole is contained in a main chain, which can balance the deformation ability and mechanical properties of the gel. The light-driven gel prepared in the invention has simple reaction process, low cost and wide application range.

Description

technical field [0001] The invention belongs to the technical field of mechanochemical conduction materials, and more specifically relates to a light-stimuli-responsive gel material, its preparation and application. Background technique [0002] Smart gel is a type of gel. Traditional hydrogels have the advantages of good water absorption, water retention and easy degradation. Smart hydrogels also have good slow-release properties, biocompatibility, and external environmental responsiveness, so they have a wide range of applications in the fields of pesticides, agriculture, industry, and food, and are a class of polymer materials with great potential for development. Smart hydrogels have good biocompatibility and are easily degraded when in contact with human blood, body fluids, and tissue fluids. Therefore, it is widely used in biomedicine, human tissue engineering, as a drug carrier, sustained release agent and medical adhesive. [0003] Through reasonable design, light...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/38
CPCC08G18/3206C08G18/3848C08G18/4833C08G18/6677
Inventor 朱明强苏玉煊李冲向诗力
Owner HUAZHONG UNIV OF SCI & TECH
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