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A kind of preparation method of liquid metal/chitosan derivative hydrogel film

A technology of chitosan derivatives and liquid metals, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement devices, etc., can solve the problems of low conductivity, poor biocompatibility, and high mechanical mismatch of hydrogels, and achieve The effect of low cost and simple preparation process

Active Publication Date: 2022-03-15
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the selection of conductive fillers is very important. The main conductive fillers are conductive polymers, ionic liquids and conductive nanomaterials, but the defects of these conductive fillers may be poor biocompatibility, low conductivity or mechanical properties with hydrogels. high mismatch

Method used

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  • A kind of preparation method of liquid metal/chitosan derivative hydrogel film
  • A kind of preparation method of liquid metal/chitosan derivative hydrogel film
  • A kind of preparation method of liquid metal/chitosan derivative hydrogel film

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preparation example Construction

[0029] The invention provides a kind of preparation method of liquid metal / chitosan derivative hydrogel film, comprises the steps:

[0030] (1) Preparation of cross-linked chitosan quaternary ammonium salt mixture

[0031] Drop the sodium hydroxide solution into the chitosan quaternary ammonium salt solution and keep stirring until the pH value reaches 10. When heated to 70°C, add the crosslinking agent epichlorohydrin to react, and continuously add the sodium hydroxide solution dropwise during the reaction Keeping the pH of the reaction system at 10, reacting at a constant temperature for 4 hours, cooling to room temperature naturally, adjusting the pH value to 7 with hydrochloric acid solution, adding glycerol to obtain a cross-linked chitosan quaternary ammonium salt mixture;

[0032] (2) Preparation of liquid metal / chitosan derivative hydrogel film

[0033] Add liquid metal and cross-linked chitosan quaternary ammonium salt mixed solution to sodium alginate aqueous soluti...

Embodiment 1

[0046] The chemical materials used in the present invention are: chitosan quaternary ammonium salt, epichlorohydrin, sodium hydroxide, hydrochloric acid, glycerin, sodium alginate, liquid metal, deionized water, and the quality purity and precision are controlled. The combined dosage is as follows: in grams, milliliters, millimeters, centimeters 3 is the unit of measurement.

[0047] Chitosan quaternary ammonium salt: HACC solid solid 99.5% 2.0g±0.001g

[0048] Epichlorohydrin: C 3 h 5 ClO liquid liquid 99.5% 4mL±0.001mL

[0049] Sodium hydroxide: NaOH solid solid 99.5% 5g±0.001g

[0050] Hydrochloric acid: HCl liquid liquid 99.5% 23mL±0.001mL

[0051] Glycerol: C 3 h 8 o 3 Liquid liquid 99.5% 1mL±0.001mL

[0052] Sodium alginate: Alginate solid solid 99.5% 0.045g±0.001g

[0053] Liquid metal: gallium indium alloy at 16°C liquid liquid 99.8% 0.3g±0.001g

[0054] Deionized water: H 2 O liquid liquid 99.99% 5000mL±50mL

[0055] The preparation method of liquid meta...

Embodiment 2

[0086] The preparation method of liquid metal / chitosan derivative hydrogel film comprises the steps:

[0087] (1) Preparation of cross-linked chitosan quaternary ammonium salt mixture

[0088]Weigh 2.0g ± 0.001g of chitosan quaternary ammonium salt, measure 200mL ± 0.001mL of deionized water, add it to a beaker, stir for 5min, and let it stand for 24h to obtain an aqueous solution of chitosan quaternary ammonium salt; weigh 5g of sodium hydroxide ±0.001g, measure 100mL±0.001mL of deionized water, add it to a beaker, stir for 5min, and form a 5% (w / v) sodium hydroxide solution; measure 76mL±0.001mL of deionized water and pour it into another beaker Then, measure 23mL±0.001mL 38% hydrochloric acid solution and slowly pour it into the deionized water in the beaker, stir for 5min, and dilute it into a 10% (w / v) hydrochloric acid solution; measure 4mL±0.001 sodium hydroxide solution mL slowly drop into the chitosan quaternary ammonium salt solution and keep stirring until the pH v...

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Abstract

The invention relates to the field of preparation of conductive hydrogel, in particular to a preparation method of a liquid metal / chitosan derivative hydrogel film. In the present invention, liquid metal is used as conductive filler, and sodium alginate and cross-linked chitosan quaternary ammonium salt with good biocompatibility as a flexible network skeleton are used for synergistic response to construct conductive polymer hydrogel. Gel forming yielded liquid metal / chitosan derivative hydrogel films. Wherein adopt epichlorohydrin chemical cross-linking, glycerol physical cross-linking, promptly adopt the method for the organic combination of physicochemical cross-linking technology to obtain the cross-linked chitosan quaternary ammonium salt as the flexible network skeleton of hydrogel. The preparation process of the present invention is simple and low in cost, and the prepared hydrogel film also has self-healing and strain-sensing properties, and is also an antibacterial, self-adhesive, stretchable, highly sensitive strain-sensing conductive hydrogel construction Provided new ideas.

Description

technical field [0001] The invention relates to the field of preparation of conductive hydrogel, in particular to a method for preparing a liquid metal / chitosan derivative hydrogel film. The hydrogel film has self-healing and strain sensing properties. Background technique [0002] Hydrogel is a kind of polymer material with hydrophilic three-dimensional network cross-linked structure. Hydrogel exists in nature itself. At this stage, people can also synthesize hydrogel by chemical methods. Hydrogel has become a research hotspot in many fields because of its excellent water absorption, good mechanical strength and self-healing property. Cross-linked chitosan quaternary ammonium salt is just such a new type of polymer material. It is prepared by cross-linking chitosan. It is generally prepared by chemical cross-linking. Compared with general synthetic materials, it has low toxicity and is easy to degrade. It is known as a low-cost environment-friendly material and has broad a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J3/075C08J3/24C08L5/08C08L5/04C08K3/08C08K5/1515C08K5/053G01B7/16
CPCC08J5/18C08J3/075C08J3/246G01B7/18C08J2305/08C08J2405/04C08K3/08C08K5/1515C08K5/053C08K2201/001
Inventor 李洁王晨方兆舟乔杰韩晶李迎春王文生
Owner ZHONGBEI UNIV