Water-retaining gel material and preparation method thereof

A technology of water-retaining gel and water-retaining layer, which is applied in the direction of chemical instruments and methods, rubber layered products, layered products, etc., can solve the problems of the decline of the conductivity and sensitivity of the ionic skin, and the easy loss of water in the ionic skin, so as to prevent The effect of water loss

Inactive Publication Date: 2019-02-15
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the ionic skin is pressure sensitive, the water of the hydrogel-based ionic skin is easy to lose, which leads to the decrease of the conductivity and sensitivity of the ionic skin

Method used

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  • Water-retaining gel material and preparation method thereof
  • Water-retaining gel material and preparation method thereof
  • Water-retaining gel material and preparation method thereof

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preparation example Construction

[0035] The preparation raw materials of the conductive layer include agar, polyvinyl alcohol, acrylic acid, persulfate, N,N-methylenebisacrylamide, inorganic metal salt and water, the agar, polyvinyl alcohol, acrylic acid, persulfate , N,N-methylenebisacrylamide, the mass ratio of inorganic metal salt and water is (0.3~0.6): (1.0~1.6): (3.0~6.0): (0.01~0.06): (0.01~0.05) : (0.3 to 0.5): (0.75 to 0.80).

[0036] The water-retaining gel material of the present invention comprises a first water-retaining layer and a second water-retaining layer, and the first water-retaining layer and the second water-retaining layer are polysiloxane elastomers. In the present invention, the polysiloxane elastomer is preferably polymethylphenylsiloxane, polyether polysiloxane or polydimethylsiloxane. In the present invention, the thicknesses of the first water retaining layer and the second water retaining layer are independently preferably 1 to 2 mm.

[0037] The water-retaining gel material o...

Embodiment 1

[0071] 1) First, mix 3 mL of polymethylphenylsiloxane and 0.3 mL of vinyltriamine, inject it into a petri dish, and bake it at 60°C to semi-dry to obtain a polymethylphenylsiloxane elastomer layer ;

[0072] 2) The elastomer surface was thoroughly cleaned with methanol and deionized water, and then the elastomer was fully soaked in BP solution (10 wt% ethanol solution) for 2 minutes at room temperature. After that, the elastomer was washed three times with methanol and completely dried with nitrogen to obtain a first water-retaining layer.

[0073] 3) Dissolve 0.3 g of agar and 1.0 g of polyvinyl alcohol in 20 mL of deionized water at 95°C, then add 3 g of acrylic acid to the reaction mixture, pass nitrogen into the mixture for deoxygenation for 10 min, and add 0.01 g of persulfuric acid Ammonium, 0.03g of N,N-methylenebisacrylamide, and 0.30g of iron salt, the resulting solution was injected into a mold equipped with an elastomer, kept at 60°C, and kept at a constant tempera...

Embodiment 2

[0078] 1) First, 3 mL of polyether polysiloxane and 0.3 mL of diaminocyclohexane were mixed, poured into a petri dish, and dried at 60° C. until semi-dry solidification to obtain a polyether polysiloxane elastomer.

[0079] 2) The elastomer surface was thoroughly cleaned with methanol and deionized water, and then the elastomer was fully soaked in BP solution (10 wt% ethanol solution) for 2 minutes at room temperature. After that, the elastomer was washed three times with methanol and completely dried with nitrogen to obtain a first water-retaining layer.

[0080] 3) Dissolve 0.4 g of agar and 1.1 g of polyvinyl alcohol in 21 mL of deionized water at 95°C, then add 3 g of acrylic acid to the reaction mixture, pass nitrogen into the mixture for deoxygenation for 10 min, and add 0.02 g of persulfuric acid Potassium, 0.01 g of N,N-methylenebisacrylamide, and 0.40 g of aluminum salt, the resulting solution was injected into a petri dish containing an elastomer, kept at 65°C, and k...

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Abstract

The invention provides a water-retaining gel material and belongs to the technical field of gel materials. The gel material comprises a first water-retaining layer, a conducting layer and a second water-retaining layer in sequence, wherein the first water-retaining layer and the second water-retaining layer are polysiloxane elastomers; the conducting layer is prepared from agar, polyvinyl alcohol,acrylic acid, persulfate, N,N-methylenebisacrylamide, inorganic metal salt and water. Acrylic acid in the raw materials of the conducting layer of the water-retaining gel material is subjected to a polymerization reaction under the action of a cross-linking agent N,N-methylenebisacrylamide, and agar, polyvinyl alcohol, polyacrylic acid and metal ions are subjected to a coordinated complexation reaction. By the aid of the three-dimensional network structure, free H<+> and metal ions of the conducting layer, the hydrogel material has pressure sensitivity, self-healing property and conductivity,and water of the gel material is prevented from losing by means of the water-retaining layers located on the two sides.

Description

technical field [0001] The invention relates to the technical field of gel materials, in particular to a water-retaining gel material and a preparation method thereof. Background technique [0002] In recent years, hydrogels have attracted much attention in sensors, tissue engineering scaffolds, and drug carriers due to their good flexibility, sensitivity, biocompatibility, and permeability. Because the softness, biocompatibility, and high stretchability of hydrogels are similar to those of human skin, they can be the preferred raw materials for electronic skins. The skin, as an organ of the human body, is soft, tough, immune, self-healing, and able to sense subtle environmental differences, such as small temperature changes, which has stimulated many studies on artificial skin materials, especially electronic skin and soft skin. Sexual wearable sensors. These devices can convert external stimuli (such as pressure, temperature, humidity, or distortion) into detectable elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/20B32B25/04C08L33/02C08L5/12C08L29/04C08J3/075C08F220/06C08F222/38
CPCB32B25/20B32B25/042C08F220/06C08J3/075C08J2333/02C08J2405/12C08J2429/04C08F222/385
Inventor 李秋荣王淑雪冯双将迟宏进
Owner YANSHAN UNIV
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