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Preparation method of high-transparency, high-tensile and high-conductivity ion hydrogel

A high-conductivity, ionic water technology, applied in the field of high-performance hydrogel materials, can solve the problem of low conductivity of ion gels, and achieve the effect of improving ion resistance and high tensile properties

Active Publication Date: 2021-06-22
FOSHAN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the systems use weak electrolytes as the ion system, so the conductivity of this type of ion gel is not high.

Method used

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  • Preparation method of high-transparency, high-tensile and high-conductivity ion hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 3 grams of nano lithium algalite Laponite and dissolve it in 46.85 grams of deionized water, add 35 grams of sodium phytate, stir to form a transparent solution, then add 15 grams of monomer N,N-isopropylacrylamide, 0.05 grams of chemical cross-linking Agent N,N-methylenebisacrylamide, 0.1 g of 2959 photoinitiator, stirred to form a transparent solution, this solution has good stability, and it is still in a transparent solution state after being sealed and protected from light for 30 days. Take the reaction solution in a glass vessel, and perform a photocuring reaction in a UV-LED light curing machine at a wavelength of 35 nm. After ten minutes, take out the glass vessel to obtain ionic hydrogel 1 .

Embodiment 2

[0031] Weigh 1 gram of nano lithium algalite Laponite and dissolve it in 63 grams of deionized water, add 15 grams of potassium phytate, stir to form a transparent solution, then add 20 g of monomer hydroxyethyl methacrylate, 0.5 g of chemical crosslinking agent N -Hydroxymethylacrylamide, 0.5 g of potassium persulfate, stirred to form a transparent solution, this solution has good stability, and it is still in the state of a transparent solution after being sealed and protected from light for 30 days. The reaction solution was placed in a glass vessel, and the free radical reaction was carried out in an oven at 55° C., and the glass vessel was taken out after fifteen minutes to obtain ionic hydrogel 2 .

Embodiment 3

[0033] Weigh 5 grams of nano lithium algalite Laponite and dissolve it in 77 grams of deionized water, add 8 grams of sodium phytate, stir to form a transparent solution, then add 5 grams of monomeric sodium acrylate and 1 grams of chemical cross-linking agent N,N-methylene Diacrylamide and 1g of ammonium persulfate are stirred to form a transparent solution, and then 3g of sodium chloride is added to form a transparent solution. The solution has good stability, and can be stored in a sealed and dark place for 7 days to form a transparent solution. The reaction solution was put into a glass vessel, and the free radical reaction was carried out in an oven at 55° C., and the glass vessel was taken out after fifteen minutes to obtain ionic hydrogel 3 .

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Abstract

The invention discloses a preparation method of high-transparency, high-tensile and high-conductivity ion hydrogel, which is characterized in that phytic acid and salts thereof are used as conductive agents and stable dispersants, and a stable dispersion system of nano laponite is designed by compounding; the preparation method of the stable dispersion system comprises the following steps: firstly dissolving the nano laponite in water, then sequentially adding the stable dispersing agent, the monomer, the cross-linking agent and the initiator to form a transparent solution, and finally carrying out photocuring reaction on the transparent solution to obtain the high-transparency, high-tensile and high-conductivity ionized water gel. Experiments prove that phytic acid and salts thereof are adopted to prepare a nano laponite reaction aqueous solution, and the prepared reaction solution has long-term stability and is in a solution state after being placed at room temperature for more than one month. The ionized water gel prepared by the invention not only has high transparency and high tensile property, but also has the conductivity of 0.2 S / m, which is far better than that in the prior art.

Description

technical field [0001] The invention relates to a high-performance hydrogel material, in particular to a preparation method and application of a high-transparency, high-stretch, and high-conduction ion hydrogel material. Background technique [0002] Flexible sensors based on conductive hydrogels have broad application prospects in wearable devices, implantable devices, soft robots, and human-computer interaction systems. As one of the ideal carriers for human-machine interface, more and more researches apply hydrogels to electronic devices such as bioelectronics. However, there are still some deficiencies in conductive hydrogel materials, which limit its practical application, and the performance of hydrogels still needs to be further improved, such as: 1) Most of the gels themselves have insufficient mechanical properties (modulus, strength, fracture energy, etc.) , it is easy to break when stretched, and cannot meet the requirements of loaded flexible devices; especially...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F222/38C08F220/20C08F220/06C08F220/58C08F220/56C08F2/44C08K7/00C08K3/34C08K5/521
CPCC08F220/54C08F220/20C08F220/06C08F220/585C08F220/56C08F2/44C08K7/00C08K3/34C08K5/521C08F222/385
Inventor 刘群峰龙志军
Owner FOSHAN POLYTECHNIC