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Preparation method of fibroin eutectic gel as well as product and application of fibroin eutectic gel

A technology of silk protein and crystalline gel, which is applied in fluid pressure measurement, instruments, electrochemical generators, etc. using capacitance changes, to achieve the effects of improving cycle stability, excellent low temperature resistance, and dendrite problems

Active Publication Date: 2022-07-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the prior art, the present invention discloses a preparation method of silk protein eutectic gel, the raw materials used are all green and cheap The material has good environmental stability and friendliness; the prepared silk protein eutectic glue can be used as a solid electrolyte in the preparation of electrochemical energy storage devices. Compared with the existing liquid electrolyte, it has no leakage and can be used in Stable in the air, stable vapor pressure and not easy to lose water; compared with aqueous electrolytes, the self-corrosion, hydrogen evolution, and dendrite problems of Zn negative electrodes are significantly improved, which can improve the cycle stability and environmental adaptability of zinc metal negative electrodes

Method used

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  • Preparation method of fibroin eutectic gel as well as product and application of fibroin eutectic gel
  • Preparation method of fibroin eutectic gel as well as product and application of fibroin eutectic gel
  • Preparation method of fibroin eutectic gel as well as product and application of fibroin eutectic gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Put natural silkworm cocoons in 0.02mol / L Na 2 CO 3 Boil in aqueous solution for 30min to remove sericin, and wash with deionized water three times to remove residual Na on silk surface 2 CO 3 .

[0060] (2) Dissolving the degummed silk fibroin in a 55 wt% LiBr aqueous solution to form a homogeneous aqueous solution.

[0061] (3) The treated aqueous solution was dialyzed in a dialysis bag with a molecular weight of 6000-8000, and deionized water was changed every 6 hours, and the water was changed 6 times to fully remove LiBr impurities. Concentrating with an aqueous solution of polyethylene glycol with a molecular weight of 2000 increases the concentration of the protein aqueous solution.

[0062] (4) The concentrated aqueous solution was freeze-dried to obtain 2 g of protein powder, which was dissolved in 16 g of hexafluoroisopropanol to form a protein slurry.

[0063] (5) Remove water by placing ethylene glycol, choline chloride, urea, and zinc chloride in a...

Embodiment 2

[0090] The preparation process is basically the same as that in Example 1, except that in step (4), the added 2 g of protein powder is dissolved into a protein slurry with 8 g of hexafluoroisopropanol.

[0091] After testing, the conductivity of the fibroin co-crystal gel prepared in this implementation is 8.26mS.cm -1, the content of DES components in the fibroin co-crystal gel is 74wt%.

Embodiment 3

[0093] (1) to (3) The preparation of protein powder was exactly the same as in Example 1.

[0094] (4) 2 g of protein powder was dissolved in 16 g of hexafluoroisopropanol solution to form a protein slurry.

[0095] (5) Remove water by placing ethylene glycol, choline chloride, urea, and zinc chloride in a drying oven at 60° C. for 6 hours. The four substances were stirred in an oil bath at a molar ratio of 6:3:10:3 at 60 °C for 6 h to form a transparent and colorless DES.

[0096] (6) Scraping the slurry on the release paper with a 100 μm scraper, and immersing it in DES to solidify into a film to obtain a co-crystal gel of silk fibroin.

[0097] Performance Testing:

[0098] The fibroin eutectic gel prepared in this practice is used as the electrolyte diaphragm of the Zn battery, and the metal zinc sheet polished with 2000 meshes is the battery negative electrode, and cobalt ferricyanide, PVDF, conductive carbon are 8:1 in mass ratio: 1 Coating on carbon cloth to prepare ...

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Abstract

The invention discloses a preparation method of silk protein eutectic gel as well as a product and application thereof, the preparation method comprises the following steps: (1) removing impurities from natural silkworm cocoons to obtain silk fibroin, dissolving the silk fibroin in a LiBr aqueous solution to form a uniform aqueous solution, and dialyzing, concentrating and drying to obtain silk protein powder; (2) mixing the silk protein powder prepared in the step (1) with hexafluoroisopropanol to obtain slurry; and (3) scraping the slurry on release paper or pouring the slurry into a mold, and soaking the release paper in a eutectic solvent to solidify into a film, so as to obtain the fibroin eutectic gel. The raw materials adopted by the preparation process disclosed by the invention are green, environment-friendly and low-price materials, and have good environmental stability and friendliness; the prepared fibroin eutectic gel can be used as a solid electrolyte to be applied to preparation of an electrochemical energy storage device, or can be directly used as a mechanical sensor.

Description

technical field [0001] The present invention relates to the technical field of eutectic gel, in particular to a preparation method of fibroin eutectic gel, its product and its application as a solid electrolyte in the preparation of electrochemical energy storage devices and the preparation of mechanical sensors. Background technique [0002] With the increasing depletion of traditional fossil fuel energy and its serious environmental degradation, the need for developing renewable energy is becoming more and more urgent. However, because most renewable energy sources such as wind energy, solar energy, tidal energy and geothermal energy are greatly affected by factors such as time and climate, they are highly intermittent and unstable. Great impact on the grid. The development of recyclable electrochemical energy storage systems with excellent performance has become a key issue at present. [0003] With the increasing demand for electrochemical energy storage devices, peopl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J3/09C08L89/00H01G11/56H01M10/054H01M10/0565G01L1/14G01L9/12
CPCC08J5/18C08J3/093H01M10/0565H01M10/054H01G11/56G01L1/142G01L9/12C08J2389/00
Inventor 谷长栋李中旭王秀丽涂江平
Owner ZHEJIANG UNIV
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