CN109705585B - Preparation method of high-dielectric egg white film material and wearable electronic device - Google Patents
Preparation method of high-dielectric egg white film material and wearable electronic device Download PDFInfo
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- CN109705585B CN109705585B CN201910059887.4A CN201910059887A CN109705585B CN 109705585 B CN109705585 B CN 109705585B CN 201910059887 A CN201910059887 A CN 201910059887A CN 109705585 B CN109705585 B CN 109705585B
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Abstract
The invention is suitable for the technical field of materials, and provides a preparation method of a high-dielectric egg white film material and a wearable electronic device. The preparation method of the film comprises the following steps: extracting egg white solution from poultry eggs; weighing triglycerol, 5, 6-dihydroxyindole and NaHCO according to formula3Powder and egg white solution; adding triglycerin into the weighed egg white solution, and stirring for 2.5-3.5 hours at room temperature to obtain a first mixed solution; adding 5, 6-dihydroxyindole and NaHCO into the first mixed solution3Powder is stirred until the color of the solution is changed into black purple, and a second mixed solution is obtained; and uniformly spreading the second mixed solution on a prepared glass plate, keeping the temperature at 95-99 ℃ for 2.5-3.5 hours, drying, taking out, cooling to room temperature, and stripping to obtain the film material. The film material prepared by the preparation method adopts the egg white which is low in cost and biodegradable as the main raw material of the film, and the prepared film material has excellent dielectric property and can be used together with the currently used HfO2Can be compared with the prior art.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a preparation method of a high-dielectric egg white film material and a wearable electronic device.
Background
At present, electronic equipment, including notebook computers, supercomputers, artificial intelligent chips and the like are developed based on silicon-based technology. First, as the number of transistors on a chip increases, the integration level is increased, so that SiO is generated2The physical thickness of materials is continuously reduced and is approaching the physical limit thickness (3 nm). Search for suitable high dielectric constant materials to replace SiO2Extending the lifetime of silicon-based material electronics is the most straightforward and effective method. Secondly, the non-degradability and environmental pollution of electronic products based on transistors prepared from silicon-based materials become difficult problems. For half a century, environmentally friendly functions have evolvedThe preparation technology of materials, reserve new generation functional electronic products is one of the key points of research and development and technical protection of various countries in the world. Finally, wearable, ultra-flexible electronic products do not show their great advantages and potentials in marine, aerospace, military and civilian applications.
Are currently used to replace SiO2The material is used for expanding the integration density of the transistor due to HfO2(hafnium oxide) has a dielectric constant of 13 to 25, and HfO is used2To replace SiO2The problem of leakage current caused by physical limit thickness can be effectively solved. The most representative is the CPU at present, i 3-i 7 series processors use the HfO2The complex of (1).
However, HfO2The material is difficult to meet the requirements of flexible electronic products, and the Hf metal material belongs to a nonrenewable rare metal resource, is expensive in cost, is not degradable, and is poor in environmental protection property.
Disclosure of Invention
The embodiment of the invention provides a thin film material, aiming at solving the problem of the existing HfO2The material is difficult to meet the requirements of flexible electronic products, and the Hf metal material belongs to a nonrenewable rare metal resource, is expensive in cost, is not degradable and is poor in environmental protection.
The embodiment of the invention is realized in such a way that the preparation method of the film material comprises the following steps:
extracting egg white solution from poultry eggs;
weighing triglycerol, 5, 6-dihydroxyindole and NaHCO according to formula3Powder and egg white solution for later use;
adding triglycerin into the weighed egg white solution, and stirring for 2.5-3.5 hours at room temperature to obtain a first mixed solution;
adding 5, 6-dihydroxyindole and NaHCO to the first mixture3Powder is stirred until the color of the solution is changed into black purple, and a second mixed solution is obtained;
and uniformly spreading the second mixed solution on a prepared glass plate, putting the glass plate into a drying device, keeping the temperature of 95-99 ℃ for 2.5-3.5 hours, taking out, cooling to room temperature, and peeling to obtain the film material.
The embodiment of the invention also provides a wearable electronic device which comprises an electronic element prepared from the thin film material prepared by the preparation method of the thin film material.
The preparation method of the film provided by the embodiment of the invention adopts the egg white which is low in price and biodegradable as the main component of the film material, and adopts NaHCO through a series of modification steps3The powder is used as a stripping agent, so that the film-formed film material is easy to be peeled off from a glass plate and the surface of the film material is not damaged; meanwhile, the prepared film material has excellent flexibility, and can be folded at any angle for more than 10 ten thousand times without any change basically; moreover, the film material is buried in the soil, can be completely degraded in about one month under the action of microbial decomposition in the soil, and the degradation product has no influence on the environment, namely the environment-friendly performance is excellent; moreover, the dielectric constant of the pure egg white film at 1MHZ is 5-7, and the dielectric constant of the film material at 1MHZ is 15-25, namely the dielectric constant is improved by 3-5 times, and the pure egg white film can be matched with the currently used HfO2Compared with the prior art, the film material has dielectric properties which are excellent (the dielectric constant is between 13 and 25), so that the film material has great application prospect and economic benefit on future bionics electronic devices and flexible wearable intelligent equipment.
Drawings
FIG. 1 is a schematic view showing a state where a thin film material produced by the production method of the present invention is peeled off from a glass plate;
FIG. 2 is a schematic diagram of a film material provided by the present invention for flexibility testing at room temperature;
fig. 3 is a dielectric constant test graph of a thin film material provided by an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The film material prepared by the preparation method adopts the egg white which is low in cost and biodegradable as the main raw material of the film, and the prepared film material has excellent dielectric property and can be used together with the currently used HfO2Can be compared with the prior art.
The technical solution and the technical effect of the present invention will be further described by specific examples.
Example 1:
weighing the following components according to the following raw material formula for later use: 35 parts of triglycerol, 2 parts of 5, 6-dihydroxyindole and NaHCO31.5 parts of powder and 95 parts of egg white solution.
The preparation method of the film material of the embodiment is as follows:
preparing egg white liquid: eggs of the domestic chicken group within one week of laying are selected, the egg white solution is extracted, and then the eggs are weighed according to the formula for standby. Specifically, a fresh egg is broken to obtain egg white and yolk, the yolk is removed with a sterilized stainless steel strainer, and a transparent egg white solution is left for later use.
Preparation of a first mixed solution: and adding weighed triglycerin (Pg-3) into the weighed egg white solution, and stirring for 2.5 hours at room temperature to obtain a first mixed solution.
Preparing a second mixed solution: adding the weighed 5, 6-dihydroxyindole (5,6-DHI) and NaHCO into the first mixed solution3And (3) stirring the mixture until the color of the solution becomes black purple to obtain a second mixed solution. Adding 5, 6-dihydroxyindoleThe hydroxyl on the molecular chain of the film material can be chemically reacted with the amino on the egg white protein, so that the dielectric property of the film material is improved.
Preparing a film material: and uniformly spreading the second mixed solution on a prepared glass plate, putting the glass plate into a drying device, keeping the temperature at 99 ℃ for 2.5 hours, taking out, cooling to room temperature, and peeling to obtain the film material. Before mudflat, the edge of the clean glass is pasted with Teflon adhesive tape, and then the second mixed solution is uniformly spread on the edge of the clean glass to obtain a film with the thickness of 100 +/-20 microns. It will be appreciated that egg white flexible substrate films of different thicknesses may be prepared as desired herein. It should be noted that during the mudflat, no bubbles can be generated, which would otherwise affect the properties of the film.
Example 2:
weighing the following components according to the following raw material formula for later use: 40 parts of triglycerol, 1 part of 5, 6-dihydroxyindole and NaHCO31 part of powder and 100 parts of egg white solution.
The preparation method of the film material of this example is substantially the same as that of the above example 1, except that:
preparing egg white liquid: selecting goose eggs which are laid by the domestic goose group within one week, extracting an egg white solution, and weighing according to the formula for later use. Specifically, fresh goose eggs are broken to obtain egg white and yolk, the yolk is removed by using a sterilized stainless steel strainer, and a transparent egg white solution is left for standby.
Preparation of a first mixed solution: and adding the weighed triglycerin into the weighed egg white solution, and stirring for 3.5 hours at room temperature to obtain a first mixed solution.
Preparing a second mixed solution: adding weighed 5, 6-dihydroxyindole and NaHCO into the first mixed solution3And (3) stirring the mixture until the color of the solution becomes black purple to obtain a second mixed solution.
Preparing a film material: and uniformly spreading the second mixed solution on a prepared glass plate, putting the glass plate into a drying device, keeping the temperature at 95 ℃ for 3 hours, taking out, cooling to room temperature, and peeling to obtain the film material.
Example 3:
weighing the following components according to the following raw material formula for later use: 30 parts of triglycerol, 1 part of 5, 6-dihydroxyindole and NaHCO31 part of powder and 100 parts of egg white solution.
The preparation method of the film material of this example is substantially the same as that of the above example 1, except that:
preparation of a first mixed solution: and adding the weighed triglycerin into the weighed egg white solution, and stirring for 3 hours at room temperature to obtain a first mixed solution.
Preparing a film material: and uniformly spreading the second mixed solution on a prepared glass plate, putting the glass plate into a drying device, keeping the temperature at 97 ℃ for 3 hours, taking out, cooling to room temperature, and peeling to obtain the film material.
Example 4:
weighing the following components according to the following raw material formula for later use: 45 parts of triglycerol, 1.5 parts of 5, 6-dihydroxyindole and NaHCO32 parts of powder and 105 parts of egg white solution.
The preparation method of the film material of this example is substantially the same as that of the above example 1, except that:
preparation of a first mixed solution: and adding the weighed triglycerin into the weighed egg white solution, and stirring for 3 hours at room temperature to obtain a first mixed solution.
Preparing a film material: and uniformly spreading the second mixed solution on a prepared glass plate, putting the glass plate into a drying device, keeping the temperature at 98 ℃ for 3.5 hours, taking out, cooling to room temperature, and peeling to obtain the film material.
As shown in FIG. 1, the film materials prepared in the embodiments 1 to 4 of the present invention are all in a translucent film state.
Comparative example 1: this comparative example is essentially the same as example 3, except that egg white solution was prepared from eggs from a domestic chicken flock after 2 weeks of laying.
Comparative examples 2 to 5: they are essentially the same as example 3, except that: in the preparation process of the first mixed solution, the contents of the added triglycerol are 20 parts, 25 parts, 50 parts and 55 parts, respectively.
Comparative example 6: this comparative example is essentially the same as example 3, except that: no NaHCO is added to the first mixed solution3And (3) powder.
Comparative example 7: this comparative example is essentially the same as example 3, except that: in the preparation process of the second mixed solution, NaHCO is added3The powder is replaced by vegetable oil.
Comparative examples 8 to 10: they are essentially the same as example 3, except that: in the preparation process of the second mixed solution, the addition amounts of the 5, 6-dihydroxyindole are 0 part, 3 parts and 5 parts respectively.
Comparative examples 11 to 14: they are essentially the same as example 3, except that: in the preparation process of the first mixed solution, the stirring time is 1, 2, 4 and 5 hours respectively.
Comparative examples 15 to 18: they are essentially the same as example 3, except that: in the process of preparing the film material, the drying time is 1, 2, 4 and 5 hours respectively.
Comparative examples 19 to 21: they are essentially the same as example 3, except that: in the process of preparing the film material, the drying temperature is respectively 80 ℃, 90 ℃ and 105 ℃.
In order to further illustrate the technical effects of the present invention, the following detailed description is made through specific experimental tests.
Experiment one, flexibility test
1. Experimental samples: the film materials of examples 1 to 4 and comparative examples 1 to 21 of the present invention.
2. The experimental method comprises the following steps: as shown in fig. 2, a 50 nm thick metal electrode was vapor-deposited on the film provided in each of the above experimental samples, and a flexibility test, i.e., folding 10 ten thousand times at an arbitrary angle was performed at room temperature to record the experimental sample in which wrinkles or cracks occurred during the recording.
3. The experimental results are as follows: after the film material provided by the embodiments 1 to 4 of the present invention is folded at any angle for 10 ten thousand times, the film is substantially unchanged, which indicates that the film material provided by the present invention has excellent flexibility.
After the film materials provided in the comparative examples 1 to 5 are folded at any angle for 4 to 5 thousands of times, the films are creased or broken to different degrees, which shows that the flexibility of the film material prepared by egg white liquid after one week is better than that of the film material prepared by egg white liquid after 2 weeks; and the amount of the added triglycerin is in a proper range of 30-45 parts by weight, within the content range, the film material with excellent flexibility can be obtained, and the flexibility of the film material beyond the content range is obviously inferior to that of the film material within the content range.
The film materials provided by the comparative examples 6 to 7 begin to have creases or fracture phenomena of different degrees after being folded for 8 to 10 ten thousand times at any angle, which shows that NaHCO is added3As a release agent, may assist in increasing the flexibility of the film material.
Comparative examples 8-10 provide film materials that after being folded 10 million times at any angle, the film had essentially no change, indicating that the amount of 5, 6-dihydroxyindole added had little effect on the flexibility of the film.
The film materials provided in the comparative examples 11 to 14 have different degrees of creases and fractures after being folded at any angle for 8 to 9 ten thousand times, which shows that the stirring time of the first mixed solution has a certain influence on the flexibility of the film, and the flexibility of the film materials obtained after the stirring time is 1 hour, 2 hours, 4 hours and 5 hours is slightly inferior to that obtained after the stirring time is 2.5 to 3.5 hours.
The film materials provided by the comparative examples 15-21 have different degrees of creases and fracture after being folded at any angle for 8-9 ten thousand times, which shows that the control of the drying temperature and time in the process of preparing the film also has certain influence on the flexibility of the finished film product.
Second experiment, biodegradability
The film materials prepared in the embodiments 1 to 4 of the present invention are buried in soil, and the film materials prepared in the embodiments are completely decomposed in about one month under the action of microorganisms in the soil, which indicates that the film materials provided in the embodiments of the present invention have good biodegradability, and the degradation products are harmless to the environment.
Experiment III, dielectric property test
1. Experimental samples: the film material and the pure egg white film provided by the embodiments 1-4 and the comparative examples 1-21 of the invention.
2. The experimental method comprises the following steps: firstly, electrodes are evaporated on the front side and the back side of the prepared egg white film, and then the dielectric property of the egg white film is tested by utilizing a 4294 impedance analyzer under the voltage of 0.5V.
3. The experimental results are as follows: see table 1 below for details.
TABLE 1
From the test results in table 1 above, it can be seen that the dielectric properties of the thin film materials provided in examples 1 to 4 and comparative examples 1 to 21 of the present invention are both greater than the dielectric constant of the pure egg white film, and especially the dielectric constant of the thin film material provided in example 3 is increased by about 5 times compared with the dielectric constant of the pure egg white film.
In addition, from the comparison result of example 3 and comparative example 1, it can be seen that the dielectric property of the film material prepared by using the egg white of the domestic chicken within one week as the main raw material of the film is much better than that after two weeks.
From the comparison results of the example 3 and the comparative examples 2 to 5, it can be found that the content of the triglycerol has a certain influence on the dielectric property of the film material, and the dielectric property is the best when the addition amount is 1 part by weight.
From the comparison of example 3 with comparative example 6, it can be seen that NaHCO was not added3Powder ratio NaHCO3The dielectric properties of the thin film material prepared from the powder are slightly poor. Furthermore, during the process of peeling off the egg white film, it can be found that NaHCO is added3Powder ratio without addition of NaHCO3The powder is more easily peeled off from the glass plate without affecting the egg white filmThe integral integrity of the egg white film improves the stripping efficiency.
As can be seen from the comparison of example 3 with comparative example 7, NaHCO was added3The powder has relatively better dielectric property than the film material prepared by adding vegetable oil. And, NaHCO is added during the process of peeling off the egg white film3The egg white film of the powder is more easily peeled off from the glass plate than the egg white film added with vegetable oil.
From the comparison results of the example 3 and the comparative examples 8-10, it can be seen that the dielectric property of the egg white film can be remarkably improved by adding the 5, 6-dihydroxyindole, the trend of rising first and then falling is generated along with the gradual increase of the adding amount of the 5, 6-dihydroxyindole, and when the adding amount is 1 part, the dielectric constant of the obtained egg white film is the largest.
From the comparison results of example 3 and comparative examples 11 to 14, it can be seen that when the stirring time is 3 hours during the preparation of the first mixed solution, the obtained egg white film has the largest dielectric constant, i.e., the best dielectric property.
From the comparison results of the embodiment 3 and the comparative examples 15-21, the drying time and the drying temperature are respectively 3 hours, and the obtained egg white film has the best dielectric property at 97 ℃.
In addition, as can be seen from the dielectric constant test curves of the film materials provided in the embodiments 1 to 4 of the invention shown in fig. 3, the modified egg white film has good dielectric properties, and the dielectric constant of the modified egg white film is more than 15.
Embodiments of the present invention provide a wearable electronic device comprising an electronic component made from the material of the present invention. Wherein the wearable electronic device comprises a smart surgical glove, a garment, a watch, and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A preparation method of a high-dielectric egg white film material is characterized by comprising the following steps:
extracting egg white solution from poultry eggs;
weighing triglycerol, 5, 6-dihydroxyindole and NaHCO according to formula3Powder and egg white solution for later use;
adding triglycerin into the weighed egg white solution, and stirring for 2.5-3.5 hours at room temperature to obtain a first mixed solution;
adding 5, 6-dihydroxyindole and NaHCO to the first mixture3Powder is stirred until the color of the solution is changed into black purple, and a second mixed solution is obtained;
uniformly spreading the second mixed solution on a prepared glass plate, putting the glass plate into a drying device, keeping the temperature of 95-99 ℃ for 2.5-3.5 hours, taking out, cooling to room temperature, and peeling to obtain the film material;
the poultry egg is one of a duck egg, a goose egg, a quail egg or an egg, and the poultry egg is laid by the poultry within one week;
the formula of the film material comprises the following components in parts by weight:
30-45 parts of triglycerol, 1-2 parts of 5, 6-dihydroxyindole and NaHCO31-2 parts of powder and 95-105 parts of egg white solution.
2. The method for preparing a film material according to claim 1, wherein the step of adding triglycerin to the weighed egg white solution and stirring the mixture at room temperature for 2.5 to 3.5 hours to obtain a first mixed solution specifically comprises:
and adding triglycerin into the weighed egg white solution, and stirring for 3 hours at room temperature to obtain a first mixed solution.
3. The method for preparing a thin film material according to claim 1, wherein the step of uniformly spreading the second mixed solution on a glass plate prepared in advance, placing the glass plate in a drying device, keeping the temperature at 95-99 ℃ for 2.5-3.5 hours, taking out, cooling to room temperature, and peeling off to obtain the thin film material specifically comprises:
and uniformly spreading the second mixed solution on a prepared glass plate, putting the glass plate into a drying device, keeping the temperature at 97 ℃ for 3 hours, taking out, cooling to room temperature, and peeling to obtain the film material.
4. The method for preparing the film material according to claim 1, wherein the formula of the film material comprises the following components in parts by weight:
30 parts of triglycerol, 1 part of 5, 6-dihydroxyindole and NaHCO31 part of powder and 100 parts of egg white solution.
5. A wearable electronic device, comprising an electronic component made of a thin-film material obtained by the method for producing a thin-film material according to any one of claims 1 to 4.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007043973A1 (en) * | 2005-10-13 | 2007-04-19 | Dso National Laboratories | Method of enhancing a fluorescent signal |
| CN102719104A (en) * | 2012-06-28 | 2012-10-10 | 西南大学 | Biodegradable composite film and preparation method thereof |
| CN105440701A (en) * | 2016-01-21 | 2016-03-30 | 江南大学 | Preparation method of edible egg white protein nanometer film |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2007043973A1 (en) * | 2005-10-13 | 2007-04-19 | Dso National Laboratories | Method of enhancing a fluorescent signal |
| CN102719104A (en) * | 2012-06-28 | 2012-10-10 | 西南大学 | Biodegradable composite film and preparation method thereof |
| CN105440701A (en) * | 2016-01-21 | 2016-03-30 | 江南大学 | Preparation method of edible egg white protein nanometer film |
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