阅读说明：本技术 一种基于介孔硅的柔性压电式纳米发电机的制备方法 (Preparation method of flexible piezoelectric nano-generator based on mesoporous silicon ) 是由 王婷 叶媛媛 蔡成龙 俞陈辰 李高宇 孙海桐 于 2021-07-08 设计创作，主要内容包括：本发明公开了一种基于介孔硅的柔性压电式纳米发电机的制备方法,柔性压电式纳米发电机首先用聚氧丙烯聚氧乙烯共聚物、水、高浓度盐酸、乙醇制备获得介孔硅,再结合聚二甲基硅氧烷,经加热固化获得柔性压电材料,再组装得到压电式纳米发电机。介孔硅压电式纳米发电机可通过改变介孔硅含量、匀胶机转速和温度等方式来调整其输出性能。由介孔硅压电式纳米发电机具有独特且稳定的输出、弹性可拉伸的机械性能,使其成为性能优良的可适于多场景应用的纳米发电机。(The invention discloses a preparation method of a flexible piezoelectric type nanometer generator based on mesoporous silicon. The mesoporous silicon piezoelectric nano generator can adjust the output performance thereof by changing the content of mesoporous silicon, the rotating speed and the temperature of a spin coater and the like. The mesoporous silicon piezoelectric nano generator has unique and stable output and elastic and stretchable mechanical properties, so that the mesoporous silicon piezoelectric nano generator becomes a nano generator with excellent performance and suitable for multi-scene application.)

1. a preparation method of a flexible piezoelectric nano-generator based on mesoporous silicon is characterized by comprising the following steps:

a. obtaining a mixed solution of mesoporous silicon and polydimethylsiloxane according to the mass ratio of 1: 10-40;

b. uniformly coating the mixed solution obtained in the step a on a glass slide by using a spin coater;

c. putting the glass slide obtained in the step b into an oven;

d. and c, placing the film obtained in the step c on two layers of aluminum foils with the same area and size, and externally connecting a lead to obtain the nano generator.

2. The method for preparing the flexible piezoelectric nano-generator based on the mesoporous silicon as claimed in claim 1, wherein the method comprises the following steps: in the step a, the mass ratio of the mesoporous silicon to the polydimethylsiloxane is 1: 20.

3. The method for preparing the flexible piezoelectric nano-generator based on the mesoporous silicon as claimed in claim 1, wherein the method comprises the following steps: in the step b, the rotating speed of the spin coater is 100-3000 r/min.

4. The method for preparing the flexible piezoelectric nano-generator based on the mesoporous silicon as claimed in claim 1, wherein the method comprises the following steps: in the step b, the rotating speed of the spin coater is 1500 r/min.

5. The method for preparing the flexible piezoelectric nano-generator based on the mesoporous silicon as claimed in claim 1, wherein the method comprises the following steps: in the step c, the temperature of the oven is 30-120 ℃.

6. The method for preparing the flexible piezoelectric nano-generator based on the mesoporous silicon as claimed in claim 1, wherein the method comprises the following steps: in the step c, the temperature of the oven is 90 ℃.

7. The method for preparing the flexible piezoelectric nano-generator based on the mesoporous silicon as claimed in claim 1, wherein the method comprises the following steps: in the step c, the reaction time in the oven is 0.5-1 h.

Technical Field

The invention belongs to the technical field of flexible nano generators, mainly relates to a flexible piezoelectric nano generator based on mesoporous silicon and a manufacturing method thereof, and is particularly suitable for application in the biological field.

Background

With the development of economy and society, the demand for portable and miniaturized electronic devices is more and more urgent, and the demand for energy supply systems is high. Different from the defects of heavy pollution and poor endurance of the traditional power supply, the novel piezoelectric type generator collects mechanical energy and converts the mechanical energy into electric energy, so that self-power supply of electronic equipment is realized. Meanwhile, the flexible piezoelectric type generator can adapt to various scenes due to the characteristics of easy extension and variability, and has wide application prospect.

However, the output voltage of the existing flexible piezoelectric generator is low, so that the application of the existing flexible piezoelectric generator in the biomedical field is limited.

Disclosure of Invention

The purpose of the invention is as follows: the invention provides a preparation method of a flexible piezoelectric nano-generator based on mesoporous silicon.

The technical scheme is as follows: in order to achieve the above object, the present invention provides a method for preparing a flexible piezoelectric nano-generator based on mesoporous silicon, comprising the following steps:

a. obtaining a mixed solution of mesoporous silicon and polydimethylsiloxane according to the mass ratio of 1: 10-40;

b. uniformly coating the mixed solution in the step a on a glass slide by using a spin coater;

c. putting the glass slide in the step b into an oven;

d. and c, placing the film obtained in the step c on two layers of aluminum foils with the same area and size, and externally connecting a lead to obtain the nano generator.

Further, in the step a, the mass ratio of the mesoporous silicon to the polydimethylsiloxane is 1: 20.

Further, in the step b, the rotating speed of the spin coater is 100-3000 r/min.

Further, in the step b, the rotating speed is 1500 r/min.

Further, in the step c, the temperature of the oven is 30-120 ℃.

Further, in the step c, the oven temperature is 90 ℃.

Further, in the step c, the reaction time in the oven is 0.5-1 h.

Has the advantages that: the preparation method is simple, easy to synthesize and capable of being popularized on a large scale. Has flexible structure, can match with the modulus of body tissue, and can not damage the body.

Drawings

FIG. 1 shows the surface morphology of a mesoporous silicon photographed by a scanning electron microscope;

FIG. 2 shows the thickness of the film prepared in example 2;

fig. 3 power generation performance of the friction nanogenerators prepared in example 1, example 2 and example 3, respectively.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. After reading the present disclosure, one skilled in the art can make various changes and modifications to the invention, and such equivalents fall within the scope of the claims of the present application.

A preparation method of a flexible piezoelectric nano-generator based on mesoporous silicon comprises the following steps:

a. obtaining a mixed solution of mesoporous silicon and polydimethylsiloxane according to the mass ratio of 1: 10-40;

b. uniformly coating the mixed solution obtained in the step a on a glass slide by using a spin coater at the rotating speed of 100-3000 r/min;

c. putting the glass slide in the step b into an oven at the temperature of 30-120 ℃, wherein the reaction time is 0.5-1 h;

d. and c, placing the film obtained in the step c on two layers of aluminum foils with the same area and size, and externally connecting a lead to obtain the nano generator.

In the step a, the mass ratio of the mesoporous silicon to the polydimethylsiloxane to obtain the optimal voltage is 1: 20.

In the step b, the rotating speed for obtaining the optimal voltage is 1500 r/min.

In step c, the reaction temperature at which the optimum voltage is obtained is 90 ℃.

Example 1

Mixing the mesoporous silicon and the polydimethylsiloxane according to the mass ratio of 1:10, and uniformly stirring. Uniformly coating the mixed solution on a glass slide by using a spin coater at the rotating speed of 1500r/min, and putting the glass slide into a drying oven at the temperature of 90 ℃ for 1h to obtain a mixed transparent film; cutting the film and the aluminum sheet into uniform areas, placing the transparent film on two layers of aluminum foils with the same areas, externally connecting a lead, and sealing edges by using a polyimide transparent adhesive tape to obtain the nano generator.

Example 2

Mixing the mesoporous silicon and the polydimethylsiloxane according to the mass ratio of 1:20, and uniformly stirring. Uniformly coating the mixed solution on a glass slide by using a spin coater at the rotating speed of 1500r/min, and putting the glass slide into a drying oven at the temperature of 90 ℃ for 1h to obtain a mixed transparent film; cutting the film and the aluminum sheet into uniform areas, placing the transparent film on two layers of aluminum foils with the same areas, externally connecting a lead, and sealing edges by using a polyimide transparent adhesive tape to obtain the nano generator.

Example 3

Mixing the mesoporous silicon and the polydimethylsiloxane according to the mass ratio of 1:40, and uniformly stirring. Uniformly coating the mixed solution on a glass slide by using a spin coater at the rotating speed of 1500r/min, and putting the glass slide into a drying oven at the temperature of 90 ℃ for 1h to obtain a mixed transparent film; cutting the film and the aluminum sheet into uniform areas, placing the transparent film on two layers of aluminum foils with the same areas, externally connecting a lead, and sealing edges by using a polyimide transparent adhesive tape to obtain the nano generator.

In examples 1 to 3, a flexible piezoelectric nano-generator based on mesoporous silicon was prepared with different mass ratios of mesoporous silicon and polydimethylsiloxane to obtain the optimal ratio for preparing materials. The mass ratio of the components is 1: 10. 1: 20. 1:40 of the mesoporous silicon-based flexible piezoelectric nano-generator.

The results of the experiments are summarized below:

example 4

Mixing the mesoporous silicon and the polydimethylsiloxane according to the mass ratio of 1:20, and uniformly stirring. Uniformly coating the mixed solution on a glass slide by using a spin coater at the rotating speed of 90r/min, and putting the glass slide into a drying oven at the temperature of 90 ℃ for reaction for 1h to obtain a mixed transparent film; cutting the film and the aluminum sheet into uniform areas, placing the transparent film on two layers of aluminum foils with the same areas, externally connecting a lead, and sealing edges by using a polyimide transparent adhesive tape to obtain the nano generator.

Example 5

Mixing the mesoporous silicon and the polydimethylsiloxane according to the mass ratio of 1:20, and uniformly stirring. Uniformly coating the mixed solution on a glass slide by using a spin coater at the rotating speed of 3000r/min, and putting the glass slide into a drying oven at the temperature of 90 ℃ for reaction for 1h to obtain a mixed transparent film; cutting the film and the aluminum sheet into uniform areas, placing the transparent film on two layers of aluminum foils with the same areas, externally connecting a lead, and sealing edges by using a polyimide transparent adhesive tape to obtain the nano generator.

In examples 2, 4 and 5, we prepared a flexible piezoelectric nano-generator based on mesoporous silicon at different rotation speeds of the spin coater to obtain the optimal ratio for preparing materials. The flexible piezoelectric nano-generator based on the mesoporous silicon is prepared at different rotating speeds of 90r/min, 1500r/min and 3000 r/min.

The results of the experiments are summarized below:

example 6

Mixing the mesoporous silicon and the polydimethylsiloxane according to the mass ratio of 1:20, and uniformly stirring. Uniformly coating the mixed solution on a glass slide by using a spin coater at the rotating speed of 1500r/min, putting the glass slide into a drying oven at the temperature of 25 ℃, and reacting for 1h to obtain a mixed transparent film; cutting the film and the aluminum sheet into uniform areas, placing the transparent film on two layers of aluminum foils with the same areas, externally connecting a lead, and sealing edges by using a polyimide transparent adhesive tape to obtain the nano generator.

Example 7

Mixing the mesoporous silicon and the polydimethylsiloxane according to the mass ratio of 1:20, and uniformly stirring. Uniformly coating the mixed solution on a glass slide by using a spin coater at the rotating speed of 1500r/min, putting the glass slide into a drying oven at the temperature of 120 ℃, and reacting for 1h to obtain a mixed transparent film; cutting the film and the aluminum sheet into uniform areas, placing the transparent film on two layers of aluminum foils with the same areas, externally connecting a lead, and sealing edges by using a polyimide transparent adhesive tape to obtain the nano generator.

In examples 2, 6, 7, we prepared a flexible piezoelectric nanoelectrical generator based on mesoporous silicon at different reaction temperatures to obtain the optimal ratio for preparing the materials. The flexible piezoelectric nano-generator based on the mesoporous silicon is prepared at different reaction temperatures of 25 ℃, 90 ℃ and 120 ℃.

The results of the experiments are summarized below: