CN113364352A - Preparation method of sugarcane-based evaporation-driven power generation material - Google Patents
Preparation method of sugarcane-based evaporation-driven power generation material Download PDFInfo
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- CN113364352A CN113364352A CN202110787479.8A CN202110787479A CN113364352A CN 113364352 A CN113364352 A CN 113364352A CN 202110787479 A CN202110787479 A CN 202110787479A CN 113364352 A CN113364352 A CN 113364352A
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H02N3/00—Generators in which thermal or kinetic energy is converted into electrical energy by ionisation of a fluid and removal of the charge therefrom
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Abstract
A preparation method of a sugarcane-based evaporation-driven power generation material belongs to the technical field of new energy. Soaking the sugarcane sheets to remove sugar in the sugarcane, and obtaining the sugarcane after sugar removal; freeze-drying the sugar-removed sugarcane to obtain dried sugarcane, then carrying out carboxylation modification reaction in a modification solvent consisting of citric acid and triethylamine, cleaning with acetone and deionized water, and freeze-drying to obtain modified sugarcane; and finally, fixing the electrodes on the upper and lower surfaces of the modified sugarcane through waterproof adhesive tapes to obtain the evaporation-driven power generation material. The invention has simple construction, convenient operation and low cost, is suitable for large-scale generation, and the prepared device can convert the energy in the spontaneous evaporation process of the solution into electric energy and can be used for the instant power supply of electronic devices through proper series/parallel connection.
Description
Technical Field
The invention belongs to the technical field of new energy, and particularly relates to a preparation method of a sugarcane-based evaporation-driven power generation material.
Background
With the development of nano science and technology in recent years, researchers have found more and more forms of converting mechanical energy of low-frequency mechanical motion or other low-grade energy sources and the like which are difficult to utilize before into electric energy, such as triboelectricity, electret, piezoelectric, thermoelectric and hydro-electric power generation. Wherein hydroelectric power generation is a clean and potentially powerful way.
Since 2017, the phenomenon of hydroelectric generation has made a major breakthrough, and researchers find that the streaming potential can be used to generate electric energy without additional force. The foreign famous journal Nature Nanotechnology reports that power can be generated by inserting a carbon black sheet subjected to plasma treatment into a beaker filled with deionized water. In such devices, the tightly packed porous carbon nanoparticles form a continuous microchannel, and water permeates into the porous carbon nanotubes under the action of capillary pressure and natural evaporation to cause a flowing potential, and the open-circuit voltage generated by the device can reach about 1V. However, most of these nanogenerators are based on porous materials, such as carbon black, metal oxide, cellulose paper, etc., which are not natural materials, require multiple processes, and are not widely available, complex in structure and high in cost.
Disclosure of Invention
In order to overcome the problems that the existing evaporation-driven nano generator is not wide in source, complex in structure and high in cost, the invention provides a preparation method of an evaporation power generation material based on sugarcane.
The invention comprises the following steps:
1) soaking the sugarcane sheets to remove sugar in the sugarcane, and obtaining the sugarcane after sugar removal;
2) freeze-drying the sugar-removed sugarcane to obtain dried sugarcane;
3) placing the dried sugarcane in a modified solvent consisting of water, citric acid and triethylamine for carboxylation modification reaction, then washing with acetone and deionized water, and freeze-drying to obtain modified sugarcane;
4) and fixing the electrodes on the upper and lower surfaces of the modified sugarcane through waterproof adhesive tapes to obtain the evaporation-driven power generation material.
The invention adopts natural biomass material sugarcane as key substrate material, and the sugarcane is frozen and dried after being washed and soaked to remove sugar in the sugarcane, and then the sugar is passed throughTriethylamine and citric acid are used for carrying out carboxylation modification on the modified sugarcane, the modified sugarcane is soaked in deionized water through coupling electrodes on the upper and lower surfaces of the sugarcane, water molecules automatically absorb water through the pore structure of the sugarcane, spontaneous evaporation driving power generation is realized, and the open-circuit voltage and the short-circuit current density of a single material in an aqueous solution under an optimized condition can reach 0.34V and 10 mA/m2。
The device has the advantages of simple construction, convenient operation, low cost and suitability for large-scale generation, and the prepared device can convert the energy in the spontaneous evaporation process of the solution into electric energy and can be used for instant power supply of electronic devices (such as small bulbs, small fans, mobile phones and the like) through proper series/parallel connection.
Further, the height of the sugarcane sheet in the step 1) is 1.5 cm. When the height of the sugarcane sheet is 1.5cm, the open-circuit voltage of the evaporation-driven power generation material is the largest, and the performance is optimal. When the height of the sugarcane is increased from 1.5cm, the open circuit voltage of the evaporation-driven power generation material shows a tendency to decrease because the moisture hardly reaches the electrode surface on the top of the sugarcane as the height of the internal channel of the sugarcane increases, and it is difficult to constitute a current loop of the power generation device, resulting in poor performance of measurement, and the performance is also worse than 1.5cm when the height of the sugarcane is 1cm because the sugarcane is bent with the expansion of water at 1cm, and is severely deformed, resulting in poor performance, and according to the results of experiments, the performance of the sugarcane is optimal when the height of the sugarcane is 1.5 cm.
The mixing ratio of deionized water, citric acid and triethylamine in the modified solvent in the step 3) is 10mL to 15g to 0.5 mL. The open circuit voltage of the evaporation driving power generation material is the largest under the mixing ratio condition, and the performance is optimal.
In order to fully perform the reaction to obtain a completely modified material, in the step 3), a preservative film and tinfoil are sealed during the carboxylation modification reaction and then are placed in a 120 ℃ oven for treatment for 4 hours.
The electrode in the step 4) is a stainless steel metal mesh or a copper foil. Potential differences generated on the upper surface and the lower surface of the sugarcane are transmitted to a measuring instrument through the stainless steel metal net and the copper foil.
According to the stainless steel 304 with the stainless steel metal mesh number of 400, the diameter of a single metal wire is 0.03mm, the conductivity of the metal mesh is 3 omega/m, the electric energy loss can be effectively reduced, and the electric energy output performance can be improved.
Drawings
FIG. 1 is a graph of open circuit voltage of evaporation driven generator devices prepared according to the present invention at different solution ratios.
FIG. 2 is an SEM photograph of sugar cane before modification.
Fig. 3 is a graph of open circuit voltage at different heights for evaporation driven generator devices made according to the present invention.
Fig. 4 shows the open circuit voltage test results of the evaporation-driven generator devices prepared according to the present invention in series.
Fig. 5 shows the test results of the short-circuit current of the evaporation-driven generator device prepared by the present invention in parallel.
Detailed Description
Firstly, modifying sugarcane:
washing and soaking a sugarcane sheet with the height of 1.5cm with water to remove sugar in the sugarcane sheet, and freeze-drying (the temperature of a cold well is about-50 ℃ and the vacuum pressure is 1 pa) for 24 hours to obtain the dried sugarcane.
22.5g of anhydrous citric acid powder is taken and dispersed in 15 mL of deionized water by stirring, 0.75 mL of triethylamine solution is added and fully stirred for 30 min until the solution is dissolved, and the modified solution is obtained.
And (3) immersing the dried sugarcane into the modification solution, sealing the sugarcane by using a preservative film and tinfoil, and then putting the sugarcane into a 120 ℃ oven for modification reaction for 4 hours.
And after the reaction is finished, taking out the sugarcane, cleaning the sugarcane for 3-4 times by using acetone and deionized water, and then carrying out freeze drying (the temperature of a cold well is about-50 ℃ and the vacuum pressure is 1 pa) for 24 hours to obtain the modified sugarcane.
Secondly, preparing an evaporation driving power generation material:
and (3) fixing stainless steel metal nets (or copper foils) on the upper surface and the lower surface of the modified sugarcane respectively by using transparent adhesive tapes to obtain the evaporation-driven power generation material.
The stainless steel metal net is 304 stainless steel, the mesh number of the metal net is 400, the diameter of a single metal wire is 0.03mm, and the conductivity of the metal net is 3 omega/m.
The evaporation driving power generation material is formed by taking sugarcane which is modified by carboxylation as a power generation unit and taking a stainless steel metal net (or copper foil) as an electrode.
Thirdly, testing the performance of the evaporation driving power generation material and obtaining the result:
1. fig. 1 shows the open circuit voltage test results of the evaporation-driven power generation material.
Sc0 represents the mixing ratio of deionized water, anhydrous citric acid and triethylamine being 0: 0.
Sc1 represents a mixing ratio of deionized water, anhydrous citric acid and triethylamine of 10 mL: 0 g: 0.5 mL.
Sc2 represents a mixing ratio of deionized water, anhydrous citric acid and triethylamine of 10 mL: 15 g: 0 mL.
Sc3 represents a mixing ratio of deionized water, anhydrous citric acid and triethylamine of 10 mL: 15 g: 0.1 mL.
Sc4 represents a mixing ratio of deionized water, anhydrous citric acid and triethylamine of 10 mL: 15 g: 0.25 mL.
Sc5 represents a mixing ratio of deionized water, anhydrous citric acid and triethylamine of 10 mL: 15 g: 0.5 mL.
Sc6 represents a mixing ratio of deionized water, anhydrous citric acid and triethylamine of 10 mL: 15 g: 1 mL.
Sc7 represents a mixing ratio of deionized water, anhydrous citric acid and triethylamine of 10 mL: 15 g: 1.5 mL.
Sc8 represents a mixing ratio of deionized water, anhydrous citric acid and triethylamine of 10 mL: 15 g: 2 mL.
As can be seen from FIG. 1, when the mixing ratio of deionized water, citric acid and triethylamine in the modification solvent was 10 mL: 15 g: 0.5mL, the open circuit voltage of the evaporation-driven power generation material reached a maximum of 0.34V.
2. Fig. 2 is a Scanning Electron Microscope (SEM) of sugar cane before modification.
As can be seen from figure 2, the interior of the sugar cane is of a porous channel structure.
3. FIG. 3 shows the results of the open circuit voltage measurements of the evaporation-driven power generation material at different heights, i.e., 1cm, 1.5cm, 2 cm, 3 cm, 4 cm and 5 cm.
As can be seen from fig. 3, the performance is optimal when the height is 1.5 cm.
4. Fig. 4 is a test result of open circuit voltage of the evaporation driven power generation material in the series case.
It can be seen from fig. 4 that there is a series effect of the evaporation driven power generation material.
5. Fig. 5 is a test result of short circuit current of the evaporation driven power generation material in the parallel case.
It can be seen from fig. 5 that there is a parallel effect of the evaporation driven power generation material.
Fourthly, application:
example 1
The electric energy output by the evaporation driving power generation material is rectified and stored, and a small bulb and a small fan can be lightened.
Example 2
The electric energy output by the evaporation driving power generation material is rectified and stored, and the mobile phone can be charged.
Claims (6)
1. A preparation method of a sugarcane-based evaporation-driven power generation material is characterized by comprising the following steps:
1) soaking the sugarcane sheets to remove sugar in the sugarcane, and obtaining the sugarcane after sugar removal;
2) freeze-drying the sugar-removed sugarcane to obtain dried sugarcane;
3) placing the dried sugarcane in a modified solvent consisting of water, citric acid and triethylamine for carboxylation modification reaction, then washing with acetone and deionized water, and freeze-drying to obtain modified sugarcane;
4) and fixing the electrodes on the upper and lower surfaces of the modified sugarcane through waterproof adhesive tapes to obtain the evaporation-driven power generation material.
2. The method for producing a sugarcane-based evaporation-driven power generation material as claimed in claim 1, wherein the sugarcane sheet height in step 1) is 1.5 cm.
3. The method for preparing a sugarcane-based evaporation-driven power generation material as claimed in claim 1, wherein the mixing ratio of water, citric acid and triethylamine in the modified solvent is 10 mL: 15 g: 0.5 mL.
4. The method for preparing the sugarcane-based evaporation-driven power generation material according to claim 1, wherein the carboxylation modification reaction in the step 3) is carried out by sealing with preservative film and tinfoil and then placing into a 120 ℃ oven for treatment for 4 hours.
5. The method for preparing the sugarcane-based evaporation-driven power generation material as claimed in claim 1, wherein the electrode in the step 4) is a stainless steel metal mesh or a copper foil.
6. The method for preparing sugarcane-based evaporation-driven power generation material as claimed in claim 5, wherein the stainless steel metal mesh is 400 mesh stainless steel 304, the diameter of the single metal wire is 0.03mm, and the conductivity of the metal mesh is 3 Ω/m.
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| CN101239305A (en) * | 2008-03-06 | 2008-08-13 | 上海交通大学 | Method for preparing modified plant fibrous sale price biological adsorption agent |
| CN106208810A (en) * | 2015-04-29 | 2016-12-07 | 华中科技大学 | A kind of preparation method of the electrification component for evaporating generating |
| CN111600511A (en) * | 2020-01-09 | 2020-08-28 | 盐城师范学院 | Preparation method of one-dimensional carboxylated carbon material-based photovoltaic and moisture power generation device |
| CN112279331A (en) * | 2020-09-27 | 2021-01-29 | 盐城师范学院 | Preparation method of power generation and water purification production integrated functional area |
| CN112340730A (en) * | 2020-11-24 | 2021-02-09 | 海南大学 | Preparation method of microporous carbon-rich material based on carboxylation anchoring effect |
| CN112737412A (en) * | 2020-12-25 | 2021-04-30 | 海南大学 | Preparation method of sandwich-structured wood-based evaporation-photovoltaic cooperative power generation device |
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2021
- 2021-07-13 CN CN202110787479.8A patent/CN113364352B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101239305A (en) * | 2008-03-06 | 2008-08-13 | 上海交通大学 | Method for preparing modified plant fibrous sale price biological adsorption agent |
| CN106208810A (en) * | 2015-04-29 | 2016-12-07 | 华中科技大学 | A kind of preparation method of the electrification component for evaporating generating |
| CN111600511A (en) * | 2020-01-09 | 2020-08-28 | 盐城师范学院 | Preparation method of one-dimensional carboxylated carbon material-based photovoltaic and moisture power generation device |
| CN112279331A (en) * | 2020-09-27 | 2021-01-29 | 盐城师范学院 | Preparation method of power generation and water purification production integrated functional area |
| CN112340730A (en) * | 2020-11-24 | 2021-02-09 | 海南大学 | Preparation method of microporous carbon-rich material based on carboxylation anchoring effect |
| CN112737412A (en) * | 2020-12-25 | 2021-04-30 | 海南大学 | Preparation method of sandwich-structured wood-based evaporation-photovoltaic cooperative power generation device |
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