CN113364352B - Preparation method of evaporation driving power generation material based on sugarcane - Google Patents
Preparation method of evaporation driving power generation material based on sugarcane Download PDFInfo
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- CN113364352B CN113364352B CN202110787479.8A CN202110787479A CN113364352B CN 113364352 B CN113364352 B CN 113364352B CN 202110787479 A CN202110787479 A CN 202110787479A CN 113364352 B CN113364352 B CN 113364352B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- 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 an evaporation driving power generation material based on sugarcane belongs to the technical field of new energy. Soaking the sugarcane sheet to remove sugar in the sugarcane to obtain sugared sugarcane; freeze-drying the sugared sugarcane to obtain dried sugarcane, then performing carboxylation modification reaction in a modification solvent consisting of citric acid and triethylamine, and then washing 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 driving power generation material. The invention has simple structure, convenient operation and low cost, is suitable for large-scale generation, and the prepared device can convert energy in the spontaneous evaporation process of the solution into electric energy and can be used for instant power supply of electronic devices through proper serial/parallel connection.
Description
Technical Field
The invention belongs to the technical field of new energy, and particularly relates to preparation of an evaporation driving power generation material based on sugarcane.
Background
With the continuous development of nano science and technology in recent years, researchers find that more and more mechanical energy of low-frequency mechanical motion or other low-grade energy sources which are difficult to utilize before are converted into forms of electric energy, such as triboelectricity, electret, piezoelectricity, thermoelectricity, photovoltaic power generation and the like. Among them, the water-based power generation is a clean and potential-great way.
2017. The phenomenon of the photovoltaic power generation has made a major breakthrough for years, and researchers have found that the flowing potential can be used for generating electric energy under the condition that no external force is needed. Foreign journal Nature Nanotechnology reports that power generation can be achieved by simply inserting the plasma treated carbon black sheet into a beaker containing deionized water. In such devices, closely packed porous carbon nanoparticles form a continuous microchannel, and water permeates into the porous carbon nanotubes under capillary pressure and natural evaporation, causing a streaming potential, and the open circuit voltage generated by the device can reach about 1V. However, most of these nano-generators are based on porous materials, such as carbon black, metal oxides, cellulose paper, etc., and do not belong to natural materials, require multiple processing, and are not very extensive in source, complex in construction and high in cost.
Disclosure of Invention
The invention provides a preparation method of an evaporation power generation material based on sugarcane, which aims to solve the problems of low source, complex structure and high cost of the existing evaporation-driven nano power generator.
The invention comprises the following steps:
1) Soaking the sugarcane sheet to remove sugar in the sugarcane to obtain sugared sugarcane;
2) Freeze-drying the sugared sugarcane to obtain dried sugarcane;
3) Placing the dried sugarcane in a modified solvent composed 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) The electrode is fixed on the upper surface and the lower surface of the modified sugarcane through waterproof adhesive tape, and the evaporation driving power generation material is obtained.
The invention adopts natural biomass material sugarcane as key base material, freeze-dries after washing and soaking sugar in the sugarcane, carboxylates and modifies the sugarcane by triethylamine and citric acid, couples electrodes on the upper and lower surfaces of the modified sugarcane, and soaks the sugarcane into deionized water, water molecules automatically absorb water through the self-pore canal structure of the sugarcane, spontaneous evaporation driving power generation is realized, and under the optimized condition, the open-circuit voltage and the short-circuit current density of a single material in aqueous solution can reach 0.34V and 10 mA/m 2 。
The device has simple structure, convenient operation and low cost, is suitable for large-scale generation, can convert 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 serial/parallel connection.
Further, the height of the sugarcane sheet in the step 1) is 1.5. 1.5 cm. When the height of the sugarcane sheet is 1.5 and cm, the open-circuit voltage of the evaporation driving power generation material is maximum, and the performance is optimal. When the height of the sugarcane increases from 1.5cm, the open-circuit voltage of the evaporation-driven power generation material tends to decrease, because as the height of the inner pore canal of the sugarcane increases, moisture hardly reaches the electrode surface at the top of the sugarcane, and it is difficult to form a current loop of the power generation device, resulting in poor performance in measurement, and the performance at the height of the sugarcane is 1cm is also inferior to that at the time of 1.5cm, because the sugarcane is bent along with the expansion of the water at the height of 1cm, serious deformation occurs, resulting in poor performance, and according to the experimental results, 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 0.5mL. The open circuit voltage of the evaporation driving power generation material is maximum and the performance is optimal under the mixing ratio condition.
In order to fully carry out the reaction and obtain the completely modified material, the carboxylation modification reaction in the step 3) is carried out by sealing with a preservative film and tinfoil and then placing the sealed material into a 120 ℃ oven for treatment for 4 hours.
The electrode in the step 4) is stainless steel metal net or copper foil. The potential difference generated on the upper surface and the lower surface of the sugarcane is transmitted to a measuring instrument through a stainless steel metal net and a copper foil.
The stainless steel 304 with the stainless steel metal mesh number of 400 has the advantages that 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 is improved.
Drawings
Fig. 1 is a graph of open circuit voltage of an evaporation driven generator device prepared according to the present invention at different solution ratios.
Fig. 2 is an SEM photograph of sugarcane before modification.
Fig. 3 is a graph of open circuit voltage at different heights for an evaporation driven generator device made in accordance with the present invention.
Fig. 4 is a test result of open circuit voltage of the evaporation driven generator device prepared according to the present invention in series.
Fig. 5 is a test result of short-circuit current of the evaporation-driven generator device prepared in the present invention in parallel.
Detailed Description
1. Modifying sugarcane:
the sugar in the sugarcane sheet with the height of 1.5cm is removed by washing and soaking, and then the sugarcane sheet is freeze-dried (the cold well temperature is about-50 ℃ and the vacuum pressure is 1 pa) for 24 hours, so that the dried sugarcane is obtained.
22.5g of anhydrous citric acid powder is stirred and dispersed in 15 mL deionized water, 0.75 mL triethylamine solution is added and stirred fully for 30 min until the solution is dissolved, and a modified solution is obtained.
Immersing the dried sugarcane into a modifying solution, sealing the sugarcane with a preservative film and tinfoil, and then placing the sugarcane into a 120 ℃ oven for modification reaction for 4 hours.
After the reaction is finished, taking out the sugarcane, cleaning the sugarcane with acetone and deionized water for 3 to 4 times, and then freeze-drying (the cold well temperature is about-50 ℃ and the vacuum pressure is 1 pa) for 24 hours to obtain the modified sugarcane.
2. Preparing an evaporation driving power generation material:
and (3) respectively fixing stainless steel metal meshes (or copper foils) on the upper and lower surfaces of the modified sugarcane by using transparent adhesive tapes to obtain the evaporation driving power generation material.
The stainless steel metal net is stainless steel 304, the mesh number of the metal net is 400, the diameter of a single metal wire is 0.03-mm, and the conductivity of the metal net is 3 ohm/m.
The formed evaporation driving power generation material takes carboxylated modified sugarcane as a power generation unit and takes a stainless steel metal net (or copper foil) as an electrode.
3. Performance test and results of evaporation-driven power generation material:
1. fig. 1 is an open circuit voltage test result of an evaporation driven power generation material.
Sc0 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio of 0:0:0.
Sc1 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio of 10 mL:0 g:0.5: 0.5mL.
Sc2 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio of 10 mL:15 g:0 mL.
Sc3 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio of 10 mL:15 g:0.1 mL.
Sc4 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio of 10 mL:15 g:0.25 mL.
Sc5 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio of 10 mL:15 g:0.5 mL.
Sc6 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio of 10 mL:15 g:1 mL.
Sc7 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio of 10 mL:15 g:1.5 mL.
Sc8 represents deionized water, anhydrous citric acid, and triethylamine in a mixing ratio 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 modified solvent was 10 mL:15 g:0.5 mL, 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 sugarcane prior to modification.
As can be seen from fig. 2, the inside of the sugarcane is of a porous structure.
3. Fig. 3 shows the results of open circuit voltage tests for the evaporation driven power generation materials at different heights, 1cm, 1.5cm, 2 cm, 3 cm, 4 cm, and 5cm, respectively.
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 case of series connection.
It can be seen from fig. 4 that there is a series effect of evaporation driving the 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.
4. Application:
example 1
The electric energy output by the evaporation driving power generation material is rectified and stored, so that 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, so that the mobile phone can be charged.
Claims (3)
1. The preparation method of the evaporation driving power generation material based on the sugarcane is characterized by comprising the following steps of:
1) Soaking a sugarcane sheet with the height of 1.5 and cm to remove sugar in sugarcane, and obtaining sugared sugarcane;
2) Freeze-drying the sugared sugarcane to obtain dried sugarcane;
3) Placing the dried sugarcane in a modified solvent composed of water, citric acid and triethylamine for carboxylation modification reaction, then washing with acetone and deionized water, and freeze-drying to obtain modified sugarcane; the mixing ratio of water, citric acid and triethylamine in the modifying solvent is 10mL to 15g to 0.5mL; sealing by adopting a preservative film and tinfoil during carboxylation modification reaction, and then placing the sealed materials in a 120 ℃ oven for treatment for 4 hours;
4) The electrode is fixed on the upper surface and the lower surface of the modified sugarcane through waterproof adhesive tape, and the evaporation driving power generation material is obtained.
2. The method for preparing the sugarcane-based evaporation-driven power generation material according to claim 1, wherein the electrode in the step 4) is a stainless steel metal mesh or copper foil.
3. The method for preparing the sugarcane-based evaporation-driven power generation material according to claim 2, wherein the stainless steel metal net is stainless steel 304 with the mesh number of 400, the diameter of a single metal wire is 0.03mm, and the conductivity of the metal net 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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- 2021-07-13 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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