A high-performance bamboo fiber special paper-based triboelectric nanogenerator and its preparation method

Abstract

The present invention discloses a high-performance bamboo fiber special paper-based triboelectric nanogenerator and its preparation method. The triboelectric nanogenerator uses bamboo fiber paper as the cellulose substrate, in which a polyhydroxy polyurethane-based glassy polymer is in-situ synthesized to obtain bamboo fiber special paper. The bamboo fiber special paper and a triboelectric negative material are printed with a conductive material on the back, and then assembled by connecting wires. The present invention utilizes the advantages of the porous structure of bamboo fiber paper and combines an efficient in-situ polymerization strategy to in-situ synthesize a recyclable thermosetting polymer with strong electron-donating ability, thereby endowing the bamboo fiber paper with strong electron-donating ability and serving as a triboelectric positive material to improve the output performance and stability of the triboelectric nanogenerator. It not only realizes the preparation of high-performance fiber paper with green environmental protection, but also lays a foundation for the high-value utilization of bamboo fiber, providing a new idea for the preparation of cellulose-based triboelectric nanogenerators.

Description

Technical Field

[0001] The present invention relates to the technical field of triboelectric nanogenerators, and particularly to a high-performance bamboo fiber special paper-based triboelectric nanogenerator and a preparation method thereof. Background Art

[0002] According to the latest statistical data, the bamboo forest area in China reaches 7.01 million hectares, making China the country with the richest bamboo resources in the world. The bamboo resources, area, and stock volume all rank first in the world, and it is truly a "Bamboo Kingdom". The utilization of bamboo fiber is one of the most important ways of bamboo utilization, but currently, the utilization methods of bamboo fiber are very limited, confined to traditional industries such as artificial boards and pulp papermaking. Therefore, in view of the huge biological stock volume of bamboo fiber and the limited development and utilization status, new bamboo fiber utilization methods are urgently needed to be developed.

[0003] In recent years, the preparation of cellulose paper-based triboelectric nanogenerators (TENGs) based on cellulose paper has become a hot topic in the field of biomaterial TENGs. A TENG is a new type of self-powered device that can convert the mechanical motion of ambient energy into electrical energy, and it has advantages such as high output voltage, high power density, high energy conversion efficiency, environmental friendliness, and low manufacturing cost. However, when traditional cellulose paper is directly used as the positive friction layer, the relatively weak electron-donating ability of cellulose makes it difficult for paper-based TENGs to achieve high-voltage output performance. The most common way to improve the electron-donating ability of cellulose is to chemically modify cellulose to introduce functional groups with high triboelectric polarity, such as methyl and amine / amino groups. However, this chemical modification process usually involves complex chemical reactions and the use of highly toxic organic solvents, making large-scale production difficult. Summary of the Invention

[0004] The object of the present invention is to provide a high-performance bamboo fiber special paper-based triboelectric nanogenerator and a preparation method thereof for the above-mentioned problems. The present invention utilizes the porous structure advantage of bamboo fiber paper and combines an efficient in-situ polymerization strategy to in-situ synthesize a recyclable thermosetting polymer - polyurethane-based vitrimer (PHUvitrimer) with strong electron-donating ability, thereby endowing bamboo fiber paper with strong electron-donating ability and serving as a triboelectric positive material to improve the output performance and stability of the triboelectric nanogenerator. It not only realizes the preparation of high-performance fiber paper with green environmental protection but also lays a foundation for the high-value utilization of bamboo fiber, providing a new idea for the preparation of cellulose-based triboelectric nanogenerators.

[0005] The technical solution adopted by the present invention is as follows: A preparation method of a high-performance bamboo fiber special paper-based triboelectric nanogenerator, wherein the triboelectric nanogenerator uses bamboo fiber paper as a cellulose substrate, and PHUvitrimer is synthesized in-situ in the bamboo fiber paper to obtain bamboo fiber special paper. The bamboo fiber special paper and a triboelectric negative material are printed with a conductive material on the back, and then connected to a wire and assembled to form.

[0006] Further, the thickness of the bamboo fiber special paper is 0.1 - 0.2 mm. For example, it can be 0.1 mm, 0.15 mm, 0.2 mm, etc. Its thickness should not be too thin or too thick. If it is too thin, the mechanical properties are poor and it is difficult to meet the use environment; if it is too thick, the output power is low, which is not conducive to the expansion of the triboelectric power generation application field.

[0007] Further, the length of the bamboo fiber is preferably 1 - 2 mm, and the diameter is more suitable at 20 - 50 μm.

[0008] Further, the triboelectric negative material is a kind of polymer film, and the material is selected from one of polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), and rubber.

[0009] Further, the conductive material is conductive copper paste.

[0010] Further, the printing method is screen printing.

[0011] Further, the preparation method of the bamboo fiber special paper includes the following steps:

[0012] A. Put the bamboo fiber into deionized water, disperse it evenly by ultrasonic wave to obtain a bamboo fiber dispersion liquid. Pour the bamboo fiber dispersion liquid into a paper sheet forming machine for suction filtration to form paper, and then place the paper in a dryer for hot pressing and drying to form bamboo fiber paper;

[0013] B. Mix bis(hexacyclic) carbonate (BCC) and polyethyleneimine (PEI) in proportion and dissolve them in a solvent (for example, it can be dichloromethane) to obtain a mixed solution. Drop the mixed solution evenly onto the bamboo fiber paper. After the solvent volatilizes, place the bamboo fiber paper in an oven and heat and cure it at 90 - 100 °C for 10 - 12 h to obtain it.

[0014] Further, in step A, the mass concentration of bamboo fiber in the bamboo fiber dispersion liquid is 0.1 - 0.2 g / mL. For example, it can be 0.1 g / mL, 0.12 g / mL, 0.15 g / mL, 0.2 g / mL, etc.

[0015] Further, in step A, the hot pressing pressure is 0.4 - 0.8 MPa (for example, it can be 0.4 MPa, 0.5 MPa, 0.6 MPa, 0.8 MPa, etc.), and the hot pressing temperature is 90 - 110 °C, for example, it can be 90 °C, 100 °C, 105 °C, 110 °C, etc.

[0016] Further, in step B, the molar ratio of bis(hexacyclic) carbonate to polyethyleneimine is 0.5 - 1.5:1. For example, it can be 0.5:1, 0.8:1, 1:1, 1.5:1, etc. The molar ratio of bis(hexacyclic) carbonate to polyethyleneimine should not be too small or too large. If it is too small, the network crosslinking density formed is relatively low, affecting the improvement of the special mechanical properties of bamboo fibers; if it is too large, there are fewer electron-donating groups in the network structure, which is not conducive to improving the output power of the triboelectric generator.

[0017] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0018] 1. Without complex chemical modification of bamboo fibers, the present invention utilizes the advantages of the porous structure of bamboo fibers and combines an efficient in-situ polymerization strategy to in-situ synthesize a recyclable thermosetting polymer with strong electron-donating ability - PHU vitrimer in the pores of bamboo fibers, thereby endowing bamboo fiber paper with strong electron-donating ability and achieving the purpose of replacing traditional polymer-based triboelectric positive materials with bamboo fiber paper;

[0019] 2. The open-circuit voltage of the triboelectric nanogenerator of the present invention can reach up to 110 V at most, and the short-circuit current can reach up to 4 μA at most, with excellent power generation performance;

[0020] 3. The bamboo fiber special paper-based triboelectric nanogenerator of the present invention not only has good electrical output performance, but also has a simple and efficient preparation process, and can realize large-scale industrial production. This not only lays a foundation for the high-value utilization of bamboo fibers, but also provides a new idea for the preparation of cellulose-based triboelectric nanogenerators. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a high-performance bamboo fiber special paper-based triboelectric nanogenerator of the present invention;

[0022] Figure 2 It is a graph showing the relationship between the open-circuit voltage and time of the high-performance bamboo fiber special paper-based triboelectric nanogenerator in Example 1 of the present invention;

[0023] Figure 3 It is a graph showing the relationship between the short-circuit current and time of the high-performance bamboo fiber special paper-based triboelectric nanogenerator in Example 1 of the present invention;

[0024] Figure 4Relationship diagram between open - circuit voltage and pressure of the high - performance bamboo fiber special paper - based triboelectric nanogenerator in Embodiment 1 of the present invention;

[0025] Figure 5 Relationship diagram between short - circuit current and pressure of the high - performance bamboo fiber special paper - based triboelectric nanogenerator in Embodiment 1 of the present invention.

[0026] Reference numerals: 1 is the first conductive copper paste, 2 is the triboelectric negative layer, 3 is the bamboo fiber special paper, and 4 is the second conductive copper paste. Detailed implementation manners

[0027] The present invention will be described in detail below with reference to the accompanying drawings.

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Embodiment 1

[0030] (1) Preparation of bamboo fiber special paper:

[0031] S1. Weigh 1 g of bamboo fibers (average length 1.3 mm, average diameter 30 μm, bamboo type is 2 - year - old Phoebe zhennan) and pour them into deionized water, then ultrasonicate for 10 min to make the bamboo fibers evenly dispersed in the deionized water, obtaining a bamboo fiber dispersion (mass concentration is 0.1 g / mL); pour the bamboo fiber dispersion into a sheet - forming machine for vacuum filtration to form paper, and then place the paper in a flat vulcanizing machine, and hot - press and dry it at a temperature of 105 °C and a pressure of 0.6 MPa to obtain a bamboo fiber paper with a thickness of 0.1 mm;

[0032] S2. Weigh bis(hexacyclic) carbonate (BCC) and polyethyleneimine (PEI) in a molar ratio of 0.5:1, dissolve them in 2 mL of dichloromethane (CH2Cl2), stir evenly, and then evenly drop them onto the bamboo fiber paper. After the solvent has completely evaporated at room temperature, place the bamboo fiber paper in an oven at 90 °C and heat - cure it for 10 h to obtain the final bamboo fiber special paper.

[0033] The mechanical properties of the bamboo fiber special paper were measured. The tensile fracture strength of the prepared bamboo fiber special paper is 13.36 MPa, and the elongation at break is 52.93%.

[0034] (2) Preparation of bamboo fiber special paper - based triboelectric nanogenerator:

[0035] As Figure 1As shown, take the bamboo fiber special paper 3 prepared above as the triboelectric positive material, select polytetrafluoroethylene (PTFE) as the triboelectric negative material (triboelectric negative layer 2), use the screen printing process to print the first conductive copper paste 1 and the second conductive copper paste 4 on the back of the above two materials respectively, and connect the wires to the upper and lower electrodes, thus obtaining.

[0036] Contact separation power generation test was carried out on the triboelectric nanogenerator, the pressure range was 10 - 70 N, the frequency was 1 Hz, and the test results were: for the triboelectric nanogenerator prepared in this example, the highest open - circuit voltage was 110 V (as Figure 2 and Figure 4 shown), and the maximum short - circuit current was 4 μA (as Figure 3 and Figure 5 shown).

[0037] Example 2

[0038] (1) Preparation of bamboo fiber special paper:

[0039] S1. Weigh 1.5 g of bamboo fibers (average length 1.3 mm, average diameter 30 μm, bamboo type is 2 - year - old Phyllostachys edulis) and pour them into deionized water, then ultrasonicate for 10 min to make the bamboo fibers evenly dispersed in the deionized water, obtaining a bamboo fiber dispersion (mass concentration is 0.15 g / mL); pour the bamboo fiber dispersion into a sheet - making machine for suction filtration to form paper, and then place the paper in a flat vulcanizing machine, and hot - press and dry it under the conditions of a temperature of 105 °C and a pressure of 0.6 MPa to obtain a bamboo fiber paper with a thickness of 0.13 mm;

[0040] S2. Weigh bis(hexacyclic) carbonate (BCC) and polyethyleneimine (PEI) according to a molar ratio of 0.75:1, dissolve them in 2 mL of dichloromethane (CH2Cl2), stir evenly, then evenly drip them onto the bamboo fiber paper. After the solvent has completely volatilized at room temperature, put the bamboo fiber paper into an oven at 100 °C and heat - cure it for 10 h to obtain the final bamboo fiber special paper.

[0041] The mechanical properties of the bamboo fiber special paper were measured. The tensile fracture strength of the prepared bamboo fiber special paper was 17.09 MPa, and the elongation at break was 52.62%.

[0042] (2) Preparation of bamboo fiber special paper - based triboelectric nanogenerator:

[0043] As Figure 2 shown, take the bamboo fiber special paper 3 prepared above as the triboelectric positive material, select polytetrafluoroethylene (PTFE) as the triboelectric negative material (triboelectric negative layer 2), use the screen printing process to print the first conductive copper paste 1 and the second conductive copper paste 4 on the back of the above two materials respectively, and connect the wires to the upper and lower electrodes, thus obtaining.

[0044] The contact-separation power generation test of the triboelectric nanogenerator was carried out with a pressure range of 10 - 70 N and a frequency of 1 Hz. The test results were as follows: For the triboelectric nanogenerator prepared in this example, the highest open-circuit voltage was 80 V and the maximum short-circuit current was 1.5 μA.

[0045] Example 3

[0046] (1) Preparation of bamboo fiber special paper:

[0047] S1. Weigh 1.7 g of bamboo fibers (average length 1.3 mm, average diameter 30 μm, bamboo type is 2-year-old Phoebe zhennan) and pour them into deionized water, then ultrasonicate for 10 min to make the bamboo fibers evenly dispersed in the deionized water, obtaining a bamboo fiber dispersion (mass concentration is 0.17 g / mL); pour the bamboo fiber dispersion into a sheet former of a paper machine to filter it into paper, and then place the paper in a flat vulcanizing machine, and hot press and dry it into a shape under the conditions of a temperature of 105 °C and a pressure of 0.6 MPa, obtaining a bamboo fiber paper with a thickness of 0.15 mm;

[0048] S2. Weigh bis(hexacyclic) carbonate (BCC) and polyethyleneimine (PEI) in a molar ratio of 1:1 and dissolve them in 2 mL of dichloromethane (CH₂Cl₂), stir evenly, and then evenly drip it into the bamboo fiber paper. After the solvent has completely evaporated at room temperature, put the bamboo fiber paper into an oven at 105 °C and heat and cure it for 11 h to obtain the final bamboo fiber special paper.

[0049] The mechanical properties of the bamboo fiber special paper were measured. The tensile fracture strength of the prepared bamboo fiber special paper was 20.39 MPa, and the elongation at break was 51.73%.

[0050] (2) Preparation of a bamboo fiber special paper-based triboelectric nanogenerator:

[0051] As Figure 1 shown, take the above-prepared bamboo fiber special paper 3 as the triboelectric positive material, select polytetrafluoroethylene (PTFE) as the triboelectric negative material (triboelectric negative layer 2), and use screen printing technology to print the first conductive copper paste 1 and the second conductive copper paste 4 on the back of the above two materials respectively, and connect the wires to the upper and lower two electrodes, then it is obtained.

[0052] The contact-separation power generation test of the triboelectric nanogenerator was carried out with a pressure range of 10 - 70 N and a frequency of 1 Hz. The test results were as follows: For the triboelectric nanogenerator prepared in this example, the highest open-circuit voltage was 50 V and the maximum short-circuit current was 1 μA.

[0053] Example 4

[0054] (1) Preparation of bamboo fiber special paper:

[0055] S1. Weigh 2 g of bamboo fibers (average length 1.3 mm, average diameter 30 μm, bamboo type is 2-year-old Phyllostachys heterocycla var. pubescens) and pour them into deionized water, then ultrasonicate for 10 min to evenly disperse the bamboo fibers in the deionized water, obtaining a bamboo fiber dispersion. Pour the bamboo fiber dispersion into a sheet former for filtration to form paper, and then place the paper in a flat vulcanizing machine and hot-press and dry it at a temperature of 105 °C and a pressure of 0.6 MPa to obtain bamboo fiber paper with a thickness of 0.2 mm.

[0056] S2. Weigh bis(hexacyclic) carbonate (BCC) and polyethyleneimine (PEI) in a molar ratio of 1.5:1 and dissolve them in 2 mL of dichloromethane (CH2Cl2), stir evenly, and then evenly drip the solution onto the bamboo fiber paper. After the solvent has completely evaporated at room temperature, place the bamboo fiber paper in an oven at 110 °C and heat and cure it for 12 h to obtain the final bamboo fiber special paper.

[0057] Measure the mechanical properties of the bamboo fiber special paper. The tensile fracture strength of the prepared bamboo fiber special paper is 23.57 MPa, and the elongation at break is 51.27%.

[0058] (2) Preparation of a bamboo fiber special paper-based triboelectric nanogenerator:

[0059] As shown in Figure 1 , take the bamboo fiber special paper 3 prepared above as the triboelectric positive material, select polytetrafluoroethylene (PTFE) as the triboelectric negative material (triboelectric negative layer 2), and use screen printing technology to print the first conductive copper paste 1 and the second conductive copper paste 4 on the back of the above two materials respectively, and connect the wires to the upper and lower electrodes to obtain the triboelectric nanogenerator.

[0060] Conduct contact-separation power generation tests on the triboelectric nanogenerator. The pressure range is 10 - 70 N, and the frequency is 1 Hz. The test results show that for the triboelectric nanogenerator prepared in this example, the highest open-circuit voltage is 35 V, and the maximum short-circuit current is 0.6 μA.

[0061] The relevant properties of the bamboo fiber special paper and the triboelectric nanogenerator prepared in the above Examples 1 - 4 are shown in Table 1.

[0062] Table 1 Relevant properties of the bamboo fiber special paper and the triboelectric nanogenerator in Examples 1 - 4

[0063] Project Example 1 Example 2 Example 3 Example 4 Bamboo fiber paper thickness, mm 0.1 0.13 0.15 0.2 BCC:PEI 0.5:1 0.75:1 1:1 1.5:1 Tensile fracture strength, MPa 13.36 17.09 20.39 23.57 Elongation at break, % 52.93 52.62 51.73 51.27 Open circuit voltage, V 110 80 50 35 Short circuit current, μA 4 1.5 1 0.6

[0064] As can be seen from Table 1, as the thickness of the bamboo fiber paper and the BCC ratio increase, although the strength of the bamboo fiber special paper increases, the elongation at break gradually decreases. This shows that the thickness of the bamboo fiber paper and the addition amount of BCC will affect the strength and elongation performance of the bamboo fiber special paper. Further, from the experimental data of the open-circuit voltage and short-circuit current, it can be seen that as the thickness of the bamboo fiber paper and the BCC ratio increase, the open-circuit voltage and short-circuit current of the triboelectric nanogenerator also gradually decrease. This shows that the thickness of the bamboo fiber paper and the addition amount of BCC will also affect the power generation performance of the triboelectric nanogenerator.

[0065] Further, taking Example 1 as a reference example, the following comparative tests were carried out:

[0066] Comparative Example 1

[0067] (1) Preparation of wood fiber special paper:

[0068] S1. Weigh 1 g of wood fibers (average length 1.3 mm, average diameter 30 μm, bamboo type is 2-year-old pine) and pour them into deionized water, then ultrasonicate for 10 min to make the wood fibers evenly dispersed in the deionized water, obtaining a wood fiber dispersion (mass concentration 0.1 g / mL); pour the wood fiber dispersion into a paper sheet forming machine for suction filtration into paper, and then place the paper in a flat vulcanizing machine, and hot press and dry it at a temperature of 105 °C and a pressure of 0.6 MPa to obtain a wood fiber paper with a thickness of 0.1 mm;

[0069] S2. Weigh bis(hexacyclic) carbonate (BCC) and polyethyleneimine (PEI) in a molar ratio of 0.5:1 and dissolve them in 2 mL of dichloromethane (CH2Cl2), stir evenly, then evenly drop them onto the wood fiber paper. After the solvent has completely evaporated at room temperature, put the wood fiber paper into an oven at 90 °C and heat and cure it for 10 h to obtain the final wood fiber special paper.

[0070] The mechanical properties of the wood fiber special paper were measured. The tensile fracture strength of the prepared wood fiber special paper was 10.50 MPa, and the elongation at break was 50.01%.

[0071] (2) Preparation of a wood fiber special paper-based triboelectric nanogenerator:

[0072] According to Figure 2 the shown structural type, take the above-prepared wood fiber special paper as the triboelectric positive material, select polytetrafluoroethylene (PTFE) as the triboelectric negative material, use screen printing technology to print the first conductive copper paste and the second conductive copper paste on the back of the above two materials respectively, and connect the wires to the upper and lower electrodes, then it is obtained.

[0073] The contact-separation power generation test was conducted on this triboelectric nanogenerator with a pressure range of 10 - 70 N and a frequency of 1 Hz. The test results were as follows: the highest open-circuit voltage of this triboelectric nanogenerator was 85 V, and the maximum short-circuit current was 2.9 μA.

[0074] Compared with Example 1 of the present invention, the strength and elongation at break of the wood fiber special paper are significantly inferior to those of the bamboo fiber special paper prepared in Example 1 of the present invention. At the same time, the power generation performance of the triboelectric nanogenerator assembled from the wood fiber special paper is also inferior to that of Example 1 of the present invention. Thus, it can be seen that bamboo fiber has obvious technical advantages over wood fiber in the preparation of triboelectric nanogenerators.

[0075] Comparative Example 2

[0076] Regarding the construction of PHU vitrimer (recyclable thermoset polymer) in the bamboo fiber special paper, in this comparative example, PEI was replaced with the biomass amine Priamine 1074. The specific steps are as follows:

[0077] (1) Preparation of bamboo fiber special paper:

[0078] S1. Weigh 1 g of bamboo fibers (average length 1.3 mm, average diameter 30 μm, bamboo type is 2-year-old Phyllostachys edulis) and pour them into deionized water, then ultrasonicate for 10 min to make the bamboo fibers evenly dispersed in the deionized water, obtaining a bamboo fiber dispersion (mass concentration 0.1 g / mL). Pour the bamboo fiber dispersion into a sheet former for vacuum filtration to form paper, and then place the paper in a flat vulcanizing machine and hot press and dry it at a temperature of 105 °C and a pressure of 0.6 MPa to obtain bamboo fiber paper with a thickness of 0.1 mm.

[0079] S2. Weigh bis(hexacyclic) carbonate (BCC) and Priamine 1074 in a molar ratio of 0.5:1 and dissolve them in 2 mL of dichloromethane (CH2Cl2), stir evenly, and then evenly drip it onto the bamboo fiber paper. After the solvent has completely evaporated at room temperature, put the bamboo fiber paper into an oven at 90 °C and heat and cure it for 10 h to obtain the final bamboo fiber special paper.

[0080] The mechanical properties of this bamboo fiber special paper were measured. The tensile fracture strength of the prepared bamboo fiber special paper was 6.93 MPa, and the elongation at break was 67.97%.

[0081] (2) Preparation of bamboo fiber special paper-based triboelectric nanogenerator:

[0082] Take the above-prepared special bamboo fiber paper as the triboelectric positive material, select polytetrafluoroethylene (PTFE) as the triboelectric negative material, use the screen printing process to print the first conductive copper paste and the second conductive copper paste on the back of the above two materials respectively, and connect the wires to the upper and lower electrodes, thus obtaining.

[0083] Conduct contact-separation power generation tests on the triboelectric nanogenerator, with the pressure range of 10 - 70 N and the frequency of 1 Hz. The test results are as follows: For the triboelectric nanogenerator prepared in this embodiment, the highest open-circuit voltage is 30 V, and the maximum short-circuit current is 0.15 μA.

[0084] Compared with Embodiment 1 of the present invention, the strength of the special bamboo fiber paper in Comparative Example 2 is significantly inferior to that of the special bamboo fiber paper prepared in Embodiment 1 of the present invention. At the same time, the power generation performance of the triboelectric nanogenerator assembled from the special bamboo fiber paper prepared in Comparative Example 2 is also inferior to that of Embodiment 1 of the present invention. Thus, it can be seen that in the preparation of triboelectric nanogenerators, the use effect of PEI is significantly better than that of the biomass amine Priamine 1074.

[0085] Comparative Example 3

[0086] Comparative Example 3 is the same as Embodiment 1, except that the molar ratio of bis(hexacyclic) carbonate to polyethyleneimine is 2:1.

[0087] Test results: The tensile fracture strength of the special bamboo fiber paper obtained in Comparative Example 3 is 10.67 MPa, and the elongation at break is 20.1%. At the same time, the highest open-circuit voltage of the triboelectric nanogenerator obtained is 10 V, and the maximum short-circuit current is 0.1 μA.

[0088] Thus, it can be seen that when the dosage of bis(hexacyclic) carbonate is too much, it will significantly reduce the mechanical properties of the special bamboo fiber paper and the power generation performance of the triboelectric generator.

[0089] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A preparation method of a high-performance bamboo fiber special paper-based triboelectric nanogenerator, characterized in that The triboelectric nanogenerator is formed by using bamboo fiber paper as the cellulose substrate, in-situ synthesizing polyhydroxyurethane-based glass polymers in the bamboo fiber paper to obtain bamboo fiber special paper, printing conductive materials on the back of the bamboo fiber special paper with tribo-negative materials, and then connecting wires for assembly; The preparation method of the bamboo fiber special paper comprises the following steps: A. Put bamboo fibers into deionized water, disperse them evenly by ultrasonic treatment to obtain a bamboo fiber dispersion, pour the bamboo fiber dispersion into a paper sheet forming machine for suction filtration into paper, and then place the paper in a dryer for hot pressing and drying to form bamboo fiber paper; B. Mix bis(hexacyclic) carbonate and polyethyleneimine in proportion and dissolve them in a solvent to obtain a mixed solution. Drop the mixed solution evenly onto the bamboo fiber paper. After the solvent volatilizes, place the bamboo fiber paper in an oven and heat and cure it at 90-100 °C for 10-12 h to obtain the product.

2. The preparation method according to claim 1, wherein The thickness of the bamboo fiber special paper is 0.1-0.2 mm.

3. The preparation method according to claim 2, characterized in that, The tribo-negative material is selected from one of polytetrafluoroethylene, polyethylene terephthalate, and rubber.

4. The preparation method according to claim 3, characterized in that, The conductive material is conductive copper paste.

5. The preparation method according to claim 4, characterized in that, The printing method is screen printing.

6. The preparation method according to claim 1, wherein In step A, the mass concentration of bamboo fibers in the bamboo fiber dispersion is 0.1-0.2 g / mL.

7. The preparation method according to claim 6, characterized in that, In step A, the pressure of hot pressing is 0.4-0.8 MPa, and the hot pressing temperature is 90-110 °C.

8. The preparation method according to claim 7, characterized in that, In step B, the molar ratio of bis(hexacyclic) carbonate to polyethyleneimine is 0.5-1.5:

1.

9. A high-performance bamboo fiber special paper-based triboelectric nanogenerator, characterized in that, The triboelectric nanogenerator is prepared by the preparation method according to any one of claims 1-8 above.

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