CN115746392B - Modified friction power generation sponge, single-electrode sponge friction power generation device, and preparation and application thereof - Google Patents
Modified friction power generation sponge, single-electrode sponge friction power generation device, and preparation and application thereof Download PDFInfo
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- CN115746392B CN115746392B CN202211492393.3A CN202211492393A CN115746392B CN 115746392 B CN115746392 B CN 115746392B CN 202211492393 A CN202211492393 A CN 202211492393A CN 115746392 B CN115746392 B CN 115746392B
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- 238000010248 power generation Methods 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 27
- 229920001690 polydopamine Polymers 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 12
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 50
- 229960003638 dopamine Drugs 0.000 claims description 41
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims description 22
- 239000007853 buffer solution Substances 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 17
- 239000007983 Tris buffer Substances 0.000 claims description 16
- 239000002390 adhesive tape Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 13
- 239000000741 silica gel Substances 0.000 claims description 11
- 229910002027 silica gel Inorganic materials 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000000379 polymerizing effect Effects 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 239000002783 friction material Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 7
- 230000004044 response Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 abstract description 3
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 61
- 239000004205 dimethyl polysiloxane Substances 0.000 description 49
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 49
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 description 49
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 49
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 12
- 238000006116 polymerization reaction Methods 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 238000000926 separation method Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000001291 vacuum drying Methods 0.000 description 6
- 239000006260 foam Substances 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- 238000001338 self-assembly Methods 0.000 description 4
- 238000004210 cathodic protection Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- MDLRQEHNDJOFQN-UHFFFAOYSA-N methoxy(dimethyl)silicon Chemical compound CO[Si](C)C MDLRQEHNDJOFQN-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YASYEJJMZJALEJ-UHFFFAOYSA-N Citric acid monohydrate Chemical compound O.OC(=O)CC(O)(C(O)=O)CC(O)=O YASYEJJMZJALEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052956 cinnabar Inorganic materials 0.000 description 1
- 229960002303 citric acid monohydrate Drugs 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 dimethylsiloxane Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000128 polypyrrole Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- VNRWTCZXQWOWIG-UHFFFAOYSA-N tetrakis(trimethylsilyl) silicate Chemical compound C[Si](C)(C)O[Si](O[Si](C)(C)C)(O[Si](C)(C)C)O[Si](C)(C)C VNRWTCZXQWOWIG-UHFFFAOYSA-N 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Abstract
The invention relates to the technical field of friction nano generators, in particular to a modified friction power generation sponge, a single-electrode sponge friction power generation device and preparation and application thereof. The friction coupling material is loaded on the surface of the friction power generation sponge frame, wherein the friction coupling material is MXene-polydopamine particles. The modified friction power generation sponge can be used as a single-electrode sponge friction power generator device. The single-electrode sponge friction generator device can be used for energy collection, sea wave monitoring and the like, and has the advantages of simple preparation method, simple and convenient process flow, wide pressure response range, high sensitivity and long service life.
Description
Technical Field
The invention relates to the technical field of friction nano generators, in particular to a modified friction power generation sponge, a single-electrode sponge friction power generation device and preparation and application thereof.
Background
Since the invention, friction nano-generators utilize friction electrification effect and electrostatic coupling effect to quickly raise the hot tide of converting tiny mechanical energy into electric energy. Wave motion is repeated and around the clock, for example, wave energy and friction power generation are combined, energy is collected and converted into electric energy, and the method has important significance in directly supplying power to/monitoring ocean vessels, offshore devices and the like. The sponge structure is simple to synthesize, good in elasticity, small in relative displacement during the preparation of the friction generator, simple in packaging and integration, and very flexible in energy collection. The sponge friction generator can be used for solving the problems that friction materials are attenuated and friction charges cannot be generated in the sponge friction generator, each cavity in the sponge is used as a friction power generation unit, and the sponge friction generator is integrated with unit cavities; the sponge material has excellent mechanical property, sensitivity and wide pressure response performance, but the output performance of the pure sponge is low, and the practical use is limited, so that the material doping modification of the sponge is a common means. Common modification modes are: mixing conductive materials such as carbon nano tubes and the like with a PDMS matrix, and realizing friction power generation between hole walls due to the non-uniformity of doping; the Au nano-particles are immersed into the bottom of the hole of the PDMS to achieve the purpose of modifying the PDMS, so that the contact electrification of the Au nano-particles and the PDMS in the hole is achieved; the polypyrrole@Cu sponge (positive) and the PDMS sponge (negative) form a friction pair, so that the aim of increasing the output of the PDMS sponge is fulfilled. However, the preparation of the sponge needs multiple steps, has low mechanical properties and low durability, and the modification method has the problems of uneven modification and smaller output (not more than 200 nA) after modification, so that a new sponge preparation mode and modification mode are needed to be searched for preparing the sponge generator with high mechanical properties, high durability, uniform compounding and high output.
Disclosure of Invention
The invention aims to provide a modified friction power generation sponge, a single-electrode sponge friction power generation device and preparation and application thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the friction coupling material is loaded on the surface of the friction power generation sponge frame, wherein the friction coupling material is MXene-polydopamine particles.
The friction power generation sponge is soaked and modified by a trimethylol aminomethane buffer solution of MXene-dopamine, and the MXene and the surface of the sponge frame are polymerized under the action of the buffer solution of the dopamine.
The buffer solution of the MXene-dopamine in the tris buffer solution comprises the following components: weighing 50-100 mg of MXene, adding into 100-200 mL of ionized water, and stirring for 4h; adding Tris powder, and regulating the pH value of the MXene aqueous solution to 8.5; 50-200 mg of dopamine powder is added, tris powder is continuously added, the pH value of the solution is kept at 8.5, and the buffer solution of the Tris (hydroxymethyl) aminomethane of the MXene-dopamine is obtained.
The friction power generation sponge is
1) Pressing and forming sacrificial template salt particles in a mould;
2) Pouring silica gel into a mold, and heating and forming after slowly penetrating salt particles;
3) And taking the silica gel out of the die, and washing with water to remove the sacrificial template salt particles to obtain the friction power generation sponge.
4) And (3) immersing the sponge into a modifying solution after drying, and taking out the sponge after immersing for vacuum drying to obtain the modified friction power generation sponge.
Paving the sacrificial template salt particles into a mould for compaction, then adding silica gel, and heating at 50-80 ℃ for 2-1 h for forming; wherein the sacrificial template salt particles are one or more of NaCl, citric acid monohydrate, trisodium citrate dihydrate and dipotassium hydrogen phosphate.
The silica gel (PDMS) is prepared by mixing a matrix and a curing agent according to a mass ratio of 10:1, wherein the matrix is a Corning 184 silica gel precursor liquid (commercially available), and the curing agent is a curing agent selected by matching the Corning 184 silica gel precursor liquid (for example, dimethyl methyl hydrogen siloxane and tetramethyl tetra-vinyl cyclo-tetra-silicon oxyhydroxide, which are both commercially available and matched according to production specifications).
A preparation method of a modified friction power generation sponge comprises the steps of soaking and modifying the friction power generation sponge through a tris buffer solution of MXene-dopamine, and polymerizing the MXene and the surface of a sponge frame under the action of the buffer solution of the dopamine.
A single-electrode sponge friction power generation device comprises the modified friction power generation sponge.
The modified friction power generation sponge is used as a friction material, a Cu conductive adhesive tape is stuck on the back surface of the friction power generation sponge, the friction power generation sponge is fixed on an acrylic plate with a supporting function, and a Cu connecting wire outputs current.
The application of the single-electrode sponge friction power generation device prepared by the method is that the single-electrode sponge friction power generation device is applied to energy collection and sea wave monitoring.
The basic principle of the invention is as follows:
the modified friction power generation sponge (PDMS sponge) has PDA-MXene particles loaded on a sponge frame, and the loaded particles are distributed unevenly. Thus, when the sponge is pressurized, contact occurs between the frames of the sponge while the PDA-MXene particles are in contact with the bare PDMS. Since MXene has a strong electronegativity and has a higher ability to capture electrons than PDMS, a negative triboelectric charge can be obtained. The PDMS matrix acquired a frictional positive charge. When the force is unloaded, the PDMS has excellent elasticity, the sponge immediately returns to the original shape, and the MXene and the PDMS with opposite charges are separated. In the process of separating MXene from PDMS, the PDA is an excellent electron conductor, and negative charges in the MXene are transmitted to the PDA; PDMS is a good electret material with good ability to maintain polarization, inducing positive charges on Cu conductive tape to maintain electroneutrality, and creating transient currents in the external circuit. When the force is again applied, the MXene-PDA contacts the PDMS and electrons on the Cu electrode attached to the PDMS flow away, creating a reverse transient current.
When the PDMS sponge is immersed in the MXene solution, the MXene particles are easily adsorbed into the skeleton of the sponge due to the existence of stirring force and the adsorption effect of the foam. Under the adhesion of PDA, MXene and PDMS are combined by a new covalent bond C-O-Ti, so that the stability of the modified sponge is improved. In addition, dopamine, which is a phenolic compound, has the inherent property of scavenging active oxygen radicals, and after coupling with MXene, can improve the retention life of MXene in air.
The invention has the advantages that:
according to the invention, PDMS is prepared into porous sponge, and then modified to prepare a single electrode mode, so that the space inside the block material can be effectively utilized for friction power generation, and the volume power generation efficiency of the block material is increased; the relative displacement of the sponge single-electrode generator is small, the space required for completing contact and separation is small, and the integration is convenient; after the sponge is modified, the electronegativity is increased, the output performance is improved, and the sponge and modified particles are bonded by using the PDA, so that the effects of protecting MXene and improving the stability can be achieved.
According to the invention, the sheet MXene material with relatively negative electronegativity is adopted to carry out surface modification on PDMS, and MXene is anchored on the surface of PDMS by utilizing the adhesion of polydopamine, so that the output current is improved by more than 4 times.
Drawings
FIG. 1 is an SEM photograph of a PDMS sponge according to example 1 of the present invention
FIG. 2 is an SEM photograph of an MXene-PDA according to example 3 of the present invention
FIG. 3 is a strain-force curve of PDMS sponge according to example 1 of the present invention
FIG. 4 shows the short-circuit current of a single electrode TENG made of PDMS sponge according to example 1 of the present invention
FIG. 5 shows the open circuit potential of a single electrode TENG made of PDMS sponge according to example 1 of the present invention
FIG. 6 is a short-circuit current of a 1:1 modified PDMS sponge as a single electrode TENG in example 2 of the present invention
FIG. 7 is an open circuit potential of a 1:1 modified PDMS sponge as a single electrode TENG in example 2 of the present invention
FIG. 8 is a graph showing the short-circuit current of a 1:2 modified PDMS sponge as a single electrode TENG in example 3 of the present invention
FIG. 9 is an open circuit potential of a 1:2 modified PDMS sponge as a single electrode TENG in example 3 of the present invention
FIG. 10 is a graph showing the short-circuit current of a 1:4 modified PDMS sponge as a single electrode TENG in example 4 of the present invention
FIG. 11 is an open circuit potential of a 1:4 modified PDMS sponge as a single electrode TENG in example 4 of the present invention
FIG. 12 is a graph showing the short-circuit current of a modified PDMS sponge having a MXene-PDA concentration of 1:2 in accordance with example 5 of the present invention in a vertical contact separation mode TENG with Kapton
FIG. 13 is an open circuit potential of a modified PDMS sponge having a concentration of MXene-PDA of 1:2 in accordance with example 5 of the present invention in a vertical contact separation mode TENG with Kapton
FIG. 14 is a schematic diagram showing an open circuit of the invention in application example 1 in which 304SS was cathodically protected by a PDMS sponge modified with a MXene-PDA concentration of 1:2 in a vertical contact separation mode TENG with Kapton
FIG. 15 is a graph showing the current detected by sea waves in application example 2 of the present invention
Detailed Description
The present invention will be described in further detail below in order to make the objects, technical solutions and effects of the present invention more clear and definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
According to the invention, the friction power generation sponge is prepared by a method of sacrificing a template, and the PDA-MXene modified PDMS sponge is obtained through further doping; further, the adhesion of MXene on the surface of PDMS is regulated by using a PDA, so that the modified PDMS sponge has triboelectronegativity, and the single-electrode friction generator is obtained through simple preparation. The friction nano material and the generator have the advantages of simple preparation method, simple and convenient process flow, wide pressure response range, high sensitivity and long service life.
The invention is further illustrated by the following examples and figures.
Example 1
Preparation of friction power generation sponge:
1) Weighing a PDMS matrix and a curing agent according to the mass ratio of 10:1, and uniformly stirring, wherein the matrix is a corning 184 silica gel precursor liquid (commercially available, recorded in the product specification, 184 components of dimethylsiloxane oligomer containing vinyl end groups (> 60%), silica filler (30% -60%), tetra (trimethylsiloxy) silane (1% -5%) and ethylbenzene (< 1%), and a platinum catalyst; ) 13g of curing agent is 1.3g of curing agent (for example, dimethyl methyl hydrogen siloxane and tetramethyl tetravinyl cyclo-tetra-silicon oxyhydroxide which are matched according to the production description and are all commercially available) selected by matching the body fluid of the Corning 184 silica gel precursor.
2) KH was then dried 2 PO 4 (regular shape, long strip, 1-5mm length) particles are spread layer by layer to a cylinder shapeCompacting each layer of salt particles in a mould until the laying thickness of the salt particles reaches 25mm;
3) Pouring the PDMS solution which is uniformly stirred in the step 1) into the die which is paved with salt particles in the step 2), standing for 2 hours, then placing into a vacuum drying oven, and continuing to stand for 3 hours under the air pressure of 50 KPa; heating and curing a mould for containing PDMS, and heating for 2 hours at 60 ℃; after heating, flushing PDMS in the mould with a large amount of water while the temperature is still hot, taking down the mould, and carrying out ultrasonic desalting on the PDMS until the water is clear and has no color; and drying the PDMS sponge at 60 ℃, and taking out the PDMS sponge for later use to obtain the PDMS sponge (see figure 1).
As can be seen from fig. 1, the microstructure of the sponge is 3D interconnected, with the pore size in the sponge being much larger than the wall interior; in FIG. 1, the wall thickness is about 100 μm, and the wall thickness at individual locations can be up to 300 μm, with pore sizes ranging from about 400 μm to about 1200 μm; this indicates that the walls of the holes have sufficient room to complete the contact and separation movement. Fig. 3 can plot the compressive force of PDMS sponges at different strains, resulting in compressive strains of 10%, 20%, 30%, 40%, 50%, 60% and 80% at pressures of 6.2, 11.2, 16.7, 24.6, 79.1, 1556.6N, respectively. Small strains are easily achieved with small forces, but the force required to accomplish large strains increases dramatically. After 80% strain, the sponge still recovered to its original shape without damage, indicating that repeated compression of the sponge can be achieved and that the sponge has a strong recovery capacity.
Sticking PMDS sponge on Cu conductive adhesive tapes with equal areas; cu is connected with a wire to lead out electrons; the Cu conductive adhesive tape is fixed on an acrylic supporting plate with the thickness of 50mm multiplied by 50 mm; the friction power generation sponge and the induction electrode form a single-electrode friction nano-generator. In order to avoid the influence of the outside on the electric output performance of the modified sponge, a foam adhesive tape is stuck on the other side of the sponge. An acrylic plate for fixing a single electrode device was used to test the triboelectric properties (short-circuit current and open-circuit voltage) of the device by a linear motor-driven sponge using an electrometer (Keithley 6514). Each set of experimental data was measured for one hour to ensure that the sponge had sufficient charge time. Each set of experimental data was repeated three times with a maximum value as the final result, and it can be seen from fig. 4 to 5 that the short circuit current was 36nA and the open circuit voltage was 4V.
Example 2
Preparation of modified friction power generation sponge:
50mg of MXene is measured, added into 200mL of ionized water and stirred for 4 hours; adding Tris powder, and regulating the pH value of the MXene aqueous solution to 8.5; 50mg of dopamine powder is added, tris powder is continuously added, the pH value of the solution is kept at 8.5, and the buffer solution of the Tris (hydroxymethyl) aminomethane of MXene-dopamine is obtained. The PDMS sponge prepared in the previous example was trimmed to a specific shape and moistened with alcohol; and then put it into a buffer solution of MXene-dopamine in tris buffer with strongly stirred magnetons. In the self-assembly process, dopamine is polymerized on the surfaces of MXene and PDMS, and MXene particles are rapidly adsorbed into the sponge, so that the MXene can be fixed on the surface of the PDMS through the PDA. When PDA becomes an oligomer with a degree of polymerization of 2-4, dopamine stops polymerizing. With the polymerization of dopamine, the aqueous solution turns from pale yellow to brown and finally to black within tens of minutes, and is kept stirring for 12 hours; and taking out the black sponge, respectively soaking and cleaning with deionized water and alcohol, and then vacuum drying and taking out for later use.
Sticking the PMDS sponge prepared by the method on Cu conductive adhesive tapes with equal areas; cu is connected with a wire to lead out electrons; the Cu conductive adhesive tape is fixed on an acrylic supporting plate with the thickness of 50mm multiplied by 50 mm; the friction power generation sponge and the induction electrode form a single-electrode friction nano-generator. In order to avoid the influence of the outside on the electric output performance of the modified sponge, a foam adhesive tape is stuck on the other side of the sponge. The acrylic plate of the single electrode device was fixed, and the friction power generation performance (short circuit current and open circuit voltage) of the device was tested by linear motor driving sponge using an electrometer (Keithley 6514) (see fig. 6 and 7). Each set of experimental data was measured for one hour to ensure that the sponge had sufficient charge time. Each set of experimental data was repeated three times with the maximum value as the final result, and as can be seen from fig. 6 and 7, the short circuit current was 62nA and the open circuit voltage was 12V.
Example 3
Preparation of modified friction power generation sponge:
50mg of MXene is measured, added into 200mL of ionized water and stirred for 4 hours; adding Tris powder, and regulating the pH value of the MXene aqueous solution to 8.5; 100mg of dopamine powder is added, tris powder is continuously added, the pH value of the solution is kept at 8.5, and the buffer solution of the Tris (hydroxymethyl) aminomethane of MXene-dopamine is obtained. The PDMS sponge prepared in the previous example was trimmed to a specific shape and moistened with alcohol; and then the solution is put into a trimethylol aminomethane buffer solution of MXene-dopamine with strongly stirred magnetons, in the self-assembly process in the dopamine polymerization process, the dopamine is polymerized on the surfaces of the MXene and the PDMS, and the MXene particles are rapidly adsorbed into the sponge, so that the MXene can be fixed on the surface of the PDMS through the PDA. When PDA becomes an oligomer with a degree of polymerization of 2-4, dopamine stops polymerizing. With the polymerization of dopamine, the aqueous solution turns from pale yellow to brown and finally to black within tens of minutes, and is kept stirring for 12 hours; and taking out the black sponge, respectively soaking and cleaning with deionized water and alcohol, and then vacuum drying and taking out for later use. As can be seen from fig. 3, the spherical PDA particles are uniformly attached to the sides and sheets of the lamellar MXene.
Sticking the PMDS sponge prepared by the method on Cu conductive adhesive tapes with equal areas; cu is connected with a wire to lead out electrons; the Cu conductive adhesive tape is fixed on an acrylic supporting plate with the thickness of 50mm multiplied by 50 mm; the friction power generation sponge and the induction electrode form a single-electrode friction nano-generator. In order to avoid the influence of the outside on the electric output performance of the modified sponge, a foam adhesive tape is stuck on the other side of the sponge. And fixing an acrylic plate of the single-electrode device, and driving a sponge through a linear motor with the frequency of 1Hz. The triboelectric power generation performance (short-circuit current and open-circuit voltage) of the devices was tested using an electrometer (Keithley 6514). Each set of experimental data was measured for one hour to ensure that the sponge had sufficient charge time. Each set of experimental data was repeated three times with the maximum value as the final result, and it can be seen from fig. 8 and 9 that the short circuit current was 153nA and the open circuit voltage was 18V.
Example 4
Preparation of modified friction power generation sponge:
50mg of MXene is measured, added into 200mL of ionized water and stirred for 4 hours; adding Tris powder, and regulating the pH value of the MXene aqueous solution to 8.5; 200mg of dopamine powder is added, tris powder is continuously added, the pH value of the solution is kept at 8.5, and the buffer solution of the Tris (hydroxymethyl) aminomethane of MXene-dopamine is obtained. The PDMS sponge prepared in the previous example was trimmed to a specific shape and moistened with alcohol; and then the solution is put into a trimethylol aminomethane buffer solution of MXene-dopamine with strongly stirred magnetons, in the self-assembly process in the dopamine polymerization process, the dopamine is polymerized on the surfaces of the MXene and the PDMS, and the MXene particles are rapidly adsorbed into the sponge, so that the MXene can be fixed on the surface of the PDMS through the PDA. When PDA becomes an oligomer with a degree of polymerization of 2-4, dopamine stops polymerizing. With the polymerization of dopamine, the aqueous solution turns from pale yellow to brown and finally to black within tens of minutes, and is kept stirring for 12 hours; and taking out the sponge, respectively soaking and cleaning the sponge by deionized water and alcohol, and then vacuum drying and taking out the sponge for later use.
Sticking the PMDS sponge prepared by the method on Cu conductive adhesive tapes with equal areas; cu is connected with a wire to lead out electrons; the Cu conductive adhesive tape is fixed on an acrylic supporting plate with the thickness of 50mm multiplied by 50 mm; the friction power generation sponge and the induction electrode form a single-electrode friction nano-generator. In order to avoid the influence of the outside on the electric output performance of the modified sponge, a foam adhesive tape is stuck on the other side of the sponge. And fixing an acrylic plate of the single-electrode device, and driving a sponge through a linear motor with the frequency of 1Hz. The triboelectric power generation performance (short-circuit current and open-circuit voltage) of the devices was tested using an electrometer (Keithley 6514). Each set of experimental data was measured for one hour to ensure that the sponge had sufficient charge time. Each set of experimental data was repeated three times with the maximum value as the final result, and it can be seen from fig. 10 and 11 that the short circuit current was 111nA and the open circuit voltage was 17V.
Example 5
Preparation of modified friction power generation sponge:
50mg of MXene is measured, added into 200mL of ionized water and stirred for 4 hours; adding Tris powder, and regulating the pH value of the MXene aqueous solution to 8.5; 100mg of dopamine powder is added, tris powder is continuously added, the pH value of the solution is kept at 8.5, and the buffer solution of the Tris (hydroxymethyl) aminomethane of MXene-dopamine is obtained. The PDMS sponge prepared in the previous example was trimmed to a specific shape and moistened with alcohol; and then the solution is put into a trimethylol aminomethane buffer solution of MXene-dopamine with strongly stirred magnetons, in the self-assembly process in the dopamine polymerization process, the dopamine is polymerized on the surfaces of the MXene and the PDMS, and the MXene particles are rapidly adsorbed into the sponge, so that the MXene can be fixed on the surface of the PDMS through the PDA. When PDA becomes an oligomer with a degree of polymerization of 2-4, dopamine stops polymerizing. With the polymerization of dopamine, the aqueous solution turns from pale yellow to brown and finally to black within tens of minutes, and is kept stirring for 12 hours; and taking out the sponge, respectively soaking and cleaning the sponge by deionized water and alcohol, and then vacuum drying and taking out the sponge for later use.
Sticking the PMDS sponge obtained by modifying the PDA-MXene on a Cu conductive adhesive tape with the same area; cu is connected with a wire to lead out electrons; the Cu conductive adhesive tape is fixed on an acrylic supporting plate with the thickness of 50mm multiplied by 50 mm; the friction nano generator is in a vertical contact separation mode and is composed of friction power generation sponge, an induction electrode and another friction material-Kapton (0.15 mm thick). And fixing an acrylic plate of the single-electrode device, and enabling the sponge to be in periodic contact with and separated from the Kapton through a linear motor, wherein the frequency is 1Hz. The triboelectric power generation performance (short-circuit current and open-circuit voltage) of the devices was tested using an electrometer (Keithley 6514). Each set of experimental data was measured for one hour to ensure that the sponge had sufficient charge time. Each set of experimental data was repeated three times with the maximum value as the final result, and it can be seen from fig. 12 and 13 that the short circuit current was 697nA and the open circuit voltage was 79V.
Application example 1 cathodic protection
A cathodic protection experiment was performed using the friction nano-generator assembled in example 5 to obtain a vertical contact separation mode:
the acrylic plate of the single electrode device was fixed, the sponge was brought into and out of contact with the Kapton cycle by a linear motor, and the triboelectric performance (short-circuit current and open-circuit voltage) of the device was tested using an electrometer (Keithley 6514). Stainless steel, platinum sheet, ag/AgCl electrode and simulated seawater (3.5 wt.% NaCl) were combined into a three-electrode system and the cathodic protection potential of 304 stainless steel was tested using a cinnabar electrochemical workstation (CHI 760). Rectifying TENG by using a rectifier bridge, converting alternating current into direct current after rectification, keeping current pulse in the same direction, respectively connecting positive electrode and negative electrode of output current to a platinum sheet and 304SS in a three-electrode system, moving electrons generated by TENG to 304SS, protecting stainless steel by a cathode, and negatively moving potential. From FIG. 14, it can be seen that the modified PDMS sponge can lower the potential of 304SS from-0.13V to-0.42V, and exhibits excellent output stability at 3X 10 4 During the s period, the 304SS potential when protected was stabilized at-0.42V.
Application example 2 sea wave monitoring
Sea wave monitoring using the single electrode friction nano generator assembled in example 3:
vacuum packaging the modified single-electrode sponge TENG, placing into a water tank (120 cm×80cm×40 cm), and leading out the lead for measurement. The wave-making pump is placed in the water tank, the distance between the wave-making pump and the sponge is adjusted to be 10cm, and the test shows that the force generated by the wave-making pump on the sponge is small and is about 0.9-1.2N. The wave compressed the sponge and the sponge recovered by self elasticity, and the friction output current of the device was tested using an electrometer (Keithley 6514), and it can be seen from fig. 15 that the PDA-MXene modified PDMS sponge output current was 200nA at an output frequency of 1Hz of the wave making pump. Different wave levels and sea conditions correspond to different output currents by which the wave levels can be reflected.
Claims (5)
1. The modified friction power generation sponge is characterized in that a friction coupling material is loaded on the surface of a friction power generation sponge frame, wherein the friction coupling material is MXene-polydopamine particles;
soaking and modifying the friction power generation sponge by using a trimethylol aminomethane buffer solution of MXene-dopamine, and polymerizing the MXene and the surface of a sponge frame under the action of the buffer solution;
the friction power generation sponge is
1) Pressing and forming sacrificial template salt particles in a mould;
2) Pouring silica gel into a mold, and heating and forming after slowly penetrating salt particles;
3) Taking out the silica gel from the mold, and washing with water to remove the sacrificial template salt particles to obtain a friction power generation sponge;
4) Immersing the dried sponge into a modifying solution, taking out the sponge after immersing, and drying in vacuum to obtain a modified friction power generation sponge;
paving the sacrificial template salt particles into a die, compacting, adding silica gel, and heating at 50-80 ℃ for 2-1 h for molding; wherein the sacrificial template salt particles are dipotassium hydrogen phosphate;
the buffer solution of the MXene-dopamine in the tris buffer solution comprises the following components: weighing 50-100 mg of MXene, adding the MXene into 100-200 mL of ionized water, and stirring for 4-h; adding Tris powder, and adjusting the pH value of the MXene aqueous solution to 8.5; 50-200 mg of dopamine powder is added, tris powder is continuously added, the pH value of the solution is kept at 8.5, and the buffer solution of the Tris (hydroxymethyl) aminomethane of the MXene-dopamine is obtained.
2. A method for preparing a modified friction power generation sponge according to claim 1, wherein the friction power generation sponge is soaked and modified by a buffer solution of the trimethylol aminomethane of the MXene-dopamine, and the MXene and the surface of a sponge frame are polymerized under the action of the buffer solution of the dopamine.
3. A single electrode sponge friction power generation device is characterized in that: a power generation device comprising the modified friction power generation sponge of claim 1.
4. A single electrode sponge friction generating device as defined in claim 3, wherein: the modified friction power generation sponge is used as a friction material, a Cu conductive adhesive tape is stuck on the back surface of the friction power generation sponge, the friction power generation sponge is fixed on a supporting plate, and a Cu connecting wire outputs current.
5. Use of the single electrode sponge friction generating device according to claim 4, characterized in that: the single-electrode sponge friction power generation device is applied to energy collection and sea wave monitoring.
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| CN114989496A (en) * | 2022-05-12 | 2022-09-02 | 华南师范大学 | MXene/polydopamine composite material and preparation method and application thereof |
| WO2022242256A1 (en) * | 2021-05-17 | 2022-11-24 | 江南大学 | Light-weight porous mxene-based composite thin film electromagnetic shielding material and preparation method therefor |
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| CN112397217A (en) * | 2019-08-13 | 2021-02-23 | 波音公司 | Conductive composite material |
| WO2022242256A1 (en) * | 2021-05-17 | 2022-11-24 | 江南大学 | Light-weight porous mxene-based composite thin film electromagnetic shielding material and preparation method therefor |
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