CN109611298B - Optical drive floating and diving movement device based on bubbles - Google Patents
Optical drive floating and diving movement device based on bubbles Download PDFInfo
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- CN109611298B CN109611298B CN201811550791.XA CN201811550791A CN109611298B CN 109611298 B CN109611298 B CN 109611298B CN 201811550791 A CN201811550791 A CN 201811550791A CN 109611298 B CN109611298 B CN 109611298B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/005—Electro-chemical actuators; Actuators having a material for absorbing or desorbing gas, e.g. a metal hydride; Actuators using the difference in osmotic pressure between fluids; Actuators with elements stretchable when contacted with liquid rich in ions, with UV light, with a salt solution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
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Abstract
The invention relates to a bubble-based optical drive float-submerge movement device, which comprises a float-submerge movement main body formed by compounding a photo-thermal conversion material with efficient electromagnetic wave absorption characteristic and a matrix material, wherein a micro-nano structure capable of binding a layer of micro-bubbles is processed on the surface of the photo-thermal conversion material part of the float-submerge movement main body. Compared with the prior art, the invention realizes the driving of the thermal bubble based on the photothermal effect, converts the light energy into the self kinetic energy, realizes the controllable motion under the illumination condition, simplifies the design of the moving body in the liquid, develops a new method for driving the object in the liquid, can move in various liquids, including water and other organic liquid, and has wide application prospect.
Description
Technical Field
The invention belongs to the technical field of novel driving of functional materials, and relates to a bubble-based optical drive floating and submerging movement device.
Background
The research on the driving mode in the liquid has wide application prospect, and can be used for pushing the motion of an object in the liquid; combined with photocatalytic material, such as titanium dioxide, etc., for degrading pollutants in water and purifying water source, etc. The existing driving method of the floating and submerging movement is mainly driven by gas released by chemical reaction. However, during the exercise, the chemicals required for the chemical reaction, such as hydrogen peroxide, magnesium, calcium carbonate, etc., are gradually consumed as the exercise progresses. The use of a kinetic process based on the release of gases by chemical reactions is not sustainable. In addition, it is difficult to exercise effective control during exercise through the actuation of chemical reactions. Chemicals also limit the practical application of such drivers in other environments.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a bubble-based optical disc drive floating and submerging apparatus.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a CD-ROM drive floats latent movement device based on bubble, includes by having the high-efficient electromagnetic wave absorption characteristic light and heat conversion material and the compound superficial latent movement main part that forms of matrix material, the micro-nano structure that can tie a layer microbubble has still been processed on the surface of the light and heat conversion material part of superficial latent movement main part.
Furthermore, the surface of the photothermal conversion material is subjected to super-hydrophobic treatment, so that when the optical drive float-submerge movement device is immersed in the liquid to be moved, the surface of the part of the photothermal conversion material with the micro-nano structure cannot be completely wetted by the liquid to be moved.
Further, the photothermal conversion material comprises metal, non-metal inorganic particles or composite materials thereof which do not react with the liquid to be moved and have high-efficiency electromagnetic wave absorption characteristics;
the matrix material comprises metal, inorganic nonmetal or organic polymer which does not react with the liquid to be moved.
Further, the composite degree of the photothermal conversion material and the matrix material just meets the following requirements: under the condition of not being illuminated, the density of the floating and submerging motion main body is higher than that of the liquid to be moved, and the floating and submerging motion main body can just sink in the liquid to be moved.
Further, the micro-nano structure is a micro-nano scale hole, cylinder, cone, sheet structure or spherical structure which ensures that the surface of the micro-nano structure is not wetted by the liquid to be moved.
Further, the incident electromagnetic waves that are captured by the photothermal conversion material and undergo photothermal conversion include fixed-wavelength laser waves, ultraviolet light waves, visible light waves, infrared light waves, or microwaves.
Furthermore, the incident electromagnetic wave is absorbed by the photothermal conversion material by intrinsic absorption and plasmon resonance effect absorption.
Further, when the photothermal conversion material absorbs the incident electromagnetic wave to heat and float, the micro-bubbles on the surface of the photothermal conversion material remain attached to the surface.
The working principle of the invention is as follows:
a photothermal conversion material having a high-efficiency electromagnetic wave absorption characteristic is used in combination with a base material for capturing incident electromagnetic waves and converting them into heat. Meanwhile, the surface of the micro-nano structure is processed into a special micro-nano structure, so that a layer of micro bubbles can be bound on the surface of the micro-nano structure when the micro-nano structure is immersed in liquid. The whole density of the liquid-permeable porous material is adjusted to be slightly larger than that of the liquid, and the liquid-permeable porous material gradually sinks in the liquid but cannot wet the surface of the liquid. Incident light is absorbed by electromagnetic wave absorbing particles (i.e., the photothermal conversion material) and converted into heat to heat the air on the surface and inside the material. The bubbles attached to the surface gradually expand, become larger in volume, and do not detach from the surface. As the bubbles expand, the buoyancy force on the object increases, driving the object to move upwards. After the illumination is removed, the heat is gradually dissipated into the surrounding liquid, the bubbles are cooled, the volume is reduced, and the buoyancy of the object is reduced. Under the action of gravity, the object moves downward. In the whole movement process, the bubbles are not separated, and similar floating and submerging movements can be repeated for a plurality of times.
Compared with the prior art, the invention has the following advantages:
(1) the light energy is efficiently converted into heat by the photo-thermal conversion material, and the movement of the object is controlled by the expansion and contraction of the bubbles. The bubbles do not break free from the surface constraints during the entire movement. Thus, the motion process can be continuously and circularly performed. The conversion of light energy to kinetic energy is realized.
(2) The intrinsic absorption or the plasmon resonance effect is used for absorbing light energy, and the photothermal conversion efficiency is improved.
(3) The light energy used by the drive is clean and pollution-free, and has the functions of energy conservation and emission reduction.
(4) The presence of the ultralyophobic surface ensures that many small bubbles can adhere when immersed in the liquid.
(5) The motion of the object can be effectively controlled using lower intensity illumination.
(6) The invention can realize the movement in various liquids through the surface microstructure design and chemical modification, and has wide application value in the fields of drug transportation and release, sewage purification, energy conversion and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a scanning electron microscope photograph of a main body of a snorkeling motion;
FIG. 3 is a diagram showing the variation of the height of the optical drive floating and diving motion device in water with time.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Referring to fig. 1, the bubble-based optical drive float-submerge motion device includes a float-submerge motion main body formed by compounding a photothermal conversion material 1 with a high-efficiency electromagnetic wave absorption characteristic and a base material 2, and a micro-nano structure capable of binding a layer of micro-bubbles is further processed on the surface of the photothermal conversion material part of the float-submerge motion main body.
In a preferred embodiment of the present invention, the surface of the photothermal conversion material is further treated to be super-hydrophobic, so that when the optical drive submergence and floatation movement device is immersed in the liquid to be moved, the surface of the part of the photothermal conversion material having the micro-nano structure is not completely wetted by the liquid to be moved.
Further, the photothermal conversion material comprises metal, non-metal inorganic particles or composite materials thereof which do not react with the liquid to be moved and have high-efficiency electromagnetic wave absorption characteristics;
the matrix material comprises metal, inorganic nonmetal or organic polymer which does not react with the liquid to be moved.
Further, the composite degree of the photothermal conversion material and the matrix material just meets the following requirements: under the condition of not being illuminated, the density of the floating and submerging motion main body is higher than that of the liquid to be moved, and the floating and submerging motion main body can just sink in the liquid to be moved.
Further, the micro-nano structure is a micro-nano scale hole, cylinder, cone, sheet structure or spherical structure which ensures that the surface of the micro-nano structure is not wetted by the liquid to be moved.
Further, the incident electromagnetic waves that are captured by the photothermal conversion material and undergo photothermal conversion include fixed-wavelength laser waves, ultraviolet light waves, visible light waves, infrared light waves, or microwaves.
Furthermore, the incident electromagnetic wave is absorbed by the photothermal conversion material by intrinsic absorption and plasmon resonance effect absorption.
Further, when the photothermal conversion material absorbs the incident electromagnetic wave to heat and float, the micro-bubbles on the surface of the photothermal conversion material remain attached to the surface.
Further, the surface treatment method includes a mask lithography method, a chemical modification, a chemical or physical adsorption method including a conventional immersion, spray coating, physical vapor deposition, or a template method, and the like.
In the following examples, unless otherwise specified, all the materials and techniques used are the means commonly used by those skilled in the art.
Example 1
(1) Mixing the sodium chloride particles, the carbon black particles and the liquid PDMS (the mixture of the three can be prepared according to actual requirements, the general mass ratio is 606:1:100), then pouring the mixture into a mould, and putting the mould into an oven to solidify the mixture. Then, the membrane is soaked in water, and sodium chloride particles in the PDMS are continuously dissolved in the water through continuous extrusion, so that small holes with the same size are reserved in corresponding positions. After the sodium chloride particles are completely dissolved, the solution is placed in an oven to be dried to obtain porous PDMS, and the surface structure of the porous PDMS is shown in FIG. 2, so that countless micro-nano-sized holes are formed on the surface of the porous PDMS.
(2) The porous PDMS was cut to the appropriate size. Through measurement and calculation, the iron block is used as a load, so that the density of the iron block is slightly larger than that of water, and the iron block can just submerge into the water.
(3) Porous PDMS with iron blocks as load was placed in water and gradually dropped to the bottom of the water. Meanwhile, a layer of tiny bubbles can be observed on the surface of the porous PDMS. Using a xenon lamp as the light source, when light is shone on to its surface, the carbon black absorbs and converts the light energy into heat energy and the porous PDMS temperature rises. The bubbles on the surface gradually expand, and as the volume of the bubbles increases, the buoyancy overcomes the gravity to promote the porous PDMS to move upwards. After the illumination is removed, the heat of the porous PDMS is gradually transferred to the surrounding cold water, the temperature is reduced, the bubbles shrink, the volume is reduced, and the buoyancy of the object is reduced. Under the action of gravity, the porous PDMS moves downward. In the whole movement process, the bubbles are not separated, and similar floating and submerging movements can be repeated for a plurality of times.
The height change of the porous PDMS in the embodiment is shown in fig. 3, and it can be seen that the up-and-down latent movement of the porous PDMS in water can be effectively controlled by controlling the illumination condition.
Example 2
In this embodiment, the substance having electromagnetic wave absorption characteristics is a gold nanoparticle; porous PDMS was made using sodium chloride particles and PDMS using the methods in the examples. And then soaking the porous PDMS in 0.5% (m/v) chloroauric acid ethanol solution or dripping 0.5% (m/v) chloroauric acid ethanol solution on the porous PDMS, wherein the chloroauric acid can be reduced by residual curing agent in the PDMS, so that the gold nanoparticles can be synthesized in the porous PDMS after standing for a period of time at room temperature. 532nm laser was used as the light source driver. The rest is the same as example 1.
Example 3
Metal foam is directly used as the base material. The copper foam was placed at 0.065M K2S2O8And 2.5M KOH, and added at 60 deg.CAnd heating for 30min, and carrying out chemical reaction on the surface to form a certain microstructure. And then adhering the graphene on the surface of the copper foam through an organic matter to be used as an electromagnetic wave absorption material. The whole was then soaked in a 1.0% (wt%) 1H, 1H, 2H, 2H-Perfluorodecyltriethoxysilane (PFTS) solution in ethanol, reacted at room temperature for 30min, and then the solution was taken out and heated at 80 ℃ for 30min, to make the copper foam surface hydrophobic by the above chemical modification. The rest is the same as in example 1.
Example 4
And processing a specific microstructure on the surface of the silicon wafer by using a mask photoetching method. Then the silicon chip is placed in a joule evaporator ultra-high vacuum chamber so as to deposit a gold film subsequently, the evaporation rate is about 0.02nm/s, after evaporation, the sample is placed in a horizontal tube type resistance furnace quartz chamber, and annealing is carried out under inert atmosphere, so that a layer of nano gold particles with electromagnetic wave absorption property is deposited on the silicon chip. The silicon wafer with deposited gold nanoparticles was subsequently immersed in a volume ratio V (thiol): v (acetone) ═ 1: 49 in an alkyl mercaptan and acetone solution for 3 hours, the surface of the gold nanoparticle presents hydrophobic characteristics through chemical modification. After immersion in water, bubbles adhere to the surface. The buoyancy is changed through illumination heating, and the object is driven to move.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (3)
1. A CD-ROM drive float-submerge movement device based on bubbles is characterized by comprising a float-submerge movement main body formed by compounding a photo-thermal conversion material with efficient electromagnetic wave absorption characteristic and a matrix material, wherein a micro-nano structure capable of binding a layer of micro-bubbles is processed on the surface of the photo-thermal conversion material part of the float-submerge movement main body;
the surface of the photothermal conversion material is also subjected to super-hydrophobic treatment, so that when the optical drive float-submerge movement device is immersed in the liquid to be moved, the surface of the part of the photothermal conversion material with the micro-nano structure cannot be completely wetted by the liquid to be moved;
the photothermal conversion material comprises metal and non-metal inorganic particles or composite materials thereof which do not react with the liquid to be moved and have high-efficiency electromagnetic wave absorption characteristics, and the photothermal conversion material is selected from one of carbon black, nano gold particles or graphene;
the matrix material comprises metal, inorganic nonmetal or organic polymer which does not react with the liquid to be moved;
the micro-nano structure is a micro-nano scale hole, cylinder, cone, sheet structure or spherical structure which ensures that the surface of the micro-nano structure is not wetted by the liquid to be moved;
incident electromagnetic waves which are captured by the photothermal conversion material and undergo photothermal conversion include fixed-wavelength laser waves, ultraviolet light waves, visible light waves, infrared light waves or microwaves;
when the photothermal conversion material absorbs incident electromagnetic waves to heat and float, micro-bubbles on the surface of the photothermal conversion material are kept attached to the surface of the photothermal conversion material.
2. The apparatus of claim 1, wherein the photothermal conversion material and the matrix material are combined to a degree that: under the condition of not being illuminated, the density of the floating and submerging motion main body is higher than that of the liquid to be moved, and the floating and submerging motion main body can just sink in the liquid to be moved.
3. The apparatus of claim 1, wherein the absorption of the incident electromagnetic wave by the photothermal conversion material is intrinsic absorption and plasmon resonance absorption.
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| CN201811550791.XA CN109611298B (en) | 2018-12-18 | 2018-12-18 | Optical drive floating and diving movement device based on bubbles |
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| CN109958487B (en) * | 2019-03-13 | 2024-05-28 | 华北电力大学 | Steam-driven liquid column piston type movement actuator based on photo-thermal effect |
| CN110152580B (en) * | 2019-05-28 | 2021-04-20 | 内蒙古工业大学 | Method for controlling liquid metal movement in ionic liquid by using laser |
| CN113694974B (en) * | 2021-08-24 | 2023-02-28 | 重庆大学 | Photo-thermal induced bubble assisted device for moving liquid drops on solid surface and using method |
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| CN107805488A (en) * | 2017-10-24 | 2018-03-16 | 上海交通大学 | A kind of bubble controllable driving device and method based on photo-thermal effect |
| CN108996511A (en) * | 2018-06-29 | 2018-12-14 | 湖北大学 | A method of automatic circulating floating dive campaign in water is realized based on super-hydrophobic and superslide surface bubble trap device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107805488A (en) * | 2017-10-24 | 2018-03-16 | 上海交通大学 | A kind of bubble controllable driving device and method based on photo-thermal effect |
| CN108996511A (en) * | 2018-06-29 | 2018-12-14 | 湖北大学 | A method of automatic circulating floating dive campaign in water is realized based on super-hydrophobic and superslide surface bubble trap device |
Non-Patent Citations (1)
| Title |
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| 智能器件的垂直可控运动及在能量转换方面的研究;宋萌萌;《中国博士学位论文全文数据库工程科技Ⅱ辑》;20180215;第59,79-86页 * |
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