CN115121795B - Shell structure capable of driving gallium drops to move and preparation method and application method thereof - Google Patents
Shell structure capable of driving gallium drops to move and preparation method and application method thereof Download PDFInfo
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- CN115121795B CN115121795B CN202210606151.6A CN202210606151A CN115121795B CN 115121795 B CN115121795 B CN 115121795B CN 202210606151 A CN202210606151 A CN 202210606151A CN 115121795 B CN115121795 B CN 115121795B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to the field of functional materials, in particular to a shell structure capable of driving gallium drops to move, a preparation method and an application method thereof, wherein the shell structure comprises a foam nickel sheet and a copper foil bonded with the foam nickel sheet, and the ratio of the external diameters of the copper foil and the foam nickel sheet is 1:1-1:2. Compared with the prior art, the copper foil@foamed nickel shell structure is designed for liquid gallium by utilizing the characteristic that copper and gallium alloy are rapidly formed by normal temperature contact of copper and gallium to generate strong adhesion and foamed nickel and gallium are not infiltrated, the structure has very obvious response to a static magnetic field, and the movement of gallium liquid drops can be driven by the static magnetic field. Meanwhile, the inner side of the structure has strong adhesion with the surface of the liquid gallium, but the outer side is completely non-infiltrated with the gallium, so that the polymerization of the liquid gallium drops in an acid/alkali solution can be effectively avoided.
Description
Technical Field
The invention relates to the field of functional materials or the technical field of robots, in particular to a shell structure capable of driving gallium drops to move, and a preparation method and an application method thereof.
Background
Under the room temperature condition, the gallium metal and the room temperature alloy thereof have excellent fluidity, variable surface tension, extremely high electrical conductivity and heat conductivity, low toxicity and wide application in the fields of flexible robots, flexible electronic devices and the like. In recent years, researchers have found that electric fields, metallic aluminum reacts with solutions inside gallium, and the like, to effectively drive movement of metallic gallium. However, since gallium is not magnetic, it is difficult for a static magnetic field to drive the movement of gallium. Some researchers have added micron-sized powders such as Fe and Ni to the inside of gallium metal, and the movement of gallium droplets is driven by the magnetism of these powders. However, micron-sized powders such as Fe and Ni significantly affect the fluidity of gallium metal and are difficult to separate from gallium liquid. Meanwhile, in the above-mentioned research system, the gallium metal droplets must be isolated because when different gallium metal droplets are close, the gallium metal droplets are rapidly fused to form larger droplets due to the great interatomic attraction of gallium metal. Currently, in solution systems, studies on inhibition of gallium metal droplet polymerization are limited to micro-nano scale, and the methods adopted are mainly focused on adhesion of organic layers such as polydopamine, polyethylene glycol (5-20 kDa), and the like. These organic materials adhered to the surface of micro-nano metallic gallium particles are not magnetic, making gallium drops difficult to drive by magnetic fields.
Disclosure of Invention
In order to solve the technical problems or one of the technical problems, the invention provides a shell structure capable of driving gallium drops to move, which is different from the prior art in that the shell structure comprises a foam nickel sheet and a copper foil bonded with the foam nickel sheet, wherein the ratio of the external diameters of the copper foil and the foam nickel sheet is 1:1 to 1:2.
The invention also provides a preparation method of the shell structure capable of driving the gallium drops to move, which comprises the following steps:
a. copper foil and foam nickel sheet preparation: cutting the foam nickel sheet and the copper foil sheet into required specifications respectively;
b. cleaning copper foil and foam nickel sheet: soaking the copper foil in analytically pure acetone for 3-5min at normal temperature; soaking the foam nickel sheet in analytically pure ethanol for 3-5min at normal temperature; placing the soaked copper foil and the foam nickel sheet into an ultrasonic container filled with deionized water, cleaning for 1-2min, drying the silicon wafer with the clean surface by nitrogen, and storing in a dryer;
c. preparing a copper foil @ foam nickel shell structure: bonding the copper foil sheet and the foam nickel sheet in the step b by using acrylic glue; the copper foil is adhered to the center of the foam nickel sheet;
d. and (3) drying: and c, drying the copper foil@foamed nickel shell structure in the step c for 5-10min under the condition of nitrogen atmosphere, and storing the dried sample in a dryer.
The invention also provides an application method of the shell structure capable of driving the gallium drops to move, which comprises the following steps:
e. and in an acidic or alkaline solution, selecting a copper foil@nickel foam shell structure with corresponding specification according to the size of the gallium drops, and attaching one surface of the copper foil@nickel foam shell structure with a copper foil to the surface of the gallium until most of the surface of the gallium is covered by a nickel foam sheet.
Compared with the prior art, the copper foil@foamed nickel shell structure is designed for liquid gallium by utilizing the characteristic that copper and gallium alloy are rapidly formed by normal temperature contact of copper and gallium to generate strong adhesion and foamed nickel and gallium are not infiltrated, the structure has very obvious response to a static magnetic field, and the movement of gallium liquid drops can be driven by the static magnetic field. Meanwhile, the inner side of the structure has strong adhesion with the surface of the liquid gallium, but the outer side is completely non-infiltrated with the gallium, so that the polymerization of the liquid gallium drops in an acid/alkali solution can be effectively avoided.
Drawings
FIG. 1 is a schematic structural view of a shell structure of the present invention.
Fig. 2 is a cross-sectional view of fig. 1.
Fig. 3 is a schematic view showing a state of gallium metal droplets having a shell structure attached thereto.
Fig. 4 is a graph showing the effect of the gallium metal droplet having a shell structure attached thereto on driving displacement in a static magnetic field.
In the figure, the square below the glass dish and held by hand is a magnet.
Fig. 5 is a graph showing the effect of testing the polymerization performance of gallium drops with and without a shell structure attached thereto.
Detailed Description
Examples 1 to 3
The preparation method of the steps a to e is adopted, aiming at gallium drops with the diameter of 0.5cm, the copper foil@foam nickel shell layer measured in the step f can inhibit fusion among gallium drops with the deformation of 40.5-60.7%, and the fusion is shown in the following table:
and c, adopting the preparation methods in the steps a to e, and measuring the driving capability of the copper foil@foamed nickel structure attached to the surface to gallium drops in 0.4mol/L solution under the attraction of a rubidium magnet, wherein the driving capability is shown in the following table:
a. preparing copper foil and foam nickel sheet: firstly, cutting a copper foil with the purity of 99.9% and the thickness of 0.05mm into squares with the length of 3mm and the width of 3mm, and cutting nickel foam with the thickness of 0.05mm into squares with the length of 3mm and the width of 3 mm;
b. cleaning copper foil and foam nickel: firstly, soaking copper foil and foam nickel in analytically pure acetone for 3-5min at normal temperature, putting the soaked copper foil and the soaked copper foil into an ultrasonic container filled with deionized water, and cleaning for 1-2min. Drying the silicon wafer with the clean surface by nitrogen, and storing the silicon wafer in a dryer;
c. preparing a copper foil @ foam nickel protective shell structure: and c, bonding the copper foil and the foam nickel in the step b by using 0.01-0.05 mu l of acrylic glue through a plane bonding means. Wherein a copper foil is adhered to the central position of the foam nickel, and the diameter of the copper foil and the diameter of the foam nickel are controlled to be between 1:1 and 1:2.
d. And (3) drying: c, drying the copper foil@foamed nickel protective shell structure in the step c for 5-10min under the condition of nitrogen atmosphere, and storing the dried sample in a dryer;
e. application of copper foil @ foam nickel protective shell structure: in an acidic or alkaline solution, selecting a copper foil@foamed nickel protective shell structure with proper size according to the size of the gallium metal liquid drops, wherein the diameter of the foamed nickel is controlled to be between 1:10 and 1:5 compared with the gallium metal liquid drops. The copper foil face was applied to the gallium metal surface until the gallium metal surface was mostly covered with foam nickel, as shown in fig. 3.
As shown in fig. 4, in the acidic or alkaline solution, metallic gallium droplets of a copper foil @ foam nickel protective shell structure are attached to the surface of the petri dish by using a rubidium magnet, and it is obvious that the metallic gallium droplets are dragged by a static magnetic field.
As shown in figure 5, in an acidic or alkaline solution, the gallium metal liquid drop with a copper foil@foam nickel protective shell structure on the surface is pressed with the gallium metal liquid drop by means of uniform compression at a speed of 10-30 cm/min. It was found that copper foil @ foam nickel protective shells of different sizes can inhibit fusion between gallium drops between 40.5-60.7% of the gallium drop deflection in 0.4mol/L hydrochloric acid solution.
The acidic or alkaline solution in step e, f, g is an aqueous solution consisting of 0.4-1.0 mol/L hydrochloric acid or 0.005-0.01mol/L sodium hydroxide.
The invention not only provides a new effective technical means for inhibiting the polymerization of the gallium drops, but also provides a new thought for the static magnetic field to magnetically drive the movement of the gallium drops. The preparation method of the copper foil and foam nickel protective shell structure has the advantages of simple equipment requirements, easy operation, large range, good controllability, good repeatability, no special condition requirements, easy operation, simple equipment requirements and low cost, thereby being particularly suitable for commercial mass production.
Claims (5)
1. An application method of a shell structure capable of driving gallium drops to move is characterized by comprising the following steps:
a. copper foil and foam nickel sheet preparation: cutting the foam nickel sheet and the copper foil sheet into required specifications respectively;
b. cleaning copper foil and foam nickel sheet: soaking the copper foil in analytically pure acetone for 3-5min at normal temperature; soaking the foam nickel sheet in analytically pure ethanol for 3-5min at normal temperature; placing the soaked copper foil and the foam nickel sheet into an ultrasonic container filled with deionized water, cleaning for 1-2min, drying the sheet with clean surface by nitrogen, and storing in a dryer;
c. preparing a copper foil @ foam nickel shell structure: bonding the copper foil sheet and the foam nickel sheet in the step b by using acrylic glue; the copper foil is adhered to the center of the foam nickel sheet;
d. and (3) drying: c, drying the copper foil@foamed nickel shell structure in the step c for 5-10min under the condition of nitrogen atmosphere, and storing the dried sample in a dryer;
e. selecting a copper foil@foamed nickel shell structure with corresponding specification according to the size of the liquid drops of the metallic gallium in an acidic or alkaline solution, and attaching one surface of the copper foil@foamed nickel shell structure with a copper foil to the surface of the metallic gallium until most of the surface of the metallic gallium is covered by a foamed nickel sheet; the copper foil and the foam nickel shell structure are designed by utilizing the characteristic that copper and gallium alloy are rapidly formed by contacting the copper and the gallium surface at normal temperature to generate strong adhesion and foam nickel and gallium are not infiltrated, and the movement of metal gallium liquid drops can be driven by a static magnetic field.
2. The application method of the shell structure capable of driving gallium drops to move according to claim 1, wherein the ratio of the circumscribed diameters of the copper foil (2) and the foam nickel sheet (1) is 1:1 to 1:2.
3. The application method of the shell structure capable of driving gallium drops to move according to claim 1, wherein the foam nickel sheet (1) is a square sheet with the thickness of 0.05mm and the length of 3mm and the width of 3mm, the copper foil sheet (2) is a square sheet with the purity of 99.9%, the thickness of 0.05mm and the length of 2mm and the width of 2mm, and the copper foil sheet (2) is positioned in the center of the foam nickel sheet (1).
4. The method for applying a shell structure capable of driving gallium drops to move according to claim 1, wherein the acidic solution is 0.4-1.0 mol/L hydrochloric acid aqueous solution, and the alkaline solution is 0.005-0.01mol/L sodium hydroxide aqueous solution.
5. The method of claim 1, wherein the diameter of the circumcircle of the foam nickel sheet is controlled to be 1:10 to 1:5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606151.6A CN115121795B (en) | 2022-05-31 | 2022-05-31 | Shell structure capable of driving gallium drops to move and preparation method and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210606151.6A CN115121795B (en) | 2022-05-31 | 2022-05-31 | Shell structure capable of driving gallium drops to move and preparation method and application method thereof |
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| CN115121795A CN115121795A (en) | 2022-09-30 |
| CN115121795B true CN115121795B (en) | 2023-08-22 |
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| CN202210606151.6A Active CN115121795B (en) | 2022-05-31 | 2022-05-31 | Shell structure capable of driving gallium drops to move and preparation method and application method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1496655A (en) * | 1965-10-14 | 1967-09-29 | Westinghouse Electric Corp | Vacuum type switches using gallium or its alloys as a conductive shunt material |
| CN102562513A (en) * | 2010-12-17 | 2012-07-11 | 中国科学院理化技术研究所 | Convolute accelerating pump used for driving conducting fluid to flow |
| CN105071688A (en) * | 2015-08-28 | 2015-11-18 | 清华大学 | Magnetic control motor based on liquid metal, manufacturing method thereof and application thereof |
| CN106158223A (en) * | 2016-07-21 | 2016-11-23 | 成都博盈复希科技有限公司 | A kind of magnetic liquid metal and preparation method thereof |
| CN108085519A (en) * | 2016-11-21 | 2018-05-29 | 云南科威液态金属谷研发有限公司 | A kind of method and its application that micro-nano granules are adulterated into liquid metal |
| CN108888270A (en) * | 2018-07-19 | 2018-11-27 | 苏州大学 | A kind of guide device for magnetic liquid metal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210145967A1 (en) * | 2019-11-14 | 2021-05-20 | Royal Melbourne Institute Of Technology | Magnetic liquid particles |
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2022
- 2022-05-31 CN CN202210606151.6A patent/CN115121795B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1496655A (en) * | 1965-10-14 | 1967-09-29 | Westinghouse Electric Corp | Vacuum type switches using gallium or its alloys as a conductive shunt material |
| CN102562513A (en) * | 2010-12-17 | 2012-07-11 | 中国科学院理化技术研究所 | Convolute accelerating pump used for driving conducting fluid to flow |
| CN105071688A (en) * | 2015-08-28 | 2015-11-18 | 清华大学 | Magnetic control motor based on liquid metal, manufacturing method thereof and application thereof |
| CN106158223A (en) * | 2016-07-21 | 2016-11-23 | 成都博盈复希科技有限公司 | A kind of magnetic liquid metal and preparation method thereof |
| CN108085519A (en) * | 2016-11-21 | 2018-05-29 | 云南科威液态金属谷研发有限公司 | A kind of method and its application that micro-nano granules are adulterated into liquid metal |
| CN108888270A (en) * | 2018-07-19 | 2018-11-27 | 苏州大学 | A kind of guide device for magnetic liquid metal |
Non-Patent Citations (1)
| Title |
|---|
| 润湿性及磁场对液态金属自由表面膜流流动状态的影响;张秀杰等;核聚变与等离体物理;第37卷(第1期);52-57 * |
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| CN115121795A (en) | 2022-09-30 |
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