CN115156528A - Protective shell structure for preventing metal gallium drop fusion and preparation method and application method thereof - Google Patents
Protective shell structure for preventing metal gallium drop fusion and preparation method and application method thereof Download PDFInfo
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- CN115156528A CN115156528A CN202210606850.0A CN202210606850A CN115156528A CN 115156528 A CN115156528 A CN 115156528A CN 202210606850 A CN202210606850 A CN 202210606850A CN 115156528 A CN115156528 A CN 115156528A
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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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Abstract
The invention belongs to the field of functional materials, and particularly relates to a protective shell structure for preventing metal gallium drops from fusing, and a preparation method and an application method thereof. The protective shell layer structure comprises a polyethylene sheet and a copper foil sheet bonded with the polyethylene sheet, wherein the ratio of the circumscribed circle diameter of the copper foil sheet to the circumscribed circle diameter of the polyethylene sheet is (1). The invention is inspired by hydrophilic-hydrophobic soap molecules, utilizes the characteristic that copper and gallium alloy is rapidly formed on the surface of copper and gallium by normal temperature contact to generate strong adhesion and polyethylene and gallium are not wetted, designs a protective shell structure of copper foil and polyethylene, and can effectively avoid polymerization between liquid metal gallium drops in acid/alkaline solution.
Description
Technical Field
The invention belongs to the field of functional materials, relates to the technical field of robots, and particularly relates to a protective shell structure for preventing metal gallium drops from being fused as well as a preparation method and an application method thereof.
Background
In recent years, gallium and its alloys have been widely used as a low-toxicity liquid metal material at room temperature in the fields of flexible robots, flexible electronic devices, etc. due to their excellent fluidity, variable surface tension, and extremely high electrical and thermal conductivities. At present, researchers have realized that gallium metal drops are pushed to move rapidly in solution and the direction of the gallium metal drops is controlled in the modes of an electric field, metal aluminum and the like under different acid/alkali solution environments. However, in the above system, the metal gallium drops must be isolated because when different metal gallium drops approach each other, the metal gallium drops will rapidly merge to form larger drops due to the extreme interatomic attraction of the metal gallium. At present, in a solution system, research on inhibition of metal gallium droplet polymerization is limited to micro-nano scale, and the adopted method mainly focuses on adhesion of organic layers such as polydopamine, polyethylene glycol (5-20 kDa) and the like. The organic materials adhered to the surface of the micro-nano metal gallium particles isolate gallium from a solution, the conductivity of the gallium is seriously influenced, and gallium liquid drops are difficult to drive in an ionic solution environment.
Disclosure of Invention
In order to solve one of the above technical problems or problems, the present invention provides a protective shell structure for preventing gallium metal drops from fusing, comprising a polyethylene sheet and a copper foil adhered to the polyethylene sheet, wherein the ratio of the circumscribed circle diameter of the copper foil to the circumscribed circle diameter of the polyethylene sheet is 1.
The invention also provides a preparation method of the protective shell structure for preventing the metal gallium from being fused, which comprises the following steps:
a. preparing a copper foil sheet and a polyethylene sheet: respectively cutting the polyethylene sheet and the copper foil sheet into required specifications;
b. cleaning a copper foil sheet and a polyethylene sheet: soaking the copper foil in analytically pure acetone at normal temperature for 3-5min; soaking polyethylene sheet in analytically pure ethanol at normal temperature for 3-5min; placing the soaked copper foil sheet and polyethylene sheet into an ultrasonic container filled with deionized water, cleaning for 1-2min, blowing dry the silicon wafer with clean surface with nitrogen, and storing in a dryer;
c. preparing a copper foil @ polyethylene protective shell layer structure: bonding the copper foil sheet and the polyethylene sheet in the step b by using acrylic glue; the copper foil is adhered to the central position of the polyethylene sheet;
d. and (3) drying: and d, drying the copper foil @ polyethylene protective 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 protective shell structure for preventing the fusion of the metal gallium drops, which comprises the following steps:
e. in an acidic or alkaline solution, selecting a copper foil @ polyethylene protective shell structure with a corresponding specification according to the size of a metal gallium liquid drop, and attaching one surface of the copper foil @ polyethylene protective shell structure, which is provided with a copper foil sheet, to the surface of the metal gallium until most of the surface of the metal gallium is covered by a polyethylene sheet.
The invention is inspired by hydrophilic-hydrophobic soap molecules, utilizes the characteristic that copper and gallium alloy is rapidly formed on the surface of copper and gallium by normal temperature contact to generate strong adhesion and polyethylene and gallium are not wetted, designs a protective shell structure of copper foil and polyethylene, and can effectively avoid polymerization between liquid metal gallium drops in acid/alkaline solution.
Drawings
FIG. 1 is a schematic structural view of the protective shell structure of the present invention.
Fig. 2 is a sectional view of fig. 1.
Fig. 3 is a schematic view showing a state where a metal gallium droplet having a protective shell structure is attached.
FIG. 4 is a graph showing the effect of the electric field driven displacement performance test of the gallium metal droplet with the protective shell structure attached.
Fig. 5 is a graph showing the polymerization performance test effect of the gallium metal droplet with the protective shell structure attached and the gallium metal droplet without the protective shell structure attached.
Detailed Description
The invention will be further explained with reference to the drawings.
Example 1, a protective shell structure for preventing the fusion of gallium metal drops as shown in fig. 1-2, comprising a polyethylene sheet 1 and a copper foil sheet 2 bonded to the polyethylene sheet 1, wherein the ratio of the diameters of the copper foil sheet 2 to the polyethylene sheet 1 is 1 to 10: 2, the ratio of the diameters of the copper foil sheet 2 to the diameters of the polyethylene sheet 1 is 1.
Example 2, example 1 a method of preparing a protective shell structure to prevent the fusion of metallic gallium drops, using steps a to d:
a. preparing a copper foil sheet and a polyethylene sheet: respectively cutting the polyethylene sheet and the copper foil sheet into required specifications;
b. cleaning the copper foil sheet and the polyethylene sheet: soaking the copper foil in analytically pure acetone at normal temperature for 3-5min; soaking polyethylene sheet in analytically pure ethanol at normal temperature for 3-5min; putting the soaked copper foil sheet and polyethylene sheet into an ultrasonic container filled with deionized water, cleaning for 1-2min, drying the silicon wafer with clean surface by using nitrogen, and storing in a dryer;
c. preparing a copper foil @ polyethylene protective shell layer structure: bonding the copper foil sheet and the polyethylene sheet in the step b by using acrylic glue; the copper foil is adhered to the central position of the polyethylene sheet;
d. and (3) drying: and d, drying the copper foil @ polyethylene protective shell structure in the step c for 5-10min under the condition of nitrogen atmosphere, and storing the dried sample in a dryer.
Example 3, a method of applying a protective shell structure for preventing the fusion of metallic gallium drops, as shown in fig. 3, comprises the steps of:
e. in an acidic or alkaline solution, selecting a copper foil @ polyethylene protective shell structure with a corresponding specification according to the size of a metal gallium liquid drop, and attaching one surface of the copper foil @ polyethylene protective shell structure, which is provided with a copper foil sheet, to the surface of the metal gallium until most of the surface of the metal gallium is covered by a polyethylene sheet. The acid 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.
As shown in FIG. 4, the metal gallium drops attached with the copper foil @ polyethylene protective shell layer structure can move at the fastest speed of about 0.75cm/s under the driving of an electric field of 5-10V with the distance between electrodes of 4.5 cm.
As shown in fig. 5, in an acidic/alkaline solution, a metal gallium droplet with a copper foil @ polyethylene protective shell structure on the surface and a metal gallium droplet without a protective shell structure are pressed together and approached by a uniform compression mode of 10-30cm/min, and it is found that the copper foil @ polyethylene protective shell can inhibit the fusion of the gallium droplets when the deformation of the gallium droplets is 18.3-47.4%.
The invention provides a new effective technical means for inhibiting the polymerization of the metal gallium drops and provides a new idea for the development and industrial application of related devices. The preparation method of the copper foil @ polyethylene protective shell structure is simple in equipment requirement, easy to operate, large in range, good in controllability, good in reproducibility, free of special condition requirement, easy to operate, simple in equipment requirement and low in cost, so that the preparation method is particularly suitable for commercial large-scale production.
Claims (6)
1. The utility model provides a prevent that metal gallium drips protection shell structure that fuses which characterized in that, includes polyethylene sheet (1) and bonds copper foil piece (2) together with polyethylene sheet (1), the circumscribed circle diameter ratio of copper foil piece (2) and polyethylene sheet (1) is 1 to 1.
2. A protective shell structure against the coalescence of metallic gallium drops according to claim 1, characterized in that the polyethylene sheet (1) is a disc with a thickness of 0.075mm and a diameter of 0.3-1.0cm, and the copper foil sheet (2) is a disc with a thickness of 0.05mm and a diameter of 0.1-0.5cm, which are arranged concentrically.
3. A method for preparing a protective shell structure for preventing the fusion of metallic gallium drops as recited in claim 1 or 2, comprising the steps of:
a. preparing a copper foil sheet and a polyethylene sheet: respectively cutting the polyethylene sheet and the copper foil sheet into required specifications;
b. cleaning a copper foil sheet and a polyethylene sheet: soaking the copper foil in analytically pure acetone at normal temperature for 3-5min; soaking polyethylene sheet in analytically pure ethanol at normal temperature for 3-5min; placing the soaked copper foil sheet and polyethylene sheet into an ultrasonic container filled with deionized water, cleaning for 1-2min, blowing dry the silicon wafer with clean surface with nitrogen, and storing in a dryer;
c. preparing a copper foil @ polyethylene protective shell layer structure: bonding the copper foil sheet and the polyethylene sheet in the step b by using acrylic glue; the copper foil is adhered to the central position of the polyethylene sheet;
d. and (3) drying: and d, drying the copper foil @ polyethylene protective shell structure in the step c for 5-10min under the condition of nitrogen atmosphere, and storing the dried sample in a dryer.
4. A method of using a protective shell structure for preventing the coalescence of metallic gallium drops as defined in claim 1 or 2, comprising the steps of:
e. in an acidic or alkaline solution, selecting a copper foil @ polyethylene protective shell structure with a corresponding specification according to the size of a metal gallium liquid drop, and attaching one surface of the copper foil @ polyethylene protective shell structure, which is provided with a copper foil sheet, to the surface of the metal gallium until most of the surface of the metal gallium is covered by a polyethylene sheet.
5. The method for using a protective shell structure to prevent gallium metal drop fusion as claimed in claim 4, wherein said acidic solution is 0.4-1.0 mol/L hydrochloric acid aqueous solution, and said alkaline solution is 0.005-0.01mol/L sodium hydroxide aqueous solution.
6. The method for applying a protective shell structure for preventing the fusion of metallic gallium drops as claimed in claim 4, wherein the diameter of the polyethylene sheet and the diameter of the metallic gallium drops are controlled to be between 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210606850.0A CN115156528B (en) | 2022-05-31 | 2022-05-31 | Protective shell structure for preventing metal gallium drops from fusion and preparation method and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210606850.0A CN115156528B (en) | 2022-05-31 | 2022-05-31 | Protective shell structure for preventing metal gallium drops from fusion and preparation method and application method thereof |
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| CN115156528A true CN115156528A (en) | 2022-10-11 |
| CN115156528B CN115156528B (en) | 2023-08-22 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US9682533B1 (en) * | 2014-09-09 | 2017-06-20 | Hrl Laboratories, Llc | Methods to form electrical-mechanical connections between two surfaces, and systems and compositions suitable for such methods |
| US20180233482A1 (en) * | 2017-02-14 | 2018-08-16 | International Business Machines Corporation | Gallium liquid metal embrittlement for device rework |
| US20180352654A1 (en) * | 2017-05-31 | 2018-12-06 | Microsoft Technology Licensing, Llc | Gallium-containing anisotropically conductive film |
| CN111385978A (en) * | 2018-12-29 | 2020-07-07 | 北京梦之墨科技有限公司 | Double-layer circuit and manufacturing method thereof |
| US20210145967A1 (en) * | 2019-11-14 | 2021-05-20 | Royal Melbourne Institute Of Technology | Magnetic liquid particles |
-
2022
- 2022-05-31 CN CN202210606850.0A patent/CN115156528B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9682533B1 (en) * | 2014-09-09 | 2017-06-20 | Hrl Laboratories, Llc | Methods to form electrical-mechanical connections between two surfaces, and systems and compositions suitable for such methods |
| 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 |
| US20180233482A1 (en) * | 2017-02-14 | 2018-08-16 | International Business Machines Corporation | Gallium liquid metal embrittlement for device rework |
| US20180352654A1 (en) * | 2017-05-31 | 2018-12-06 | Microsoft Technology Licensing, Llc | Gallium-containing anisotropically conductive film |
| CN111385978A (en) * | 2018-12-29 | 2020-07-07 | 北京梦之墨科技有限公司 | Double-layer circuit and manufacturing method thereof |
| US20210145967A1 (en) * | 2019-11-14 | 2021-05-20 | Royal Melbourne Institute Of Technology | Magnetic liquid particles |
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