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A method to achieve rapid and spontaneous rotation of liquid droplets

A technology of spontaneous rotation and liquid droplets, which is applied to laboratory containers, chemical instruments and methods, laboratory utensils, etc., can solve the problems of practicality, effectiveness, and lack of stability, so as to improve energy conversion efficiency and avoid secondary pollution. Transformation times, the effect of large angular velocity

Active Publication Date: 2021-09-21
INST OF MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have major deficiencies in practicality, effectiveness, stability, etc.

Method used

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  • A method to achieve rapid and spontaneous rotation of liquid droplets
  • A method to achieve rapid and spontaneous rotation of liquid droplets
  • A method to achieve rapid and spontaneous rotation of liquid droplets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The liquid metal mixed with 65% gallium and 35% indium is selected in the experiment, and the liquid metal is poured from the storage test tube into the cleaned petri dish. For 8 cm, use dilute sulfuric acid solution for cleaning and wetting, and finally remove dilute sulfuric acid solution.

[0050] Take 15 ml of liquid metal, and when pouring or injecting liquid metal, minimize the entry of liquid metal oxide substances. After the liquid metal is set, the oxide layer on the surface of the liquid metal is removed with a dilute sulfuric acid solution with a pH value of 2.26.

[0051] After completing the above steps, use a dilute sulfuric acid solution with a pH of 1.68 and a volume of 0.1ml to drop it on the surface of the liquid metal with a dropper. The drop position should be selected as the center of the liquid metal as possible to make the droplet rotate better. Such as figure 2 As shown in , the droplet rotates to present a comma or Taiji shape, and it can be ...

Embodiment 2

[0053] Use liquid metal with a composition ratio of 65% gallium and 35% indium, take the liquid metal out of the storage test tube, place it in a plastic petri dish with a diameter of 8 cm, wash the surface of the liquid metal with dilute sulfuric acid, and remove the surface oxide layer of the liquid metal .

[0054] Then, the injection head of the syringe pump that can fix the spatial position is used to drop the dilute sulfuric acid droplets. Syringe pump setting: Micro-nano liquid syringe pump is used, the injection rate is 0.005ml / s, and the spatial position of the injection head is controlled by the mechanical arm, so that the injection head is located 3mm above the liquid metal surface and injected perpendicular to the liquid metal surface .

[0055] Wherein, the droplet adopts a dilute sulfuric acid solution with a pH of 1.21. By continuously injecting different or equal volumes of dilute sulfuric acid solution to the same location, such as Figure 3-Figure 7 As sho...

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PUM

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Abstract

The invention provides a method for realizing rapid spontaneous rotation of droplets, comprising the following steps: selecting an acidic liquid with a pH value of 0.01-4.5 and a liquid metal in a flowing state; The liquid drops on the surface of the liquid metal, and after the droplet reacts with the liquid metal, a large number of micro-nano bubbles are generated inside. A spin occurs. The invention has the characteristics of simplicity, speed, high angular velocity, sustainable and stable rotation, no need for external drive, specific conditions or devices, etc., and can adjust the intensity of the reaction between the droplet and the liquid metal or add a pressure device and concentrated acid. A supplementary device is used to regulate the rotation speed and time of the droplet, and it can continue to rotate in a stable shape, and then the rotation shape of the droplet under different motion forms can be realized by adjusting the parameters or applying a symmetry breaking implementation device.

Description

technical field [0001] The invention relates to the fields of physical chemistry, droplet dynamics, wetting interface and particle motion, in particular to a method for directly converting chemical energy into rotational kinetic energy to realize rapid, stable and spontaneous rotation of droplets. Background technique [0002] The spontaneous movement of droplets plays an important and even critical role in a series of important applications such as microfluidic chips, biochips, biological detection, lab-on-a-chip, and flexible electronic devices. Realizing the spontaneous motion of liquid droplets in a simple and fast way plays an important role in promoting these industrial applications, and the rotation of liquid droplets is an important part of the liquid droplet motion. [0003] The positive and negative spins of particles can carry opposite information, and the extended application of this function in the above application scenarios can be realized by rotating droplets...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/00B01J19/00B01J13/00
CPCB01J19/00
Inventor 赵亚溥王占龙王晓荷
Owner INST OF MECHANICS CHINESE ACAD OF SCI
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