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Method for realizing rapid spontaneous rotation of liquid drops

A spontaneous rotation, droplet technology, applied in chemical instruments and methods, chemical/physics/physicochemical processes, chemical/physical processes, etc., can solve problems such as lack of practicality, effectiveness, and stability, and improve energy conversion efficiency. , to avoid secondary transformation, the effect of large angular velocity

Active Publication Date: 2021-04-02
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Method for realizing rapid spontaneous rotation of liquid drops
  • Method for realizing rapid spontaneous rotation of liquid drops
  • Method for realizing rapid spontaneous rotation of liquid drops

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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Abstract

The invention provides a method for achieving rapid spontaneous rotation of liquid drops. The method comprises the following steps: selecting acid liquid with the pH value ranging from 0.01 to 4.5 andliquid metal in a flowing state; and dripping acid liquid with the volume ranging from 5-500 microliters on the surface of liquid metal at a time through a dropper. A large number of micro-nano bubbles are generated inside the liquid metal after the liquid drops react with the liquid metal, the bubbles emerge under the independent movement and mutual action, the rotating effect is automatically generated inside the liquid drops, and then the liquid drops are driven to spontaneously spin. The method has the characteristics of simplicity, convenience, feasibility, quickness, high angular speed,sustainability, stability in rotation, no need of external driving, specific conditions or devices and the like, and the rotating speed and time of the liquid drops can be regulated and controlled byregulating and controlling the reaction intensity between the liquid drops and the liquid metal or adding a pressure device and a concentrated acid supplementing device. The liquid drops can continuously rotate in a stable shape, so that the rotating shapes of the liquid drops in different motion forms are realized by regulating and controlling parameters or applying a symmetrical 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 Applications(China)
IPC IPC(8): B01J19/00
CPCB01J19/00
Inventor 赵亚溥王占龙王晓荷
Owner INST OF MECHANICS - CHINESE ACAD OF SCI