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Liquid dropping device used for measuring static contact angle

A static contact angle and liquid drop technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem that the measurement of static hydrophobic angle cannot be satisfied, the droplet volume cannot be accurately controlled, and the droplet volume control and droplet volume cannot be satisfied at the same time. Shape falling speed and other issues

Inactive Publication Date: 2013-12-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the existing dripping devices, the rubber dropper is a relatively common and practical instrument, but it cannot accurately control the droplet volume, so it cannot meet the requirements of measuring the static hydrophobic angle, and other simple instruments cannot simultaneously meet the droplet volume control , Droplet shape, drop speed requirements

Method used

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  • Liquid dropping device used for measuring static contact angle
  • Liquid dropping device used for measuring static contact angle

Examples

Experimental program
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Embodiment

[0021] Such as figure 1 , figure 2 As shown, a dripping device for measuring the static contact angle includes a needle 7, a piston rod 1, a rubber head 8, and a drip syringe 3. The rubber head 8 is installed at the lower end of the piston rod 1 and is located in the drip syringe. 3, it also includes a piston movement nut 2 and a syringe movement nut 4, the piston rod 1 and the outer wall of the drip syringe 3 are threaded, the piston movement nut 2 is installed on the piston rod 1, and the syringe movement Nut 4 is installed in the middle and upper end of drip syringe 3.

[0022] The piston rod 1 is not in contact with the inner wall of the drip syringe 3, and the rubber head 8 is in sealing contact with the inner wall of the drip syringe 3, moves up and down in the drip syringe 3, and sucks in or squeezes out the liquid.

[0023] The top of the drip syringe 3 is provided with a dial, which is integrated with the drip syringe, and the two cannot move relative to each other...

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PUM

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Abstract

The invention discloses a liquid dropping device used for measuring a static contact angle. The liquid dropping device comprises a pin head, a piston rod, a rubber head and a water dropping needle cylinder, wherein the rubber head is arranged at the lower end of the piston rod, is located inside the water dropping needle cylinder, and is in sealing contact with the water dropping needle cylinder; the liquid dropping device further comprises a piston movement nut and a needle cylinder movement nut, wherein threads are arranged on the outer wall of each of the piston rod and the water dropping needle cylinder; the piston movement nut is arranged on the piston rod; the needle cylinder movement nut is arranged at the middle upper end of the water dropping needle cylinder. The water dropping device disclosed by the invention can be used for precisely controlling the liquid drop volume within a certain range, and also can be used for ensuring the naturally-formed complete shapes of the water drops, so that interference of impact of dropping water drops to liquid drop shapes is avoided.

Description

technical field [0001] The invention relates to the field of dripping, in particular to a dripping device for measuring static contact angles. Background technique [0002] According to authoritative scholars and related experimental results, the volume of the droplet affects the size of the static contact angle. If the droplet volume is too large, the static contact angle will decrease; if the droplet volume is too small, the static contact angle will increase. When the droplet volume is stable in a certain range, the static contact angle remains basically unchanged. According to the DL / T864-2004 international standard, the volume of water droplets used for static hydrophobic angle measurement should be 4-7 μL. In domestic and foreign experimental operations, the actual selection of volume standards varies. Some domestic researches choose larger than 5-6 μL, Braunschweig Technical University in Germany uses 30 μL, and surface and interface researchers generally use 2-5 μL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
Inventor 邓诗雨雷乾吴奇珂叶志健刘刚
Owner SOUTH CHINA UNIV OF TECH
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