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A device for automatically separating water-oil mixed droplets and its separation method

A water-oil mixing and automatic separation technology, which is applied in the fields of electrical liquid separation, chemical instruments and methods, laboratory containers, etc. Simple structure and the effect of improving separation efficiency

Inactive Publication Date: 2019-10-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the single and double substrate structures in the digital microfluidic chip cannot separate the water-oil mixed droplets alone.

Method used

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  • A device for automatically separating water-oil mixed droplets and its separation method
  • A device for automatically separating water-oil mixed droplets and its separation method

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Experimental program
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Effect test

Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] Using digital microfluidic technology, the controller controls the second square electrode 6 to drive the water-oil mixed droplet to the knife-cut surface on the edge of the upper substrate 3. Due to the different wetting properties of water and oil, the oil droplet 8 will automatically enter the In the microfluidic channel composed of upper substrate 3, lower substrate 9 and spacers. The water droplets stay outside the microfluidic channel, and then the controller controls the first square electrode 5 and the second square electrode 6 to drive the oil droplet 8 and the water droplet 7 to the oil droplet and the water droplet collection place respectively, thereby realizing the water-oil droplet automatic separation.

[0021] The side of the upper substrate 3 in contact with the water-oil mixed droplet is provided with an inclined surface to form a kn...

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Abstract

The invention discloses a device for automatically separating a water-oil-mixed drop and a separating method thereof. The device is characterized in that automatic separation of the water-oil-mixed drop is achieved by utilizing the wetting property difference of the water-oil drop, two substrates combined with a single-substrate digital micro-fluidic chip and an electric-field drive method and through the electrode sequence, connected with a controller, in a drive device. The device has the advantages that the device is simple in structure and capable of fast and efficiently separating the microliter-scale and nanoliter-scale water-oil-mixed drop; chemical reagent adding is not needed in the separation process, and additional pollution is avoided; the device is applicable to the separationof various water-based drops and oil drops and wide in application range.

Description

technical field [0001] The invention belongs to the technical field of digital microfluidics, and in particular relates to a device for automatically separating water-oil mixed droplets and a separation method thereof. Background technique [0002] The treatment of oily wastewater has always been a concern of the environmental protection industry. In practice, the method of adding chemical agents is often used, but the application of chemical agents is narrow and the cost is high. At the same time, it will also bring new difficulties to the treatment of the separated discharge liquid. Thereby increasing the difficulty of governance related to environmental pollution. Using physical methods can effectively improve and avoid these deficiencies. [0003] At present, the physical methods used to treat oily wastewater include gravity sedimentation, centrifugal separation, coagulation, electric separation, etc. Some of these methods have the problems of long time consumption, hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01L3/00B01D17/06
Inventor 王伟强朴禹滈
Owner NANJING UNIV OF SCI & TECH