Super-drainage pump for spontaneously transporting tiny water drops through antigravity and preparation method and application of super-drainage pump

An anti-gravity and hydrophobic pump technology, applied in chemical instruments and methods, laboratory containers, laboratory utensils, etc., can solve the problems of restricting the development of devices and complicated preparation work, and achieve low cost, obvious effect, and easy raw materials. The effect

Active Publication Date: 2015-03-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, external propulsion devices such as mechanical pumps can be used to control the flow direction and height of liquid in microfluidic devices, but these methods require external energy sources such as electric fields, and the preparation work is complicated, which limits the development of such devices

Method used

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  • Super-drainage pump for spontaneously transporting tiny water drops through antigravity and preparation method and application of super-drainage pump
  • Super-drainage pump for spontaneously transporting tiny water drops through antigravity and preparation method and application of super-drainage pump
  • Super-drainage pump for spontaneously transporting tiny water drops through antigravity and preparation method and application of super-drainage pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Soak a commercial 50-mesh copper mesh (with a maximum pore size of about 500 microns) in 4M hydrochloric acid for 10 minutes, then soak the copper mesh in 1M sodium hydroxide and 0.13M ammonium persulfate for 5 minutes, wash and dry. Utilize the ethanol solution of 1mM dodecyl mercaptan to soak after 2 hours, utilize ethanol to rinse clean, dry to obtain superhydrophobic macroporous mesh material 2, namely superhydrophobic copper mesh, such as Figure 1a As shown, the superhydrophobic copper mesh shown has superhydrophobicity, and the contact angle to water droplets is above 150°. Such as Figure 1b As shown, there is a typical micro-nano composite structure on the surface of the superhydrophobic copper mesh, and this type of structure plays an extremely important role in enhancing the hydrophobic performance of the copper mesh. The superhydrophobic copper mesh was bonded to the polymer tubing 1 with an inner diameter of 8 mm and an outer diameter of 10 mm by using cell...

Embodiment 2

[0032] Soak a commercial 50-mesh copper mesh (with a maximum pore size of about 500 microns) in 4M hydrochloric acid for 10 minutes, soak the copper mesh in 1M sodium hydroxide and 0.13M ammonium persulfate for 5 minutes, wash and dry in the air. After soaking in 1 mM ethanol solution of dodecyl mercaptan for 2 hours, rinse with ethanol, and dry to obtain a superhydrophobic macroporous mesh material, that is, a superhydrophobic copper mesh. The superhydrophobic copper mesh was bonded to a polymer elbow with an inner diameter of 5 mm and an outer diameter of 6 mm by using cellulose-based polyacrylate adhesive tape to obtain a superhydrophobic pump. Such as Figure 4 As shown, the obtained super-hydrophobic pump is placed, and a 3-5 mm cellulose film layer is set in the elbow as the hydrophilic material layer 4 . Use a hydrophobic syringe to continuously transport the droplets to the lower surface of the superhydrophobic pump. Due to the asymmetric Laplace pressure, the droplet...

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Abstract

The invention discloses a super-drainage pump for spontaneously transporting tiny water drops through antigravity and a preparation method and application of the super-drainage pump, belonging to the fields of function materials and the fluid control technology. A super-drainage wide-mesh net is adhered to the end of a polymer tube at fixed points in a single-side manner, a hydrophilic material layer is filled inside the tube, and liquid drops can be collected and transported through antigravity successfully. When the super-drainage pump for spontaneously transporting tiny water drops through antigravity is adopted for performing antigravity transportation of the liquid drops, a super-drainage substrate is adopted to contain small liquid drops and small liquid drops can be picked up directly, or a hydrophobic needle is utilized to transport small liquid drops to the lower surface of the super-drainage pump continuously, the small liquid drops are enabled to be collected upwards, the liquid level is elevated and high-efficiency, rapid and safe liquid drop transportation can be realized.

Description

technical field [0001] The invention belongs to the technical field of functional materials and fluid control, in particular to the fields of micro-droplet collection and micro-fluidic device design, and more specifically, a superhydrophobic pump and its Preparation method and use. Background technique [0002] With the development of interface science, designing and synthesizing multifunctional integrated microfluidic devices is one of the important research contents in the field of materials. Among them, the collection, manipulation and driving of droplets are directly related to the development and application of microfluidic devices, and have huge scientific research and application prospects. Usually, external propulsion devices such as mechanical pumps can be used to control the flow direction and height of liquid in microfluidic devices, but these methods require external energy sources such as electric fields, and the preparation work is complicated, which limits th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L3/00B01J19/00
Inventor 刘克松曹墨源马晓燕李浩江雷
Owner BEIHANG UNIV
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