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A dynamic membrane based on nuclear pore membrane and its preparation method and application

A technology of nuclear pore membranes and dynamic membranes, applied in the field of dynamic membranes, dynamic membranes based on nuclear pore membranes and its preparation, can solve problems such as difficulty in ensuring stability and complexity of engineering applications, high cost, etc., and achieve rapid and effective cleaning , Increase the difficulty of cleaning and restore the effect of flux

Active Publication Date: 2021-06-29
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the filter materials used are either expensive ultrafiltration membranes and microfiltration membranes. The pore size of these small-pore membranes is generally below 5 microns; and complexity

Method used

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  • A dynamic membrane based on nuclear pore membrane and its preparation method and application
  • A dynamic membrane based on nuclear pore membrane and its preparation method and application
  • A dynamic membrane based on nuclear pore membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Dynamic membrane based on nuclear pore membrane and preparation method thereof

[0036] A dynamic membrane based on a nuclear pore membrane is prepared as follows:

[0037] (1) Composite the nuclear pore membrane and the non-woven fabric by hot pressing, the hot pressing temperature is 80° C., the time is 10 seconds, and the pressure is 0.5 bar to obtain a composite membrane;

[0038] (2) the precoat solution (0.2 g / aqueous solution of lin clay) is passed through the composite membrane obtained in step 1) under the condition of 0.5 bar at a filtration pressure, and a mud cake layer is formed on the surface of the nuclear pore membrane after 20 minutes.

[0039] The dynamic membrane based on the nuclear pore membrane obtained in this embodiment is composed of a substrate, a nuclear pore membrane and a mud cake layer from bottom to top;

[0040] Wherein, the material constituting the mud cake layer is kaolin, the thickness of the mud cake layer is 2 mm, and th...

Embodiment 2

[0043] Example 2: Dynamic membrane based on nuclear pore membrane and its preparation method

[0044] A dynamic membrane based on a nuclear pore membrane is prepared as follows:

[0045] (1) Composite the nuclear pore membrane and the non-woven fabric by hot pressing, the hot pressing temperature is 100° C., the time is 15 seconds, and the pressure is 0.5 bar to obtain a composite membrane;

[0046] (2) the precoat solution (0.6 g / liter aqueous solution of gac) is passed through step 1) gained composite membrane under the condition of 0.5 bar at filtration pressure, namely forms mud cake layer on the nuclear pore membrane surface after 30 minutes.

[0047] The dynamic membrane based on the nuclear pore membrane obtained in this embodiment is composed of a substrate, a nuclear pore membrane and a mud cake layer from bottom to top;

[0048] Wherein, the material constituting the mud cake layer is activated carbon, the thickness of the mud cake layer is 1 mm, and the pore diamet...

Embodiment 3

[0051] Example 3: Dynamic membrane based on nuclear pore membrane and its preparation method

[0052] A dynamic membrane based on a nuclear pore membrane is prepared as follows:

[0053] (1) Composite the nuclear pore membrane and the non-woven fabric by hot pressing, the hot pressing temperature is 120° C., the time is 10 seconds, and the pressure is 0.5 bar to obtain a composite membrane;

[0054] (2) the precoat solution (0.5 g / liter aqueous solution of diatomite) is passed through the composite membrane obtained in step 1) under the condition of 0.5 bar at a filtration pressure, and a mud cake layer is formed on the surface of the nuclear pore membrane after 15 minutes.

[0055] The dynamic membrane based on the nuclear pore membrane obtained in this embodiment is composed of a substrate, a nuclear pore membrane and a mud cake layer from bottom to top;

[0056] Wherein, the material constituting the mud cake layer is diatomite, the thickness of the mud cake layer is 3 mm,...

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Abstract

The invention discloses a dynamic membrane based on a nuclear pore membrane, a preparation method and application thereof. The dynamic membrane includes a nuclear pore membrane and a substrate; the substrate is located below the nuclear pore membrane. Pores are uniformly distributed in the nuclear pore membrane; the thickness of the nuclear pore membrane is 5-150 microns; the pore diameter is 0.01-40 microns; the pore density is 1×10 4 pcs / cm²‑5×10 9 pieces / square centimeter; the thickness of the substrate is 5-150 microns; the pore diameter is 0.1-40 microns; the porosity is 30%-60%. The dynamic membrane also includes a mudcake layer; the mudcake layer is located on the nuclear pore membrane. The dynamic membrane provided by the invention fully utilizes the advantage of controllable pore size of the nuclear pore membrane, has short film coating time and high filtration efficiency; the membrane can be repeatedly cleaned and is resistant to high temperature. It can be applied to filter membrane industries such as sewage and wastewater treatment, oil-water separation, food and medicine, and biochemical industry.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a dynamic membrane, and more specifically to a dynamic membrane based on a nuclear pore membrane, a preparation method and application thereof. Background technique [0002] Nuclear pore membrane, also known as nuclear microporous membrane or heavy ion microporous membrane, is formed by punching holes in the insulating material film with heavy ions and then chemically etching to expand the pores. The nuclear pore membrane is also known as the most precise filter membrane in the world, because the same piece of nuclear pore membrane material has almost the same size and shape of all pores. Nuclear pore membranes are currently mainly used in medical filtration and civilian filtration products. [0003] Membrane separation technology uses the permeability of the membrane to realize the separation of ions, molecules or particles in the mixed liquid under the action of driving force. Membra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/14B01D69/12B01D69/02B01D67/00
CPCB01D67/0079B01D69/02B01D69/12B01D69/14B01D2325/24
Inventor 莫丹刘杰肖国青胡正国徐瑚珊
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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