Dynamic membrane based on nuclear track membrane and preparation method and application of dynamic membrane

A dynamic membrane and nuclear pore membrane technology, applied in the field of materials, can solve the problems of high cost, difficulty in ensuring the stability and complexity of engineering applications, etc., and achieve the effect of improving the difficulty of cleaning, rapid and effective cleaning, and uniform structure

Active Publication Date: 2019-04-12
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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  • Dynamic membrane based on nuclear track membrane and preparation method and application of dynamic membrane
  • Dynamic membrane based on nuclear track membrane and preparation method and application of dynamic membrane
  • Dynamic membrane based on nuclear track membrane and preparation method and application of dynamic membrane

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, promptly forms mud cake layer on 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 diameter...

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 track membrane and a preparation method and application of the dynamic membrane. The dynamic membrane comprises the nuclear track membraneand a base material; the base material is located below the nuclear track membrane. Channels are uniformly distributed in the nuclear track membrane; for the nuclear track membrane, the thickness is5-150 micrometer, the pore diameter is 0.01-40 micrometer, and the hole density ranges from 1*104 holes/square centimeter to 5*109 holes/square centimeter; for the base material, the thickness is 5-150 micrometer, the pore diameter is 0.1-40 micrometer, and the porosity is 30-60%; the dynamic membrane further comprises a mud cake layer which is located on the upper portion of the nuclear track membrane. According to the dynamic membrane, the advantage that the nuclear track membrane pore diameter is controllable is fully played, the coating time is short, and the filter efficiency is high; themembrane can be cleaned repeatedly and is resistant to high temperature. The dynamic membrane can be applied to the filter film industry fields of waste water treatment, oil-water separation, food and medicine, biochemical engineering and the like.

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 Applications(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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