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Small-bore nuclear pore filter membrane and production method thereof

The technology of a nuclear pore filter membrane and a production method is applied in the field of small-pore nuclear pore filter membrane and its production, which can solve the problems of inability to produce columnar nuclear pore filter membranes, achieve low cost, simple method, and increase the etching speed ratio Effect

Active Publication Date: 2010-07-07
WUHAN W E O SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention discloses a small-diameter nuclear pore filter membrane and its production method to solve the problem that the existing production process cannot produce a columnar nuclear pore filter membrane with a pore size between φ0.03~φ2μm

Method used

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Embodiment Construction

[0021] Below in conjunction with specific embodiment the production method of the small-aperture nuclear pore filter membrane of the present invention is described in detail:

[0022] Step 1: Use a high-energy linear accelerator to accelerate sulfur ions, and the accelerated sulfur ions enter the low-vacuum irradiation chamber through the ion velocity flow pipe, and directly irradiate on the film placed in the irradiation chamber in advance. The film is specifically 12 PET (polyethylene terephthalate, chemical formula: COC6H4COOCH2CH2O) plastic film between ~20 μm (in other application examples, the plastic film can also be replaced by other materials). Among them, in the process of penetrating the PET plastic film, the sulfide ion forms a columnar damage area (ie track) due to ionization.

[0023] Step 2: In an aerobic environment where the oxygen concentration is always not lower than 2 / 5, irradiate the film after sulfide ion irradiation with a high-pressure mercury lamp of ...

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PUM

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Abstract

The invention discloses a small-bore nuclear pore filter membrane and a production method thereof, which are used for solving the problem that the conventional production process cannot produce a columnar nuclear pore filter membrane with the pore diameter between phi0.03 and phi2 microns. The method comprises the following steps: irradiating a membrane to form a columnar damage area by using high-energy sulfur ions; irradiating the ion-irradiated membrane by using ultraviolet for 1 to 2 hours under an oxygen-containing environment that the oxygen concentration is not lower than 2 / 5; ageing the ultraviolet-irradiated membrane under a ventilated environment; and putting the aged membrane into an alkali etching bath with an ultrasonic device to perform etching, oscillating the alkali etching solution by using ultrasonic during etching, and obtaining the columnar nuclear pore filter membrane with the pore diameter between phi0.03 and phi2 microns after etching. The method is simple, has low cost, can be greatly popularized and can realize industrialization.

Description

technical field [0001] The invention relates to a small-diameter nuclear pore filter membrane and a production method thereof. Background technique [0002] Nuclear pore filter membrane (also known as nuclear pore membrane) is a new type of filter membrane used for precision filtration and sieving of particles. It has long been used as a filter membrane in the fields of medicine, environment, and semiconductor industry. [0003] The production process of the traditional nuclear pore membrane is: use high-energy heavy ion irradiation to form a damaged area, and then form holes after appropriate chemical etching. Wherein, when the film after irradiation is chemically treated, because the etching rate ratio (the etching rate ratio is the ratio of the track etching rate to the bulk etching rate) is usually between 3-10 times, therefore, the conventional method produces The pore diameter of the filter membrane is generally between φ2~φ10μm. When the pore diameter required to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/00B01D71/48
Inventor 罗勇吴其玉杨建利
Owner WUHAN W E O SCI & TECH DEV
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