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Nitrocellulose membrane and preparation method thereof

A technology of nitrocellulose membrane and scraping membrane, applied in chemical instruments and methods, other chemical processes, ion exchange and other directions, can solve problems such as affecting the quality of nitrocellulose membrane, impurity can not be discharged in time, etc., to achieve perfect effective pore size, The effect of improving porosity and smoothing membrane structure

Pending Publication Date: 2022-03-04
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order not to affect production and ensure production efficiency, only 66% of the treatment liquid in the liquid tank can be replaced every time the treatment liquid soaked in the NC membrane in the liquid tank is replaced, resulting in the impurity contained in the remaining unreplaced treatment liquid cannot be discharged in time. The treatment solution that has not been completely replaced is used in continuous production and use, which may easily cause impurities in the treatment solution to adhere to the surface of the nitrocellulose membrane; at the same time, when the nitrocellulose membrane is produced, there will be a large number of air bubbles on the surface of the nitrocellulose membrane, which will affect Quality of nitrocellulose membrane

Method used

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  • Nitrocellulose membrane and preparation method thereof
  • Nitrocellulose membrane and preparation method thereof
  • Nitrocellulose membrane and preparation method thereof

Examples

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preparation example Construction

[0049] The preparation method of NC film in this paper, comprises the following steps:

[0050] Step 1, preparation of nitrocellulose membrane solution;

[0051] Step 2, degassing the nitrocellulose membrane solution in step 1 to obtain a nitrocellulose membrane concentrate;

[0052] Step 3: Scrape the nitrocellulose membrane concentrate after degassing in step 2 to form a film, and use a scraper tool to scrape the film on a clean tempered glass plate;

[0053] Step 4, shaping the nitrocellulose membrane formed by scraping the membrane in step 3, putting it into a gel water bath at a constant temperature, and undergoing water treatment to obtain the shaped nitrocellulose membrane;

[0054] Step five, drying the nitrocellulose membrane after setting in step four.

[0055] The nitrocellulose membrane solution is prepared from the following materials in parts by weight:

[0056]

[0057] The solvent includes one of N,N-dimethylformamide and N,N-dimethylacetamide or two of t...

Embodiment 1

[0065] (1) Preparation of nitrocellulose membrane solution: Pour 0.02g of hydrotalcite, 20g of N,N-dimethylacetamide, and 3g of nitrocellulose particles into the reaction device for stirring. The stirring time is more than 4h. This process is carried out at room temperature. Then add 0.2g of acetone, 5g of polysulfone, and 2g of polyvinylpyrrolidone and continue to stir for 24 to 36 hours at a temperature of 60°C. Pay attention to the content of solids in the reaction device until they are completely dissolved;

[0066] (2) Put the prepared NC membrane liquid into a dry environment and let it stand for defoaming. During this process, pay attention to foreign matter pollution and keep the dry environment clean;

[0067] (3) Before starting the scraping process, it is recommended to clean the scraper glass with alcohol, then rinse it with deionized water and dry it. Pour the NC film solution onto the glass plate, scrape the film on the glass plate at a constant speed with a spat...

example 2

[0072] Example 2 Preparation of nitrocellulose membrane solution (1) is to pour 0.02g hydrotalcite, 20g N,N-dimethylacetamide, and 3g nitrocellulose particles into the reaction device for stirring. The stirring time is greater than 4h. Then add 0.2g of acetone, 5g of polysulfone, and 2g of polyvinylpyrrolidone and continue to stir for 24 to 36 hours at a temperature of 60°C. Pay attention to observe the content of solids in the reaction device until they are completely dissolved; the subsequent steps are the same as in Example 1 (2) ~ (6).

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Abstract

The invention discloses a nitrocellulose membrane, which is prepared from a nitrocellulose membrane solution, and the nitrocellulose membrane solution comprises the following raw materials by weight: 20-21 parts of a solvent; 0.2 to 0.3 part of a cosolvent; 2-3 parts of a non-solvent; 5-6 parts of a forming agent; 0.02 to 0.08 part of hydrotalcite; and 3-4 parts of nitrocellulose particles. According to the nitrocellulose membrane prepared by the preparation method disclosed by the invention, the added hydrotalcite has a special layered structure, so that a functional high-molecular substance can enter interlayer gaps of the hydrotalcite, the functional high-molecular substance is expanded without changing the structure of the functional high-molecular substance, and the nitrocellulose membrane with the multi-pore-diameter supporting layer has the advantages that the effective pore diameter is perfected, and the hydrophilicity of the nitrocellulose membrane is effectively improved; meanwhile, the high binding force is achieved, and the problem that blending particles are uneven in distribution and prone to agglomeration can be solved. The aperture is effectively improved, so that the opportunity of binding with nonspecificity is reduced, and false positives generated in the using process of using the nitrocellulose membrane as a carrier are reduced.

Description

technical field [0001] The invention relates to the technical field of cellulose films, more specifically, to a nitrocellulose film and a preparation method thereof. Background technique [0002] Nitrocellulose (NC) membrane is the earliest commercialized microporous membrane, which has a strong non-specific adsorption capacity for proteins, nucleic acids and other macromolecules, and is widely used in the fields of molecular hybridization, western blotting, cell culture and medical diagnosis. be widely used. It is used as the carrier of the C / T line in the colloid test paper, and it is the place where the reaction between the antibody and the antigen occurs; the nitrocellulose membrane is the most widely used transfer medium for Western blotting, and has a strong binding ability to the protein, and Compatible with various chromogenic methods, including isotope, chemiluminescence, conventional chromogenic, staining, and fluorescent chromogenic; low background and high signa...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/285B01D15/08B01J20/30
CPCB01J20/26B01J20/12B01J20/28038B01J20/285B01D15/08
Inventor 宋瑞然周通高青鲍时萍程龙宝王钦杜坤严志雄
Owner HEFEI LUCKY SCI & TECH IND
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