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Method for large-scale production of solvent-based nanofibers

A production method and nanofiber technology, applied in the field of nanotechnology, can solve problems such as inability to achieve industrial scale production, and achieve the effects of improving safety, improving production scale and production efficiency, and high adsorption and permeability

Active Publication Date: 2016-08-03
ZHONG HONG NANO FIBER TECH DANYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the ESD method is simple to operate and has been widely used in scientific research, it can usually only meet the production needs of laboratory scale and cannot meet the requirements of industrial scale production

Method used

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  • Method for large-scale production of solvent-based nanofibers
  • Method for large-scale production of solvent-based nanofibers
  • Method for large-scale production of solvent-based nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment relates to the preparation of antibacterial additives in the polymer spinning dope, and the additives are prepared by the following method:

[0023] (1) adding the modifying agent of nano-silver quality 10wt% to deionized water and stirring reaction 15 at a stirring speed of 1500rpm to form a concentration of 1.0~1.2wt% solution; wherein the average particle diameter of the nano-silver is 20 ~25nm;

[0024] (2) Disperse nano-silver and N-vinyl caprolactam of 3.0 to 5.0 wt% of nano-silver mass in ethylene glycol dimethacrylate at a stirring speed of 1000 rpm to obtain a mixed solution; wherein, the ethylene dimethacrylate The quality of alcohol dimethacrylate is 3 times that of nano silver;

[0025] (3) the mixed solution that step (2) obtains is joined in the solution that step (1) obtains, under the stirring speed of 2000rpm, stirring reaction 30min obtains emulsion, transfers in the reactor subsequently, under N 2 Under the protection of atmosphere, ...

Embodiment 2

[0029] This embodiment relates to the preparation of a polymer spinning dope for nanofibers. The polymer spinning dope consists of 20 parts by mass of 4,4'-MDI, 10 parts by mass of polytetrahydrofuran ether glycol PolyTHF1000, 3 parts by mass of polyether triol N-3050, 2 parts by mass of polyoxypropylene diol Amine D-2000, 2 mass parts of 1,4-butanediol, 2.5 mass parts of antibacterial additives (prepared in Example 1), 2.5 mass parts of styrene maleic anhydride copolymer (SMA1000, maleic anhydride content 42 %, number average molecular weight 2000), the dibutyltin dilaurate of 0.20 mass parts and the antioxidant 1010 of 0.1 mass parts react 100min at 80 ℃; Add the sodium carboxymethylcellulose of 3 mass parts after being cooled to room temperature, 8 After stirring and dispersing the polyvinylpyrrolidone in parts by mass and 48 parts by mass in N,N-dimethylformamide, the polymer spinning dope of this embodiment can be obtained.

Embodiment 3

[0031] This embodiment relates to the preparation of a polymer spinning dope for nanofibers. The polymer spinning dope consists of 22 parts by mass of 4,4'-MDI, 12 parts by mass of polytetrahydrofuran ether glycol PolyTHF1000, 2 parts by mass of polyether triol N-3050, 2 parts by mass of polyoxypropylene diol Amine D-2000, 2~3 mass parts of 1,4-butanediol, 2.5 mass parts of antibacterial additives (prepared in Example 1), 2.5 mass parts of styrene maleic anhydride copolymer (SMA1000, maleic anhydride Content 42%, number average molecular weight 2000), the dibutyltin dilaurate of 0.20 mass parts and the antioxidant 1010 of 0.1 mass parts react 100min at 80 ℃; After cooling to room temperature, add 3 mass parts of sodium carboxymethyl cellulose , 8 parts by mass of polyvinylpyrrolidone and 48 parts by mass of N,N-dimethylformamide were stirred and dispersed to obtain the polymer spinning stock solution of this embodiment.

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Abstract

The invention relates to a large scale production method of solvent type nanofibers. The method comprises the following steps: 1, preparing a polymer spinning stock solution; 2, inputting the polymer spinning stock solution to the nozzles of a spray gun; and 3, ejecting the polymer spinning stock solution from the nozzles to a wire drawing chamber, and drawing the polymer spinning stock solution by using high temperature and high pressure air generated by a high temperature and high pressure air generator to form the nanofibers with the diameter of below 100nm. Compared with the prior art, the large scale production method of solvent type nanofibers without using high voltage eliminates electrode interference, so a plurality of nozzles can be used, thereby the production scale and the production efficiency of the nanofibers are significantly improved; and in addition, the resulting nanofibers have an effective fluid slippery effect of nanofibers, and a filter membrane adopting the solvent type nanofibers has high adsorption and permeability, and can adsorb and filter many foreign matters.

Description

technical field [0001] The invention relates to the technical field of nanotechnology, more specifically, the invention relates to a method for large-scale production of solvent-based nanofibers. Background technique [0002] Nanofibers refer to fibers with a fiber diameter in the range of 1 to 100 nm. When the diameter of the fiber enters the nanometer level from the micron level, it has a significantly improved specific surface area, length-to-diameter ratio, and interpenetration ability. The ESD (ElectroSprayDeposition) electrospinning method to make soluble polymer nanofibers has been widely used. The ESD method dissolves the solute through the solvent, and at the same time adds a high-voltage electrostatic power source to the solvent end, and uses the same-sex repulsion principle to push the solution out, or use pressure to push the polymer out of the pinhole, and the polymer is pushed out After stretching and extending, the surface area expands sharply at the same tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/16D01F8/10D01F1/10D01D5/12D01D1/02D04H1/70
Inventor 崔建中
Owner ZHONG HONG NANO FIBER TECH DANYANG