Preparation method of silicon dioxide modified porous polyvinyl alcohol non-woven fabric

A technology of porous polyvinyl alcohol and silicon dioxide, which is applied in chemical instruments and methods, non-woven fabrics, textiles and papermaking, etc., can solve the problems of rare reports, achieve moderate porosity, uniform pore distribution, and moisture absorption. The effect of excellent performance

Pending Publication Date: 2020-11-27
武汉智达纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be known from the above-mentioned prior art that by preparing polyvinyl alcohol alone or by compounding polyvinyl alcohol and nanomaterials to prepare spinning liquid, and preparing functional polyvinyl alcohol composite fibers through electrospinning, but currently based on porous polyvinyl alcohol composite fibers There are few reports on fibrous membranes

Method used

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  • Preparation method of silicon dioxide modified porous polyvinyl alcohol non-woven fabric
  • Preparation method of silicon dioxide modified porous polyvinyl alcohol non-woven fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Add polyvinyl alcohol powder into deionized water, heat and dissolve at 35° C. to obtain a polyvinyl alcohol solution with a content of 10 wt%.

[0027] (2) According to the ratio of the amount of the silicon precursor to the deionized water is 1:3.5, add the silicon precursor to the deionized water, mix well, add polyethylene glycol solution, continue to stir evenly, add hydrochloric acid dropwise Adjust the pH value of the system to 3, and add polyethylene glycol dropwise while stirring and reacting at a rate of 1000r / min for 1h to obtain a silica-modified polyvinyl alcohol solution. In the silica-modified polyvinyl alcohol solution, the The mass ratio of silicon, ethylene glycol and polyvinyl alcohol is 1:7:13.

[0028] (3) Add 3% of the total mass of aminated silica sol to the silica-modified polyvinyl alcohol solution, stir evenly, and place it in the electrospinning equipment at a voltage of 17kV and a receiving distance of 20cm Under the conditions of electr...

Embodiment 2

[0032] (1) Add polyvinyl alcohol powder into deionized water, heat and dissolve at 40° C. to obtain a polyvinyl alcohol solution with a content of 15 wt%.

[0033] (2) According to the ratio of the amount of the silicon precursor to the deionized water is 1:4, add the silicon precursor to the deionized water, mix well, add polyethylene glycol solution, continue to stir evenly, add hydrochloric acid dropwise Adjust the pH value of the system to 4, and add polyethylene glycol dropwise while stirring and reacting at a rate of 2000r / min for 2 hours to obtain a silica-modified polyvinyl alcohol solution. In the silica-modified polyvinyl alcohol solution, the The mass ratio of silicon, ethylene glycol and polyvinyl alcohol is 1:10:18.

[0034] (3) Add aminated silica sol accounting for 5% of the total mass to the silica-modified polyvinyl alcohol solution, stir evenly, and place it in the electrospinning equipment at a voltage of 20kV and a receiving distance of 25cm Under the cond...

Embodiment 3

[0038](1) Add polyvinyl alcohol powder into deionized water, heat and dissolve at 40° C. to obtain a polyvinyl alcohol solution with a content of 15 wt%.

[0039] (2) According to the ratio of the amount of the silicon precursor to the deionized water is 1:4, add the silicon precursor to the deionized water, mix well, add polyethylene glycol solution, continue to stir evenly, add hydrochloric acid dropwise Adjust the pH value of the system to 4, and add polyethylene glycol dropwise while stirring and reacting at a rate of 2000r / min for 2 hours to obtain a silica-modified polyvinyl alcohol solution. In the silica-modified polyvinyl alcohol solution, the The mass ratio of silicon, ethylene glycol and polyvinyl alcohol is 1:10:18.

[0040] (3) Add aminated silica sol accounting for 5% of the total mass to the silica-modified polyvinyl alcohol solution, stir evenly, and place it in the electrospinning equipment at a voltage of 20kV and a receiving distance of 25cm Under the condi...

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Abstract

The invention provides a preparation method of a silicon dioxide modified porous polyvinyl alcohol non-woven fabric. The method comprises the following steps: adding polyvinyl alcohol powder into deionized water, and carrying out heating to dissolve to obtain a polyvinyl alcohol solution; adding a precursor of silicon into deionized water, uniformly mixing, adding a polyethylene glycol solution, continuously and uniformly stirring the solution, dropwise adding hydrochloric acid to adjust the pH value of the system to be acidic, and stirring the solution for reaction while dropwise adding polyethylene glycol to obtain a silicon dioxide modified polyvinyl alcohol solution; adding aminated silicon dioxide sol into the silicon dioxide modified polyvinyl alcohol solution to form a spinning solution, and performing electrostatic spinning to prepare a silicon dioxide modified polyvinyl alcohol fiber membrane; putting the silicon dioxide modified porous polyvinyl alcohol fiber membrane betweentwo pieces of base cloth, and needling to obtain a silicon dioxide modified polyvinyl alcohol non-woven fabric; and treating the silicon dioxide modified polyvinyl alcohol non-woven fabric with ethanol, and soaking the treated polyvinyl alcohol non-woven fabric into a potassium hydroxide solution and carrying out heating to obtain the silicon dioxide modified porous polyvinyl alcohol non-woven fabric.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and in particular relates to a preparation method of silicon dioxide modified porous polyvinyl alcohol nonwoven fabric. Background technique [0002] Polyvinyl alcohol is a water-soluble and completely biodegradable polymer formed by the alcoholysis of polyvinyl acetate. Its molecular main chain is a carbon chain. Intermolecular and intramolecular hydrogen bonds have good hygroscopic properties and good spinnability, but poor mechanical properties, and need to be compounded with other materials to prepare fiber materials that meet the needs of use. [0003] Electrospinning is the use of a strong electrostatic field force generated by a high-voltage power supply to spin a spinnable polymer solution or melt into an ultrafine fiber membrane with a diameter ranging from micrometers to nanometers. Chinese patent CN101724917B discloses a preparation method of a polyvinyl alcohol electrospinn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/02B32B27/12B32B27/30B32B3/24B32B5/06B32B33/00B32B37/02B32B37/16B32B38/08D04H1/4309D04H1/728D06M11/79D06M101/24
CPCB32B5/022B32B5/06B32B5/26B32B37/02B32B37/16B32B38/08B32B3/266B32B33/00D04H1/4309D04H1/728D06M11/79D06M2101/24B32B2250/03B32B2250/20B32B2250/40B32B2262/0223B32B2307/726
Inventor 高志英
Owner 武汉智达纺织科技有限公司
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