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Chitosan porous functional layer of dustproof and antibacterial mask and preparation method of chitosan porous functional layer

A chitosan and functional layer technology, which is applied in the field of hygienic material preparation, can solve the problems of inability to effectively resist fine particles, poor moisture absorption and air permeability, and difficulty in breathing, and achieve uniform product structure, improved moisture absorption and air permeability, and good controllability Effect

Pending Publication Date: 2019-12-31
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current conventional medical and civilian masks cannot effectively resist fine particles, because they are basically made of non-woven fabrics or fibers with large pores, and tiny particles can still pass through the masks and enter the nasal cavity
Although professional protective masks can filter fine particles, they are thick in texture, poor in moisture absorption and air permeability, and can easily cause breathing difficulties after wearing them. They are especially unsuitable for children, the elderly, and special groups with respiratory diseases.

Method used

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  • Chitosan porous functional layer of dustproof and antibacterial mask and preparation method of chitosan porous functional layer
  • Chitosan porous functional layer of dustproof and antibacterial mask and preparation method of chitosan porous functional layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 0.5 g of sodium alginate and dissolve it in 70 mL of water, add 5 mL of sodium periodate solution (40 mg / mL) dropwise, and react with electromagnetic stirring at room temperature for 4 hours. Add 100 μL of ethylene glycol dropwise to it, stir and react for 1 hour, then use a dialysis bag with a molecular weight cut-off of 3500 to soak in deionized water for dialysis for 24 hours, during which the water is changed every 2 hours, and the vacuum equipment is freeze-dried for 48 hours to obtain the aldehyde Sodium alginate solid.

[0026] (2) Weigh 0.5 g of carboxymethyl chitosan and dissolve it in 15 mL of water. During the process, ultrasonic or stirring is required for about 30 minutes to dissolve. At the same time, the following solution is prepared: 12.5 mg of the above-mentioned alginate sodium alginate is dissolved in 5 mL of water ; 0.75 g glycerol was dissolved in 0.5 mL water, 0.04 g poloxamer was dissolved in 4.5 mL water and 5 mL PBS.

[0027] (3) Add...

Embodiment 2

[0032] (1) Dissolve 0.75 g of starch in 75 mL of water, add 5 mL of sodium periodate solution (80 mg / mL) dropwise, and react with electromagnetic stirring at room temperature for 2 hours. Add 200 μL of ethylene glycol dropwise to it, react for another hour, and then use a dialysis bag with a molecular weight cut-off of 3500 to soak in deionized water for dialysis for 24 hours, during which the water is changed every 2 hours, and the vacuum equipment is freeze-dried for 48 hours to obtain aldehyde Starch.

[0033] (2) Weigh 1.0 g of carboxymethyl chitosan and dissolve it in 30 mL of water. During the process, ultrasonic or stirring is required for about 30 minutes to dissolve. At the same time, the following solution is prepared: 100 mg of the above-mentioned formaldehyde starch is dissolved in 10 mL of water; 0.75 1 g of glycerol was dissolved in 1 mL of water, and 0.30 g of poloxamer was dissolved in 10 mL of water.

[0034] (3) Add the prepared glycerin into the carboxymeth...

Embodiment 3

[0038] (1) Weigh 0.5 g of sodium alginate and dissolve it in 70 mL of water, add 5 mL of sodium periodate solution (40 mg / mL) dropwise, and react with electromagnetic stirring at room temperature for 4 hours. Add 100 μL of ethylene glycol dropwise to it, stir and react for 1 hour, then use a dialysis bag with a molecular weight cut-off of 3500 to soak in deionized water for dialysis for 24 hours, during which the water is changed every 2 hours, and the vacuum equipment is freeze-dried for 48 hours to obtain the aldehyde Sodium alginate solid.

[0039] (2) Dissolve 1.20 g of carboxymethyl chitosan in 55 mL of water, 60 mg of sodium alginate in 10 mL of water, 1.5 g of glycerol in 1 mL of water, and 0.30 g of poloxamer in 20 mL of water In water, 6 mg PEI was dissolved in 5 mL of water. Add glycerin to the above chitosan solution and stir for 5 min. Add the PEI solution to the chitosan solution and stir for 15 minutes. Then the sodium alginate solution was added dropwise into...

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Abstract

The invention discloses a chitosan porous functional layer of a dustproof and antibacterial mask and a preparation method of the chitosan porous functional layer, and belongs to the technical field ofhygienic product material preparation. The preparation method comprises the following steps: 1) preparing a cross-linking agent solution with a proper concentration, then slowly adding the cross-linking agent solution into a sodium periodate solution, mechanically stirring, adding ethylene glycol, stirring to react, and freeze-drying to obtain a macromolecular cross-linking substance; 2) preparing a carboxymethyl chitosan solution, wherein uniformly mixing the macromolecular crosslinking substance with a proper amount of glycerol for reaction, adding a surfactant, and stirring at a high speed; 3) pouring the carboxymethyl chitosan solution obtained after the reaction on a mold, coating, and freeze-drying a coated material; and 4) after vacuum drying, curing the coated material to obtain the chitosan porous functional layer material, which has the advantages of excellent mechanical properties, favorable moisture absorption, favorable air permeability, favorable antibacterial properties, favorable biocompatibility, favorable degradability and no toxicity, and is an ideal mask functional layer material.

Description

technical field [0001] The invention belongs to the field of sanitary product material preparation, and relates to a chitosan porous functional layer of a dustproof and antibacterial mask and a preparation method thereof. Background technique [0002] In recent years, with the gradual deterioration of air quality, the frequency of smog weather phenomenon has become higher and higher. They invade the human respiratory tract and lung lobes when people are unprepared, causing respiratory system diseases, cardiovascular system diseases, blood system diseases, such as pharyngitis, emphysema, asthma, rhinitis, bronchitis, etc. Long-term exposure to this environment can also induce lung cancer, myocardial ischemia and damage, so smog has become one of the main "invisible killers" of health. In addition, dust, droplets, pollen, car exhaust, etc. will cause damage to the respiratory system. Therefore, for your own health, masks have become a must-have artifact for everyone to go out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L5/08C08L5/04C08L3/10C08K5/053C08B37/04C08B31/18A41D13/11
CPCA41D13/1192C08B31/18C08B37/0084C08J9/28C08J2201/0484C08J2305/08C08J2403/10C08J2405/04C08K5/053
Inventor 盛卫琴
Owner HANGZHOU DIANZI UNIV
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