Summary of the invention
The object of the present invention is to provide a kind of protective mask that contains Nano Silver and shitosan.
The present invention also aims to provide a kind of preparation method who contains the protective mask of Nano Silver and shitosan.
A kind of protective mask that contains Nano Silver and shitosan, it is made up of cover body and frenulum, be characterised in that, cover body is made of 5 layer materials: ground floor is the degreasing cotton gauze layer, the second layer, the 3rd layer are for containing the gauze functional layer of Nano Silver and shitosan, the 4th layer is the degreasing cotton gauze layer, and layer 5 is a nonwoven layer.
The particle diameter of described Nano Silver is 2-80nm.
The thickness of described functional layer material is 0.2-2mm, and porosity is greater than 80%.
A kind of preparation method who contains the protective mask of Nano Silver and shitosan is characterized in that, carries out according to following steps:
(1) take by weighing shitosan and be dissolved in 1% the acetic acid solution, the preparation mass concentration is the chitosan solution of 1-3%;
(2) take by weighing AgNO
3Be dissolved in the chitosan solution, after fully stirring, forming concentration is the AgNO of 0.01-1M
3-shitosan mixed solution left standstill 6-12 hour;
(3) double-deck degreasing cotton gauze is immersed in AgNO
3In-shitosan the mixed solution, after 4-24 hour under-20 ℃~-40 ℃ conditions pre-freeze, freeze drying makes the double-deck degreasing cotton gauze that contains Nano Silver and shitosan;
(4) the double-deck degreasing cotton gauze that will contain Nano Silver and shitosan is soaked in 2.5% the glutaraldehyde solution, 0.5-6 hour postlyophilization;
(5) will take out through the degreasing cotton gauze that step (4) is handled, be soaked in mass concentration and be in 3% the sodium borohydride solution more than 6 hours, take out, it is immersed in 1% the sodium hydroxide solution 3-8 hour, after the water flushing, freeze drying obtains to contain the gauze functional layer of Nano Silver and shitosan;
(6) make cover body according to the order of gauze layer, the gauze functional layer that contains Nano Silver and shitosan, gauze layer, nonwoven layer, the frenulum perforation is left in the cover body both sides, then frenulum is passed frenulum perforation and seam knot.
Beneficial effect of the present invention: protective mask of the present invention contains Nano Silver and shitosan, can suppress microbial growth effectively, while good air permeability, comfortable wearing.The preparation method of protective mask of the present invention is simple, and the preparation material source is extensive, is fit to large-scale industrial production.
The specific embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Implementing used primary raw material is shitosan (deacetylation 95% molecular weight 200,000), silver nitrate, NaOH, glutaraldehyde, sodium borohydride, acetate, medical absorbent cotton gauze and nonwoven.Chemical reagent is chemical pure.
Embodiment one
(1) shitosan that takes by weighing 0.5g is dissolved in the acetic acid solution of 50ml 1%, and the preparation mass concentration is 1% chitosan solution.
(2) take by weighing 0.085g silver nitrate (AgNO
3) be dissolved in the 50ml chitosan solution, after fully stirring, forming concentration is the AgNO of 0.01M
3-chitosan solution left standstill 6-12 hour.
(3) double-deck degreasing cotton gauze is immersed in AgNO
3In-shitosan the mixed solution ,-20 ℃ of pre-freezes, and freeze drying makes the double-deck degreasing cotton gauze that contains Nano Silver and shitosan after 4 hours.
(4) the double-deck degreasing cotton gauze that will contain Nano Silver and shitosan is soaked in 2.5% the glutaraldehyde solution, 0.5 hour postlyophilization.
(5) will take out through the degreasing cotton gauze that step (4) is handled, be soaked in mass concentration and be in 3% the sodium borohydride solution 6 hours, remove the little molecule of residual glutaraldehyde, simultaneously with AgNO
3Be reduced to Nano Silver, the particle diameter of Nano Silver is 2-80nm, takes out, and then it is immersed in 1% the sodium hydroxide solution 3-8 hour, and after the water flushing, freeze drying obtains to contain the gauze functional layer of Nano Silver and shitosan.
(6) make cover body according to the order of gauze layer, the gauze functional layer that contains Nano Silver and shitosan, gauze layer, nonwoven layer, the frenulum perforation is left in the cover body both sides, then frenulum is passed frenulum perforation and seam knot.
Embodiment two
(1) shitosan that takes by weighing 1g is dissolved in the acetic acid solution of 50ml 1%, and the preparation mass concentration is 2% chitosan solution.
(2) take by weighing 3.4g silver nitrate (AgNO
3) be dissolved in the 50ml chitosan solution, after fully stirring, forming concentration is the AgNO of 0.4M
3-chitosan solution left standstill 6-12 hour.
(3) double-deck degreasing cotton gauze is immersed in AgNO
3In-shitosan the mixed solution ,-25 ℃ of pre-freezes, and freeze drying makes the double-deck degreasing cotton gauze that contains Nano Silver and shitosan after 8 hours.
(4) the double-deck degreasing cotton gauze that will contain Nano Silver and shitosan is soaked in 2.5% the glutaraldehyde solution, 1 hour postlyophilization.
(5) will take out through the degreasing cotton gauze that step (4) is handled, be soaked in mass concentration and be in 3% the sodium borohydride solution 7 hours, remove the little molecule of residual glutaraldehyde, simultaneously with AgNO
3Be reduced to Nano Silver, the particle diameter of Nano Silver is 2-80nm, takes out, and then it is immersed in 1% the sodium hydroxide solution 3-8 hour, and after the water flushing, freeze drying obtains to contain the gauze functional layer of Nano Silver and shitosan.
(6) make cover body according to the order of gauze layer, the gauze functional layer that contains Nano Silver and shitosan, gauze layer, nonwoven layer, the frenulum perforation is left in the cover body both sides, then frenulum is passed frenulum perforation and seam knot.
Embodiment three
(1) shitosan that takes by weighing 1.5g is dissolved in the acetic acid solution of 50ml 1%, and the preparation mass concentration is 3% chitosan solution.
(2) take by weighing 0.85g silver nitrate (AgNO
3) be dissolved in the 50ml chitosan solution, after fully stirring, forming concentration is the AgNO of 0.1M
3-chitosan solution left standstill 6-12 hour.
(3) double-deck degreasing cotton gauze is immersed in AgNO
3In-shitosan the mixed solution ,-30 ℃ of pre-freezes, and freeze drying makes the double-deck degreasing cotton gauze that contains Nano Silver and shitosan after 12 hours.
(4) the double-deck degreasing cotton gauze that will contain Nano Silver and shitosan is soaked in 2.5% the glutaraldehyde solution, 2 hours postlyophilizations.
(5) will take out through the degreasing cotton gauze that step (4) is handled, be soaked in mass concentration and be in 3% the sodium borohydride solution 8 hours, remove the little molecule of residual glutaraldehyde, simultaneously with AgNO
3Be reduced to Nano Silver, the particle diameter of Nano Silver is 2-80nm, takes out, and then it is immersed in 1% the sodium hydroxide solution 3-8 hour, and after the water flushing, freeze drying obtains to contain the gauze functional layer of Nano Silver and shitosan.
(6) make cover body according to the order of gauze layer, the gauze functional layer that contains Nano Silver and shitosan, gauze layer, nonwoven layer, the frenulum perforation is left in the cover body both sides, then frenulum is passed frenulum perforation and seam knot.
Embodiment four
(1) shitosan that takes by weighing 1.5g is dissolved in the acetic acid solution of 50ml 1%, and the preparation mass concentration is 3% chitosan solution.
(2) take by weighing 6.8g silver nitrate (AgNO
3) be dissolved in the 50ml chitosan solution, after fully stirring, forming concentration is the AgNO of 0.8M
3-chitosan solution left standstill 6-12 hour.
(3) double-deck degreasing cotton gauze is immersed in AgNO
3In-shitosan the mixed solution ,-35 ℃ of pre-freezes, and freeze drying makes the double-deck degreasing cotton gauze that contains Nano Silver and shitosan after 12 hours.
(4) the double-deck degreasing cotton gauze that will contain Nano Silver and shitosan is soaked in 2.5% the glutaraldehyde solution, 4 hours postlyophilizations.
(5) will take out through the degreasing cotton gauze that step (4) is handled, be soaked in mass concentration and be in 3% the sodium borohydride solution 8 hours, remove the little molecule of residual glutaraldehyde, simultaneously with AgNO
3Be reduced to Nano Silver, the particle diameter of Nano Silver is 2-80nm, takes out, and then it is immersed in 1% the sodium hydroxide solution 3-8 hour, and after the water flushing, freeze drying obtains to contain the gauze functional layer of Nano Silver and shitosan.
(6) make cover body according to the order of gauze layer, the gauze functional layer that contains Nano Silver and shitosan, gauze layer, nonwoven layer, the frenulum perforation is left in the cover body both sides, then frenulum is passed frenulum perforation and seam knot.
Embodiment five
(1) shitosan that takes by weighing 1.5g is dissolved in the acetic acid solution of 50ml 1%, and the preparation mass concentration is 3% chitosan solution.
(2) take by weighing 8.5g silver nitrate (AgNO
3) be dissolved in the 50ml chitosan solution, after fully stirring, forming concentration is the AgNO of 1M
3-chitosan solution left standstill 6-12 hour.
(3) double-deck degreasing cotton gauze is immersed in AgNO
3In-shitosan the mixed solution ,-40 ℃ of pre-freezes, and freeze drying makes the double-deck degreasing cotton gauze that contains Nano Silver and shitosan after 12 hours.
(4) the double-deck degreasing cotton gauze that will contain Nano Silver and shitosan is soaked in 2.5% the glutaraldehyde solution, 6 hours postlyophilizations.
(5) will take out through the degreasing cotton gauze that step (4) is handled, be soaked in mass concentration and be in 3% the sodium borohydride solution 12 hours, remove the little molecule of residual glutaraldehyde, simultaneously with AgNO
3Be reduced to Nano Silver, the particle diameter of Nano Silver is 2-80nm, takes out, and then it is immersed in 1% the sodium hydroxide solution 3-8 hour, and after the water flushing, freeze drying obtains to contain the gauze functional layer of Nano Silver and shitosan.
(6) make cover body according to the order of gauze layer, the gauze functional layer that contains Nano Silver and shitosan, gauze layer, nonwoven layer, the frenulum perforation is left in the cover body both sides, then frenulum is passed frenulum perforation and seam knot.
The protective mask that contains Nano Silver and shitosan of above embodiment preparation is made of cover body and frenulum, and overall schematic as shown in Figure 1; Cover body constitutes (as shown in Figure 2) by 5 layers of gauze material: ground floor is the degreasing cotton gauze layer, and the second layer, the 3rd layer are for containing the gauze functional layer of Nano Silver and shitosan, and the 4th layer is the degreasing cotton gauze layer, and layer 5 is a nonwoven layer.