CN111557496A - Color-changeable protective mask - Google Patents
Color-changeable protective mask Download PDFInfo
- Publication number
- CN111557496A CN111557496A CN202010313079.9A CN202010313079A CN111557496A CN 111557496 A CN111557496 A CN 111557496A CN 202010313079 A CN202010313079 A CN 202010313079A CN 111557496 A CN111557496 A CN 111557496A
- Authority
- CN
- China
- Prior art keywords
- color
- layer
- changeable
- woven fabric
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/02—Layered materials
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/12—Hygroscopic; Water retaining
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
- D06M13/207—Substituted carboxylic acids, e.g. by hydroxy or keto groups; Anhydrides, halides or salts thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
- D06M13/248—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing sulfur
- D06M13/256—Sulfonated compounds esters thereof, e.g. sultones
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
- D06M15/233—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated aromatic, e.g. styrene
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/244—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons
- D06M15/256—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of halogenated hydrocarbons containing fluorine
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/61—Polyamines polyimines
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M17/00—Producing multi-layer textile fabrics
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The invention relates to the technical field of protective articles, and discloses a color-changeable protective mask which comprises a mask body and an ear band, wherein the mask body comprises a color-changeable layer positioned in the middle, an outer protective layer and an inner moisture absorption layer which are respectively positioned on two sides of the color-changeable layer, and the color-changeable layer is made of polypropylene melt-blown non-woven fabric which is subjected to electret treatment and is covered with a modified polyaniline film. The color-changeable layer is made of the polypropylene melt-blown non-woven fabric which is subjected to electret treatment and covered with the modified polyaniline film, the surface of the polypropylene melt-blown non-woven fabric is subjected to the electret treatment and then carries a large amount of static charges, fine particles can be captured by utilizing the electrostatic adsorption effect, and the filtering and protecting effects of the mask are enhanced; meanwhile, polyaniline is an electrochromic material, along with the adsorption of particle pollutants when the mask is used, the charges on the surface of the melt-blown non-woven fabric are gradually reduced, and the color of the modified polyaniline film can be gradually lightened, so that the color change of the color-changeable layer can play a role in warning, and whether the mask needs to be replaced or not is judged.
Description
Technical Field
The invention relates to the technical field of protective articles, in particular to a color-changeable protective mask.
Background
The mask is one of the most commonly used protective articles in life, is a tool which is worn at the mouth and nose part and used for filtering air entering the mouth and nose so as to prevent harmful gas, smell and spray from entering and exiting the mouth and nose of a wearer, has a certain filtering effect on air entering the lung, and has a very good protective effect when the mask is worn when respiratory infectious diseases are prevalent and the mask is used in an environment polluted by dust and the like.
Masks in the prior art are generally made of one or more layers of non-woven fabrics, for example, "a multifunctional protective mask" disclosed in the chinese patent literature, and the publication No. CN106235470A includes a mask body, elastic ear bands, a sealing strip and a shaping strip arranged in the mask body and used for matching the shape of the nose bridge, and the mask body sequentially includes along the direction close to the mouth: the surface of the first non-woven fabric layer is spun with polyvinylidene fluoride nano fibers to form a nano fiber coating; the second non-woven fabric layer is an acid non-woven fabric layer; a third non-woven fabric layer, wherein the third non-woven fabric layer is an alkaline non-woven fabric layer; and the fourth non-woven fabric layer is a polypropylene spun-bonded non-woven fabric layer. This gauze mask passes through the non-woven fabrics of four layers different functions, can effectively intercept the pollutant and provide comfortable wearing environment for the person of wearing.
However, after the protective mask is worn for a period of time, the harmful particles filtered and adsorbed on the surface are too much, so that the protective effect can not be achieved, and the protective mask can be worn continuously to possibly suck the particles, thereby causing harm to human bodies. Because pollutant concentration is different in the environment that the person of wearing is located, the inefficacy change time of gauze mask is also different, and the adsorption capacity of pollutant can't direct observation out of the gauze mask among the prior art, consequently hardly judges when to need to change, and the live time overlength leads to the security performance to descend, changes frequently and again causes the gauze mask extravagant, influences the performance of gauze mask.
Disclosure of Invention
The invention provides a color-changeable protective mask, aiming at overcoming the problems that the mask in the prior art can not directly observe the adsorption quantity of pollutants, so that the mask is difficult to judge when the mask needs to be replaced, the safety performance is reduced due to overlong wearing time, waste is caused due to frequent replacement, and the use performance of the mask is influenced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a changeable colour protective facial mask, includes gauze mask body and ear area, the gauze mask body is including being located the changeable colour layer in the middle and being located the outer inoxidizing coating and the interior moisture absorption layer of changeable colour layer both sides respectively, the material of changeable colour layer is the polypropylene melt-blown non-woven fabrics that covers after electret treatment has modified polyaniline film.
The mask body of the color-changeable protective mask comprises three layers of materials, wherein the outer protective layer is used for blocking liquid, and the color-changeable layer is used for adsorbing pollutant particles so as to ensure the protective performance of the mask; the inner moisture absorption layer is used for absorbing moisture exhaled by a wearer and ensuring the wearing comfort of the mask. The color-changeable layer is made of electret-treated polypropylene melt-blown non-woven fabric covered with a modified polyaniline film, the polypropylene melt-blown non-woven fabric is an electret material, the fiber surface can carry a large amount of static charges after electret treatment, and the polypropylene melt-blown non-woven fabric has good charge stability, so that fine particles can be captured by utilizing the electrostatic adsorption effect, compared with the simple mechanical filtration effect, the filtering and protecting effect of the mask can be greatly enhanced, and the breathing resistance of a wearer is not increased. Meanwhile, polyaniline is an electrochromic material, reversible color change can occur under the action of an electric field, a modified polyaniline film covers the surface of the polypropylene melt-blown non-woven fabric, the modified polyaniline film is changed from yellow in a reduction state to blue in an oxidation state after electret treatment, and along with the adsorption of particle pollutants when the mask is used, the charges on the surface of the melt-blown non-woven fabric are gradually reduced, the surface potential is reduced, the intensity of an electrostatic field around the modified polyaniline film is reduced, the color can be gradually lightened, therefore, the warning effect can be achieved through the color change of the color-changeable layer, whether the mask needs to be replaced or not is judged, and the protection effect of the mask is ensured.
Preferably, the preparation method of the color-changeable layer material comprises the following steps:
(1) mixing citric acid, dodecylbenzene sulfonic acid and CuSO4·5H2Mixing O, dimethylbenzene and water, uniformly stirring, adding aniline, cooling to 0-4 ℃, adding an ammonium persulfate solution with the mass fraction of 15-20%, stirring for reaction for 30-60 min, demulsifying with ethanol, filtering, washing and drying to obtain the composite doped polyaniline;
(2) adding sodium bicarbonate into a polytetrafluoroethylene emulsion, adding a functional monomer accounting for 1/5-1/4 of the total mass under stirring, soaking for 1-2 hours, heating to 75-78 ℃, adding ammonium persulfate accounting for 1/5-1/4 of the total mass, reacting for 20-30 min, dropwise adding the rest functional monomer and ammonium persulfate within 2-4 hours, reacting for 20-30 min under heat preservation, heating to 85-90 ℃, reacting for 1-2 hours, cooling, and adjusting the pH to 6-8 with ammonia water to obtain a copolymer emulsion;
(3) dissolving the composite doped polyaniline prepared in the step (1) in a mixed solvent of m-cresol and trichloromethane, stirring for 20-30 h, adding the copolymer emulsion prepared in the step (2) and hydrochloric acid, and stirring for reacting for 30-40 min to obtain a finishing agent;
(4) finishing the polypropylene melt-blown non-woven fabric by using the prepared finishing agent by adopting a two-dipping and two-rolling method, and drying at 80-90 ℃ to obtain the melt-blown non-woven fabric covered with the modified polyaniline film;
(5) and carrying out corona charging electret treatment on the melt-blown non-woven fabric covered with the modified polyaniline film to obtain the color-changeable layer material.
Preferably, the citric acid, dodecylbenzene sulfonic acid and CuSO in the step (1)4·5H2The molar ratio of O is (0.25-0.5): 1: (1-2), wherein the mass-volume ratio of the dodecylbenzene sulfonic acid to the dimethylbenzene to the water is 1 g: (1.5-2 mL): (4-4.5 mL), wherein the mass ratio of the aniline to the dodecylbenzene sulfonic acid to the ammonium persulfate in the ammonium persulfate solution is 1: (5-6): 1.
preferably, the functional monomer in the step (2) comprises side chain vinyl polysiloxane, and further comprises at least one of butyl acrylate, methyl methacrylate, styrene and acrylic acid, wherein the mass of the side chain vinyl polysiloxane accounts for 8-15% of the total mass of the functional monomer.
Preferably, in the step (2), the solid content of the polytetrafluoroethylene emulsion is 20-30%, and the total mass ratio of the polytetrafluoroethylene emulsion to the functional monomer is (2.5-3): 7, the added sodium bicarbonate accounts for 1-2% of the mass of the polytetrafluoroethylene emulsion, and the total mass of the ammonium persulfate accounts for 0.5-1% of the total mass of the functional monomer.
Preferably, the mass-to-volume ratio of the composite doped polyaniline to the mixed solvent in the step (3) is 1 g: (70-80 mL), the volume ratio of the mixed solvent of the cresol and the trichloromethane is (1-2): 1, the mass ratio of the composite doped polyaniline to the copolymer emulsion is (1-3): 1, and the mass of the added hydrochloric acid is 0.1-0.2% of that of the polyaniline.
Preferably, in the step (5), the electret charging time is 10-12 min, the charging distance is 5-7 cm, and the charging voltage is 10-15 kV.
Because the polyaniline has poor solubility and poor adhesion with polypropylene melt-blown non-woven fabrics, the film forming is influencedTherefore, the polyaniline is modified by the method of the invention, and the polyaniline is firstly modified by the step (1) of using citric acid, dodecylbenzene sulfonic acid and Cu2+The polyaniline is subjected to composite doping, the citric acid molecules are small, the dispersion is easy, the doping efficiency is high, and the carboxyl and hydroxyl in the polyaniline have strong hydrophilicity and can improve the solubility of the polyaniline; the dodecyl benzene sulfonic acid contains polar groups and nonpolar groups, has surface activation and template effects, and effectively improves the solubility of polyaniline in organic solvents after doping, so that the polyaniline can be dissolved in emulsion to cover the surface of the non-woven fabric fiber to form a film in a large area. And adding CuSO during doping4·5H2O, since polyaniline contains a large number of amino and imino groups in the molecular chain, for Cu2+Has good chelation, so the obtained composite doped polyaniline has a large amount of Cu on the surface2+So that the surface of the color-changeable layer of the protective mask contains a large amount of Cu2+And Cu2+The sterilization device has a good sterilization effect, can effectively kill germs adsorbed on the surface of the color-changeable layer, prevents external germs from entering the mouth or prevents germs in the mouth from entering the external environment, and plays a role in bidirectional protection.
Then, through the step (2), polytetrafluoroethylene modified polyacrylate copolymer emulsion is prepared by utilizing the reaction of polytetrafluoroethylene and functional monomers and is used as a binder, the polyacrylate copolymer emulsion can be covalently bonded with hydroxyl groups and the like on melt-blown non-woven fabric fibers, so that a firm film can be formed on the melt-blown non-woven fabric, and polysiloxane and polyacrylate copolymer are combined in the mask, so that a binder layer has good hydrophobicity, air permeability and weather resistance, and the service performance of the mask is improved; after the melt-blown non-woven fabric is covered with the adhesive, the charge quantity and the charge storage stability of the surface of the fiber material after electret treatment can be influenced, so that the color change effect of the color-changeable layer and the adsorption performance of pollution particles are influenced.
Dissolving the composite doped polyaniline with improved solubility in a chloroform and m-cresol solvent in the step (3), mixing the solution with a copolymer emulsion to obtain a finishing agent containing modified polyaniline and a binder, performing after-finishing on the melt-blown non-woven fabric by using the prepared finishing agent in the step (4), forming a film on the surface of the melt-blown non-woven fabric by using the finishing agent to obtain the melt-blown non-woven fabric covered with the modified polyaniline film, and finally performing corona charging on the melt-blown non-woven fabric covered with the modified polyaniline film in the step (5) to ensure that a variable color layer material has a large amount of charges and the modified polyaniline film is converted into an oxidized blue color. Therefore, the modified polyaniline film has good film forming property, good cohesiveness with polypropylene melt-blown non-woven fabrics, and good hydrophobicity and mechanical property of the film layer.
Preferably, the outer protective layer material is water-repellent spun-bonded non-woven fabric, and the inner moisture-absorbing layer material is hydrophilic spun-bonded non-woven fabric.
Preferably, the gram weight of the outer protective layer and the inner moisture absorption layer is 10-15 g/m2The gram weight of the color-changing layer is 20-30 g/m2。
Therefore, the invention has the following beneficial effects:
(1) the color-changeable layer is made of electret-treated polypropylene melt-blown non-woven fabric covered with a modified polyaniline film, the polypropylene melt-blown non-woven fabric is an electret material, the fiber surface can carry a large amount of static charges after the electret treatment, fine particles can be captured by utilizing the electrostatic adsorption effect, and the filtering and protecting effects of the mask can be enhanced; meanwhile, polyaniline is an electrochromic material, the modified polyaniline film is converted into oxidation state blue after electret treatment, the charges on the surface of the melt-blown non-woven fabric are gradually reduced along with the adsorption of particle pollutants when the mask is used, and the color of the modified polyaniline film can be gradually lightened, so that a warning effect can be realized through the color change of the color-changeable layer, whether the mask needs to be replaced or not is judged, and the protection effect of the mask is ensured;
(2) the preparation method comprises the steps of doping and modifying polyaniline by citric acid and dodecylbenzene sulfonic acid to improve the solubility of the polyaniline, and mixing the polyaniline with a polytetrafluoroethylene modified polyacrylate copolymer emulsion to serve as a finishing agent, wherein the polyacrylate copolymer emulsion improves the film forming property of the polyaniline and the cohesiveness between the polyaniline and melt-blown non-woven fabrics, and the polytetrafluoroethylene modification improves the surface charge amount and charge storage stability after the electret treatment of a film layer, so that the color change property of a color-changeable layer and the adsorption property of pollution particles are facilitated.
Detailed Description
The invention is further described with reference to specific embodiments.
Example 1:
the utility model provides a but color change protective facial mask, includes gauze mask body and ear area, and the gauze mask body is including being located the changeable colour layer in the middle and being located outer inoxidizing coating and the interior wet layer of absorption of changeable colour layer both sides respectively, and outer protective layer material is for refusing water spunbonded nonwoven, and the gram weight is 15g/m2The inner moisture absorption layer is made of hydrophilic spun-bonded non-woven fabric with the gram weight of 10g/m2The color-changing layer is made of polypropylene melt-blown non-woven fabric which is subjected to electret treatment and covered with a modified polyaniline film, and the gram weight of the color-changing layer is 25g/m2。
The preparation method of the color-changeable layer material comprises the following steps:
(1) mixing citric acid, dodecylbenzene sulfonic acid and CuSO4·5H2Mixing O, xylene and water, adding aniline after uniformly stirring, adding an ammonium persulfate solution with the mass fraction of 18% after cooling to 0 ℃, stirring for reacting for 40min, demulsifying with ethanol, filtering, washing and drying to obtain the composite doped polyaniline; citric acid, dodecylbenzene sulfonic acid and CuSO4·5H2The molar ratio of O is 0.3: 1: 1.5, the mass-volume ratio of the dodecylbenzene sulfonic acid to the dimethylbenzene and the water is 1 g: 1.8 mL: 4.3mL, wherein the mass ratio of aniline to dodecylbenzene sulfonic acid to ammonium persulfate in the ammonium persulfate solution is 1: 5.5: 1;
(2) adding sodium bicarbonate accounting for 1.5 percent of the mass of the polytetrafluoroethylene emulsion into the polytetrafluoroethylene emulsion with the solid content of 25 percent, adding functional monomers accounting for 1/5 of the total mass under stirring, soaking for 1.5h, then heating to 77 ℃, adding ammonium persulfate accounting for 1/5 of the total mass, reacting for 25min, dropwise adding the rest functional monomers and ammonium persulfate within 3h, keeping the temperature for reaction for 25min, heating to 88 ℃ for reaction for 1.5h, cooling, and then adjusting the pH to 7 by using ammonia water to obtain copolymer emulsion; the ratio of the total mass of the polytetrafluoroethylene emulsion to the total mass of the functional monomers is 2.8: 7, the functional monomer is side chain vinyl polysiloxane, butyl acrylate, methyl methacrylate, styrene and acrylic acid with the mass ratio of 1:3:2:2:2, and the total mass of the added ammonium persulfate is 0.8 percent of the total mass of the functional monomer;
(3) dissolving the composite doped polyaniline prepared in the step (1) in a mixed solvent of m-cresol and trichloromethane with a volume ratio of 1:1, wherein the mass volume ratio of the composite doped polyaniline to the mixed solvent is 1 g: 75mL, stirring for 24h, adding the copolymer emulsion prepared in the step (2) and hydrochloric acid, stirring and reacting for 35min to obtain a finishing agent, wherein the mass ratio of the composite doped polyaniline to the copolymer emulsion is 2:1, and the mass of the added hydrochloric acid is 0.15% of that of the polyaniline;
(4) finishing the polypropylene melt-blown non-woven fabric by using the prepared finishing agent by adopting a two-dipping and two-rolling method, and drying at 85 ℃ to obtain the melt-blown non-woven fabric covered with the modified polyaniline film;
(5) and carrying out corona charging electret treatment on the melt-blown non-woven fabric covered with the modified polyaniline film to obtain the material of the color-changeable layer, wherein the charging time is 11min, the charging distance is 6cm, and the charging voltage is 12 kV.
Example 2:
the utility model provides a but color change protective facial mask, includes gauze mask body and ear area, and the gauze mask body is including being located the changeable color layer in the middle and being located outer inoxidizing coating and the interior wet layer of absorption of changeable color layer both sides respectively, and outer protective layer material is for refusing water spunbonded nonwoven, and the gram weight is 10g/m2The inner moisture absorption layer is made of hydrophilic spun-bonded non-woven fabric with the gram weight of 15g/m2The color-changing layer is made of polypropylene melt-blown non-woven fabric which is subjected to electret treatment and covered with a modified polyaniline film, and the gram weight of the polypropylene melt-blown non-woven fabric is 20g/m2。
The preparation method of the color-changeable layer material comprises the following steps:
(1) mixing citric acid, dodecylbenzene sulfonic acid and CuSO4·5H2Mixing O, xylene and water, adding aniline after uniformly stirring, adding an ammonium persulfate solution with the mass fraction of 15% after cooling to 4 ℃, stirring for reaction for 30min, demulsifying with ethanol, filtering, washing and drying to obtain the composite doped polyaniline; citric acid, dodecylbenzene sulfonic acid and CuSO4·5H2The molar ratio of O is 0.25: 1:1, the mass volume ratio of the dodecylbenzene sulfonic acid to the dimethylbenzene to the water is 1 g: 1.5 mL: 4mL, wherein the mass ratio of aniline to dodecylbenzene sulfonic acid to ammonium persulfate in the ammonium persulfate solution is 1: 5: 1;
(2) adding sodium bicarbonate accounting for 1% of the mass of the polytetrafluoroethylene emulsion into the polytetrafluoroethylene emulsion with the solid content of 20%, adding a functional monomer accounting for 1/4 of the total mass under stirring, soaking for 1h, heating to 75 ℃, adding ammonium persulfate accounting for 1/4 of the total mass, reacting for 20min, dropwise adding the rest functional monomer and ammonium persulfate within 2h, reacting for 20min under heat preservation, heating to 85 ℃, reacting for 1h, cooling, and adjusting the pH to 6 by using ammonia water to obtain a copolymer emulsion; the ratio of the total mass of the polytetrafluoroethylene emulsion to the total mass of the functional monomers is 2.5: 7, the functional monomer is side chain vinyl polysiloxane, butyl acrylate, methyl methacrylate, styrene and acrylic acid with the mass ratio of 8:30:25:12:25, and the total mass of the added ammonium persulfate is 0.5 percent of the total mass of the functional monomer;
(3) dissolving the composite doped polyaniline prepared in the step (1) in a mixed solvent of m-cresol and trichloromethane with a volume ratio of 2:1, wherein the mass volume ratio of the composite doped polyaniline to the mixed solvent is 1 g: 70mL, stirring for 20h, adding the copolymer emulsion prepared in the step (2) and hydrochloric acid, stirring and reacting for 30min to obtain a finishing agent, wherein the mass ratio of the composite doped polyaniline to the copolymer emulsion is 1:1, and the mass of the added hydrochloric acid is 0.1% of that of the polyaniline;
(4) finishing the polypropylene melt-blown non-woven fabric by using the prepared finishing agent by adopting a two-dipping and two-rolling method, and drying at 80 ℃ to obtain the melt-blown non-woven fabric covered with the modified polyaniline film;
(5) and carrying out corona charging electret treatment on the melt-blown non-woven fabric covered with the modified polyaniline film to obtain the material of the color-changeable layer, wherein the charging time is 10min, the charging distance is 5cm, and the charging voltage is 10 kV.
Example 3:
the utility model provides a but color change protective facial mask, includes gauze mask body and ear area, and the gauze mask body is including being located the changeable color layer in the middle and being located outer inoxidizing coating and the interior wet layer of absorption of changeable color layer both sides respectively, and outer protective layer material is for refusing water spunbonded nonwoven, and the gram weight is 10g/m2The inner moisture absorption layer is made of hydrophilic spun-bonded non-woven fabric with the gram weight of 10g/m2The color-changing layer is made of polypropylene melt-blown non-woven fabric which is subjected to electret treatment and covered with a modified polyaniline film, and the gram weight of the polypropylene melt-blown non-woven fabric is 30g/m2。
The preparation method of the color-changeable layer material comprises the following steps:
(1) mixing citric acid, dodecylbenzene sulfonic acid and CuSO4·5H2Mixing O, dimethylbenzene and water, uniformly stirring, adding aniline, cooling to 0 ℃, adding an ammonium persulfate solution with the mass fraction of 20%, stirring for reacting for 60min, demulsifying with ethanol, filtering, washing and drying to obtain the composite doped polyaniline; citric acid, dodecylbenzene sulfonic acid and CuSO4·5H2The molar ratio of O is 0.5: 1, the mass volume ratio of the dodecylbenzene sulfonic acid to the dimethylbenzene to the water is 1 g: 2mL of: 4.5mL, wherein the mass ratio of aniline to dodecylbenzene sulfonic acid to ammonium persulfate in the ammonium persulfate solution is 1: 6: 1;
(2) adding sodium bicarbonate accounting for 2% of the mass of the polytetrafluoroethylene emulsion into the polytetrafluoroethylene emulsion with the solid content of 30%, adding a functional monomer accounting for 1/5 of the total mass under stirring, soaking for 2 hours, heating to 78 ℃, adding ammonium persulfate accounting for 1/5 of the total mass, reacting for 30 minutes, dropwise adding the rest functional monomer and ammonium persulfate within 4 hours, reacting for 30 minutes while keeping the temperature, heating to 90 ℃, reacting for 2 hours, cooling, and adjusting the pH to 8 by using ammonia water to obtain a copolymer emulsion; the ratio of the total mass of the polytetrafluoroethylene emulsion to the total mass of the functional monomer is 3: 7, the functional monomer is side chain vinyl polysiloxane, butyl acrylate, methyl methacrylate, styrene and acrylic acid with the mass ratio of 9:30:25:11:25, and the total mass of the added ammonium persulfate is 1 percent of the total mass of the functional monomer;
(3) dissolving the composite doped polyaniline prepared in the step (1) in a mixed solvent of m-cresol and trichloromethane with a volume ratio of 1.5:1, wherein the mass volume ratio of the composite doped polyaniline to the mixed solvent is 1 g: 80mL, stirring for 30h, adding the copolymer emulsion prepared in the step (2) and hydrochloric acid, stirring and reacting for 40min to obtain a finishing agent, wherein the mass ratio of the composite doped polyaniline to the copolymer emulsion is 3:1, and the mass of the added hydrochloric acid is 0.2% of that of the polyaniline;
(4) finishing the polypropylene melt-blown non-woven fabric by using the prepared finishing agent by adopting a two-dipping and two-rolling method, and drying at 90 ℃ to obtain the melt-blown non-woven fabric covered with the modified polyaniline film;
(5) and carrying out corona charging electret treatment on the melt-blown non-woven fabric covered with the modified polyaniline film to obtain the material of the color-changeable layer, wherein the charging time is 12min, the charging distance is 7cm, and the charging voltage is 15 kV.
Comparative example 1:
comparative example 1 is different from example 1 in that no polytetrafluoroethylene emulsion was added in step (2) of comparative example 1, and the rest is the same as in example 1.
The color-changeable layers of the protective masks prepared in the above examples and comparative examples were dark blue, 10 of each color-changeable layer was left in the air for 24 hours, and the color change of the color-changeable layer was observed; further, 10 of each of the samples were worn on a head model, and the head model was connected to a breathing simulator, and the color change of the color-changeable layer in the simulated breathing state was observed, and the results are shown in table 1.
Table 1: the color change condition of the color-changing layer of the protective mask.
| Numbering | Standing for 24h | Simulation ofRespiratory state |
| Example 1 | No obvious change in color | After 5.3h, the color becomes yellow green |
| Example 2 | No obvious change in color | Turns yellow-green after 4.5h |
| Example 3 | No obvious change in color | After 5.0h, the color becomes yellow-green |
| Comparative example 1 | Color lightening | After 2.7h, the color becomes yellow green |
As can be seen from table 1, the protective masks prepared by using the color-changeable layer material of the present invention in examples 1 to 3 have stable color-changeable layer and no obvious change in color when standing in air; under the simulated respiration state, the color of the color-changeable layer gradually changes from dark blue to yellow green within 4.5-5.3 h; the color-changeable mask can judge the adsorption condition through the color change of the color-changeable layer. The copolymer emulsion in the comparative example 1 is not modified by polytetrafluoroethylene, the color of the color-changeable layer becomes light after standing for 24 hours in the air, the color change speed is higher than that in the example 1 in the simulated breathing state, and probably because the charge storage stability of the film layer which is not modified by polytetrafluoroethylene after electret treatment is not as good as that of the film layer which is modified by polytetrafluoroethylene, the charge decay speed is high, and the adsorption performance of the mask is influenced.
Claims (9)
1. The color-changeable protective mask comprises a mask body and ear belts and is characterized in that the mask body comprises a color-changeable layer in the middle, an outer protective layer and an inner moisture absorption layer, wherein the outer protective layer and the inner moisture absorption layer are respectively arranged on two sides of the color-changeable layer, and the color-changeable layer is made of polypropylene melt-blown non-woven fabric which is subjected to electret treatment and is covered with a modified polyaniline film.
2. The variable color respirator of claim 1, wherein the variable color layer material is prepared by a process comprising the steps of:
(1) mixing citric acid, dodecylbenzene sulfonic acid and CuSO4·5H2Mixing O, dimethylbenzene and water, uniformly stirring, adding aniline, cooling to 0-4 ℃, adding an ammonium persulfate solution with the mass fraction of 15-20%, stirring for reaction for 30-60 min, demulsifying with ethanol, filtering, washing and drying to obtain the composite doped polyaniline;
(2) adding sodium bicarbonate into a polytetrafluoroethylene emulsion, adding a functional monomer accounting for 1/5-1/4 of the total mass under stirring, soaking for 1-2 hours, heating to 75-78 ℃, adding ammonium persulfate accounting for 1/5-1/4 of the total mass, reacting for 20-30 min, dropwise adding the rest functional monomer and ammonium persulfate within 2-4 hours, reacting for 20-30 min under heat preservation, heating to 85-90 ℃, reacting for 1-2 hours, cooling, and adjusting the pH to 6-8 with ammonia water to obtain a copolymer emulsion;
(3) dissolving the composite doped polyaniline prepared in the step (1) in a mixed solvent of m-cresol and trichloromethane, stirring for 20-30 h, adding the copolymer emulsion prepared in the step (2) and hydrochloric acid, and stirring for reacting for 30-40 min to obtain a finishing agent;
(4) finishing the polypropylene melt-blown non-woven fabric by using the prepared finishing agent by adopting a two-dipping and two-rolling method, and drying at 80-90 ℃ to obtain the melt-blown non-woven fabric covered with the modified polyaniline film;
(5) and carrying out corona charging electret treatment on the melt-blown non-woven fabric covered with the modified polyaniline film to obtain the color-changeable layer material.
3. The variable color respirator of claim 2, wherein the citric acid and dodecylbenzene sulfonic acid are used in step (1)With CuSO4·5H2The molar ratio of O is (0.25-0.5): 1: (1-2), wherein the mass-volume ratio of the dodecylbenzene sulfonic acid to the dimethylbenzene to the water is 1 g: (1.5-2 mL): (4-4.5 mL), wherein the mass ratio of the aniline to the dodecylbenzene sulfonic acid to the ammonium persulfate in the ammonium persulfate solution is 1: (5-6): 1.
4. the variable color protective mask according to claim 2, wherein the functional monomer in step (2) comprises side chain vinyl polysiloxane, and further comprises at least one of butyl acrylate, methyl methacrylate, styrene and acrylic acid, and the weight of the side chain vinyl polysiloxane accounts for 8-15% of the total weight of the functional monomer.
5. The color-changeable protective mask according to claim 2 or 4, wherein the solid content of the polytetrafluoroethylene emulsion in the step (2) is 20-30%, and the total mass ratio of the polytetrafluoroethylene emulsion to the functional monomer is (2.5-3): 7, the added sodium bicarbonate accounts for 1-2% of the mass of the polytetrafluoroethylene emulsion, and the total mass of the ammonium persulfate accounts for 0.5-1% of the total mass of the functional monomer.
6. The variable color protective mask according to claim 2, wherein the mass-to-volume ratio of the composite doped polyaniline to the mixed solvent in step (3) is 1 g: (70-80 mL), the volume ratio of the mixed solvent of the cresol and the trichloromethane is (1-2): 1, the mass ratio of the composite doped polyaniline to the copolymer emulsion is (1-3): 1, and the mass of the added hydrochloric acid is 0.1-0.2% of that of the polyaniline.
7. The variable color protective mask according to claim 2, wherein in the step (5), the electret charging time is 10 to 12min, the charging distance is 5 to 7cm, and the charging voltage is 10 to 15 kV.
8. The color-changeable protective mask according to claim 1, wherein the outer protective layer is made of water-repellent spun-bonded nonwoven fabric, and the inner moisture-absorbing layer is made of hydrophilic spun-bonded nonwoven fabric.
9. The variable color respirator according to claim 1 or 8, wherein the outer protective layer and the inner moisture absorbing layer have a grammage of 10 to 15g/m2The gram weight of the color-changing layer is 20-30 g/m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010313079.9A CN111557496A (en) | 2020-04-20 | 2020-04-20 | Color-changeable protective mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010313079.9A CN111557496A (en) | 2020-04-20 | 2020-04-20 | Color-changeable protective mask |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111557496A true CN111557496A (en) | 2020-08-21 |
Family
ID=72068961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010313079.9A Pending CN111557496A (en) | 2020-04-20 | 2020-04-20 | Color-changeable protective mask |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111557496A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112401346A (en) * | 2020-12-01 | 2021-02-26 | 江阴苏达汇诚复合材料有限公司 | Mask and preparation method thereof |
| ES2904574A1 (en) * | 2020-10-06 | 2022-04-05 | Modrono Freire Jose Luis | Facial mask support system and procedure (Machine-translation by Google Translate, not legally binding) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204132469U (en) * | 2014-09-16 | 2015-02-04 | 杭州韦尔茂通环境技术有限公司 | A kind of gauze mask containing anthocyanidin filter material |
| CN209361697U (en) * | 2018-10-31 | 2019-09-10 | 名典上品（北京）信息技术有限公司 | A kind of breather valve that can characterize mask pollution level and its applied mask |
-
2020
- 2020-04-20 CN CN202010313079.9A patent/CN111557496A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204132469U (en) * | 2014-09-16 | 2015-02-04 | 杭州韦尔茂通环境技术有限公司 | A kind of gauze mask containing anthocyanidin filter material |
| CN209361697U (en) * | 2018-10-31 | 2019-09-10 | 名典上品（北京）信息技术有限公司 | A kind of breather valve that can characterize mask pollution level and its applied mask |
Non-Patent Citations (2)
| Title |
|---|
| 朱道本等: "《有机固体》", 31 December 1999, 上海科学技术出版社 * |
| 陈曦: "熔喷聚丙烯驻极体空气净化材料应用过程中几个关键问题研究", 《硕士学位论文，杭州电子科技大学》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2904574A1 (en) * | 2020-10-06 | 2022-04-05 | Modrono Freire Jose Luis | Facial mask support system and procedure (Machine-translation by Google Translate, not legally binding) |
| CN112401346A (en) * | 2020-12-01 | 2021-02-26 | 江阴苏达汇诚复合材料有限公司 | Mask and preparation method thereof |
| CN112401346B (en) * | 2020-12-01 | 2023-09-05 | 江阴苏达汇诚复合材料有限公司 | Mask and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102697209B (en) | Efficient dust respirator and production method thereof | |
| CN111557496A (en) | Color-changeable protective mask | |
| CN107645916B (en) | It is built-in with the mask of adsorbed film | |
| CN112275031B (en) | Preparation method of melt-blown electret polymer filter material | |
| CN211935979U (en) | N95 filter core for antivirus | |
| CN110465134A (en) | A kind of novel composite filter material and preparation method thereof | |
| CN207225037U (en) | It is a kind of can long-acting negative ion release, antibacterial automobile air conditioner filter element | |
| CN209331226U (en) | A kind of Antimicrobial protective mask of high efficiency filter | |
| CN208975021U (en) | A kind of fireman's special double-layer filtermask | |
| CN104799450A (en) | Haze-preventing respirator and production method thereof | |
| CN109758831A (en) | The preparation method of high-efficiency air filtering material | |
| CN112089131B (en) | Color-changing fitting type mask | |
| CN214071894U (en) | Mask capable of effectively blocking PM0.3 nano-fiber | |
| CN212754361U (en) | Antibacterial and antiviral mask | |
| CN212754360U (en) | Novel antibacterial and antiviral mask | |
| CN204519415U (en) | A kind of nanofiber mouth mask for filtering PM2.5 particle | |
| CN207574568U (en) | A kind of haze mask | |
| KR20180003521U (en) | Dust shade and articles comprising the same | |
| CN111296933A (en) | Protective mask with self-cleaning function | |
| CN111631456A (en) | Composite protective and antivirus mask and preparation method thereof | |
| CN110959935A (en) | Integrated mask for chemical engineering experiments | |
| CN207322746U (en) | A kind of Novel anti-mist haze mask | |
| CN206620892U (en) | A kind of composite removes water smoke mouth mask | |
| CN215900771U (en) | Antifog haze gauze mask | |
| CN111411518B (en) | Antibacterial and anti-virus silk fiber filtering base cloth and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200821 |
|
| RJ01 | Rejection of invention patent application after publication |