CN103862988B - A kind of Nano Silver decoration veneer of antimildew and antibacterial - Google Patents
A kind of Nano Silver decoration veneer of antimildew and antibacterial Download PDFInfo
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Abstract
The present invention relates to field of nanometer material technology, particularly relate to a kind of Nano Silver decoration veneer of antimildew and antibacterial.It to be cohered through adhesive layer by fancy veneer and base material and forms, and fancy veneer and base material form through nano aqueous solution dipping, and adhesive layer contains nano-silver substances; Fancy veneer and base material are Recombinant Wood; Nano-silver water solution is solvent with deionized water, is that solute dissolves in deionized water, take acrylic resin as complexing agent, stabilizing agent dissolves in and add dispersant after in deionized water and the first reducing agent forms solution simultaneously with Nano Silver; The concentration of Nano Silver in adhesive is 75-150ppm; Flour mass content is in the solution 18-45%; The solids content that Environment-friendlyglue glue comprises 40-80 part weight is 40-55% is emulsion acrylic resin, the solids content of the acrylic resin powder of 20-40 part weight, 5-20 part weight is the EVA emulsion of 40-60%, 1-4 part dibutyl phthalate and 7-13 part weight chlorinated polypropylene or polyolefin substrate adhesion promoter.The Nano Silver decoration veneer stability of antimildew and antibacterial of the present invention and good dispersion; Fully can resist mould.
Description
Technical field
The present invention relates to field of nanometer material technology, particularly relate to a kind of Nano Silver decoration veneer of antimildew and antibacterial.
Background technology
Metal nano material is an important branch of nano material, and it for representative, wherein obtains maximum concerns because of the wide application prospect of Nano Silver with noble metal gold, silver, copper.Nano Silver can be used in a lot of aspect: in chemical fibre, add a small amount of Nano Silver, can improve some performance of chemical fibre product, and make it have very strong sterilizing ability; Adulterate appropriate Nano Silver in silicon oxide film, and the glass of this film of plating can be made to have certain Photoluminescence.Therefore Nano Silver all has broad application prospects in fields such as anti-biotic material, effective catalyst, lubricant, light absorbing material, coating, sensor, electrocondution slurry, high performance electrode materials, becomes and has the functional material theoretical research of property and the important topic of application and development.
The preparation of Nano Silver and improvement opportunity initial from nano anti-biotic material since just become the focus of researcher and developers' extensive concern.The preparation of Nano Silver is divided into Physical and chemical method.Chemical method has sol-gal process, galvanoplastic, oxidation-reduction method and vacuum vapour deposition etc.The most I of Argent grain prepared by chemical method reaches a few nanometer, simple to operate, easily controls.Shortcoming is that the Argent grain obtained not easily shifts and assembles, and easily comprises impurity, and easily assembles.Physical mainly vacuum evaporation, sputtering plating and ion plating etc.Wherein chemical reduction method is applied very well because required experiment condition is simple, energy-conservation.
CN200958280Y (2007-10-10) discloses a kind of decoration veneer containing Nano Silver, but this uses nano silver colloidal sol, fails to give full play to the antimildew and antibacterial effect of Nano Silver.
Summary of the invention
The first object of the present invention be to provide a kind of can effectively resist mould the Nano Silver decoration veneer of antimildew and antibacterial.
First technical purpose of the present invention is achieved by the following technical programs:
A Nano Silver decoration veneer for antimildew and antibacterial, to be cohered through adhesive layer by fancy veneer and base material and form, fancy veneer described in it and base material form through nano aqueous solution dipping, and described adhesive layer contains nano-silver substances; Described fancy veneer and base material are Recombinant Wood;
Described nano-silver water solution is solvent with deionized water, is that solute dissolves in deionized water, take acrylic resin as complexing agent, stabilizing agent dissolves in and add dispersant after in deionized water and the first reducing agent forms solution simultaneously with Nano Silver;
Described dispersant is triethanolamine, and described first reducing agent is the hydrazine hydrate aqueous solution;
The concentration of described Nano Silver is 50-150ppm, and described acrylic resin mass content is in the solution 1-10%;
Described Nano Silver is prepared from according to following steps:
(1) sodium dodecyl sulfate solution and polyoxyethylene alkyl ether sulfate salting liquid are added in silver nitrate aqueous solution and obtain mixed liquor, the mol ratio of described dodecyl sodium sulfate and silver nitrate is 2-3:1; The mol ratio of described polyoxyethylene alkyl ether sulfate salt and silver nitrate is 0.4-0.6:1;
(2) in described mixed liquor, add crown ether and contain alkali-metal second reducing agent, the mol ratio of described crown ether and silver nitrate is 1-2:1; The described mol ratio containing alkali-metal reducing agent and silver nitrate is 0.5-1:1, and control ph is 8-9, obtains Nano Silver;
The described adhesive containing inorganic nano-silver for Nano Silver is evenly applied in Environment-friendlyglue glue solution, using flour as the additive of glue;
The concentration of described Nano Silver in adhesive is 75-150ppm; Described flour mass content is in the solution 18-45%;
The solids content that described Environment-friendlyglue glue comprises 40-80 part weight is 40-55% is emulsion acrylic resin, the solids content of the acrylic resin powder of 20-40 part weight, 5-20 part weight is the EVA emulsion of 40-60%, 1-4 part dibutyl phthalate and 7-13 part weight chlorinated polypropylene or polyolefin substrate adhesion promoter;
Described emulsion acrylic resin is synthesized as monomer and emulsifying agent, ammonium persulfate initiator, sodium acid carbonate and deionized water by any one or a few in any one or a few in methyl methacrylate, EMA, butyl methacrylate, butyl acrylate, isobutyl methacrylate, dodecylacrylate, octadecyl acrylate and methacrylic acid, acrylic acid, acrylamide, acrylonitrile, Methacrylamide, styrene.
Advantage of the present invention is:
1. crown ether have hydrophobic external skeletal and hydrophilic can with the inner chamber of metal ion Cheng Jian, stable complex can be formed with alkali metal ion.Simultaneously; the present invention is engaged in follow-up reduction reaction and adds containing alkali-metal reducing agent; after adding above-mentioned reducing agent, crown ether and alkali metal ion form stable complex, make on the one hand free in reaction system or exposed reduction anion have higher reactivity; Meanwhile, after alkali metal and crown ether generation ligand complex, alkali metal cation is coated in inner chamber by crown ether, just pulls open the distance in Nano Silver system between positive and negative charge thus, make Nano Silver can stable dispersion in the aqueous solution, not easily reunite;
2. the Nano Silver decoration veneer of antimildew and antibacterial is mixed with by the combination of the dispersant of specific components and proportioning, the first reducing agent and stabilizing agent and Nano Silver solute, can not occur to reunite and particle growth in depositing, and can not be oxidized, stability and good dispersion;
3. pass through the particular combination of Environment-friendlyglue glue solution and Nano Silver, be mixed with the adhesive containing Nano Silver using flour as the additive of glue, can not occur to reunite and particle growth in depositing, and can not be oxidized, stability and good dispersion; Long cohesive can be kept; Add adhesion promoter, improve the compatibility between each component, after adhesive is long placed in, there will not be layering, and improve the adhesive force of glue to Recombinant Wood to be bonded to a great extent; Thus the shortcoming that extraneous moisture or humidity is deteriorated compared with glue performance in overall situation can be resisted; And this Environment-friendlyglue glue is without the need to Cord blood, store and convenient transportation;
4. be prepared into the Nano Silver needed for Nano Silver decoration veneer of preparation antimildew and antibacterial by specific method, nano-Ag particles is comparatively even, stable good with dispersive property, further increases the stability of the Nano Silver decoration veneer of final required antimildew and antibacterial.
As preferably, described dispersant mass content is in the solution 1-3%; Described first reducing agent content is in the solution 0.2-0.4%.
As preferably, described emulsifying agent is several in OPEO, sulfonated castor oil, lauryl sodium sulfate, neopelex.
As preferably, described is one or more in sodium borohydride, potassium borohydride, sodium metaphosphate or natrium citricum containing alkali-metal second reducing agent.
As preferably, the processing method of described fancy veneer is: sent in the vacuum tank containing nano-silver water solution by base material, is evacuated to vacuum for-0.05MPa ~-0.01MPa and keeps 15-20min; Then to exert pressure process, apply pressure to 0.2-0.5MPa and keep 18-28min; Finally carry out microwave treatment, microwave frequency is 400MHz ~ 650MHz, and microwave treatment time is 1 ~ 3min, then takes out post processing.
More preferred, described post processing is dry or hot pressing; Described hot pressing pressure is 0.5-1.4MPa, and hot pressing time is 1-5min.
As preferably, described step (2) adds crown ether and containing before alkali-metal second reducing agent, described mixed liquor is heated to 45-55 DEG C in described mixed liquor; Described step (2) adds crown ether and is heated to 70-85 DEG C, Keep agitation 5-8min containing after alkali-metal second reducing agent in described mixed liquor.
First heat and add crown ether again and contain alkali-metal second reducing agent, the reactivity of that dissociate in reaction system or exposed reduction anion can be increased, promote that alkali metal and crown ether generation ligand complex react, pull open the distance between positive and negative charge in Nano Silver system further, make Nano Silver can stable dispersion in the aqueous solution, not easily reunite;
In described mixed liquor, add crown ether and continue heating containing after alkali-metal second reducing agent, the reactivity of that dissociate in reaction system or exposed reduction anion can be increased further, promote that alkali metal and crown ether generation ligand complex react, pull open the distance between positive and negative charge in Nano Silver system further, make Nano Silver can stable dispersion in the aqueous solution, not easily reunite.
As preferably, described step (2) is carried out under microwave vacuum condition, and be specifically evacuated to vacuum for-0.02MPa ~-0.001MPa, then carry out microwave treatment, microwave frequency is 100MHz ~ 230MHz, and microwave treatment time is 3 ~ 7s.
Adopt microwave to carry out reaction and greatly can accelerate reaction rate, Reaction time shorten, improve the stability of nano-silver water solution further.
As preferably, described Nano Silver preparation also comprises step (3) ultrafiltration desalination and drying.
Ultrafiltration, except the inorganic salts generated in dereaction or organic salt, finally obtains the Nano Silver that particle size range is 20-60nm.
As preferably, described crown ether is bicyclohexane also-18-hat-6.
As preferably, the concrete grammar that fancy veneer and base material cohere is: fancy veneer and base material are cohered by the adhesive containing Nano Silver, and the glue-spread of the described adhesive containing Nano Silver is 80-150g/m
2; Then send in vacuum tank, be evacuated to vacuum and be-0.05MPa ~-0.01MPa and keep 15-20min; Then to exert pressure process, apply pressure to 0.2-0.5MPa and keep 18-28min; Then carry out microwave treatment, microwave frequency is 400MHz ~ 650MHz, and microwave treatment time is 1 ~ 3min; Finally take out and carry out colding pressing and hot pressing.
Vacuumized by continuous print, pressurize, carry out again colding pressing and hot pressing after microwave treatment, Nano Silver is effectively infiltrated in Recombinant Wood, fully resists because moisture-induced mould is to the invasion and attack of Recombinant Wood; Further enhancing adhesive, to the adhesive force of Recombinant Wood, improves gluing performance.
In sum, the present invention has following beneficial effect: nano-silver water solution stability of the present invention and good dispersion; Nano Silver can be made more effectively to infiltrate in Recombinant Wood decoration veneer, fully resist because moisture-induced mould is to the invasion and attack of Recombinant Wood.
Detailed description of the invention
embodiment one
The preparation of Nano Silver:
Sodium dodecyl sulfate solution and polyoxyethylene alkyl ether sulfate salting liquid are added in silver nitrate aqueous solution and obtain mixed liquor, the mol ratio of dodecyl sodium sulfate and silver nitrate is 2:1; The mol ratio of polyoxyethylene alkyl ether sulfate salt and silver nitrate is 2:5;
Mixed liquor is heated to 45 DEG C, in mixed liquor, adds bicyclohexane also-18-hat-6 and sodium borohydride under stirring, be heated to 70 DEG C, Keep agitation 5min; Bicyclohexane also-18-hat-6 is 1:1 with the mol ratio of silver nitrate; The mol ratio of sodium borohydride and silver nitrate is 0.5:1, and control ph is 8, obtains Nano Silver.
The preparation of nano-silver water solution:
Being solvent with deionized water, is that solute dissolves in deionized water with Nano Silver, is that complexing agent and stabilizing agent dissolve in and add dispersant after in deionized water and the first reducing agent forms solution simultaneously with acrylic resin;
Dispersant is triethanolamine, and mass content is in the solution 1%; First reducing agent is the hydrazine hydrate aqueous solution; Content is in the solution 0.2%;
The concentration of Nano Silver is 50ppm, and acrylic resin mass content is in the solution 1%.
The preparation of the adhesive containing inorganic nano-silver:
Nano Silver is evenly applied in Environment-friendlyglue glue solution, using flour as the additive of glue; The concentration of Nano Silver in adhesive is 75ppm; Flour mass content is in the solution 18%;
The solids content that Environment-friendlyglue glue comprises 40 parts of weight is 40% is emulsion acrylic resin, the acrylic resin powder of 20 parts of weight, the solids content of 5 parts of weight are the EVA emulsion of 40%, 1 part of dibutyl phthalate and 7 parts of weight chlorinated polypropylene or polyolefin substrate adhesion promoter;
Emulsion acrylic resin is synthesized as monomer and OPEO emulsifying agent, ammonium persulfate initiator, sodium acid carbonate and deionized water by methyl methacrylate and acrylamide.
By nano-silver water solution and the using method of adhesive for the preparation of decoration veneer containing inorganic nano-silver:
1. with veneer and the base material of nano aqueous solution dipping decoration Recombinant Wood material; Concrete dipping method is:
Veneer and base material are sent in the vacuum tank containing nano-silver water solution, is evacuated to vacuum and is-0.05MPaMPa and keeps 15min; Then to exert pressure process, apply pressure to 0.2MPa and keep 18min; Finally carry out microwave treatment, microwave frequency is 300MHz, and microwave treatment time is 1min, then takes out drying;
2. adopt the veneer after the adhesive bonding dipping containing nano-silver substances and base material,
The concrete grammar that fancy veneer and base material cohere is: fancy veneer and base material are cohered by the adhesive containing Nano Silver, then sends in vacuum tank, is evacuated to vacuum and is-0.05MPa and keeps 15min; Then to exert pressure process, apply pressure to 0.2MPa and keep 18min; Then carry out microwave treatment, microwave frequency is 400MHz, and microwave treatment time is 1min; Finally take out and carry out colding pressing and hot pressing; Pressure of colding pressing is 0.7MPa, and the time of colding pressing is 0.5h; Hot pressing pressure is 0.5MPa, and hot pressing time is 1min.Glue-spread wherein containing the adhesive of Nano Silver is 80g/m
2.
The decoration veneer that the present embodiment obtains reaches the highest 0 grade of JISZ2911 standard after testing, decorates the popularity bacillus in room, food Trichoderma, stain fungus etc. have stronger killing action.
embodiment two
The preparation of Nano Silver:
Sodium dodecyl sulfate solution and polyoxyethylene alkyl ether sulfate sodium solution are added in silver nitrate aqueous solution and obtain mixed liquor, the mol ratio of dodecyl sodium sulfate and silver nitrate is 3:1; The mol ratio of polyoxyethylene alkyl ether sulfate salt and silver nitrate is 3:5;
Mixed liquor is heated to 55 DEG C, in mixed liquor, adds bicyclohexane also-18-hat-6 and potassium borohydride under stirring, be heated to 85 DEG C, Keep agitation 8min; Bicyclohexane also-18-hat-6 is 1-2:1 with the mol ratio of silver nitrate; The mol ratio of potassium borohydride and silver nitrate is 0.5-1:1, and control ph is 8-9, obtains Nano Silver.
The preparation of nano-silver water solution:
Being solvent with deionized water, is that solute dissolves in deionized water with Nano Silver, is that complexing agent and stabilizing agent dissolve in and add dispersant after in deionized water and reducing agent forms solution simultaneously with acrylic resin;
Dispersant is triethanolamine, and mass content is in the solution 1-3%; First reducing agent is the hydrazine hydrate aqueous solution; Content is in the solution 0.2-0.4%;
The concentration of Nano Silver is 50-150ppm, and acrylic resin mass content is in the solution 1-10%.
The preparation of the adhesive containing Nano Silver:
Nano Silver is evenly applied in Environment-friendlyglue glue solution, using flour as the additive of glue; The concentration of Nano Silver in adhesive is 150ppm; Flour mass content is in the solution 45%;
The solids content that Environment-friendlyglue glue comprises 80 parts of weight is 55% is emulsion acrylic resin, the acrylic resin powder of 40 parts of weight, the solids content of 20 parts of weight are the EVA emulsion of 60%, 4 parts of dibutyl phthalates and 13 parts of weight chlorinated polypropylene or polyolefin substrate adhesion promoter;
Emulsion acrylic resin is synthesized as monomer and sulfonated castor oil emulsifying agent, ammonium persulfate initiator, sodium acid carbonate and deionized water by dodecylacrylate, octadecyl acrylate and Methacrylamide, styrene.
By nano-silver water solution and the using method of adhesive for the preparation of decoration veneer containing inorganic nano-silver:
1. with veneer and the base material of nano aqueous solution dipping decoration Recombinant Wood material; Concrete dipping method is: veneer and base material are sent in the vacuum tank containing nano-silver water solution, is evacuated to vacuum and is-0.05MPa ~-0.01MPa and keeps 15-20min; Then to exert pressure process, apply pressure to 0.2-0.5MPa and keep 18-28min; Finally carry out microwave treatment, microwave frequency is 300MHz ~ 950MHz, and microwave treatment time is 1 ~ 3min, then takes out drying;
Adopt the veneer after the adhesive bonding dipping containing nano-silver substances and base material, the concrete grammar that fancy veneer and base material cohere is: fancy veneer and base material are cohered by the adhesive containing Nano Silver, then send in vacuum tank, be evacuated to vacuum and be-0.01MPa and keep 20min; Then to exert pressure process, apply pressure to 0.5MPa and keep 28min; Then carry out microwave treatment, microwave frequency is 650MHz, and microwave treatment time is 3min; Finally take out and carry out colding pressing and hot pressing; Pressure of colding pressing is 0.6MPa, and the time of colding pressing is 3h; Hot pressing pressure is 1.4MPa, and hot pressing time is 5min.Glue-spread wherein containing the adhesive of Nano Silver is 150g/m
2;
The decoration veneer that the present embodiment obtains reaches the highest 0 grade of JISZ2911 standard after testing, decorates the popularity bacillus in room, food Trichoderma, stain fungus etc. have stronger killing action.
embodiment three
The preparation of Nano Silver:
Sodium dodecyl sulfate solution and polyoxyethylene alkyl ether sulfate sodium solution are added in silver nitrate aqueous solution and obtain mixed liquor, the mol ratio of dodecyl sodium sulfate and silver nitrate is 2.5:1; The mol ratio of polyoxyethylene alkyl ether sulfate salt and silver nitrate is 1:2;
Mixed liquor is heated to 50 DEG C, in mixed liquor, adds bicyclohexane also-18-hat-6 and sodium metaphosphate under stirring, be heated to 75 DEG C, Keep agitation 6min; Bicyclohexane also-18-hat-6 is 1.5:1 with the mol ratio of silver nitrate; The mol ratio of sodium metaphosphate and silver nitrate is 0.8:1, and control ph is 8.5, obtains Nano Silver.
The preparation of nano-silver water solution:
Being solvent with deionized water, is that solute dissolves in deionized water with Nano Silver, is that complexing agent and stabilizing agent dissolve in and add dispersant after in deionized water and reducing agent forms solution simultaneously with acrylic resin;
Dispersant is triethanolamine, and mass content is in the solution 2%; First reducing agent is the hydrazine hydrate aqueous solution; Content is in the solution 0.3%;
The concentration of Nano Silver is 100ppm, and acrylic resin mass content is in the solution 8%.
The preparation of the adhesive containing inorganic nano-silver:
Nano Silver is evenly applied in Environment-friendlyglue glue solution, using flour as the additive of glue; The concentration of Nano Silver in adhesive is 100ppm; Flour mass content is in the solution 25%;
The solids content that Environment-friendlyglue glue comprises 60 parts of weight is 45% is emulsion acrylic resin, the acrylic resin powder of 30 parts of weight, the solids content of 15 parts of weight are the EVA emulsion of 50%, 3 parts of dibutyl phthalates and 9 parts of weight chlorinated polypropylene or polyolefin substrate adhesion promoter;
Emulsion acrylic resin is synthesized as monomer and neopelex emulsifying agent, ammonium persulfate initiator, sodium acid carbonate and deionized water by butyl acrylate, isobutyl methacrylate and octadecyl acrylate and acrylonitrile and Methacrylamide.
By nano-silver water solution and the using method of adhesive for the preparation of decoration veneer containing inorganic nano-silver:
1. with veneer and the base material of nano aqueous solution dipping decoration Recombinant Wood material; Concrete dipping method is: sent in the vacuum tank containing nano-silver water solution by Recombinant Wood, is evacuated to vacuum and is-0.03MPa and keeps 18min; Then to exert pressure process, apply pressure to 0.3MPa and keep 23min; Finally carry out microwave treatment, microwave frequency is 550MHz, and microwave treatment time is 2min, then takes out drying;
Adopt the veneer after the adhesive bonding dipping containing nano-silver substances and base material, the concrete grammar that fancy veneer and base material cohere is: fancy veneer and base material are cohered by the adhesive containing Nano Silver, then send in vacuum tank, be evacuated to vacuum and be-0.04MPa and keep 18min; Then to exert pressure process, apply pressure to 0.3MPa and keep 22min; Then carry out microwave treatment, microwave frequency is 550MHz, and microwave treatment time is 2min; Finally take out and carry out colding pressing and hot pressing; Pressure of colding pressing is 0.8MPa, and the time of colding pressing is 1.5h; Hot pressing pressure is 1MPa, and hot pressing time is 4min.Glue-spread wherein containing the adhesive of Nano Silver is 110g/m
2.
The decoration veneer that the present embodiment obtains reaches the highest 0 grade of JISZ2911 standard after testing, decorates the popularity bacillus in room, food Trichoderma, stain fungus etc. have stronger killing action.
embodiment four
The preparation of Nano Silver:
Sodium dodecyl sulfate solution and polyoxyethylene alkyl ether sulfate sodium solution are added in silver nitrate aqueous solution and obtain mixed liquor, the mol ratio of dodecyl sodium sulfate and silver nitrate is 2:1; The mol ratio of polyoxyethylene alkyl ether sulfate salt and silver nitrate is 2:5;
In mixed liquor, add bicyclohexane also-18-hat-6 and natrium citricum, bicyclohexane also-18-hat-6 is 1:1 with the mol ratio of silver nitrate; The mol ratio of natrium citricum and silver nitrate is 0.5:1, control ph is 8, put into microwave vacuum tank to process under microwave vacuum condition, specifically be evacuated to vacuum for-0.02MPa, carry out microwave treatment again, microwave frequency is 100MHz, and microwave treatment time is 3s, then ultrafiltration desalination is also dry, finally obtains the Nano Silver that particle size range is 20-60nm.
The preparation of nano-silver water solution and adhesive and using method thereof, with embodiment one, are synthesized as monomer and lauryl sodium sulfate emulsifying agent, ammonium persulfate initiator, sodium acid carbonate and deionized water by butyl methacrylate and acrylamide unlike emulsion acrylic resin.
embodiment five
The preparation of Nano Silver:
Sodium dodecyl sulfate solution and polyoxyethylene alkyl ether sulfate sodium solution are added in silver nitrate aqueous solution and obtain mixed liquor, the mol ratio of dodecyl sodium sulfate and silver nitrate is 3:1; The mol ratio of polyoxyethylene alkyl ether sulfate salt and silver nitrate is 3:5;
In mixed liquor, add bicyclohexane also-18-hat-6 and the sodium borohydride that combines of 1:1 and potassium borohydride in molar ratio, bicyclohexane also-18-hat-6 is 1-2:1 with the mol ratio of silver nitrate; The mol ratio of sodium borohydride and potassium borohydride and silver nitrate is 1:1, control ph is 9, put into microwave vacuum tank to process under microwave vacuum condition, specifically be evacuated to vacuum for-0.001MPa, carry out microwave treatment again, microwave frequency is 230MHz, and microwave treatment time is 7s, then ultrafiltration desalination is also dry, finally obtains the Nano Silver that particle size range is 20-60nm.
The preparation of nano-silver water solution and adhesive and using method thereof are with embodiment two.
embodiment six
The preparation of Nano Silver:
Sodium dodecyl sulfate solution and polyoxyethylene alkyl ether sulfate sodium solution are added in silver nitrate aqueous solution and obtain mixed liquor, the mol ratio of dodecyl sodium sulfate and silver nitrate is 2.5:1; The mol ratio of polyoxyethylene alkyl ether sulfate salt and silver nitrate is 1:2;
In mixed liquor, add bicyclohexane also-18-hat-6 and the potassium borohydride that combines of 1:1 and sodium metaphosphate in molar ratio, bicyclohexane also-18-hat-6 is 1.5:1 with the mol ratio of silver nitrate; The mol ratio of potassium borohydride and sodium metaphosphate and silver nitrate is 0.8:1, control ph is 8.5, put into microwave vacuum tank to process under microwave vacuum condition, specifically be evacuated to vacuum for-0.01MPa, carry out microwave treatment again, microwave frequency is 130MHz, and microwave treatment time is 5s, then ultrafiltration desalination is also dry, finally obtains the Nano Silver that particle size range is 20-60nm.
The preparation of nano-silver water solution and using method thereof are with embodiment three.
comparing embodiment one
The preparation of Nano Silver:
Added in silver nitrate aqueous solution by sodium dodecyl sulfate solution and obtain mixed liquor, the mol ratio of dodecyl sodium sulfate and silver nitrate is 1:1;
In mixed liquor, sodium borohydride is added, Keep agitation 5min under stirring; The mol ratio of sodium borohydride and silver nitrate is 2:1, and control ph is 10, obtains Nano Silver.
The preparation of nano-silver water solution:
Being solvent with water, is that solute dissolves in water with Nano Silver, is that complexing agent and stabilizing agent dissolve in and add dispersant triethanolamine after in water simultaneously and form solution with acrylic resin;
Triethanolamine mass content is in the solution 1%; Content is in the solution 0.2%;
The concentration of Nano Silver is 40ppm, and acrylic resin mass content is in the solution 0.5%.
Embodiment 1-6 and comparative example are left standstill, observe the dispersity of the Nano Silver of nano-silver water solution system after 1 month and 6 months respectively, observed result is in table 1.
The dispersity of Nano Silver in table 1 nano-silver water solution system
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this description, as long as but be all subject to the protection of Patent Law in right of the present invention.
Claims (8)
1. a Nano Silver decoration veneer for antimildew and antibacterial, to be cohered through adhesive layer by fancy veneer and base material and forms, it is characterized in that:
Described fancy veneer and base material form through nano-silver water solution dipping, and described adhesive layer contains nano-silver substances; Described fancy veneer and base material are Recombinant Wood;
Described nano-silver water solution is solvent with deionized water, is that solute dissolves in deionized water, take acrylic resin as complexing agent, stabilizing agent dissolves in and add dispersant after in deionized water and the first reducing agent forms solution simultaneously with Nano Silver;
Described dispersant is triethanolamine, and described first reducing agent is the hydrazine hydrate aqueous solution;
The concentration of described Nano Silver is 50-150ppm, and described acrylic resin mass content is in the solution 1-10%;
Described Nano Silver is prepared from according to following steps:
(1) sodium dodecyl sulfate solution and polyoxyethylene alkyl ether sulfate salting liquid are added in silver nitrate aqueous solution and obtain mixed liquor, the mol ratio of described dodecyl sodium sulfate and silver nitrate is 2-3:1; The mol ratio of described polyoxyethylene alkyl ether sulfate salt and silver nitrate is 0.4-0.6:1;
(2) in described mixed liquor, add crown ether and contain alkali-metal second reducing agent, the mol ratio of described crown ether and silver nitrate is 1-2:1; The described mol ratio containing alkali-metal reducing agent and silver nitrate is 0.5-1:1, and control ph is 8-9, obtains Nano Silver;
Described step (2) adds crown ether and containing before alkali-metal second reducing agent, described mixed liquor is heated to 45-55 DEG C in described mixed liquor; Described step (2) adds crown ether and is heated to 70-85 DEG C, Keep agitation 5-8min containing after alkali-metal second reducing agent in described mixed liquor;
The described adhesive containing inorganic nano-silver for Nano Silver is evenly applied in Environment-friendlyglue glue solution, using flour as the additive of glue;
The concentration of described Nano Silver in adhesive is 75-150ppm; Described flour mass content is in the solution 18-45%;
The solids content that described Environment-friendlyglue glue comprises 40-80 part weight is 40-55% is emulsion acrylic resin, the solids content of the acrylic resin powder of 20-40 part weight, 5-20 part weight is the EVA emulsion of 40-60%, 1-4 part dibutyl phthalate and 7-13 part weight chlorinated polypropylene or polyolefin substrate adhesion promoter;
Described emulsion acrylic resin is synthesized as monomer and emulsifying agent, ammonium persulfate initiator, sodium acid carbonate and deionized water by any one or a few in any one or a few in methyl methacrylate, EMA, butyl methacrylate, butyl acrylate, isobutyl methacrylate, dodecylacrylate, octadecyl acrylate and methacrylic acid, acrylic acid, acrylamide, acrylonitrile, Methacrylamide, styrene.
2. the Nano Silver decoration veneer of a kind of antimildew and antibacterial according to claim 1, it is characterized in that: the processing method of described fancy veneer is: fancy veneer is sent in the vacuum tank containing nano-silver water solution, be evacuated to vacuum and be-0.05MPa ~-0.01MPa and keep 15-20min; Then to exert pressure process, apply pressure to 0.2-0.5MPa and keep 18-28min; Finally carry out microwave treatment, microwave frequency is 400MHz ~ 650MHz, and microwave treatment time is 1 ~ 3min, then takes out post processing.
3. the Nano Silver decoration veneer of a kind of antimildew and antibacterial according to claim 1, it is characterized in that: the concrete grammar that fancy veneer and base material cohere is: fancy veneer and base material are cohered by the adhesive containing Nano Silver, the glue-spread of the described adhesive containing Nano Silver is 80-150g/m
2, then send in vacuum tank, be evacuated to vacuum and be-0.05MPa ~-0.01MPa and keep 15-20min; Then to exert pressure process, apply pressure to 0.2-0.5MPa and keep 18-28min; Then carry out microwave treatment, microwave frequency is 400MHz ~ 650MHz, and microwave treatment time is 1 ~ 3min; Finally take out and carry out colding pressing and hot pressing.
4. the Nano Silver decoration veneer of a kind of antimildew and antibacterial according to claim 1, is characterized in that: described dispersant mass content is in the solution 1-3%; Described first reducing agent content is in the solution 0.2-0.4%; Described is one or more in sodium borohydride, potassium borohydride, sodium metaphosphate or natrium citricum containing alkali-metal second reducing agent.
5. the Nano Silver decoration veneer of a kind of antimildew and antibacterial according to any one of claim 1-4, is characterized in that: described emulsifying agent is several in OPEO, sulfonated castor oil, lauryl sodium sulfate, neopelex.
6. the Nano Silver decoration veneer of a kind of antimildew and antibacterial according to claim 5, it is characterized in that: described step (2) is carried out under microwave vacuum condition, specifically be evacuated to vacuum for-0.02MPa ~-0.001MPa, carry out microwave treatment again, microwave frequency is 100MHz ~ 230MHz, and microwave treatment time is 3 ~ 7s.
7. the Nano Silver decoration veneer of a kind of antimildew and antibacterial according to claim 6, is characterized in that: described crown ether is bicyclohexane also-18-hat-6.
8. the Nano Silver decoration veneer of a kind of antimildew and antibacterial according to claim 7, is characterized in that: described Nano Silver preparation also comprises step (3) ultrafiltration desalination and drying.
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