CN102838385A - Antibacterial ceramic coating of non-stick pan, preparation method and non-stick pan thereof - Google Patents
Antibacterial ceramic coating of non-stick pan, preparation method and non-stick pan thereof Download PDFInfo
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- CN102838385A CN102838385A CN2012103752326A CN201210375232A CN102838385A CN 102838385 A CN102838385 A CN 102838385A CN 2012103752326 A CN2012103752326 A CN 2012103752326A CN 201210375232 A CN201210375232 A CN 201210375232A CN 102838385 A CN102838385 A CN 102838385A
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Abstract
The invention relates to an antibacterial ceramic coating of a non-stick pan, a preparation method and a non-stick pan thereof. The antibacterial ceramic coating comprises the following components: silver, aluminum oxide and silica, wherein the weight ratio of the silver to the aluminum oxide to the silica is 4.4-6.5: 10-13: 22-30. The preparation method comprises the following steps of: by taking absolute ethyl alcohol as a co-flux and adding acid liquor as a catalyst, forming silica sol through hydrolysis and polycondensation of alkoxysilane, uniformly dispersing two reactants into gel of a silica nanometer network structure by utilizing reaction among silver nitrate, aluminum nitrate and silica, carrying out solid-phase reaction between the two reactants through high-temperature burning, and synthesizing complex phase ceramic material powder. The preparation method, provided by the invention, is scientific and reasonable, simple and easy to implement, and convenient for application, the prepared antibacterial ceramic coating has the advantages of good mechanical property, high intensity, scratch resistance, antibiosis, no toxicity and environmental friendliness, and conforms to requirements of safety, health, energy conservation, green and environmental friendliness of the current international environmental group and nation.
Description
Technical field
The present invention relates to a kind of non-sticking cooking utensils, specifically, relate to a kind of anti-bacteria ceramic coating, preparation method and non-stick pan thereof of non-stick pan.
Background technology
People use traditional metal pan (cast iron, stainless steel, aluminium and duraluminum) cooking food always for a long time, but the sticking pot of food phenomenon takes place in cooking process often.This has not only destroyed the food profile, and the food of sticking pot takes place by burnt paste the easily, even produces objectionable impurities, influences HUMAN HEALTH.Also increased cooker in addition and scrubbed difficulty, made troubles to culinary art.Therefore non-stick pan since invention with regard to because its be prone to clean, can easily fry in shallow oil, cooked food and non-stick pan can reduce oil smoke to greatest extent, meet people in modern to pursue green food the performance of lower fat, needs low in calories and enjoy liking of masses.
But the non-stick pan of existing market main flow all is the non-viscous paint that relies on surface spraying one strata fluorine type resin; Rely on the characteristic of its strong-hydrophobicity and low-friction coefficient; Realize what food did not glue; It can satisfy the requirement that the sticking pot of food does not take place in people's cooking process really, but also there are many defectives in it.The intensity that at first is polytetrafluorethylecoatings coatings is relatively poor, comes off easily and damages, and can take place softeningly in the cooking process, can only use the wood shovel, can not cook harder food; This non-stick pan also should not be cooked acidic food simultaneously, otherwise can influence the work-ing life of non-stick pan; The use temperature of polytetrafluorethylecoatings coatings generally can not surpass 250 ℃ in addition, and people are difficult to strict control in use, damage because of dry combustion method easily.In use whether exist harm also to have dispute for the polytetrafluorethylecoatings coatings non-stick pan always, constantly cause controversial issue HUMAN HEALTH; In case and non-viscous paint comes off, will cause viscosity not can reduction greatly.
Along with the rise of Chinese kitchen guarding's revolution, " safe, healthy, energy-conservation, green, environmental protection " etc. becomes the main flow that enjoys human consumer's extensive concern and 2l century kitchen guarding revolution development.The improvement of auxiliary facilities such as kitchen water, electricity, gas, oneself becomes the bright spot and the focus of cooker industry the development of antibacterial environment protection cooker.See that on the whole antibacterial non-stick pan market still is in the stage at the early-stage in China's family kitchen at present.According to investigations, the owning rate of urban family is also very low, not enough l%, and the rural area is in blank basically.Therefore, energy-conservationization of cooker product, robotization, intellectuality, attractive in appearanceization will be the another development trends of cooker industry.
Nano silver particles has very strong sterilizing ability, and existing at present a lot of reports add nano silver particles in the mixture, give the report of mixture anti-microbial property.Based on the demand, the present invention provides anti-bacteria ceramic coating of a kind of non-stick pan and preparation method thereof.
Summary of the invention
The purpose of this invention is to provide anti-bacteria ceramic coating of a kind of non-stick pan and preparation method thereof.
The anti-bacteria ceramic coating of non-stick pan of the present invention comprises following components in part by weight: silver: aluminium sesquioxide: silicon-dioxide is 4.4-6.5:10-13:22-30.
The thickness of the anti-bacteria ceramic coating of non-stick pan of the present invention is 10-50 μ m; Preferred 20-30 μ m.
The present invention also provides the preparation method of the anti-bacteria ceramic coating of above-mentioned non-stick pan.
Anti-bacteria ceramic coating production of the present invention, carry out according to following steps successively:
1) with Silver Nitrate, aluminum nitrate and water according to (7-10): (75-90): weight ratio (180-220) is mixed, and fully dissolving becomes solution;
2) tetraethoxy, absolute ethyl alcohol and zero(ppm) water are according to (80-100): (20-40): weight ratio (20-40) is mixed with hydrating solution;
3) with above-mentioned solution and hydrating solution thorough mixing, and add acid, regulate its pH value, stirred 2-3 hour, be placed on gel under the 60-90 ℃ of isoperibol then for 1-3 as catalyzer;
4) place 150-200 ℃ of loft drier dry in colloid behind the gel, calcining makes composite ceramic material then, and calcining temperature 1100-1200 ℃, soaking time 1.5-3 hour;
5) composite ceramic material is added be made into slip in the zero(ppm) water, be coated in the non-stick pan matrix surface, handled 1.5-3 hour down, handle obtaining composite ceramic coat in 1-2 hour at 350-450 ℃ through 600-900 ℃.
Wherein: it is pure that Silver Nitrate, aluminum nitrate and tetraethoxy are branch, and the weight content of Silver Nitrate >=99.0%, aluminum nitrate are the analytical pure compound with 9 crystal water, weight content >=99.0%; The weight content of tetraethoxy >=98.0%, Silver Nitrate can also use other lithium compounds to replace, and aluminum nitrate can be replaced by other aluminium salt.
The present invention is the reaction that utilizes between Silver Nitrate, aluminum nitrate and the silicon-dioxide, and silicon-dioxide is to introduce with the form of tetraethoxy, in the reaction with absolute ethyl alcohol as congruent melting agent; Add acid solution as catalyzer, through hydrolysis, the polycondensation formation silicon dioxide gel of silicon alkoxide, because colloidal sol is the nanometer network structure; Two kinds of reactants are dispersed in the gel, the solid state reaction between two kinds of reactants take place, synthetic diphase ceramic material powder through high-temperature calcination; Its uniform particles, particle diameter are between 1 ~ 200 nanometer, and be highly stable under air and common atmosphere; Because metal content is high; The thermal conductivity of this diphase ceramic material powder is better, has good heat-resistance property, wear resistance and solidity to corrosion simultaneously, is suitable as very much the coated material of non-stick pan.
In the step 3), described acid can be adopted mineral acid commonly used, example hydrochloric acid, sulfuric acid etc., the preferred 0.1-2mol/l of its volumetric molar concentration, more preferably 0.1-0.5mol/l; The concentration of acid is lower, and the particle diameter of the diphase ceramic material powder of preparation is less;
In the step 5), said coating is carried out as follows: slip is sprayed or evenly spread upon the non-stick pan the bottom of a pan; The area of said coating is preferably the 20-80% of the bottom of a pan area.
Said base material can be selected the frying pan material used always, like aluminium, iron, stainless steel etc.
Detect through test, the coated material performance index that the present invention obtains are following: room temperature bending strength σ=40～60Mr, linear expansivity (0.8-1.1) * 10
-6/ ℃, the material water-intake rate behind the coating sintering is 0.2-0.9%, frictional coefficient is 0.2-0.3.
Preparing method of the present invention is scientific and reasonable; Simple, to be convenient to implement, the coated material of acquisition has replaced existing Teflon non-viscous paint; Not only has the good mechanical performance; Intensity is high, and also anti-stroke, antibiotic, asepsis environment-protecting meet the requirement of current international environment tissue and national " safe, healthy, energy-conservation, green, the environmental protection " that is proposed more.
Embodiment
Below in conjunction with specific embodiment the present invention is described further.Specialize like nothing, the used raw material of the present invention is commercial.
Embodiment 1
The various raw materials that adopt comprise that Silver Nitrate, aluminum nitrate and tetraethoxy etc. are analytical pure.
Earlier 74 gram Silver Nitrates, 1000 ml distilled waters, 20 milliliters of nitric acid are dissolved jointly, in solution, add 750 gram aluminum nitrates, add 1200 ml waters again it is dissolved fully, be mixed with the clear solution for standby; Take by weighing 840 gram tetraethoxys, again to wherein adding 200 ml waters, 200 milliliters of absolute ethyl alcohols, 5 milliliters of nitric acid fully stir to such an extent that hydrating solution is subsequent use, and recording the pH value is 2; With clear solution and hydrating solution thorough mixing; Under 80 ℃ of temperature of homothermic magnetic stirring apparatus, solution was fully reacted 3 hours; And gel, the colloid behind the gel placed 150 ℃ of thermostatic drying chamber finish-dryings after, 1100 ℃ of calcining insulations 2 hours are synthetic in retort furnace.
Then the synthetic composite ceramic material is added in the zero(ppm) water, behind ball milling, be made into ceramic slurry and be coated in iron non-stick pan matrix surface, handled 3 hours down through 900 ℃, handle obtaining composite ceramic coat in 2 hours at 450 ℃, its coat-thickness is 27 μ m.Coating is smooth, the basic uniformity of color, opacifying power and gloss, and no bubble does not come off.Meet the non-stick pan standard.
Embodiment 2
Each raw material that adopts comprises that Silver Nitrate, aluminum nitrate and tetraethoxy etc. are analytical pure.
Earlier 80 gram Silver Nitrates, 1000 ml distilled waters, 20 milliliters of nitric acid are dissolved jointly, in solution, add 800 gram aluminum nitrates, add 1200 ml waters again it is dissolved fully, be mixed with the clear solution for standby; Take by weighing 1000 gram tetraethoxys, again to wherein adding 400 ml waters, 400 milliliters of absolute ethyl alcohols, 7 milliliters of nitric acid, after fully stirring hydrating solution is subsequent use, recording the pH value is 1.8; With clear solution and hydrating solution thorough mixing; Solution was fully reacted 3 hours and gel; After colloid behind the gel placed 200 ℃ of thermostatic drying chamber finish-dryings, 1200 ℃ of calcining insulations 1.5 hours were synthetic in retort furnace.
Then the synthetic composite ceramic material is added in the zero(ppm) water, behind ball milling, be made into ceramic slurry and be coated in aluminium non-stick pan matrix surface, handled 1.5 hours down through 600 ℃, handle obtaining composite ceramic coat in 1 hour at 350 ℃, its coat-thickness is 28 μ m.Coating is smooth, the basic uniformity of color, opacifying power and gloss, and no bubble does not come off.Meet the non-stick pan standard.
Embodiment 3
Earlier 100 gram Silver Nitrates, 1000 ml distilled waters, 20 milliliters of nitric acid are dissolved jointly, in solution, add 900 gram aluminum nitrates, add 800 ml waters again it is dissolved fully, be mixed with the clear solution for standby; Take by weighing 1000 gram tetraethoxys, again to wherein adding 300 ml waters, 300 milliliters of absolute ethyl alcohols, 7 milliliters of nitric acid, after fully stirring hydrating solution is subsequent use, recording the pH value is 1.6; With clear solution and hydrating solution thorough mixing; Under 90 ℃ of temperature of homothermic magnetic stirring apparatus, solution was fully reacted 2 hours; And gel, the colloid behind the gel placed 180 ℃ of thermostatic drying chamber finish-dryings after, 1150 ℃ of calcining insulations 3 hours are synthetic in retort furnace.
Then composite ceramic material is added and behind ball milling, be made into slip in the zero(ppm) water, be coated in iron non-stick pan matrix surface, handled 3 hours down, handle obtaining composite ceramic coat in 2 hours at 400 ℃ through 800 ℃.Its coat-thickness is 30 μ m.Coating is smooth, the basic uniformity of color, opacifying power and gloss, and no bubble does not come off.Meet the non-stick pan standard.
The anti-bacteria ceramic coating of embodiment 1-3 preparation is detected, and the result sees table 1.
Table l, Performance Detection table
| Project | Linear expansivity 10 -6／℃ | Water-intake rate % | Frictional coefficient | Bending strength MPa |
| Embodiment 1 | 0.8 | 0.6 | 0.3 | 40 |
| Embodiment 2 | 1.0 | 0.2 | 0.3 | 52 |
| Embodiment 3 | 1.1 | 0.6 | 0.27 | 47 |
The print of the anti-bacteria ceramic coating of embodiment 1-3 preparation is carried out antibacterial test.Before carrying out antibacterial test, earlier with print with 50 ℃ of poach 16 hours, the test bacterial classification is intestinal bacteria (Escherichia coli) ATCC25922 and streptococcus aureus (Staphylococcusaureus) ATCC6538.
Concrete steps are following: testing sample handled with 75% ethanol disinfection and dried, and bacterial classification is subsequent use with the bacteria suspension that sterilized water is diluted to proper concn.The bacteria suspension of getting 0.2mL drops in sample surfaces, and (4.0cm * 4.0cm) cover on it makes bacteria suspension between sample and film, form uniform liquid film with the thick polyvinylidene film of 0.1mm.Keep relative humidity 90% to cultivate 18～24 hours at 37 ℃.With sterilized water bacterium liquid is washed, be diluted to suitable concentration gradient, get 0.1mL and be uniformly coated on the aseptic nutrient agar that has prepared.Cultivated observations 18～24 hours in 37 ℃.Negative control replaces with aseptic plate, and other operations are identical, and the antibacterium rate is calculated by the formula that provides in the standard, the antibiotic rate result such as the table 2 that obtain:
The antibacterial effect of each embodiment of table 2
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Intestinal bacteria suppress effect | 90.2 | 91.3 | 88.3 |
| Streptococcus aureus suppresses effect | 89.4 | 93.7 | 92.6 |
Obviously; Utilize the antimicrobial coating material of preparing method's preparation of the present invention not only to have the good mechanical performance; Intensity is high, and also anti-stroke, antibiotic, asepsis environment-protecting meet the requirement of current international environment tissue and national " safe, healthy, energy-conservation, green, the environmental protection " that is proposed more.
Claims (10)
1. the anti-bacteria ceramic coating of a non-stick pan is characterized in that, comprises following components in part by weight: silver: aluminium sesquioxide: silicon-dioxide is 4.4-6.5:10-13:22-30.
2. anti-bacteria ceramic coating as claimed in claim 1 is characterized in that, the thickness of said anti-bacteria ceramic coating is 10-50 μ m; Preferred 20-30 μ m.
3. according to claim 1 or claim 2 the preparation method of anti-bacteria ceramic coating is characterized in that, carries out according to following steps successively:
1) with Silver Nitrate, aluminum nitrate and water according to (7-10): (75-90): weight ratio (180-220) is mixed, and fully dissolving becomes solution;
2) tetraethoxy, absolute ethyl alcohol and zero(ppm) water are according to (80-100): (20-40): weight ratio (20-40) is mixed with hydrating solution;
3) with above-mentioned solution and hydrating solution thorough mixing, and add acid, regulate its pH value, stirred 2-3 hour, be placed on gel under the 60-90 ℃ of isoperibol then for 1-3 as catalyzer;
4) place 150-200 ℃ of loft drier dry in colloid behind the gel, calcining makes composite ceramic material then, and calcining temperature 1100-1200 ℃, soaking time 1.5-3 hour;
5) composite ceramic material is added be made into slip in the zero(ppm) water, be coated in the non-stick pan matrix surface, handled 1.5-3 hour down, handle obtaining composite ceramic coat in 1-2 hour at 350-450 ℃ through 600-900 ℃.
4. preparation method as claimed in claim 3 is characterized in that, in the step 3), described acid is hydrochloric acid, the vitriolic mineral acid.
5. preparation method as claimed in claim 4 is characterized in that, the volumetric molar concentration of said mineral acid is 0.1-2mol/l.
6. like claim 4 or 5 described preparing methods, it is characterized in that the volumetric molar concentration of said mineral acid is 0.1-0.5mol/l.
7. preparation method as claimed in claim 3 is characterized in that, in the step 5), said coating is carried out as follows: slip is sprayed or spread upon the non-stick pan the bottom of a pan.
8. preparation method as claimed in claim 7 is characterized in that, the area of said coating is the 20-80% of the bottom of a pan area.
9. like the described preparation method of claim 3,7 or 8, it is characterized in that said base material is aluminium, iron or stainless steel.
10. non-stick pan that comprises claim 1 or 2 described anti-bacteria ceramic coatings.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103483885A (en) * | 2013-09-29 | 2014-01-01 | 陈春水 | Antibacterial corrosion-resistant ceramic coating of non-stick pan and preparation method of coating |
| CN104688001A (en) * | 2013-12-07 | 2015-06-10 | 元海莲 | Stainless steel ceramic non-stick pan and production method thereof |
| CN104688050A (en) * | 2013-12-07 | 2015-06-10 | 元海莲 | Stainless steel ceramic non-stick pan |
| CN105330200A (en) * | 2015-11-30 | 2016-02-17 | 无锡大塘复合材料有限公司 | Crack-resistant high-toughness non-stick paint |
| CN105348951A (en) * | 2015-11-30 | 2016-02-24 | 无锡大塘复合材料有限公司 | High-wear-resisting non-stick paint and application thereof |
| CN107713708A (en) * | 2016-08-12 | 2018-02-23 | 武汉苏泊尔炊具有限公司 | Anti-corrosion pan and preparation method thereof |
| CN108065788A (en) * | 2016-11-11 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | A kind of antibacterial non-stick material and preparation method thereof and antibacterial non-stick cookware |
| CN108618570A (en) * | 2017-03-20 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | The control method of cooking apparatus and cooking apparatus |
| CN114318335A (en) * | 2022-01-04 | 2022-04-12 | 四川中久国峰科技有限公司 | Wear-resistant non-stick ceramic coating material, preparation method and application thereof, and die cutting tool |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103483885A (en) * | 2013-09-29 | 2014-01-01 | 陈春水 | Antibacterial corrosion-resistant ceramic coating of non-stick pan and preparation method of coating |
| CN103483885B (en) * | 2013-09-29 | 2016-05-18 | 陈春水 | Antibacterial wearable ceramic coat of a kind of non-stick pan and preparation method thereof |
| CN104688001A (en) * | 2013-12-07 | 2015-06-10 | 元海莲 | Stainless steel ceramic non-stick pan and production method thereof |
| CN104688050A (en) * | 2013-12-07 | 2015-06-10 | 元海莲 | Stainless steel ceramic non-stick pan |
| CN105330200A (en) * | 2015-11-30 | 2016-02-17 | 无锡大塘复合材料有限公司 | Crack-resistant high-toughness non-stick paint |
| CN105348951A (en) * | 2015-11-30 | 2016-02-24 | 无锡大塘复合材料有限公司 | High-wear-resisting non-stick paint and application thereof |
| CN107713708A (en) * | 2016-08-12 | 2018-02-23 | 武汉苏泊尔炊具有限公司 | Anti-corrosion pan and preparation method thereof |
| CN108065788A (en) * | 2016-11-11 | 2018-05-25 | 佛山市顺德区美的电热电器制造有限公司 | A kind of antibacterial non-stick material and preparation method thereof and antibacterial non-stick cookware |
| CN108618570A (en) * | 2017-03-20 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | The control method of cooking apparatus and cooking apparatus |
| CN108618570B (en) * | 2017-03-20 | 2020-11-06 | 佛山市顺德区美的电热电器制造有限公司 | Cooking appliance and control method thereof |
| CN114318335A (en) * | 2022-01-04 | 2022-04-12 | 四川中久国峰科技有限公司 | Wear-resistant non-stick ceramic coating material, preparation method and application thereof, and die cutting tool |
| CN114318335B (en) * | 2022-01-04 | 2023-09-12 | 四川中久国峰科技有限公司 | Wear-resistant non-stick ceramic coating material, preparation method and application thereof, and die cutting tool |
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Application publication date: 20121226 |