CN104452309A - Method for making conductive fabric through polyaniline-triggered chemical slivering - Google Patents
Method for making conductive fabric through polyaniline-triggered chemical slivering Download PDFInfo
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- CN104452309A CN104452309A CN201410852953.0A CN201410852953A CN104452309A CN 104452309 A CN104452309 A CN 104452309A CN 201410852953 A CN201410852953 A CN 201410852953A CN 104452309 A CN104452309 A CN 104452309A
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Abstract
The invention relates to a method for making conductive fabric through polyaniline-triggered chemical slivering. Fabric is soaked in a mixed solution of aniline and protonic acid, ammonium persulfate is added to the mixed solution, a reaction is carried out for 2-10 hours, and then the processed fabric is obtained after washing; the processed fabric is soaked in a silver nitrate solution, washed, dried, and then soaked in a silvering solution for being silvered for 30-60 min at the temperature of 30-40 DEG C, then the processed fabric is washed and dried, and finally the conductive fabric is obtained. According to the method, the process conditions of sensitization and activation are omitted, polyaniline and silver nitrate replace stannous chloride and palladium chloride high in price, cost is lowered, and environment pollution is reduced. The conductive fabric obtained through the method is good in conductivity, the binding strength of metal and fabric is high, the electromagnetic shielding performance is excellent, and the conductive fabric has an antistatic function, an antibacterial function and the like.
Description
Technical field
The invention belongs to the preparation field of conductive fabric, particularly a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering.
Background technology
Along with the development of science and technology, electronic technology product has been deep into the life of people and the various aspects of production, in order to improve service efficiency, often transmitting power is increasing, the problem of electromagenetic wave radiation is also following, anti-electromagnetic radiation fabric shields electromagnetic wave mainly through reflection consume and absorption consume two kinds of modes, and wherein reflection mode realizes mainly through fabric face metal level, and absorption pattern mainly realizes with conductive polymer polymer.Processing method in conjunction with conducting polymer and metal conducting layer will have more advantage, the conductive spinning product prepared through the method can be used for preparing livewire work clothes, electromagnetic shielding protective clothing, secret room wall paper and curtain, precision instrument radome and movable shielding tent etc., also has excellent electric conductivity and anti-microbial property.
The method obtaining metal conducting layer has Vacuum Deposition, coating, plating and chemical plating etc., wherein the fabric metal level of chemical plating process and the coherent of main fibre good, substantially maintain feel and the flexibility of fiber, and textile process performance is good, electromagnet shield effect is strong.But the process steps of conventional fabrics chemical plating process is various, usually need to carry out the pre-treatment step such as oil removing, alligatoring, sensitization, activation to fabric, its main purpose improves electroless plating fabric surface roughness, thus strengthen the adhesion of matrix and coating, form catalytic active center at fabric face simultaneously, impel the carrying out of self-catalyzed reaction.Wherein sensitization the fabric of alligatoring is put into sensitizing solution stannous chloride flood, and tin salt hydrolysis generates stannous hydroxide or stannous oxide and is deposited on fiber, thus lay a good foundation for activation processing.In activation processing, activator is generally precious metal salt plating metal to catalytic activity, the conventional colloidal solution having palladium bichloride or chlorauride.When activating, stannous ion is reduced into Metal Palladium particle the palladium ion in activating solution, deposits and forms catalysis nucleus, electroless plating reaction is accelerated at fabric face.In the patent of invention 201210365690.1 " the fastness protection of dacron chemical silvering silver plating liquid, its silver-coating method and coating thereof " of Zhang Huiru, Feng Yali, sensitizing solution consists of: 10 ~ 30g/L stannous chloride, 20mL/L concentrated hydrochloric acid, and activating solution consists of: 0.2 ~ 0.4g/L palladium bichloride, 4mL/L concentrated hydrochloric acid; In the patent of invention 201210469286.9 " a kind of chemical plating silver method of fabric " of Zhan Jianchao, Zhang Hui, sensitization activating solution has used stannous chloride and palladium bichloride equally.Wherein stannous chloride poisonous and harmful, can to environment; Palladium salt belongs to noble metal, with high costs.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering, silver coating fabric excellent conductivity prepared by the present invention, and technique is simple, alleviates environmental pollution, reduces cost simultaneously.
A kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering of the present invention, comprising:
(1) utilize the method for in-situ polymerization to generate one deck polyaniline film at fabric face: to be flooded in the mixed solution of aniline and Bronsted acid by fabric, add ammonium persulfate, reaction 2-10h, washing, obtain the fabric after processing;
(2) flooded in liquor argenti nitratis ophthalmicus by the fabric after above-mentioned process, washing, after room temperature is dried, then immerses in silver plating liquid, and under 30-40 DEG C of condition, plating 30-60min, washing, dries, obtain conductive fabric.
In described step (1), fabric is synthetic fiber, blend fibre or natural fabric.
Described synthetic fiber are the one in polyamide fibre, terylene, acrylic fibers; Natural fabric is the one in cotton, wool, silk.
In the mixed solution of the middle aniline of described step (1) and Bronsted acid, the concentration of aniline is 0.1-0.5mol/L, and the concentration of Bronsted acid is 0.2-0.8mol/L.
In described step (1), Bronsted acid is one or more in nitric acid, phosphoric acid, citric acid, DBSA.
In described step (1), dipping temperature is 25 DEG C; Time is 20-50min.
In described step (1), the concentration of ammonium persulfate in reactant liquor is 0.1-0.5mol/L.
In described step (2), the concentration of liquor argenti nitratis ophthalmicus is 4-10g/L, and in liquor argenti nitratis ophthalmicus, dipping temperature is 20-50 DEG C, and dip time is 2-10h.
Silver plating liquid is that the silver ammino solution of 1:2 ~ 1:5 and reducing solution form by volume ratio in described step (2).
Described silver ammino solution is: 10-30g/L AgNO
3, drip ammoniacal liquor to clarification; Reducing solution is: glucose 20-80g/L, tartaric acid 0.05-5g/L, ethanol 100-300mL/L, ethylenediamine 10-30mL/L.
The electromagnet shield effect of conductive fabric: 38 ~ 50dB, namely fabric can reach 38 ~ 50dB to the shielding electromagnetic waves performance of frequency in the scope of 300MHz ~ 3GHz.
The present invention, first at fabric face in-situ polymerization polyaniline, then utilizes the reducibility of polyaniline by silver ion reduction, causes the nucleus of chemical plating after formation.Polyaniline conventional in conducting polymer is made up of reduction unit and oxidation unit.The content of these two kinds of construction units is different, and correspond to the polyaniline state of oxidation in various degree, these states of oxidation can transform mutually.
Polyaniline molecule structural formula:
polyaniline is made up of reduction unit and oxidation unit two parts, and y (0≤y≤1) is for characterizing the redox condition of polyaniline, and n is construction unit number (degree of polymerization).Y gets the different redox state that different numerical value correspond to polyaniline, and y value is less, and polyaniline reducibility is stronger.When y gets suitable numerical value time, silver ion reduction can be elemental silver by polyaniline, and its reaction equation is:
The present invention has certain reducibility through the polyaniline of protonic acid doping, can be silver-colored simple substance by silver ion reduction in the solution.The present invention is in-situ preparation one deck polyaniline on fabric first, and then utilize its reducibility by silver ion reduction, silver ion is deposited on fabric, form active centre, thus the chemical plating after causing.
The present invention instead of stannous chloride and palladium salt with polyaniline and silver nitrate in chemical plating pre-treatment, reduces cost, decreases environmental pollution.
beneficial effect
The present invention compares with conventional method, the silver-plated preliminary treatment of traditional chemical uses stannous chloride sensitization and the activation of palladium salt usually, environmental pollution is larger, and cost is higher, the present invention proposes the polyaniline film at fabric face in-situ polymerization one deck with reducibility, then utilizes its reducibility, by silver ion reduction, be deposited on fabric face, form the chemical plating after catalysis nucleation; Adopt method process fabric provided by the invention and chemical silvering, the silver coating fabric excellent conductivity of preparation, sheet resistance 1-5 Ω/sq, and technique is simple, alleviates environmental pollution, reduces cost simultaneously;
Conductive fabric electric conductivity prepared by the present invention is good, and the binding strength of metal and fabric is high, and capability of electromagnetic shielding is excellent, and has the functions such as antistatic, antibacterial.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
In the present invention, embodiment shield effectiveness all adopts DR-913 testing anti-electromagnetic radiation function of fabrics instrument, normative reference GB/T25471 " the shield effectiveness measuring method of electromagnetic screen coating " and SJ20524 " method of testing of Materials ' Shielding Effectiveness " test.
The adhesion of the coat of metal and fabric fibre adopts conductive fabric industry conventional " adhesive tape method of testing " to measure.
Fabric antistatic property YG (B) 342E type fabric induction type static charge tester measures.
Antibacterial fabric performance adopts standard GB/T/T 20944.3-2008 succusion test.
Embodiment 1
(1) prepare the mixed solution of aniline and Bronsted acid, wherein aniline 0.2mol/L, hydrochloric acid 0.4mol/L, put into textile impregnation 40min, then add ammonium persulfate, makes ammonium persulfate concentrations in solution be 0.2mol/L, and polymerization 2h, takes out and fully wash.
(2) compound concentration is the liquor argenti nitratis ophthalmicus of 8g/L, and under 20 DEG C of conditions, dipping has been polymerized the fabric 2h of one deck polyaniline, takes out washing, dries.
(3) first silver ammino solution is prepared: 10g/L AgNO
3, drip ammoniacal liquor to clarification; Prepare reducing solution again: glucose 20g/L, tartaric acid 0.05g/L, ethanol 100mL/L, ethylenediamine 10mL/L.
Be that 1:2 mixes by silver ammino solution and reducing solution with volume ratio, be mixed with chemical plating liquid.Immerse fabric, carry out chemical silvering at 40 DEG C, plating 60min, washing, dry, the chemical silvering fabric that namely obtained electric conductivity is good.
After recording plating, fabric properties characterizes as following table:
Anti-microbial property is as follows:
Embodiment 2
(1) prepare the mixed solution of aniline and Bronsted acid, wherein aniline 0.3mol/L, hydrochloric acid 0.6mol/L, put into textile impregnation 30min, then add ammonium persulfate, makes ammonium persulfate concentrations in solution be 0.3mol/L, and polymerization 2h, takes out and fully wash.
(2) compound concentration is the liquor argenti nitratis ophthalmicus of 10g/L, and under 50 DEG C of conditions, dipping has been polymerized the fabric 3h of one deck polyaniline, takes out washing, dries.
(3) first silver ammino solution is prepared: 10g/L AgNO
3, drip ammoniacal liquor to clarification; Prepare reducing solution again: glucose 20g/L, tartaric acid 0.05g/L, ethanol 100mL/L, ethylenediamine 10mL/L.
Be that 1:3 mixes by silver ammino solution and reducing solution with volume ratio, be mixed with chemical plating liquid.Immerse fabric, carry out chemical silvering at 40 DEG C, plating 50min, washing, dry, the chemical silvering fabric that namely obtained electric conductivity is good.
Record fabric property as follows:
After recording plating, fabric properties characterizes as following table:
Anti-microbial property is as follows:
Claims (10)
1. utilize polyaniline to cause a preparation method for the conductive fabric of chemical silvering, comprising:
(1) fabric is flooded in the mixed solution of aniline and Bronsted acid, add ammonium persulfate, reaction 2-10h, washing, obtain the fabric after processing;
(2) flooded in liquor argenti nitratis ophthalmicus by the fabric after above-mentioned process, washing, after drying, then immerses in silver plating liquid, and under 30-40 DEG C of condition, plating 30-60min, washing, dries, obtain conductive fabric.
2. a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering according to claim 1, is characterized in that: in described step (1), fabric is synthetic fiber, blend fibre or natural fabric.
3. a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering according to claim 2, is characterized in that: described synthetic fiber are the one in polyamide fibre, terylene, acrylic fibers; Natural fabric is the one in cotton, wool, silk.
4. a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering according to claim 1, it is characterized in that: in the mixed solution of the middle aniline of described step (1) and Bronsted acid, the concentration of aniline is 0.1-0.5mol/L, and the concentration of Bronsted acid is 0.2-0.8mol/L.
5. a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering according to claim 1, is characterized in that: in described step (1), Bronsted acid is one or more in nitric acid, phosphoric acid, citric acid, DBSA.
6. a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering according to claim 1, is characterized in that: in described step (1), dipping temperature is 25 DEG C; Time is 20-50min.
7. a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering according to claim 1, is characterized in that: in described step (1), the concentration of ammonium persulfate in reactant liquor is 0.1-0.5mol/L.
8. a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering according to claim 1, it is characterized in that: in described step (2), the concentration of liquor argenti nitratis ophthalmicus is 4-10g/L, in liquor argenti nitratis ophthalmicus, dipping temperature is 20-50 DEG C, and dip time is 2-10h.
9. a kind of preparation method of conductive fabric utilizing polyaniline to cause chemical silvering according to claim 1, is characterized in that: in described step (2), silver plating liquid is that the silver ammino solution of 1:2 ~ 1:5 and reducing solution form by volume ratio.
10. a kind of preparation method utilizing polyaniline to cause the conductive fabric of chemical silvering according to claim 9, is characterized in that: described silver ammino solution is: 10-30g/L AgNO
3, drip ammoniacal liquor to clarification; Reducing solution is: glucose 20-80g/L, tartaric acid 0.05-5g/L, ethanol 100-300mL/L, ethylenediamine 10-30mL/L.
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| CN105734979A (en) * | 2016-03-15 | 2016-07-06 | 绍兴文理学院 | Processing process and equipment of conductive PTT yarn |
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| CN105780493A (en) * | 2016-04-19 | 2016-07-20 | 东华大学 | Making method of cotton fabric having conductive and electromagnetic shielding properties |
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