CN1189502C - Method for preparing fusible conductive polyaniline - Google Patents
Method for preparing fusible conductive polyaniline Download PDFInfo
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- CN1189502C CN1189502C CNB021452946A CN02145294A CN1189502C CN 1189502 C CN1189502 C CN 1189502C CN B021452946 A CNB021452946 A CN B021452946A CN 02145294 A CN02145294 A CN 02145294A CN 1189502 C CN1189502 C CN 1189502C
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- polyaniline
- acid
- water
- macromole
- solubility promoter
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Abstract
The present invention discloses a method for preparing fusible and conductive polyaniline, which mainly comprises the steps: eigenstate polyaniline and macromolecule functional protonic acid are hot mixed in mixed solvents comprising water and cosolvents. The preparing method has the advantages of less environment pollution, simple manufacturing process, high yield and easy industrialization production, and obtained products have the advantages of good solubility, high thermal stability and good conductive performance.
Description
Technical field
The present invention relates to a kind of conducting polymer composite preparation method, specifically, relate to a kind of preparation method of conducting polyaniline material.
Background technology
In numerous conducting polymer composites, the conducting polymer composite that polyaniline is cheap and easy to get with mechanism of doping effect, excellent physical chemistry and the raw material of its structure variation, uniqueness, preparation technology simply is considered to have most application prospect.
Polyaniline in eigenstate is not had electroconductibility, and it just has electroconductibility after must mixing with other material.Consider that the material workability after the doping is a solubility, using more dopant at present is the organic protonic acid of macromole, its adulterating method mainly contains two classes: (one) uses the emulsion synthesis method, and is promptly synthetic in the organic proton acid system of water-dimethylbenzene-macromole.This method needs a large amount of organic solvent and precipitation agent, has both improved cost, contaminate environment again, and productive rate is lower simultaneously.(2) be to prepare polyaniline in eigenstate earlier, again with the organic protonic acid doping of macromole, but traditional doping method adopts both direct mixing and dopings or mixes in organic solvent, if adopt polyaniline in eigenstate and the direct mixing and doping of the organic protonic acid of macromole, both are difficult to mix, cause the Polyaniline Doped degree inhomogeneous, the doping weak effect; Mix in organic solvent if adopt, the organic protonic acid of part breaks away from the polyaniline main chain, separately exists in unbound state and does not play the doping effect in the organic solvent, so the poor stability of products therefrom, doping efficiency is low, simultaneously contaminate environment.Aforesaid method all is difficult to carry out suitability for industrialized production.Therefore we think that the preparation of soluble conductive polyaniline is improved so far as yet and solve.
Summary of the invention
The objective of the invention is to overcome the shortcoming in the existing soluble conductive method for preparing polyaniline, provide that a kind of technology is simple, productive rate is high, environmental pollution is little, be easy to suitability for industrialized production, and product has the electrically conductive polyaniline preparation method of good solubility, thermostability and electroconductibility.
Technical scheme:
Electrically conductive polyaniline preparation method of the present invention places water and secondary solvent mixing solutions to mix polyaniline in eigenstate and the organic protonic acid of macromole, and its key step is as follows:
With polyaniline in eigenstate, concentration is that the mixed solvent that the organic protonic acid of 0.05-2N macromole and water and solubility promoter are formed places reactor, stirs 1～24 hour down at 40～100 ℃.Promptly get the soluble conductive polyaniline after filtration, washing, the drying.
Wherein: described polyaniline in eigenstate adopts prior art for preparing, does not repeat them here; The organic protonic acid of described macromole is camphorsulfonic acid, Witco 1298 Soft Acid, hexadecyl Phenylsulfonic acid or naphthene sulfonic acid, and the aniline unit molar ratio in itself and the polyaniline is 0.5～2; Described solubility promoter is to dissolve each other with water and can increase the aprotic organic solvent of the organic protonic acid of macromole solubleness in water, as ethanol, butanols, N, and dinethylformamide (DMF), dimethyl sulfoxide (DMSO) (DMSO) or 1-Methyl-2-Pyrrolidone (NMP); The mass ratio of water and solubility promoter is 95-70: 5-30 in the mixed solvent.
Specific implementation method
(1) polyaniline in eigenstate preparation
At first, aniline monomer, inorganic acid aqueous solution and oxygenant being placed polymeric kettle, is that solvent carries out polymerization with water.Polymeric reaction temperature is-5～40 ℃, and polymerization reaction time is 1～24 hour, behind the stopped reaction, polymerisate after filtration, the washing after blackish green pressed powder.
Wherein: described mineral acid is H
2SO
4, HCl, H
3PO
4, HClO
4, HBr, HF or HBF
4Described oxygenant is K
2S
2O
8, (NH
4)
2S
2O
8, H
2O
2, KMnO
4, FeCl
3, K
2Cr
2O
7Or KClO
3The concentration of aniline is 0.3～3.0N, and the concentration of mineral acid is 0.4～4.0N; The molar ratio of mineral acid and aniline is 1.0～5.0; The molar ratio of oxygenant and aniline is 0.5～2.0.
Secondly, blackish green powder with ammonia treatment 1～48 hour, is filtered, wash to pH value be 7, obtain polyaniline in eigenstate.
(2) preparation of soluble conductive polyaniline
With polyaniline in eigenstate, concentration is that (mass ratio of water and solubility promoter is 95-70: 5-30) place reactor, stirred 1-24 hour down at 40-100 ℃ for the organic protonic acid of 0.05-2N macromole, water and solubility promoter.Promptly get the soluble conductive polyaniline after filtration, washing, the drying.
Wherein: the organic protonic acid of described macromole is hexadecyl Phenylsulfonic acid or naphthene sulfonic acid, and the aniline unit molar ratio in itself and the polyaniline is 0.5～2; Described solubility promoter is butanols, DMF, DMSO or NMP.
The present invention compared with prior art has following advantage: (1) the inventive method has overcome low, the shortcomings such as aftertreatment technology is complicated, contaminate environment, cost height of existing emulsion synthesis method gained polyaniline productive rate, provides a kind of and provides that a kind of technology is simple, productive rate is high, environmental pollution is little, cost is low, has been easy in the aqueous solution of suitability for industrialized production the synthetic and thermal response of chemical oxidation and mixed to combine and prepare the method for lyotropic polyaniline; (2) the inventive method employing water is main doped dielectric, and hot doping under 40～100 ℃ of temperature for improving the solvability of macromolecule organic acid in water, is introduced a certain amount of solubility promoter, and this makes and mixes reaction evenly, doping level height, product Heat stability is good.The doping reaction that has overcome existing doping techniques existence is inhomogeneous, doping weak effect, the shortcoming that the product thermostability is bad; (3) lyotropic polyaniline that adopts the inventive method to prepare, its solvability, productive rate, thermostability, electric conductivity all are better than the prepared product of prior art, and the specific performance data see Table 1.
Table 1.
The invention will be further described below by embodiment, but it does not influence protection scope of the present invention:
Embodiment 1
(1) 165.6ml water, 12.0g aniline and 12.6ml hydrochloric acid are placed there-necked flask, under violent stirring, Dropwise 5 0ml ammonium persulfate solution (including ammonium persulphate 22.5g) gradually.Room temperature reaction 12 hours.Filtration, repetitive scrubbing obtain blackish green polyaniline.(2) the gained polyaniline is placed the ammonia soln of 200g10%, stirs after 4 hours, filter, water wash repeatedly to PH be 7, carry out vacuum-drying, obtain the 10.1g polyaniline in eigenstate, productive rate is 84%.(3) get 4.0g polyaniline in eigenstate, 12.4g Witco 1298 Soft Acid (DBSA), 180ml water and 25ml ethanol (solubility promoter) and place there-necked flask, hot doping 4h under reflux state, after water and ethanol evaporation fallen, carry out vacuum-drying, promptly get the adulterated solvable electrically conductive polyaniline of DBSA.Its electric conductivity is 24.8S/cm, and the dissolution rate in dimethylbenzene is 94.6%, and recording its thermostability with TG is 202 ℃.
Embodiment 2
Repeat the process of embodiment 1, replace Witco 1298 Soft Acid, use 25ml NMP instead of ethanol, obtain the adulterated solvable electrically conductive polyaniline of CSA with 8.8g camphorsulfonic acid (CSA).Its electric conductivity is 324.6S/cm, and the dissolution rate in dimethylbenzene is 92.4%, and recording its thermostability with TG is 205 ℃.
Comparative example 1
165.6ml water, 12.0g aniline and 12.6ml hydrochloric acid are placed there-necked flask, under violent stirring, Dropwise 5 0ml ammonium persulfate solution (including ammonium persulphate 22.5g) gradually.Room temperature reaction 12 hours.Filter, use the 0.5NHCl washing copolymer repeatedly, in filtrate, do not have SO
4 2-, carry out vacuum-drying, obtain the doped hydrochloride polyaniline.Its electric conductivity is 7.8S/cm, and the dissolution rate in dimethylbenzene is 3.2%, and recording its thermostability with TG is 154 ℃.
Comparative example 2
Take by weighing 25g Witco 1298 Soft Acid (DBSA), add 150g dimethylbenzene and 50mlH
2O after stirring makes it emulsification, adds 8.6g aniline, Dropwise 5 0ml ammonium persulfate solution (including ammonium persulphate 18.5g), room temperature reaction 12 hours.To react the back emulsion and pour breakdown of emulsion in the 200ml acetone into, and filter, repetitive scrubbing carries out vacuum-drying, promptly gets the DBSA doped polyaniline of letex polymerization.Its electric conductivity is 11.6S/cm, and the dissolution rate in dimethylbenzene is 42.3%, and recording its thermostability with TG is 192 ℃.
Claims (2)
1, a kind of preparation method of soluble conductive polyaniline is characterized in that, the key step of described method is:
With polyaniline in eigenstate, concentration is that the mixed solvent that the organic protonic acid of 0.05-2mol/L macromole and water and solubility promoter are formed places reactor, stirs 1～24 hour down at 40～100 ℃, promptly gets the soluble conductive polyaniline after filtration, washing, the drying;
Wherein: the organic protonic acid of described macromole is camphorsulfonic acid, Witco 1298 Soft Acid, hexadecyl Phenylsulfonic acid or naphthene sulfonic acid, and the aniline unit molar ratio in itself and the polyaniline is 0.5～2; Described secondary solvent is to dissolve each other with water and can increase the aprotic organic solvent of the organic protonic acid of macromole solubleness in water, and the mass ratio of water and solubility promoter is 95-70: 5-30 in the described mixed solvent.
2, the method for claim 1 is characterized in that, wherein said solubility promoter is ethanol, butanols, N, dinethylformamide, dimethyl sulfoxide (DMSO) or 1-Methyl-2-Pyrrolidone.
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| CNB021452946A CN1189502C (en) | 2002-11-14 | 2002-11-14 | Method for preparing fusible conductive polyaniline |
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| CNB021452946A CN1189502C (en) | 2002-11-14 | 2002-11-14 | Method for preparing fusible conductive polyaniline |
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| CN1189502C true CN1189502C (en) | 2005-02-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293885B (en) * | 2007-04-27 | 2012-04-18 | 中国科学院化学研究所 | New purpose of acid doped conductive polyaniline |
| CN101503513B (en) * | 2008-12-24 | 2012-06-06 | 华东理工大学 | Preparation of conductive polymers based bisulfide |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4089666B2 (en) * | 2003-08-28 | 2008-05-28 | 東海ゴム工業株式会社 | Semiconductive composition |
| CN1296410C (en) * | 2004-11-09 | 2007-01-24 | 武汉理工大学 | Process for preparing doped conductive polyaniline |
| CN100417676C (en) * | 2004-12-15 | 2008-09-10 | 同济大学 | Method for preparing high-contented polyaniline micro-emulsion |
| CN100430534C (en) * | 2006-11-23 | 2008-11-05 | 华东理工大学 | Method for preparing electrically conductive polyaniline nano fiber |
| CN101798386A (en) * | 2010-03-17 | 2010-08-11 | 上海大学 | Method for preparing water-soluble conductive polyaniline |
| EP2624305A4 (en) * | 2010-09-27 | 2017-10-04 | Ocean's King Lighting Science&Technology Co., Ltd. | Counter electrode for dye-sensitized solar cell and manufacturing method thereof |
| CN103304806B (en) * | 2012-03-09 | 2016-07-13 | 中国石油天然气股份有限公司 | A kind of preparation method of oil-soluble polyaniline |
| CN103396547B (en) * | 2013-08-08 | 2016-03-30 | 安徽理工大学 | A kind of preparation method of doped polyaniline crystal |
| CN104498986A (en) * | 2014-12-22 | 2015-04-08 | 安徽理工大学 | Polyaniline single crystal film with long-term stable existence in atmospheric environment |
| CN106519666B (en) * | 2016-10-10 | 2019-01-18 | 湖北大学 | A kind of taurine secondary doping polyaniline and preparation method thereof |
-
2002
- 2002-11-14 CN CNB021452946A patent/CN1189502C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101293885B (en) * | 2007-04-27 | 2012-04-18 | 中国科学院化学研究所 | New purpose of acid doped conductive polyaniline |
| CN101503513B (en) * | 2008-12-24 | 2012-06-06 | 华东理工大学 | Preparation of conductive polymers based bisulfide |
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| CN1415645A (en) | 2003-05-07 |
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