Method for preparing polyaniline nano thread

A technology of nanowires and polyaniline, applied in the field of polymer materials, can solve the problems of low concentration, low cost, and large amount of organic solvents, and achieve the effects of mild reaction conditions, reduced dosage, and reduced chances of agglomeration

Inactive Publication Date: 2009-08-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is a new method. The advantage of this method is that in addition to using a water-insoluble organic solvent that forms an interface with water, it usually does not need to add other additives, the cost is lower than other methods, and the prepared polyaniline nanowires are relatively uniform. The disadvantage is that the amount of organic solvent used in this method is very large, and the concentration of the monomer is low

Method used

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  • Method for preparing polyaniline nano thread
  • Method for preparing polyaniline nano thread
  • Method for preparing polyaniline nano thread

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: 1. Add 90 ml of 1 mol / L hydrochloric acid aqueous solution and 2 g of 10% polyvinyl alcohol solution in a pre-dissolved mass fraction in a three-necked flask, and stir for 20 min. 2. Add 0.96g of aniline monomer into 5ml of carbon tetrachloride under ice-bath conditions and stir to make it a uniform solution. 3. The carbon tetrachloride solution of aniline is dripped into the water phase prepared in step 1 under stirring with a dropping funnel, and the solution is dripped within 20 minutes, and the reaction is carried out in an ice bath; 4. Add 2.28 g of ammonium persulfate to Add 10ml of hydrochloric acid aqueous solution with a concentration of 1mol / L to make a solution. And the solution was added dropwise to the solution in step 3, and the oxidant solution was added within 40 minutes; 5. After 4 hours of reaction, the product was filtered with suction. Wash with distilled water until the filtrate is neutral, and continue to wash with alcohol until the ...

Embodiment 2

[0022] Example 2: 1. Add 90 ml of 1 mol / L hydrochloric acid aqueous solution into a three-necked flask, add 2 g of a 5% polyvinylpyrrolidone solution that has been dissolved in advance, and stir for 20 min. 2. Add 0.96g of aniline monomer into 5ml of carbon tetrachloride under ice bath conditions, and stir to make it a uniform solution. 3. Use a dropping funnel to add the carbon tetrachloride solution of aniline in step 2 dropwise to the water phase of step 1 under stirring. The solution is added dropwise within 20 minutes, and the reaction is carried out in an ice bath; 4. 2.28g Potassium dichromate was added to 10ml of aqueous hydrochloric acid solution with a concentration of 1mol / L to form a solution. And the solution was added dropwise to the solution in step 3, and the oxidant solution was added within 40 minutes; 5. After reacting for 8 hours, the product was suction-filtered. Wash with distilled water until the filtrate is neutral, and continue to wash with alcohol un...

Embodiment 3

[0023]Embodiment 3: 1. Add 90 ml of 1 mol / L sulfuric acid aqueous solution in a three-necked flask, add 2 g of a 10% polyvinyl alcohol solution with a mass fraction dissolved in advance, and stir vigorously for 20 min. 2. Add 0.96 g of aniline monomer into 5 ml of cyclohexane under the condition of ice bath, and stir to form a uniform solution. 3. Use a dropping funnel to add the cyclohexane solution of aniline in step 2 to the water phase under stirring. The solution is added dropwise within 20 minutes, and the reaction process is carried out in an ice bath; 4. Add 2.28 g of persulfuric acid Ammonium was added to 10ml of sulfuric acid aqueous solution with a concentration of 1mol / L to form a solution. And the solution was added dropwise to the solution in step 3, and the oxidant solution was added within 40 minutes; 5. After 24 hours of reaction, the product was filtered with suction. Wash with distilled water until the filtrate is neutral, and continue to wash with alcohol ...

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Abstract

A preparation method of polyaniline nanometer line relates to a polymeric material, supplying a preparation method of polyaniline nanometer line based on the polymerization on suspended interface, the method is of gentle reaction conditions, high efficiency, and suitable for industrial production. A acidic aqueous solution containing 1mol / L hydrion concentration is added into a container to do external phase before water soluble dispersing agent is fed into and the water soluble dispersing agent concentration is 1 to 2 g / L in the terminal system; organic solution containing 0.1 to 1 mol / L aniline monomer is added into the acidic aqueous solution, then an acidic aqueous solution with the same mole of oxidant as aniline is added into the aqueous solution under the reaction temperature from 0 DEG C to room temperature, and the volume ration between organic phase and the acidic aqueous solution is 1 / 20 to 1 / 5; the product is filtrated after 2 to 48 hours of reaction, then the filtration is washed to neutral by distilled water, and washed with alcohol until the filtration is colorless and transparent; the product is baked under 40 to 60 DEG C, finally the polyaniline nanometer line with diameters between 40 to 90 nm is acquired.

Description

technical field [0001] The invention relates to a polymer material, in particular to a method for preparing conductive polyaniline nanowires. Background technique [0002] Conductive polyaniline has become one of the most commercially promising conductive polymers due to its excellent environmental stability, thermal stability and doping reversibility, and its ease of synthesis (Zhang D.H., Wang Y.Y., MAT.SCI.E.B, 2006, 134(1):9-19). Due to the nanoscale structure of polyaniline nanomaterials, it has the small size effect and quantum effect that traditional conductive polymerization does not have, endowing it with specific physical and chemical properties. For example, using polyaniline nanowires with a larger specific surface than traditional polyaniline, the sensor material made of it is tens of times more sensitive to ammonia in the environment than traditional sensors (Virji S., Huang J., Kaner R.B., Weiller B.H., NANO LETT., 2004, 4(3):491-496). Polyaniline nanowires...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02
Inventor 戴李宗陈江枫邓远名郑毅芳雷光财许一婷
Owner XIAMEN UNIV
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