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Floating bead based polypyrrole conductive composite with adjustable conductivity and preparation method thereof

A technology of floating bead-based polypyrrole and composites, which is applied in the field of floating bead-based polypyrrole conductive composites and its preparation, can solve the problems of atmospheric and thermal instability, difficult processing and molding, and non-melting, etc. The effect of controlling defects, broadening industrial application value, and meeting the requirements of differences

Inactive Publication Date: 2012-01-04
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypyrrole itself has not been widely used because of its instability to the atmosphere and heat, insolubility, infusibility, and difficulty in processing and molding.

Method used

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  • Floating bead based polypyrrole conductive composite with adjustable conductivity and preparation method thereof
  • Floating bead based polypyrrole conductive composite with adjustable conductivity and preparation method thereof
  • Floating bead based polypyrrole conductive composite with adjustable conductivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0028] 1) Pretreatment of floating beads: Soak the floating beads extracted from fly ash with dilute nitric acid for 9 hours, then rinse with distilled water until the effluent water is neutral, and dry them for later use.

[0029] 2) Prepare 0.004 g·mL -1 NaCl solution, add polymethyl diallyl ammonium chloride, namely PDDA, prepare 0.15 wt.% PDDA solution, add the product obtained in the above step 1) and filter after stirring for 60min to obtain floating beads-PDDA; prepare 0.004 g·mL -1 NaCl solution, adding sodium polystyrene sulfonate, that is, PSS, to prepare a 0.05 wt.% PSS solution, adding floating beads-PDDA and stirring for 30min, then filtering to obtain floating beads-(PDDA-PSS) 1 .

[0030] 3) Secondary deposition process: Using the sample obtained in the above step 2) as a carrier, repeat step 2) to obtain floating beads for secondary deposition of polyelectrolyte, which is denoted as floating beads-(PDDA-PSS) 2 .

[0031] 4) Transfer 0.8g of the product pr...

Embodiment 3

[0037] 1) Pretreatment of floating beads: Soak the floating beads extracted from fly ash with dilute nitric acid for 10 hours, then rinse with distilled water until the effluent water is neutral, and dry them for later use.

[0038] 2) Prepare 0.006 g·mL -1 Add polymethyldiallyl ammonium chloride, i.e. PDDA, to prepare a 0.2 wt.% PDDA solution, add the product obtained in the above step 1) and stir for 60min, then filter to obtain floating beads-PDDA; prepare 0.006 g·mL -1 NaCl solution, adding sodium polystyrene sulfonate, that is, PSS, to prepare a 0.1 wt.% PSS solution, adding floating beads-PDDA and stirring for 30min, then filtering to obtain floating beads-(PDDA-PSS) 1 .

[0039] 3) Three deposition processes: using the sample obtained in the above step 2) as a carrier, repeat step 2) twice to obtain polyelectrolyte three-time deposited floating beads, denoted as floating beads-(PDDA-PSS) 3 .

[0040]4) Transfer 1 g of the product prepared in step 3) to 25 ml of di...

Embodiment 4

[0047] 1) Pretreatment of floating beads: Soak the floating beads extracted from fly ash with dilute nitric acid for 11 hours, then rinse with distilled water until the effluent water is neutral, and dry them for later use.

[0048] 2) Prepare 0.006 g·mL -1 Add polymethyldiallyl ammonium chloride, i.e. PDDA, to prepare a 0.2 wt.% PDDA solution, add the product obtained in the above step 1) and stir for 60min, then filter to obtain floating beads-PDDA; prepare 0.006 g·mL -1 NaCl solution, adding sodium polystyrene sulfonate, that is, PSS, to prepare a 0.1 wt.% PSS solution, adding floating beads-PDDA and stirring for 30min, then filtering to obtain floating beads-(PDDA-PSS) 1 .

[0049] 3) Four times of deposition process: with the sample obtained in the above step 2) as a carrier, repeat step 2) three times to obtain floating beads of polyelectrolyte deposited four times, denoted as floating beads-(PDDA-PSS) 4 .

[0050] 4) Transfer 1.2g of the product prepared in step 3...

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Abstract

The invention discloses a floating bead based polypyrrole conductive composite with adjustable conductivity and a preparation method thereof. In the composite, a floating bead is used as a carrier, and polypyrrole is loaded on the floating bead in a controllable film layer form. The preparation method comprises the following steps that: the pretreatment of the floating bead is achieved through repeated and multiple depositions of polycation diallyldimethyl ammonium chloride and polyanion sodium styrene sulfonate on the surface of the floating bead by using an electrostatic self-assembly method, i.e., homogenization of surface charge is achieved; and the controllable load of polypyrrole on the surface of the floating bead is achieved by using a chemical in suit polymerization method. The load amount of polypyrrole on the surface of the floating bead can be controlled through regulating the deposition layer number of a polyelectrolyte on the surface of the floating bead, thus changing the conductivity of the composite and being in favor of meeting the difference requirement of different fields on the conductivity of the material; and simultaneously, the defect that the topography of polypyrrole is not controlled in the preparation process is improved by introducing a floating bead template, thereby increasing the industrial application value of the composite.

Description

[0001] technical field [0002] The invention relates to a floating bead-based polypyrrole conductive compound with adjustable conductivity and a preparation method thereof. In the method, by controlling the number of deposition layers of the polyelectrolyte on the surface of the carrier floating beads, the loading amount of the polypyrrole can be effectively controlled, thereby adjusting the conductivity of the composite material. Background technique [0003] The rapid development of the electronics industry and information technology and other industries has brought convenience and comfort to human life, but it has also produced a large amount of radiation pollution, endangering human health. Therefore, the demand for polymer materials with conductive and wave-absorbing functions is becoming more and more urgent. Conductive high polymers have become one of the high-profile conductive wave-absorbing materials because of their advantages such as low density, molecular desig...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08K9/04C08K7/26C08G73/06
Inventor 李琴王冰崔浩庞建峰翟建平
Owner NANJING UNIV
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