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Method for preparing electric polypyrrole nano hollow sphere

A pyrrole nanometer and conductive polymerization technology is applied in the field of preparation of composite nanometer hollow spheres, which can solve the problems of high production cost, different sizes of hollow spheres, and difficulty in industrialization, so as to avoid waste and recycling costs, reduce intermediate processes, and reduce The effect of intermediate steps

Inactive Publication Date: 2011-04-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are two methods for preparing polypyrrole hollow spheres: one is the gas / liquid phase method, but the prepared hollow spheres are of different sizes, and the operation is complicated, so it is difficult to put into actual production; the other is the template method. There are many ways to achieve it, such as preparing polypyrrole hollow spheres by reacting modified polystyrene spheres with pyrrole; using polyvinylpyrrolidone coated on silica microspheres to absorb pyrrole, and then preparing polypyrrole by chemical polymerization. Coexisting microspheres of pyrrole and polyvinylpyrrolidone; use gold as the core to complete the coating of polypyrrole and then remove the core to form polypyrrole hollow spheres; use Fe 3 Cl is used as an initiator to synthesize polypyrrole nanocomposite spheres with AgCl as the core in a solution with chitosan, and then remove the AgCl core; the above methods all have complicated processing procedures, insufficient purity of the final product, and high production costs, which are not easy Disadvantages such as industrialization

Method used

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  • Method for preparing electric polypyrrole nano hollow sphere
  • Method for preparing electric polypyrrole nano hollow sphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, the preparation of polypyrrole hollow nanosphere

[0016] Weigh 0.15g of silica nanospheres and add them to 30ml of deionized water, ultrasonically disperse for 15 minutes, then add 0.1ml of pyrrole monomer, close the reaction system, and ultrasonically disperse for 30-45 minutes, so that the pyrrole monomer and silica nanospheres are fully Disperse evenly, transfer the reaction system to a reaction kettle, add ammonium persulfate aqueous solution (0.15g ammonium persulfate dissolved in 7.5ml deionized water), react at 180°C for 4 hours, filter and wash to obtain composite core-shell particles; The composite particle is added into 37% hydrofluoric acid, and after reacting for 12-24 hours, the unreacted hydrofluoric acid is neutralized with sodium hydroxide solution, and the black insoluble matter is filtered, washed with water, and washed with absolute ethanol. Collect the washed black filter cake.

[0017] Synthesized polypyrrole nanohollow spheres such ...

Embodiment 2

[0018] Embodiment 2, preparation of polypyrrole hollow nanospheres

[0019] Weigh 1.5g of silica nanospheres and add them to 30ml of deionized water, ultrasonically disperse for 15 minutes, then add 1ml of pyrrole monomer, close the reaction system, and ultrasonically disperse for 30-45 minutes to fully disperse the pyrrole monomer and silica nanospheres Evenly, transfer the reaction system to the reaction kettle, add ammonium persulfate aqueous solution (0.15g ammonium persulfate dissolved in 7.5ml deionized water), react at 100°C for 8 hours, filter and wash to obtain composite core-shell particles; Add the particles into 37% hydrofluoric acid, react for 12-24 hours, neutralize the unreacted hydrofluoric acid with sodium hydroxide solution, filter the black insoluble matter, wash it with water, and wash it with absolute ethanol. Collect the washed black filter cake.

[0020] Synthesized polypyrrole nanohollow spheres such as figure 2 As shown, the diameter of the hollow n...

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Abstract

The process of preparing composite particle of hollow nanometer conductive polypyrrole-silica ball includes the following successive steps: adding pyrrole monomer and nanometer silica ball into deionized water and dispersing ultrasonically; and introducing initiator to react at 100-180 deg.c to obtain the composite particle. Compared with available technology, the process of the present inventionhas the advantages of less intermediate steps, low cost, capacity of obtaining product with high size homogeneity and controllability, and other advantages.

Description

technical field [0001] The invention relates to a preparation method of polymer nano hollow spheres, in particular to a preparation method of conductive polypyrrole composite nano hollow spheres. Background technique [0002] Polypyrrole has electrical conductivity, chemical and thermal stability, and can be used as a medium to absorb and release certain biomacromolecular substances. Its potential application value in the field of biomedicine is being studied; it can be used as a paint and White plastic pigments, anti-ultraviolet additives and handle modifiers of water-based paints are widely used in paints, paints, paper, leather, cosmetics and other industries. At the same time, polypyrrole is a material that is non-toxic, non-pyrogenic, does not cause hemolysis and allergies, and has no mutagenic and irritating effects. It has good biological safety, so another important use of it is as microcapsules. Encapsulate functional compounds and make polymer materials with susta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L39/00C08K3/36C08F126/06C08F2/44
Inventor 刘小鹤吴泓毅邱冠周
Owner CENT SOUTH UNIV
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