Method for preparing polystyrene/conductive polymer composite hollow microspheres

A technology of conductive polymer and polystyrene, applied in the field of preparation of polymer composite hollow microspheres, achieves the effects of simple method, good monodispersity and controllable monodispersity

Inactive Publication Date: 2011-04-20
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the method of preparing conductive polymer composite hollow microspheres in one step without removing the PSt microsphere core has not been reported yet.

Method used

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  • Method for preparing polystyrene/conductive polymer composite hollow microspheres
  • Method for preparing polystyrene/conductive polymer composite hollow microspheres
  • Method for preparing polystyrene/conductive polymer composite hollow microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: be the PSt microsphere of 720nm with particle diameter as template coating PANI

[0038] The PSt emulsion (solid content is 9.63wt%) and 34mL deionized water that the particle diameter prepared by 6.37g reference example 1 is 720nm is added in the single-necked round bottom flask, ultrasonic vibration 30min, make dispersion uniform (solid content is 1.52wt%) %). Then pass N under magnetic stirring 2 After reaching 20min, cool with an ice-water bath, mix 0.4mL aniline (ANI) (0.4g, 4mmol) with 2mL 2.5mol / L hydrochloric acid (5mmol) aqueous solution first and then add it, the pH of the whole mixture obtained is about 1, magnetically stir After 30 min, 10 mL of aqueous solution containing 1 g of APS (4 mmol) was added (the molar ratio of APS to ANI was 1:1) to initiate polymerization. After reacting in an ice-water bath for 8 h, the reaction was continued at room temperature for 16 h under magnetic stirring to obtain an average PSt / PANI composite hollow micr...

Embodiment 2

[0040] Embodiment 2: Be that the PSt microsphere of 260nm is template-coated PANI with particle diameter

[0041] Repeat Example 1, the difference is: the PSt emulsion in Example 1 is changed to 6.75g (solid content is 9.10wt%) PSt emulsion with a particle diameter of 260nm prepared in Reference Example 3, and 34mL deionized The water was changed to 33 mL deionized water. As a result, PSt / PANI composite hollow microspheres with an average particle size of 380nm and a shell thickness of about 60nm were obtained.

[0042] The scanning electron micrograph of the PSt / PANI composite hollow microsphere shows that polyaniline is coated with a certain thickness on the surface of the PSt microsphere; the transmission electron micrograph of the PSt / PANI composite hollow microsphere shows that the composite microsphere is hollow.

Embodiment 3

[0043] Example 3: Using PSt microspheres with a particle size of 650nm as a template and APS as an oxidant to coat PPy

[0044] The PSt emulsion (solid content is 10.30wt%) and 34mL deionized water that 6.5g reference example 2 prepares is 650nm PSt emulsion (solid content is 1.65wt%) joins in the single-necked round-bottomed flask, ultrasonic vibration 30min, makes dispersion uniform (solid content is 1.65wt%) %). Then pass N under magnetic stirring 2 After 20 min, cool in an ice-water bath, mix 0.3 mL of pyrrole (py) (0.29 g, 4 mmol) with 2 mL of 2.5 mol / L hydrochloric acid (5 mmol) aqueous solution and add to it, the pH of the whole mixture obtained is about 1, and stir magnetically for 30 min , then add 10mL aqueous solution containing 0.98g APS (4mmol) (the molar ratio of APS to pyrrole is 1:1) to initiate polymerization, react in an ice-water bath for 8h, continue to react at room temperature under magnetic stirring for 16h, and obtain the average particle size PSt / PPy...

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Abstract

The invention discloses a method for preparing polystyrene/conductive polymer composite hollow microspheres, which comprises the following steps of: adding aniline or pyrrole and acid or mixture thereof into polystyrene emulsion under the protection of inert gas, stirring the obtained mixture for at least 10 minutes, and then adding an initiator into the mixture to perform polymerization, whereinthe molar ratio of the aniline or the pyrrole to the acid is 0.2 to 0.8, the weight ratio of the aniline or the pyrrole to the polystyrene is 0.1 to 1.0, and the initiator is ammonium persulfate, potassium persulfate, iron trichloride or ferrous sulfate heptahydrate/ hydrogen peroxide. Different from the traditional method for preparing the hollow polymer microspheres, the method does not need high-temperature calcination or solvent denucleation treatment and can prepare the polymer composite hollow microspheres by one step, and the microspheres have good appearance and monodispersity. The method is simple, has a few operation steps, and is easy for subsequent treatment; and because the used solvent is a green solvent, the method is safe and reliable, and has low cost.

Description

technical field [0001] The invention relates to a method for preparing polymer composite hollow microspheres, more specifically to a method for preparing polystyrene / conductive polymer composite hollow microspheres using polystyrene microspheres as templates. Background technique [0002] Due to its excellent electrical and optical properties, conductive polymers have potential application prospects in energy, optoelectronic devices, sensors, anti-corrosion materials, information storage and processing, electromagnetic shielding, stealth technology and modified biological brakes, etc. focus on. Among many conductive polymers, polyaniline (PANI) and polypyrrole (PPy) have attracted much attention due to their electrical, optical, magnetic properties, and good environmental stability. However, their insoluble, infusible, and poor mechanical properties and processability in conventional solvents largely limit their applications. In order to overcome these shortcomings, the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L79/02C08L79/04C08G73/02C08G73/06C08J3/00C08J3/12C08F112/08C08F2/22
Inventor 黄俐研梁慧刘正平
Owner BEIJING NORMAL UNIVERSITY
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