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Template-free preparation method of polymer hollow colloidal sphere

A technology of polymer and colloid spheres, applied in microsphere preparation, microcapsule preparation, chemical recycling, etc., can solve the problems of increased production cost of templates, limited versatility, irregular shape of hollow particles and wide size distribution, etc. Narrow size distribution, saving raw materials and stable product quality

Inactive Publication Date: 2013-05-15
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need for good compatibility between the monomer and the interface, the versatility of this method is limited; at the same time, due to the instability and size polydispersity of the soft template due to the influence of temperature, environmental disturbance and other factors, resulting in The resulting hollow particles often have irregular shapes and broad size distributions
In addition, the use of templates in the synthesis process undoubtedly increases the production cost

Method used

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  • Template-free preparation method of polymer hollow colloidal sphere
  • Template-free preparation method of polymer hollow colloidal sphere
  • Template-free preparation method of polymer hollow colloidal sphere

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 0.40 gram of copper acetate monohydrate was dissolved in 40 milliliters of water to obtain a solution with a concentration of 0.05 mol / liter, which was then added to a 250 milliliter stainless steel reactor lined with polytetrafluoroethylene; 160 milliliters of 0.020 mol / liter An aqueous solution of o-methoxyaniline was added to the reaction kettle. After sealing, react at a constant temperature of 150 oC for 7 hours. After cooling to room temperature, centrifuge the colloid solution obtained in the reactor (3000 rpm), wash with ethanol or acetone for 3 times, and disperse in water to obtain Hollow poly-o-methoxyaniline colloidal spheres, the scanning electron microscope (SEM) and transmission electron microscope (TEM) photos of the hollow poly-o-methoxyaniline colloidal spheres prepared in this example are as follows figure 1 As shown in (A) and (B), it can be seen from the figure that the particle size of the hollow poly-o-methoxyaniline colloidal spheres is 200–4...

Embodiment 2

[0034]0.60 grams of copper acetate monohydrate were dissolved in 40 milliliters of water to obtain a solution with a concentration of 0.075 mol / liter, which was then added to a 300 milliliter stainless steel reactor lined with polytetrafluoroethylene; 160 milliliters of 0.025 mol / liter An aqueous solution of o-methoxyaniline was added to the reaction kettle. After sealing, react at a constant temperature at 180 oC for 10 hours. After cooling to room temperature, centrifuge the colloid solution obtained in the reactor (3000 rpm), wash with ethanol or acetone for 3 times, and disperse in water to obtain Such as image 3 Hollow poly-o-methoxyaniline colloidal spheres with a particle size of 200–400 nm and an average cavity volume of 10% are shown.

Embodiment 3

[0036] 0.40 gram of copper acetate monohydrate was dissolved in 40 milliliters of water to obtain a solution with a concentration of 0.05 mol / liter, which was then added to a 250 milliliter stainless steel reactor lined with polytetrafluoroethylene; 160 milliliters of 0.025 mol / liter An aqueous solution of o-methoxyaniline was added to the reaction kettle. After sealing, react at a constant temperature at 180 oC for 12 hours. After cooling to room temperature, centrifuge the colloid solution obtained in the reactor (3000 rpm), wash with ethanol or acetone for 3 times, and disperse in water to obtain Such as Figure 4 Hollow poly-o-methoxyaniline colloidal spheres with a particle size of 200–420 nm and an average cavity volume of 2% are shown.

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Abstract

The invention relates to a template-free preparation method of a polymer hollow colloidal sphere with a nano structure. The template-free preparation method comprises the specific steps of: preparing a cupric acetate water solution as an initiator; adding the cupric acetate water solution into a stainless steel reaction kettle with a tetrafluoroethylene lining; or adding the prepared cupric acetate water solution into the stainless steel reaction kettle with the tetrafluoroethylene lining; then adding hexadecyl trimethyl ammonium bromide into the reaction kettle to prepare an alkaline copper bromide as the initiator; preparing a macromolecular monomer solution under an agitating condition; then adding the macromolecular monomer solution into the reaction kettle filled with the initiator in the step (1) to be mixed; sealing and heating to 150-180 DEG C and reacting for 4-12 hours, and cooling to obtain a colloidal solution; centrifuging and separating the colloidal solution and washing by utilizing a polarity organic solvent which is soluble to water; and dispersing the polarity organic solvent into the water again to obtain the polymer hollow colloidal sphere. The polymer hollow colloidal sphere comprises poly(o-anisidine), poly(o-ethoxyaniline), poly(3, 5-dimethoxyaniline) and polyaniline. The preparation method of the polymer hollow colloidal sphere provided by the invention is suitable for large-scale industrial production and has a very wide market prospect.

Description

technical field [0001] The invention relates to a method for preparing a nanostructured polymer, in particular to a template-free preparation method for a polymer hollow colloidal sphere with a hollow structure. Background technique [0002] The hollow polymer colloidal sphere has an adjustable cavity and shell wall thickness. Due to the existence of internal air, the refractive index between the polymer interface and the polymer interface is different, and scattering occurs when light passes through. The good light-scattering properties of hollow polymer microspheres make them have strong hiding power as paints (pigments) on the covered objects, so their application in paints has attracted much attention. The light-scattering ability of hollow polymer colloidal spheres has a great relationship with its cavity volume and the shape of microspheres. Hollow polymer colloidal balls have the unique characteristics of small specific gravity and small dosage, which can reduce the ...

Claims

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Application Information

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IPC IPC(8): B01J13/02C08G73/02
CPCY02P20/582
Inventor 谭轶巍常洪进
Owner NANJING UNIV OF TECH
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