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Hollow nano silica microsphere modified polyacrylate nuclear shell structure composite emulsion and thin film

A technology of nano-silica and polyacrylate, which is applied in the field of polymer and nano-composite materials and their preparation, can solve the problems that the compatibility between nano-silica and polymer matrix cannot be achieved, and achieve easy popularization and application, good Effect of improving mechanical properties, damping properties, and dispersion properties

Inactive Publication Date: 2010-12-01
张以河 +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the prior art can only use silicon dioxide particles to modify polyacrylate emulsions and films and the compatibility of nano silicon dioxide and polymer matrix can not meet some use requirements

Method used

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  • Hollow nano silica microsphere modified polyacrylate nuclear shell structure composite emulsion and thin film
  • Hollow nano silica microsphere modified polyacrylate nuclear shell structure composite emulsion and thin film
  • Hollow nano silica microsphere modified polyacrylate nuclear shell structure composite emulsion and thin film

Examples

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Effect test

Embodiment 1

[0024] (1) Preparation of modified polystyrene microspheres as hollow microsphere templates, the preparation method is as follows: add 0.3gSDBS, 0.1gNaHCO As a buffer and 90g distilled water, first ultrasonically disperse, then place in a three-necked flask, heat and stir . After 30 minutes, 5g-15g of styrene was added, and the temperature was raised to 70°C, and 0.1g-0.5g of ammonium persulfate in 10ml of aqueous solution was added. After 1 hour of reaction, slowly add 1g~4g of γ-methacryloxypropyltrimethoxysilane (KH-570) dropwise and add 0.02g of ammonium peroxodisulfate, and react for 2.5 hours to obtain Polystyrene seed white emulsion.

[0025] (2) TEOS hydrolysis coating: Take 3m~10ml of emulsion, 95ml of ethanol and 2.8ml of ammonia (0.4mol / L) into a three-necked flask, stir at high speed, raise the temperature to 70°C, and then drop in 7.5ml of ethanol and 3m~10ml For the mixed solution of TEOS, the dropping speed is 10ml / h~40ml / h. After the dropping is completed, th...

Embodiment 2

[0030] (1) Preparation of modified polystyrene microspheres as hollow microsphere templates, the preparation method is as follows: add 0.3gSDBS, 0.1gNaHCO As a buffer and 90g distilled water, first ultrasonically disperse, then place in a three-necked flask, heat and stir . After 30 minutes, 5g-15g of St was added, and the temperature was raised to 70°C, and 0.1g-0.5g of ammonium persulfate in 10mL of aqueous solution was added. After reacting for 1 hour, slowly add 1g-4g of KH-570 dropwise and add 0.02g of ammonium peroxodisulfate. After reacting for 2.5 hours, a polystyrene seed white emulsion with hydroxyl groups on the surface is obtained.

[0031] (2) TEOS hydrolysis coating: Take 3m~10ml of emulsion, 95ml of ethanol and 2.8ml of ammonia water (0.4mol / L) and add them into a three-necked flask, stir at high speed, and then add 7.5ml of ethanol and 3ml~10ml of TEOS drop by drop. Solution, the dropping rate is 1ml / h~10ml / h, after the dropwise addition, continue to react for...

Embodiment 3

[0036] (1) Prepare the modified polystyrene microspheres as the hollow microsphere template, and the preparation method is as follows: add 0.3gSDBS, 0.1g NaHCO as buffer and 90g distilled water, first ultrasonically disperse, then place in a three-necked flask, heat and Stir. After 30 minutes, 5g-15g of St was added, and the temperature was raised to 70°C, and 0.1g-0.5g of ammonium persulfate in 10mL of aqueous solution was added. After reacting for 1 hour, slowly add 1g-4g KH-AM (self-made coupling agent) dropwise and add 0.02g ammonium peroxodisulfate. After reacting for 2.5 hours, a polystyrene seed white emulsion with hydroxyl groups on the surface is obtained.

[0037] (2) TEOS hydrolysis coating: Take 3m~10ml of emulsion, 95ml of ethanol and 2.8ml of ammonia water (0.4mol / L) and add them into a three-necked flask, stir at high speed, raise the temperature to 70°C, and then drop in 7.5ml of ethanol and 3m~ 10ml TEOS mixed solution, the dropping rate is 10ml / h~40ml / h, aft...

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Abstract

The invention relates to a method for preparing a hollow nano silica microsphere modified polyacrylate nuclear shell structure composite emulsion thin film. The thin film is prepared from a polyacrylate resin serving as a matrix and hollow nano silica microspheres prepared by a template method serving as filler through coupling agent treatment, ultrasonic dispersion, emulsion polymerization and coating process. The thin film has the characteristics of high damping property and mechanical property of the hollow nano silica microspheres prepared by the template method. The preparation method has the advantages of simple process, low cost, short period and convenient industrialized production.

Description

technical field [0001] The invention belongs to the technical field of macromolecule and nanocomposite materials and their preparation, and in particular relates to a polyacrylate composite emulsion and film modified with hollow nanometer silicon dioxide microspheres and having excellent damping performance and mechanical performance. Background technique [0002] In 1968, Stober et al systematically studied monodisperse SiO 2 Controlled growth of spheres and fabrication of nanoscale SiO 2 Monodisperse system in ethanol solvent. Since then, research on nano-silica has aroused great interest among scientific researchers. With the development of nanotechnology, nanoparticles with novel topological structures have attracted great interest. Among them, hollow microspheres with a particle size of nanometer to micrometer have the characteristics of large specific surface area, low density, good stability and filterability, and have extremely broad application prospects. They c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F2/44C08K9/06C08J5/18
Inventor 张以河柯少剑吕凤柱余黎吴涛
Owner 张以河
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