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A kind of aba-type colloidal particles with multiple properties on the surface and preparation method thereof

A technology of colloidal particles and properties, applied in the field of sub-micron scale material preparation, can solve problems such as the difficulty of colloidal particles

Inactive Publication Date: 2021-05-07
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation methods of spherical particles with multiple properties, such as interface protection method, microfluidic method, phase separation method, self-assembly method, etc., there are often certain limitations in the preparation, such as mass production, controllability and universality There are still many problems to be solved urgently; moreover, most of the multi-property spherical particles prepared at present are divided into two parts along the equator or near the equator, and it is difficult to obtain colloidal particles with a more special partition structure such as ABA type.

Method used

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  • A kind of aba-type colloidal particles with multiple properties on the surface and preparation method thereof
  • A kind of aba-type colloidal particles with multiple properties on the surface and preparation method thereof
  • A kind of aba-type colloidal particles with multiple properties on the surface and preparation method thereof

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Embodiment 1

[0029] Embodiment 1—Preparation of ABA type multi-property silica colloidal particles

[0030] Prepare ABA type multi-property colloidal particles according to the following steps:

[0031] (1) Modification of colloidal particles: 1 g of silicon dioxide (SiO2) with a diameter of 400 nm 2 ) particles and ultrasonically dispersed in 40mL ethanol, adding 2g of γ-aminopropyltriethoxysilane ultrasonically dispersed until completely dissolved; the dispersion was placed in a 70°C water bath to reflux for 12h, centrifuged three times and vacuum-dried at room temperature to obtain Amino modified SiO 2 particles.

[0032] (2) Pickering emulsion polymerization: Weigh 0.05g of amino-modified SiO obtained in step (1) 2 Particles and 1mL of 0.1wt% potassium persulfate aqueous solution (mass percentage) were ultrasonically dispersed in 9g of distilled water to form an aqueous phase, weighed 0.2g of styrene and 0.8g of paraffin (52#, melting point 50-52°C) and mixed uniformly at 60°C To b...

Embodiment 2

[0035] Embodiment 2—Preparation of ABA type multi-property silica particles

[0036] Prepare ABA type multi-property silica particles according to the following steps:

[0037] (1) colloidal particle modification: the 1g diameter is 300nm silicon dioxide (SiO 2) particles and ultrasonic dispersion in 40ml of ethanol, adding 2g of isopropyl tris (dioctyl pyrophosphate acyloxy) titanate and ultrasonic dispersion until completely dissolved. The dispersion was condensed and refluxed in a water bath at 70 °C for 12 h, centrifuged three times and then dried in vacuum at room temperature to obtain acyloxy-modified SiO 2 particles.

[0038] (2) Pickering emulsion polymerization: Weigh 0.05g of the acyloxy-modified SiO obtained in step (1) 2 Particles and 1mL of 0.1% ammonium persulfate aqueous solution are ultrasonically dispersed in 7g of distilled water to form a water phase, weigh 0.4g of methyl methacrylate and 0.6g of paraffin (30#, melting point 30-32°C) and mix well to form ...

Embodiment 3

[0041] Embodiment 3—Preparation of ABA type multi-property titanium dioxide colloidal particles

[0042] Prepare ABA type multi-property colloidal particles according to the following steps:

[0043] (1) Modification of colloidal particles.: 1g of titanium dioxide (TiO2) with a diameter of 500nm 2 ) particles and ultrasonically dispersed in 40ml ethanol, adding 2g of γ-mercaptopropyltrimethoxysilane ultrasonically dispersed until completely dissolved; the dispersion was placed in a 70°C water bath to reflux for 12h, centrifuged three times and vacuum-dried at room temperature to obtain mercapto Modified TiO 2 particles.

[0044] (2) Pickering emulsion polymerization: Weigh 0.02g of thiol-modified TiO obtained in step (1) 2 Particles and 1 mL of 0.1% azodiisopropylimidazoline hydrochloride aqueous solution were ultrasonically dispersed in 9 g of distilled water to form an aqueous phase, and 0.12 g of methyl methacrylate, 0.08 g of styrene and 0.3 g of paraffin wax (25#, The...

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Abstract

The invention discloses an ABA type colloid particle with multiple properties on the surface and a preparation method thereof, belonging to the technical field of submicron-scale material preparation. In the present invention, colloidal particles are used as particle emulsifiers, and the Pickering emulsion liquid water-oil three-dimensional interface is used as a protective interface. The monomers in the emulsion liquid are polymerized and phase separated to the interface, and a protective film is formed at the position of the colloidal particles near the equator. After selective modification Colloidal particles with a clear ABA-type partition on the surface can be obtained after characterization or etching and removal of the protective film. This method is based on emulsion polymerization, which is easy to achieve mass production, and the material has strong universality. The prepared ABA colloidal particles have good application value in optical and electromagnetic functional materials, medical materials, template materials, etc.

Description

technical field [0001] The present invention relates to the technical field of preparation of submicron-scale materials, and more specifically, to a colloidal particle with multiple properties on the surface and a preparation method thereof. Background technique [0002] Particles with multiple properties on the surface are special particles with two or more chemical compositions or functional partitions on the surface. Since De Genes proposed the concept of Janus particles in 1991, the related research on particles with dual properties on the surface has attracted widespread attention, and the integration and unification of dual functions have been realized on a single particle, such as hydrophilic and hydrophobic, positive and negative charges. It has great theoretical research value and potential application value in particle emulsifiers, intelligent nanomachines, display devices, reinforced materials, etc. Spherical particles are the most versatile preparation methods f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/08C08F120/14C08F220/14C08F212/08C08F220/18C08F220/20C08F2/44C01B33/14C01G23/08
Inventor 李婧刘洪丽李亚静李军伟冉亚迷张雪娜
Owner TIANJIN CHENGJIAN UNIV
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