Preparation method for amphiphilic nanometer particle and application of amphiphilic nanometer particle to prepare Pickering emulsion

A nanoparticle, amphiphilic technology, applied in nanotechnology, hybrid methods, nanotechnology, etc., can solve the problems of limited promotion and practical application, complicated operation, harsh reaction conditions, etc., and achieve great application prospects and industrialization capabilities, preparation. Simple process and good stability

Active Publication Date: 2014-09-03
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, solid particles with amphiphilic structure are mainly grafted polymer molecules with relatively complex structures onto the surface of solid particles. This surface modification method is complicated to operate and the reaction conditions are harsh. Greatly improve the cost of particles, the preparation steps of the particles are also very cumberso

Method used

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  • Preparation method for amphiphilic nanometer particle and application of amphiphilic nanometer particle to prepare Pickering emulsion
  • Preparation method for amphiphilic nanometer particle and application of amphiphilic nanometer particle to prepare Pickering emulsion
  • Preparation method for amphiphilic nanometer particle and application of amphiphilic nanometer particle to prepare Pickering emulsion

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Experimental program
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specific Embodiment approach

[0035] A kind of amphiphilic nanoparticle, it is prepared according to the following method:

[0036] (1) Preparation of epoxy-modified nanoparticles:

[0037] First disperse 0.5-2.0g of nanoparticles in 30-60g of ethanol, then drop 1-4g of glycidyl etheroxypropyl triethoxysilane into it drop by drop, stir vigorously, and react at 50-70°C for 18-24h ; Then carry out centrifugal separation, after the nanoparticles are separated, wash with deionized water for 1-3 times, then wash with ethanol for 1-3 times, and finally vacuum dry at 80-100°C for 10-16h to obtain epoxy-modified Sexual nanoparticles;

[0038] (2) Preparation of amino-modified nanoparticles:

[0039] First, disperse 0.5-2.0g of epoxy-modified particles in 30-60g of ethanol, add 1-2g of hexamethylenediamine, stir well, and react at 50-70°C for 4-10h; then perform centrifugation to separate the nanoparticles After coming out, wash with deionized water for 1-3 times, then wash with ethanol for 1-3 times, and finall...

Embodiment 1

[0058] Embodiment 1: a kind of amphiphilic nanoparticle, it is prepared according to the following method:

[0059] (1) Preparation of epoxy-modified nanoparticles:

[0060] Disperse 1.5g of nano-silica particles in 40g of ethanol, then drop 2g of glycidyl etheroxypropyltriethoxysilane (GPTEOS) dropwise into it, stir vigorously, and react at 50°C for 24h; then carry out After centrifugal separation, the nano-silica particles are separated, washed once with deionized water, washed twice with ethanol, and then vacuum-dried at 100°C for 10 hours to obtain epoxy-modified nano-silica particles;

[0061] (2) Preparation of amino-modified nanoparticles:

[0062] Weigh 1.5g of epoxy-modified nano-silica particles and disperse them in 40g of ethanol, add 1g of hexamethylenediamine, stir well, and react at 50°C for 6h; then perform centrifugation to separate the nano-silica particles , washed once with deionized water, washed twice with ethanol, and then vacuum-dried at 100°C for 10 h...

Embodiment 2

[0074] Embodiment 2: a kind of amphiphilic nanoparticle, it is prepared according to the following method:

[0075] (1) Preparation of epoxy-modified nanoparticles:

[0076] Disperse 1.0g of nano-titanium dioxide particles in 50g of ethanol, then drop 1.5g of glycidyl etheroxypropyltriethoxysilane (GPTEOS) dropwise into it, stir vigorously, and react at 50°C for 20h; then centrifuge Separation, after the nano-titanium dioxide particles are separated, they are washed once with deionized water and twice with ethanol, and then vacuum-dried at 100° C. for 10 hours to obtain epoxy-modified nano-titanium dioxide particles.

[0077] (2) Preparation of amino-modified nanoparticles:

[0078] Weigh 1.0 g of epoxy-modified nano-titanium dioxide particles and disperse them in 50 g of ethanol, add 1.5 g of hexamethylenediamine, stir well, and react at 50°C for 6 h; Wash once with deionized water, wash twice with ethanol, and then vacuum-dry at 100° C. for 12 hours to obtain amino-modifie...

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Abstract

The invention relates to a preparation method for an amphiphilic nanometer particle and application of amphiphilic nanometer particle to prepare Pickering emulsion. The novel amphiphilic nanometer particle is formed according to the following preparation method: firstly performing epoxy-group modification on the surface of a nanometer particle by employing a silane coupling agent, then utilizing hexylenediamine to react with epoxy groups, so as to further introduce amino groups, and finally adding proper amount of hydrochloric acid for neutralization. The particle is capable of replacing conventional surfactants for preparing highly-stable Pickering emulsions of silicone oil/water and or toluene/water. The amphiphilic nanometer particle is simple in preparation technology, good in stability and uneasy for being influenced by temperature, pH value, salinity and other factors, and therefore the amphiphilic nanometer particle possesses great application prospect and industrialization capability. The preparation method of the emulsion can be further expanded for preparing different oil/water emulsions, and even has potential application prospect in emulsion polymerization field.

Description

technical field [0001] The invention relates to an amphiphilic nano particle, in particular to a method for preparing the amphiphilic nano particle and its application in preparing Pickering emulsion. Background technique [0002] The traditional emulsion is prepared by adding a surfactant to mutually incompatible oil / water, and the unique amphiphilic molecular structure of the surfactant enriches the surfactant at the oil / water interface, thereby stabilizing the emulsion role. However, many researchers have found that the stability of the emulsion prepared by surfactant is not ideal, and it is easily affected by factors such as temperature, pH value, salt concentration, oil phase composition, etc., resulting in emulsion breakage. In addition, some surfactants also have certain toxicity, which is harmful to animals, plants, and even human body, which greatly limits the practical application of surfactants. [0003] In recent years, some researchers have proposed that amphi...

Claims

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Application Information

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IPC IPC(8): C01B33/18C01G23/047C01G9/02C01G19/02C01G49/06B01F17/00B01F3/08B22F9/24B22F1/02B82Y30/00B82Y40/00C09K23/00
Inventor 洪杰林金斌
Owner SKSHU PAINT
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