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Method for preparing inorganic/organic composite microparticle using O/W type emulsion

A technology of emulsification and microparticles, which is applied in the preparation of microspheres and microcapsule preparations, and can solve the problems of low content of organic components, easy flying of powder, and poor working environment

Inactive Publication Date: 2008-09-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrophobic silica produced by this method is not easy to mix with general-purpose polymer materials, and because the content of organic components is very low, the resulting powder is easy to fly and the working environment is worse

Method used

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  • Method for preparing inorganic/organic composite microparticle using O/W type emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Pour 150ml of deionized water into a 500ml stainless steel container, then add 30g O / W higher fatty acid emulsion and 0.4g O / W type organic fluorine emulsion and stir to disperse, add 10g of γ-glycidyl ether oxygen during stirring Propyltrimethoxysilane and 2ml of glacial acetic acid were stirred at room temperature for 1 hour and injected into a 300ml sprayer. After adding 80g of hydrophilic silica ZEOSIL 200 into a 2000ml stainless steel reaction kettle, spray the prepared O / W type mixed emulsion into the reaction kettle within 1h under stirring at 1000rpm, and then maintain it at room temperature for another 1h of stirring. Then, the temperature of the reactor was heated to 130°C under slow stirring, and the evaporated liquid was recovered through the condenser. After heating at 130°C for 8 hours, the reactor was cooled to room temperature, and the inorganic / organic composite microparticle 1 of Example 1 was obtained.

Embodiment 2

[0057] 30g O / W type higher fatty alcohol is substituted for the O / W type higher fatty acid emulsified product in embodiment 1 and adds 8g O / W type organic fluorine emulsified matter, adopts the method for embodiment 1, obtains the inorganic / organic compound of embodiment 2 Composite microparticles 2.

Embodiment 3

[0059] 40g of the O / W type AKD emulsion is substituted for the O / W type higher fatty acid emulsion in Example 1 and 2g of the O / W type silicone emulsion is added, and the method of Example 1 is adopted to obtain the inorganic / organic emulsion of Example 3 Composite microparticles3.

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Abstract

The present invention relates to preparation of hydrophobic inorganic / organic composition particle, and is especially preparation process of inorganic / organic composition particle with O / W type emulsion. The present invention features that silane coupler containing epoxy silane coupler in 25-100 weight is first mixed with O / W type emulsion in 1-30 wt% and the hydrophilic silica powder is surface treated; and through drying at 120-150 deg.c, inorganic / organic composition particle is prepared. The inorganic / organic composition particle possesses excellent hydrophobicity, and may be used as carrier for slow released medicine, slow released pesticide and efficient nanometer catalyst, stuffing and surface modifier for paint, plastic, rubber, etc.

Description

technical field [0001] The present invention relates to a method for producing hydrophobic inorganic / organic composite microparticles. The microparticles can be used as carriers of slow-release medicines, slow-release pesticides and high-efficiency nanocatalysts, and can be widely used as fillers in polymers such as coatings, plastics, and rubber. material field. Background technique [0002] Fumed silica without surface treatment and silica produced by precipitation method are hydrophilic, generally in the presence of surfactants, with amides of higher fatty acids (erucamide, oleamide, etc.), Polyethylene or polypropylene synthesizes paraffin wax, higher fatty alcohols, higher fatty acids and higher fatty acid esters, which are solid organic substances at room temperature, and undergoes surface hydrophobization treatment. In addition, at least one or more substances selected from mineral oils, vegetable oils, and silicone oils that are liquid at room temperature may be sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02
Inventor 王重辉翁睿李俊王想
Owner WUHAN UNIV OF TECH