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Emulsion of hyperstable latex capable of varying phase of circulation

A technology of emulsions and emulsifiers, applied in chemical instruments and methods, chemical/physical processes, dissolution, etc., can solve problems such as cost increase

Active Publication Date: 2008-01-23
SHENZHEN GENE BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, modification leads to a substantial increase in cost

Method used

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  • Emulsion of hyperstable latex capable of varying phase of circulation
  • Emulsion of hyperstable latex capable of varying phase of circulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] At room temperature, use an ultrasonic disperser (50W, 2min) to disperse 0.1g and 0.4g of unmodified nano-calcium carbonate in 10mL containing 1×10 -6 mol L -1 Add 10 mL of n-octane to the CTAB aqueous solution, and emulsify with a high-shear emulsifier at 5000 rpm for 3 minutes. A stable oil-in-water emulsion was obtained. The droplet size was large and visible to the naked eye, but it decreased with the increase of the nanoparticle concentration. Figure 1(a) and (b) are micrographs.

Embodiment 2

[0021] At room temperature, use an ultrasonic disperser to disperse 0.2g of unmodified nano-calcium carbonate in 10mL containing 1×10 -5 mol L -1 Add 10 mL of toluene to the CTAB aqueous solution, and emulsify with a high-shear emulsifier at 5000 rpm for 3 minutes. A stable oil-in-water emulsion is obtained, and the droplet size is relatively large and visible to the naked eye. Figure 2 is a photomicrograph.

Embodiment 3

[0023] At room temperature, use an ultrasonic disperser to disperse 0.2 g of unmodified nano-calcium carbonate in 10 mL of SDS aqueous solutions of different concentrations, add 10 mL of toluene, and emulsify with a high-shear emulsifier at 5000 rpm for 3 minutes. Different types of emulsions are obtained. When the SDS concentration is less than 2.5×10 -3 mol L -1 , the emulsion is O / W type, when the SDS concentration is 2.5×10 -3 ~8×10 -3 mol L -1 When the emulsion is W / O type, when the SDS concentration is greater than 8×10 -3 mol L -1 When, the emulsion turns into O / W type again. Figure 3(a)(b)(c) are photomicrographs.

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Abstract

An super stable emulsion emulsifier which can make the circle direction change is provided, which belongs to surface activating agent and colloid field. The invention is composed of Nami calcium carbonate grains without modification and ion-typed surface activating agent The Nami calcium carbonate grains and the ion-typed surface activating agent take effect to each other in aqueous medium, which changes the surface humidity of the Nami grains at site and makes the Nami grains have surface activity, thus be able of collecting or adsorbing on oil or water interface, and make the emulsion stable; with changing the usage proportion of the Nami calcium carbonate grains (adding concentration is counted by emulsion aqueous phase weight as 0.5 per cent to 6 per cent) and the ion-typed surface activating agent (the using concentration is counted by emulsion aqueous phase volume as 1 multiply 10 to 6 to 0.5 mol L-1) to realize circle direction change, namely from oil in water (O / W) to water in oil (W / O), then change into oil in water (O / W). The emulsifier can be used in pesticide, paint, dope, oil production, fuel watering and multiple technology field.

Description

technical field [0001] The present invention relates to an emulsifier of ultra-stable oil-in-water (O / W) or water-in-oil (W / O) emulsion and its application. Using this emulsifier can realize the circulation of the emulsion by changing the composition of the emulsifier Phase inversion belongs to the field of surfactants and colloids, and involves many application technical fields such as pesticides, paints, coatings, oil extraction, and water addition to fuel oil. technical background [0002] It is well known that emulsions stabilized with common surfactants are only stable for a certain period of time, ie have limited dynamic stability. Essentially such emulsions are thermodynamically unstable systems that settle, separate, coalesce and eventually separate into oil / water phases during storage. The instability of the emulsion brings a series of problems to the application of the emulsion. In recent years, it has been found that nanoparticles with appropriate surface wettab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/00B01F3/08C09K23/00
Inventor 崔正刚施凯州崔燕贞
Owner SHENZHEN GENE BIOLOGICAL TECH
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