Pickering super emulsifier silicon dioxide nano net and preparation method thereof

A silicon dioxide and emulsifier technology, applied in the direction of silicon dioxide, silicon oxide, etc., to achieve the effects of adjustable and controllable structure and size, simple preparation method, and wide composition

Active Publication Date: 2021-09-28
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for solid particle materials that can emulsify any immiscible liquid state system, it is of great research value and practical value to develop a simple and efficient preparation method of Pickering superemulsifier, and there is no international research on Pickering superemulsifier. Research Report on Lin Superemulsifier or Silica Nanonet

Method used

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  • Pickering super emulsifier silicon dioxide nano net and preparation method thereof
  • Pickering super emulsifier silicon dioxide nano net and preparation method thereof
  • Pickering super emulsifier silicon dioxide nano net and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 2.5 g of the sodium salt hydrolyzate of styrene-maleic anhydride copolymer in 100 mL of water, and mix well. The pH value of the above solution was adjusted to 10 with 25% concentrated ammonia water, and the solution was placed in a 50° C. water bath. A mixed solution of 4.0 g of methyl orthosilicate and 20 g of toluene was added to the above aqueous solution for homogeneous emulsification at a homogenization speed of 20,000 rpm, emulsification time of 5 min, and constant temperature reaction at 50°C for 12 h. The reaction system was cooled to room temperature, and silica nanonets were obtained after suction filtration, washing, drying and crushing. The scanning electron microscope photos of the silica nanonets are shown in figure 1 . The obtained silica nanonets were washed with deionized water and ethanol repeatedly by centrifugation or calcined at 400° C.-500° C. to remove the template agent. Mix 5mL water, 5mL decane, and 1wt% silica nanomesh, and vortex ...

Embodiment 2

[0035] Dissolve 2.5g of sodium lauryl sulfate in 100mL of water and mix well. The pH value of the above solution was adjusted to 2.5 with 2 mol / L hydrochloric acid, and the solution was placed in a 50°C water bath. A mixed solution of 4.0 g of tetraethyl orthosilicate and 20 g of paraffin wax was added to the above aqueous solution for homogeneous emulsification at a homogenization speed of 20,000 rpm, emulsification time of 5 min, and constant temperature reaction at 50° C. for 12 h. The reaction system was cooled to room temperature, and the silica nanonet was obtained after suction filtration, washing, drying and crushing. The obtained silica nanonets were washed with deionized water and ethanol repeatedly by centrifugation or calcined at 400° C.-500° C. to remove the template agent. Mix 5 mL of water, 5 mL of imidazolium hexafluorophosphorus ionic liquid, and 2 wt % silica nanonets, and form an emulsion after vortexing. The micrograph of the emulsion is shown in image ...

Embodiment 3

[0037] Dissolve 2.5g of sodium polyvinylbenzenesulfonate in 100mL of water and mix well. The pH value of the above solution was adjusted to 10 with 25% concentrated ammonia water, and the solution was placed in a 50° C. water bath. Add a mixed solution of 20g carbon tetrachloride dissolved in 4.0g N-phenyl-3-aminopropyltrimethoxysilane to the above aqueous solution, homogeneously emulsify, homogeneous speed 20000rpm, emulsification time 5min, 50 ℃ constant temperature reaction 12h. The reaction system was cooled to room temperature, and the silica nanonet was obtained after suction filtration, washing, drying and crushing. The obtained silica nanonets were washed with deionized water and ethanol repeatedly by centrifugation or calcined at 400° C.-500° C. to remove the template agent. Mix 5mL amyl alcohol, 5mL hexafluorophosphoimidazolium ionic liquid, and 3wt% silica nanonets, and vortex to form an emulsion. The micrograph of the emulsion is shown in Figure 4 , is an alco...

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Abstract

The invention relates to the technical field of emulsifiers, in particular to a Pickering super emulsifier silicon dioxide nano net and a preparation method thereof. The preparation method comprises the following steps: 1) preparing a water phase, dissolving an emulsifier in a polar solvent, adjusting the pH value to 2-10, and adjusting the temperature to 30-100 DEG C; 2) preparing an oil phase, and dissolving reactants in a non-polar solvent; (3) mixing the water phase obtained in the step (1) and the oil phase obtained in the step (2), and quickly stirring to form an emulsion; (4) adding acid or alkali into the emulsion obtained in the step (3), and reacting the emulsion at normal temperature or under a heating condition; and (5) washing, drying and crushing the emulsion obtained in the step (4), and repeatedly centrifugally washing or roasting with deionized water and ethanol respectively to remove the emulsifier, thereby obtaining the silicon dioxide nano net. The silicon dioxide nanonet can be widely and stably emulsified into a plurality of insoluble liquid phases.

Description

technical field [0001] The invention relates to the technical field of emulsifiers, in particular to a Pickering super emulsifier silicon dioxide nano-network and a preparation method thereof. Background technique [0002] An emulsion is a dispersed system composed of two immiscible liquid phases, in which the inner phase is dispersed in the outer phase in the form of droplets. Emulsion is a thermodynamically unstable system due to the large oil / water interface area. In order to maintain stability, a third type of substance, emulsifier, must be added to the system. Traditional emulsifiers are mainly surfactants (such as cetyltrimethylammonium bromide, etc.) and polymers with surface activity (such as proteins, polysaccharides, etc.). Emulsifiers are widely used in the fields of food, cosmetics, coatings, medicine, material science and biotechnology. At the beginning of the 20th century, Ramsden found that solid particles of colloidal size can stabilize emulsions. Afterwar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18
CPCC01B33/18C01P2004/02C01P2004/03C01P2004/61Y02A40/90
Inventor 宋溪明陈奇男吴抒遥赵楠章好迪孟庆博
Owner LIAONING UNIVERSITY
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