Preparation method of liquid crystal gel super-stable foam system

A technology for stabilizing foam and system, applied in the field of foam system, can solve the problems of easy rupture and stratification, difficult application, stop, etc., and achieves the effect of delaying the process of bubble dissolution and coalescence, improving stability and simple method.

Active Publication Date: 2022-02-01
XI'AN PETROLEUM UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The industrialization and commercialization of ultra-stable foam systems are mainly limited by two bottlenecks: one is the lack of efficient and feasible industrial preparation methods, and the other is the stability of the foam dispersion system
The huge specific surface area of ​​the foam system makes this dispersion system extremely unstable, prone to cracking and delamination, and it is difficult to be used in food, medicine and other industries, but only limited to basic laboratory research

Method used

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  • Preparation method of liquid crystal gel super-stable foam system
  • Preparation method of liquid crystal gel super-stable foam system
  • Preparation method of liquid crystal gel super-stable foam system

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The preparation process of the present invention is:

[0026] a. Preparation of polyglycerol:

[0027] Add 0.75g of glycerol into a three-necked flask equipped with a stirring bar, nitrogen gas tube, thermometer, and condenser tube, weigh 5g of NaOH and dissolve it in 50mL of water, add it, heat it to 80°C to make it react, and pass nitrogen gas to protect the reaction. Connect a measuring cylinder under the condenser tube, observe the water output, stop heating when it reaches 25mL, and continue to pass nitrogen, but when the temperature drops below 160°C, polyglycerol is obtained.

[0028] b. Synthesis of carbon chain fatty acid polyglycerol esters in surfactants:

[0029] Add 10mL of polyglycerin to a three-necked flask equipped with a stirring bar, nitrogen gas tube, thermometer, and condenser tube, weigh 5mL of lauric acid and 5mL of capric acid, heat to 70°C to melt, add to the flask, and then add 1g of NaOH solution is used as a catalyst, stir and heat up to 22...

Embodiment 1

[0045] A preparation method of a liquid crystal gel ultra-stable foam system prepared by a single nonionic surfactant is as follows:

[0046] Step 1: First, slowly raise the temperature of the fatty acid polyglyceride aqueous solution with a mass fraction of 1% to a constant temperature of 60°C; secondly, use a stirrer to stir so that the stirring speed is controlled at 3000rpm for 5min, when the solution is translucent and uniform After dispersing the system, cool it down to room temperature (25°C) naturally, and set it aside.

[0047] Step 2: First take 100mL of the surfactant fatty acid polyglycerol ester-water mixture after the above pretreatment, and then use high-speed stirring to foam, so that the stirring speed is controlled at 8000rpm for 10min, and the volume of the liquid can be observed to expand, forming a white A foam whose shape is similar to that of an emulsion. Record the foaming amount of the sample after stirring.

[0048] The particle size of foam bubbles...

Embodiment 2

[0051] A preparation method of a liquid crystal gel ultra-stable foam system prepared by a single nonionic surfactant is as follows:

[0052] Step 1: First, slowly raise the temperature of the fatty acid polyglyceride aqueous solution with a mass fraction of 2% to a constant temperature of 60°C; secondly, use a stirrer to stir so that the stirring speed is controlled at 4000rpm for 5min, when the solution is translucent and uniform After dispersing the system, cool it down to room temperature (25°C) naturally, and set it aside.

[0053] Step 2: First take 100mL of the surfactant fatty acid polyglycerol ester-water mixture after the above pretreatment, and then use high-speed stirring to foam, so that the stirring speed is controlled at 9000rpm for 10min, and the volume of the liquid can be observed to expand, forming a white A foam whose shape is similar to that of an emulsion. Record the foaming amount of the sample after stirring.

[0054] The particle size of foam bubbles...

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Abstract

A preparation method of a liquid crystal gel super-stable foam system comprises the following steps: stirring a medium-chain fatty acid polyglycerol ester aqueous solution under heating until the medium-chain fatty acid polyglycerol ester aqueous solution becomes a semitransparent uniform dispersion system, so as to obtain a surfactant fatty acid polyglycerol ester-water mixed solution; and foaming the surfactant fatty acid polyglycerol ester-water mixed solution while stirring to obtain the liquid crystal gel super-stable foam system. The super-stable foam with the particle size of 40-70 microns prepared by the invention can be kept stable for 10 months or longer, and no obvious defoaming phenomenon occurs. The method for preparing the stable micro-foam from the single nonionic surfactant is simple, convenient, rapid and low in cost, and a new way is explored for preparation of the super-stable foam and application of the super-stable foam in the fields of daily chemicals, food industry, medicine delivery and the like.

Description

technical field [0001] The invention relates to a foam system, in particular to a preparation method of a liquid crystal gel ultra-stable foam system. Background technique [0002] Foam is a dispersed system formed by dispersing insoluble gas in the liquid phase. Its appearance is like a honeycomb, in which the liquid phase is the continuous phase and the gas phase is the dispersed phase. In order to determine the state of the phase in this mixed system, the most commonly used representation method is the Mitchell method. Pure liquids cannot form highly stable foams. Although air bubbles will be generated in distilled water, the bubbles will disappear immediately after the gas injection is stopped; Injection of air, or high-speed agitation of the two can produce stable foam, so the foam formation condition must be composed of more than two phases. Foaming agents currently used in oil fields are mainly composed of surfactants, and a complete foam system mainly includes foam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K23/44B01J13/00
CPCB01J13/0065
Inventor 燕永利张晓牛梦龙姜选选牛红博
Owner XI'AN PETROLEUM UNIVERSITY
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