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Preparation method of yogurt adhesion-free cover

A technology of yogurt and preparation steps, which is applied in the direction of coating, metal material coating process, etc., can solve the problems of yogurt adhesion and other problems, and achieve the effect of reducing adhesion, low thermal conductivity, and high specific surface area

Inactive Publication Date: 2018-04-24
仇颖超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a yogurt non-stick cover for the defects that the current yogurt metal film cover has fast heat conduction, yoghurt fluidity is strong, and the film cover with fast heat conduction is prone to yogurt adhesion due to water evaporation. Preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Take 100mL of DMF and place it in a water bath with a magnetic stirrer. The water bath controls the temperature of the water bath to 35°C. Start the magnetic stirrer and stir at a speed of 500r / min. Add 5g of 4,4'-diaminodiphenyl to the water bath Ether, stirred for 10 minutes, then added 6g of pyromellitic anhydride, stirred and reacted for 3 hours to obtain a light yellow transparent sol, that is, polyamic acid sol; mix 10mL of tetraethyl orthosilicate and 100mL of tert-butanol in a beaker, and heat the beaker to to 50°C, add 3 mL of dilute hydrochloric acid with a mass fraction of 5% to the beaker to catalyze hydrolysis, stir for 1 hour to obtain a silica sol, add 5 mL of ammonia water with a mass fraction of 20% to the silica sol dropwise, and stir for 2 minutes, Pour it into a petri dish and seal it, and let it stand at room temperature for 3 hours to obtain a gel; wash the above gel with tert-butanol three times, age it at room temperature for 12 hours, put it in a...

example 2

[0027]Take 110mL of DMF and place it in a water bath with a magnetic stirrer. The water bath controls the temperature of the water bath to 38°C. Start the magnetic stirrer and stir at a speed of 525r / min. Add 6g of 4,4'-diaminodiphenyl to the water bath Ether, stirred for 13min, then added 7g of pyromellitic anhydride, stirred for 3.5h to obtain a light yellow transparent sol, that is, polyamic acid sol; mix 13mL of tetraethyl orthosilicate and 105mL of tert-butanol in a beaker, and heat the beaker Raise the temperature to 53°C, add 4mL of dilute hydrochloric acid with a mass fraction of 5% to the beaker to catalyze hydrolysis, stir for 1.5h to obtain a silica sol, add 6mL of ammonia water with a mass fraction of 20% to the silica sol, and stir for 2.5 After 1 min, pour it into a petri dish and seal it, and let it stand at room temperature for 3.5 hours to obtain a gel; wash the above gel 4 times with tert-butanol, age it at room temperature for 13 hours, put it into a freeze d...

example 3

[0029] Take 120mL of DMF and place it in a water bath with a magnetic stirrer. The water bath controls the temperature of the water bath to 40°C. Start the magnetic stirrer and stir at a speed of 550r / min. Add 7g of 4,4'-diaminodiphenyl to the water bath Ether, stirred for 15 minutes, then added 8g pyromellitic anhydride, stirred and reacted for 4 hours to obtain a light yellow transparent sol, that is, polyamic acid sol; mix 15mL tetraethyl orthosilicate and 110mL tert-butanol in a beaker, heat the beaker To 55°C, add 5 mL of dilute hydrochloric acid with a mass fraction of 5% to the beaker to catalyze hydrolysis, stir for 2 hours to obtain a silica sol, add 7 mL of ammonia water with a mass fraction of 20% to the silica sol dropwise, and stir for 3 minutes, Pour it into a petri dish and seal it, and let it stand at room temperature for 4 hours to obtain a gel; wash the above gel with tert-butanol 5 times, age it at room temperature for 14 hours, put it in a freeze dryer, and ...

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Abstract

The invention relates to the field of packaging material preparation, in particular to a method for preparing non-stick yogurt lids. In the present invention, the self-made polyamic acid sol is mixed with tetraethyl orthosilicate and tert-butanol, and after aging, it is mixed and dispersed with silica sol to obtain a composite sol, and aluminum foil is immersed in the composite sol to form a nanometer-sized hybrid film , the silicon hydroxyl group of silica in the hybrid film is destroyed, and the hydrophilic property decreases, so that the yogurt cover has hydrophobic properties, thereby reducing the adhesion of yogurt on the cover, and the silica freeze-dried gel has a high specific surface area and high porosity , leading to low thermal conductivity, aluminum hydroxide powder and silica lyophilized gel are mixed to obtain mixed rubber powder, so that the whole yogurt non-stick cover forms a stable system, and the yogurt cover with high specific surface area has an inhibitory effect on the evaporation of water in yogurt , so that the solid content of the yogurt is not easy to deposit, and the density of the yogurt is uniform when it flows, so that the yogurt will not stick to the lid, and the application prospect is broad.

Description

technical field [0001] The invention relates to the field of packaging material preparation, in particular to a method for preparing non-stick yogurt lids. Background technique [0002] In recent years, as a novel, delicious and healthy drink, yogurt has been more and more widely used in people's daily life. Yogurt not only retains all the advantages of milk, but also develops its strengths and circumvents its weaknesses in some aspects through processing, becoming a nutritional and health product more suitable for human beings. It can not only promote the secretion of gastric juice, increase appetite, promote and strengthen digestion, but also reduce the production of certain carcinogens, so it has anti-cancer effects. [0003] I believe that when you drink yogurt, you must have encountered a thick layer of yogurt on the yogurt cover. It is a pity and waste to throw it away, and it is unhygienic and unsightly to lick it, which brings consumers No small trouble. Why is yo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D7/61C08G73/10C23C26/00
CPCC09D179/08C08G73/1071C08K7/26C08K2003/2227C23C26/00
Inventor 仇颖超何少雄张建初
Owner 仇颖超
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