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Device and method for modifying pectin through dielectric barrier discharge cold plasma

A technology of dielectric barrier discharge and cold plasma, applied in discharge tubes, circuits, electrical components, etc., can solve problems such as time-consuming, expensive, and unstable prices of enzyme modification methods

Active Publication Date: 2021-05-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the pectin currently on the market is prepared by chemical modification, but this preparation method is complex and harmful to the environment. High specificity, purity and activity dependence
The thermal modification method has higher production costs due to higher requirements on equipment
In recent years, ultrasound-assisted modification of pectin has also been studied, but compared with plasma technology, its operation is still cumbersome and time-consuming, requiring 30-150 minutes of ultrasound, pH adjustment, precipitation dialysis with ethanol, and then freeze-drying
Therefore, the existing pectin modification methods all have more or less disadvantages that cannot be ignored.

Method used

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  • Device and method for modifying pectin through dielectric barrier discharge cold plasma
  • Device and method for modifying pectin through dielectric barrier discharge cold plasma
  • Device and method for modifying pectin through dielectric barrier discharge cold plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The pectin solution with a concentration of 0.2% is configured through the first control chamber. After the first electric stirrer is turned on, the evenly mixed pectin solution is passed into the cold plasma treatment chamber through the valve, and the temperature between the two electrode plates is adjusted. Discharge pitch and fix height. Set the treatment voltage of the cold plasma treatment chamber to 40kV through the second control room, and the treatment time is 2min, and turn on the second electric stirrer. After the treatment is completed, the filter screen is raised, and after the filtration is completed, the plasma equipment is turned off. The filter screen is lowered, the pectin solution is passed into the drying chamber through a pipeline, and freeze-drying is selected, and the product yield of the pectin is 100%.

[0051] The molecular weight of citrus pectin before modification in this embodiment is 700kDa, the content of uronic acid is 74%, and the degre...

Embodiment 2

[0053] The pectin solution with a concentration of 0.2% is configured through the first control chamber. After the first electric stirrer is turned on, the evenly mixed pectin solution is passed into the cold plasma treatment chamber through the valve, and the temperature between the two electrode plates is adjusted. Discharge pitch and fix height. The processing voltage of the cold plasma processing chamber is set to 70 kV and the processing time is 2 min through the second control chamber, and the second electric stirrer is turned on. After the treatment, the filter screen is raised, and after the filtration is completed, the plasma equipment is turned off, the filter screen is lowered, the pectin solution is passed into the drying chamber through a pipeline, and freeze-drying is selected, and the pectin yield is 90%.

[0054] The molecular weight of citrus pectin before modification in this embodiment is 700kDa, the content of uronic acid is 74%, and the degree of esterific...

Embodiment 3

[0056] The pectin solution with a concentration of 0.4% is configured through the first control chamber. After the first electric stirrer is turned on, the evenly mixed pectin solution is passed into the cold plasma treatment chamber through a valve, and the temperature between the two electrode plates is adjusted. Discharge pitch and fix height. The processing voltage of the cold plasma processing chamber is set to 40 kV, the processing time is 2 min through the second control chamber, and the second electric stirrer is turned on. After the treatment, the filter screen is raised, and after the filtration is completed, the plasma equipment is turned off, the filter screen is lowered, the pectin solution is passed into the drying chamber through a pipeline, and freeze-drying is selected, and the yield of pectin is 100%.

[0057] The molecular weight of citrus pectin before modification in this embodiment is 700kDa, the content of uronic acid is 74%, and the degree of esterifica...

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Abstract

The invention belongs to the technical field of bioactive polysaccharide preparation, and discloses a device for modifying pectin through dielectric barrier discharge cold plasma. The device comprises a first control chamber, a solution preparation chamber, a cold plasma treatment chamber, a drying chamber and a second control chamber which are connected in sequence, wherein the first control chamber is used for controlling the solution preparation chamber to prepare a uniform pectin solution with specified concentration; the solution preparation chamber is provided with a first electric stirrer, and the pectin solution which is uniformly stirred and dispersed flows to the cold plasma treatment chamber through a control valve; the cold plasma chamber comprises a cold plasma generating device, a filter screen and a second electric stirrer, wherein the cold plasma processing chamber is connected with the second control chamber, and the second control chamber is used for controlling working parameters of the cold plasma generating device in the cold plasma processing chamber and lifting the filter screen. The pectin modifying device has the advantages of being green, safe, efficient, low in cost and the like. The invention further provides a method for modifying the pectin through dielectric barrier discharge cold plasma.

Description

technical field [0001] The invention belongs to the technical field of bioactive polysaccharide preparation, and relates to a device and method for modifying pectin by dielectric barrier discharge cold plasma. Background technique [0002] Pectin is a kind of plant-based polysaccharides, and its sources are very extensive. It usually exists in large quantities in the peels of citrus, apple, grapefruit, etc., and is the most abundant source of pectin. The FAO / WHO Joint Committee on Food Additives recommends citrus pectin as a safe natural food additive and does not limit its daily intake. At present, pectin has been widely used in food, cosmetics, chemical industry, textile, medicine and other fields, and as a dietary fiber, pectin can reduce blood sugar, serum cholesterol, stimulate macrophages, anti-inflammatory, prevent cancer, etc. Physiology and Nutritional Effects. The annual demand for pectin in the world is about 40,000 tons, and it is gradually increasing every yea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J37/32A23L33/21
CPCH01J37/32348A23L33/21A23V2002/00A23V2200/30A23V2250/5072
Inventor 孙大文潘雅雯成军虎韩忠
Owner SOUTH CHINA UNIV OF TECH
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