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Intercalator of slow-releasing food preservative substance, and its prepn. method

A technology for food preservatives and intercalation materials, which is applied in the fields of food preservation, food science, and applications, and can solve problems such as no reports of preservative molecular intercalation.

Inactive Publication Date: 2007-02-14
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on antiseptic molecular intercalation LDHs materials

Method used

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  • Intercalator of slow-releasing food preservative substance, and its prepn. method
  • Intercalator of slow-releasing food preservative substance, and its prepn. method
  • Intercalator of slow-releasing food preservative substance, and its prepn. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A. Use deionized water and Zn(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O and sorbic acid SA prepare 300ml mixed solution, make Zn(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 The molar concentrations of O and SA were 0.4, 0.2 and 0.8 mol / L respectively; another 300ml NaOH alkali solution was prepared and the molar concentration of NaOH was 2 mol / L.

[0038] B.N. 2 Under protection, the alkali solution is gradually added dropwise into the vigorously stirred mixed solution, and the pH value of the slurry is controlled to be 7-9 after the dropwise addition is completed.

[0039] C. Put the resulting slurry in N 2 Crystallize at 60°C for 18 hours under protection, then filter with suction, wash with water until neutral, and dry at room temperature for 2 days to obtain SA-ZnAl-LDHs. The water used in the process is decarbonized deionized water.

[0040] The crystal structure of the product is analyzed by XRD, showing that it has a typical organic intercalation hydrotalcite mat...

Embodiment 2

[0047] With deionized water, Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Al(NO 3 ) 3 9H 2 O and lactic acid (LA) prepare 300ml mixed solution, make Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Al(NO 3 ) 3 9H 2 The molar concentrations of O and LA were 0.4, 0.1, 0.1 and 1.0 mol / L, respectively. Other steps are the same as in Example 1 to obtain LA-ZnFeAl-LDHs.

[0048] The crystal structure of the product is analyzed by XRD, showing that it has a typical organic intercalation hydrotalcite material crystal structure ( figure 2 )

[0049] The product is analyzed by TG / DTA, ICP and elemental analysis methods, and the main composition of the obtained product is as follows:

[0050] Zn 31.8%

[0051] Fe 8.1%

[0052] Al 3.8%

[0053] LA 26.2%

[0054] This example demonstrates that preservative LA intercalated LDHs can be obtained by co-precipitation method.

Embodiment 3

[0056] The preservative SA in Example 1 was replaced with LA, and the other steps remained unchanged to prepare LA-ZnAl-LDHs.

[0057] The product is analyzed by TG / DTA, ICP and elemental analysis methods. The main components of the product are as follows:

[0058] Zn 33.1%

[0059] Al 7.6%

[0060] LA 28.6%

[0061] Get each 0.5g of the product of embodiment 2 and embodiment 3, be dispersed in the 100ml sodium carbonate solution in the Erlenmeyer flask respectively. Then put the Erlenmeyer flask into a water bath constant temperature shaker and shake continuously. A small amount of suspension was taken at a certain time interval, and after the suspension was centrifuged, the concentration of LA in the supernatant was determined by reverse-phase high-performance liquid chromatography. In this way, the performance of the product for slowly releasing LA was investigated. The rate figure that the product of embodiment 2 and embodiment 3 releases LA in sodium carbonate soluti...

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Abstract

An intercalated material for the slow-releasing antiseptic of food is prepared from the laminar anionic LDHs and FP through depositing to intercalate the FP between the layers of LDHs. Its advantages are long release time (1-60 days), and easy control of material properties.

Description

Technical field: [0001] The invention relates to a slow-release food preservative material and a preparation method thereof. Background technique: [0002] Food Preservative (Food Preservative, abbreviated as FP) is the main category of food additives, mainly used to inhibit and prevent the growth of various invertases, bacteria, molds, and fungi, to avoid food contamination and deterioration, to ensure the freshness of food quality, and to improve food preservation performance. , Extend the shelf life of food. FP solves the needs of food quality, color, aroma, taste, nutritional value, preservation and processing technology. If the amount of FP added is insufficient, the expected effect cannot be achieved, but if the amount added exceeds the allowable range, it will have a certain toxic effect on the human body. Therefore, a series of problems such as the appearance of peculiar smell, the amount and toxicity of FP added, the stability and safety of physiologically active ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L3/3508A23L3/00
Inventor 段雪张慧孟锦宏
Owner BEIJING UNIV OF CHEM TECH
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