Syzygium aromaticum extract nanocapsule coating preservative as well as preparation method and application thereof
A film-coated preservative and nanocapsule technology, which is applied in the field of clove extract nanocapsule film-coated preservative and its preparation, can solve the problems of difficult application of industrial meat product preservation, poor solubility of clove extract, and large odor, etc. Prolonged antibacterial effect time, good comprehensive antibacterial effect, and high antibacterial effect
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Embodiment 1
[0043] Preparation of clove extract (Clove); cloves were pulverized and dried at 40° C. for 24 hours to obtain a finer powder. Then take 20 g of finer clove powder and mix with 200 mL of 95% ethanol, shake at room temperature for 24 hours to obtain a mixture, and then ultrasonically treat it under 25W power for 30 minutes. Collect the filtrate by filtration, coarse filter first, and then filter with sterile qualitative filter paper. The filtrate was concentrated under reduced pressure at a temperature of 40°C and a vacuum of 0.03MPa, and finally freeze-dried to obtain Clove, which was stored at -20°C.
Embodiment 2
[0045]The preparation method of clove extract nanocapsules (CCNPs): Weigh clove extract (Clove) 3g, CS 3g, sodium tripolyphosphate (TPP) 1g and Tween-80 (mass fraction: 0.8%) 3g.
[0046] Prepare the above raw materials into 3mg / mL CS solution, 1.0mg / mL Clove solution, 2.0mg / mL TPP solution with pH 4.5; stir the CS solution and Tween-80 at 60°C for 30 minutes to obtain a homogeneous mixture A , cooled to room temperature for later use. The ethanol solution of Clove was added to the mixture A, stirred at room temperature for 30 minutes, then the TPP solution was added dropwise, and stirred at room temperature for 60 minutes to form a CCNPs dispersion. Finally, the CCNPs dispersion was subjected to high-speed centrifugation, washing, and freeze-drying to obtain CCNPs. The centrifugal speed of the CCNPs dispersion is 12000 rpm, the centrifugal time is 20 minutes, the washing solvent is water, and the washing times are 2-3 times.
[0047] The CS solution needs to be dissolved in...
Embodiment 3
[0054] The preparation method of clove extract nanocapsules (CCNPs): Weigh clove extract (Clove) 2g, CS 2g, sodium tripolyphosphate (TPP) 0.5g and Tween-80 (mass fraction: 0.8%) 2g.
[0055] Prepare the above raw materials into 3mg / mL CS solution, 1.0mg / mL Clove solution, 2.0mg / mL TPP solution with pH 4.5; stir the CS solution and Tween-80 at 50°C for 40 minutes to obtain a homogeneous mixture A , cooled to room temperature for later use. Add Clove's ethanol solution to mixture A, stir at room temperature for 20 minutes, then add TPP solution dropwise, and stir at room temperature for 50 minutes to form a CCNPs dispersion. Finally, the CCNPs dispersion was subjected to high-speed centrifugation, washing, and freeze-drying to obtain CCNPs. The centrifugal speed of the CCNPs dispersion is 12000 rpm, the centrifugal time is 10 minutes, the washing solvent is water, and the washing times are 2-3 times.
[0056] The CS solution needs to be dissolved in 1% glacial acetic acid and ...
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