Preparation method and use method of pteridium aquilinum fresh-keeping coating liquid
A technology of coating liquid and bracken, which is applied in the field of preparation of bracken fresh-keeping coating liquid, can solve problems such as restricting the industrialization development of bracken, strong tissue respiration, resource waste economy, etc., to achieve easy promotion, solve aging, low cost effect
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Embodiment 1
[0027] A method for preparing and using bracken fresh-keeping coating solution, the steps are as follows:
[0028] (1) Raw material selection: select bracken with no mechanical damage, no pests and diseases, uniform color and consistent length;
[0029] (2) Preparation of coating solution: 0.5% of pullulan, 0.2% of sodium carboxymethyl cellulose, 0.15% of tea polyphenols, and water as the balance, according to the mass fraction of 100%, are mixed and configured to form a composite film solution;
[0030] (3) film coating: put the bracken obtained in step (1) into the film coating solution obtained in step (2) for dip coating;
[0031] (4) Drying: take out the bracken after the dip coating obtained in step (3), drain the excess coating liquid, and let it dry naturally at room temperature;
[0032] (5) Storage: store the bracken obtained in step (4) in a fresh-keeping box at 4°C.
Embodiment 2
[0034] A method for preparing and using bracken fresh-keeping coating solution, the steps are as follows:
[0035] (1) Raw material selection: select bracken with no mechanical damage, no pests and diseases, uniform color and consistent length;
[0036] (2) Preparation of coating solution: 0.6% of pullulan, 0.3% of sodium carboxymethyl cellulose, 0.25% of tea polyphenols, and water as the balance are mixed to form a composite film solution according to the mass fraction of 100%.
[0037] (3) film coating: put the bracken obtained in step (1) into the film coating solution obtained in step (2) for dip coating;
[0038] (4) Drying: take out the bracken after the dip coating obtained in step (3), drain the excess coating liquid, and let it dry naturally at room temperature;
[0039] (5) Storage: store the bracken obtained in step (4) in a fresh-keeping box at 4°C.
Embodiment 3
[0041] A method for preparing and using bracken fresh-keeping coating solution, the steps are as follows:
[0042] (1) Raw material selection: select bracken with no mechanical damage, no pests and diseases, uniform color and consistent length;
[0043] (2) Preparation of coating solution: 0.7% of pullulan, 0.4% of sodium carboxymethyl cellulose, 0.35% of tea polyphenols, and water as the balance, according to the mass fraction of 100%, are mixed and configured to form a composite film solution;
[0044] (3) film coating: put the bracken obtained in step (1) into the film coating solution obtained in step (2) for dip coating;
[0045] (4) Drying: take out the bracken after the dip coating obtained in step (3), drain the excess coating liquid, and let it dry naturally at room temperature;
[0046] (5) Storage: store the bracken obtained in step (4) in a fresh-keeping box at 4°C.
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