Preparation method of bisporus preservative film masterbatch containing rare earth complex
The technology of rare earth complex and rare earth compound is applied in the field of preparation of fresh-keeping film masterbatch of Agaricus bisporus, which can solve the problems of poor fresh-keeping effect and high cost of fresh-keeping packaging of Agaricus bisporus, and achieve the effects of enhancing antibacterial and fresh-keeping effect, material safety and cost reduction.
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Embodiment 1
[0037] The components of the masterbatch consist of 6.14kg of linear low-density polyethylene, 1.2kg of tourmaline powder, 2.2kg of rare earth complexes, 0.25kg of diatomaceous earth, 0.09kg of aluminate, and 0.12kg of sodium stearate.
[0038] Masterbatch is prepared according to the following steps:
[0039] 1. Preparation of rare earth complexes
[0040] (1) Dissolve 2kg chitin in 60L acetic acid solution, stir evenly, add 80L methanol, the solution is no longer viscous, add 1L acetic anhydride, react at 30°C for 1h, add the viscous liquid obtained from the reaction to 150 In ethanol, a precipitate is formed, the solid is filtered out, washed three times with absolute ethanol, dissolved in acetic acid solution, and the insoluble matter is filtered off to obtain an acetylated chitosan solution.
[0041] (2) Weigh a total of 2kg of lanthanum nitrate, yttrium nitrate, neodymium nitrate, and cerium nitrate respectively according to the molar ratio of lanthanum, yttrium, neodym...
Embodiment 2
[0048] The components of the masterbatch consist of 6.1kg of linear low-density polyethylene, 1.0kg of tourmaline powder, 2.4kg of rare earth complexes, 0.3kg of diatomaceous earth, 0.10kg of aluminate, and 0.10kg of sodium stearate.
[0049] Masterbatch is prepared according to the following steps:
[0050] 1. Preparation of rare earth complexes
[0051] (1) Dissolve 2kg chitin in 60L acetic acid solution, stir evenly, add 80L methanol, the solution is no longer viscous, add 1L acetic anhydride, react at 30°C for 1h, add the viscous liquid obtained from the reaction to 150 In ethanol, a precipitate is formed, the solid is filtered out, washed three times with absolute ethanol, dissolved in acetic acid solution, and the insoluble matter is filtered off to obtain an acetylated chitosan solution.
[0052] (2) Weigh a total of 2kg of lanthanum nitrate, yttrium nitrate, neodymium nitrate, and cerium nitrate respectively according to the molar ratio of lanthanum, yttrium, neodymiu...
Embodiment 3
[0059] The components of the masterbatch consist of 6.41kg of linear low-density polyethylene, 1.1kg of tourmaline powder, 2.1kg of rare earth complexes, 0.2kg of diatomaceous earth, 0.08kg of aluminate, and 0.11kg of sodium stearate.
[0060] Masterbatch is prepared according to the following steps:
[0061] 1. Preparation of rare earth complexes
[0062] (1) Dissolve 2kg chitin in 60L acetic acid solution, stir evenly, add 80L methanol, the solution is no longer viscous, add 1L acetic anhydride, react at 30°C for 1h, add the viscous liquid obtained from the reaction to 150 In ethanol, a precipitate is formed, the solid is filtered out, washed three times with absolute ethanol, dissolved in acetic acid solution, and the insoluble matter is filtered off to obtain an acetylated chitosan solution.
[0063] (2) Weigh a total of 2kg of lanthanum nitrate, yttrium nitrate, neodymium nitrate, and cerium nitrate respectively according to the molar ratio of lanthanum, yttrium, neodymi...
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