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A kind of preparation method of sweet cherry fresh-keeping film masterbatch containing rare earth complex

A rare earth complex and rare earth compound technology, applied in the field of preparation of sweet cherry fresh-keeping film masterbatch, can solve problems such as problems that have not been solved, and achieve the effects of enhancing antibacterial fresh-keeping effect, abundant resources and material safety

Inactive Publication Date: 2017-11-24
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many researches on the preservation of sweet cherries in recent years, in actual production, there are still many problems that have not been resolved.

Method used

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  • A kind of preparation method of sweet cherry fresh-keeping film masterbatch containing rare earth complex
  • A kind of preparation method of sweet cherry fresh-keeping film masterbatch containing rare earth complex
  • A kind of preparation method of sweet cherry fresh-keeping film masterbatch containing rare earth complex

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The components of the masterbatch consist of 5.89 kg of linear low-density polyethylene, 1.2 kg of tourmaline powder, 2.4 kg of rare earth complexes, 0.3 kg of diatomaceous earth, 0.11 kg of oleic acid amide, and 0.10 kg of sodium stearate.

[0033] Masterbatch is prepared according to the following steps:

[0034] 1. Preparation of rare earth complexes

[0035] (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 1 hour, then add the viscous liquid obtained from the reaction to 150L 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.

[0036] (2) Weigh a total of 2kg of lanthanum nitrate, yttrium nitrate, neodymium nitrate and cerium nitrate respectively according to the molar ratio of lanth...

Embodiment 2

[0043] The components of the masterbatch consist of 5.93 kg of linear low-density polyethylene, 1.4 kg of tourmaline powder, 2.2 kg of rare earth complexes, 0.25 kg of diatomaceous earth, 0.10 kg of oleic acid amide, and 0.12 kg of sodium stearate.

[0044] Masterbatch is prepared according to the following steps:

[0045] 1. Preparation of rare earth complexes

[0046] (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 1 hour, then add the viscous liquid obtained from the reaction to 150L 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.

[0047] (2) Weigh a total of 2kg of lanthanum nitrate, yttrium nitrate, neodymium nitrate and cerium nitrate respectively according to the molar ratio of lant...

Embodiment 3

[0054] The components of the masterbatch consisted of 5.77 kg of linear low density polyethylene, 1.3 kg of tourmaline powder, 2.4 kg of rare earth complexes, 0.30 kg of diatomaceous earth, 0.12 kg of oleic acid amide, and 0.11 kg of sodium stearate.

[0055] Masterbatch is prepared according to the following steps:

[0056] 1. Preparation of rare earth complexes

[0057] (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 1 hour, then add the viscous liquid obtained from the reaction to 150L 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.

[0058] (2) Weigh a total of 2kg of lanthanum nitrate, yttrium nitrate, neodymium nitrate and cerium nitrate respectively according to the molar ratio of la...

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Abstract

The invention relates to a preparation method of sweet cherry fresh-keeping film master batch containing a rare earth complex. LLDPE serves as carrier resin, tourmaline powder, the rare earth complex, kieselguhr, oleamide and sodium stearate are added, coating dispersion, interface modification, material mixing and extruding granulation are carried out, and the sweet cherry fresh-keeping film master batch is obtained. In the rare earth complex feature, the molar ratio of lanthanum ions to yttrium ions to samarium ions to cerium ions is (2.95<=w<=3.00):(0.55<=x<=0.60):(0.85<=y<=0.95):(1.15<=z<=1.25). After a film is prepared by adding the master batch prepared according to the method into LLDPE resin at the proportion of 6-8% and then carrying out blow molding, the film is applied to sweet cherry fresh-keeping packaging and can restrain respiration intensity and surface microorganism growth in the storage process, retard the softening process and prolong the freshness lifetime by 4-6 days at the normal temperature.

Description

technical field [0001] The invention relates to a preparation method of a functional plastic film master batch, in particular to a preparation method of a sweet cherry fresh-keeping film master batch containing a rare earth complex. Background technique [0002] Sweet cherry (Prunus avium L.) is a plant of the subgenus Prunus in the Rosaceae family. It is one of the earliest fruit-ripening tree species among deciduous fruit trees. It is known as "the first branch of spring fruit". Its fruit is bright in color, rich in fragrance, rich in nutrition and has certain medical and health care value, so it is very popular among domestic and foreign consumers. However, due to the soft flesh, thin skin and juicy sweet cherry fruit, it is a perishable fruit that is not resistant to storage and transportation. In addition, when it is harvested and marketed during the high temperature season, it is very easy to have dry stems, browning, Phenomena such as fruit softening, rot and deterio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L5/08C08K13/02C08K3/38C08K3/34C08K5/20C08K5/098B29C47/92B29C48/92
CPCB29C48/92B29C2948/92704C08K2201/003C08L23/0815C08L2203/16C08L5/08C08K13/02C08K3/38C08K3/34C08K5/20C08K5/098
Inventor 陈潇川游瑞云周婷卢圣钊杨裕金高宇菥
Owner FUJIAN NORMAL UNIV
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