Biodegradable controlled atmosphere film capable of prolonging shelf life of fruits and preparation method thereof

A technology of biodegradation and biodegradation of polyester, which is applied in the field of biodegradable modified atmosphere membrane and its preparation, can solve the problems of poor material safety, white pollution, and too good gas barrier performance, so as to increase production, promote separation, reduce The effect of the number of bacteria

Pending Publication Date: 2021-08-13
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing general-purpose spontaneous modified atmosphere membranes are based on refractory materials such as PP, PE, and PVC, which have problems such as poor material safety, too good gas barrier performance, and white pollution after being discarded.

Method used

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  • Biodegradable controlled atmosphere film capable of prolonging shelf life of fruits and preparation method thereof
  • Biodegradable controlled atmosphere film capable of prolonging shelf life of fruits and preparation method thereof
  • Biodegradable controlled atmosphere film capable of prolonging shelf life of fruits and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A biodegradable atmosphere-modified film for prolonging the shelf life of high-breathing-intensity fruits is made of the following components by weight: by weight, 60 parts of PBAT, 33.49 parts of PLA, 1 part of nano-titanium dioxide, three Composed of 0.01 parts of ferric chloride, 5 parts of maleic anhydride grafted PBAT and 0.5 parts of diatomaceous earth, then dry the above components at 60°C overnight, mix them evenly, and feed them into the twin-screw extruder through the feeding port. The product is pelletized after water cooling. Then, it is blown into a film by a film blowing machine, cooled and wound up to obtain the modified atmosphere film. Among them, the feed inlet temperature of the twin-screw extruder is 100°C, the temperature of the second zone to the fifth zone is 160°C; the feed inlet temperature of the film blowing machine is 145°C, and the rest section temperature is 155°C.

Embodiment 2

[0036] A biodegradable atmosphere-modified film for extending the shelf life of high-breathing-intensity fruits is made from components comprising the following parts by weight: in parts by weight, 80 parts of PBAT, 12.69 parts of polypropylene carbonate, nano-titanium dioxide 4 parts, 0.01 parts of graphene oxide, 3 parts of acrylic grafted polypropylene carbonate and 0.3 parts of silicon dioxide, then dry the above components at 60°C overnight, mix them evenly, and feed them into the twin-screw from the feeding port In the extruder, the product is water-cooled and pelletized. Then, it is blown into a film by a film blowing machine, cooled and wound up to obtain the modified atmosphere film. Among them, the feed inlet temperature of the twin-screw extruder is 90°C, the temperature of the second zone to the fifth zone is 150°C; the feed inlet temperature of the film blowing machine is 140°C, and the temperature of the rest section is 150°C.

Embodiment 3

[0038] A biodegradable atmosphere-modified film for extending the shelf life of high-breathing-intensity fruits is made from components comprising the following parts by weight: in parts by weight, 85 parts of PBAT, polysuccinic acid-adipate-butylene 5.90 parts of glycol ester, 8 parts of nano-zinc oxide, 0.001 part of nano-gold ion and nano-silver ion, 1 part of oxazoline grafted PBAT and 0.1 part of silicon dioxide, and then bake the above components overnight at 60 ° C Dry, mix evenly, put into the twin-screw extruder from the feeding port, and the product will be pelletized after water cooling. Then, it is blown into a film by a film blowing machine, cooled and wound up to obtain the modified atmosphere film. Among them, the feed inlet temperature of the twin-screw extruder is 95°C, the temperature of the second zone to the fifth zone is 155°C; the feed inlet temperature of the film blowing machine is 143°C, and the rest section temperature is 152°C.

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Abstract

The invention discloses a biodegradable modified atmosphere film capable of prolonging the shelf life of fruits and a preparation method thereof, and the biodegradable modified atmosphere film comprises the following components in parts by weight: 50-99 parts of poly (butylene adipate-co-terephthalate), 0-50 parts of polylactic acid, 1-10 parts of a photocatalytic antibacterial agent, 0.001-0.1 part of ferric ions and/or graphene oxide and/or noble metal ions, 1-5 parts of a compatilizer and 0.1-0.5 part of an anti-blocking agent. The modified atmosphere film has the advantages of being good in modified atmosphere function, good in fruit preservation effect and environmentally friendly.

Description

technical field [0001] The invention relates to a biodegradable air-conditioning film and a preparation method thereof, in particular to a biodegradable air-conditioning film for extending fruit shelf life and a preparation method thereof. Background technique [0002] Fruit is one of the types of food that humans eat daily, and some fruits can even be used as the staple food of humans. The history of bananas as the staple food in parts of Central America and Africa can be traced back hundreds of years ago. With the development of the economy, the area where fruit is the staple food is gradually decreasing, and fruit has gradually become a complementary food, but people's requirements for the quality of fruit are getting higher and higher. [0003] Fruits will still undergo respiration after picking, and respiration is accompanied by the consumption of nutrients in the fruit itself, as well as physiological phenomena such as browning and corruption, which seriously threaten ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L69/00C08L51/08C08K3/22C08K3/16C08K7/26C08K3/04C08J5/18
CPCC08J5/18C08J2367/02C08J2467/04C08J2451/08C08J2469/00C08J2467/02C08J2367/04C08K2003/2241C08K2003/2296C08K3/16C08K7/26C08K3/042
Inventor 秦舒浩王彦文李娟罗珊珊高成涛张黎胡继粗黄绍文
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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