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Preparation method of active packaging film using cellulose for controlled release

A packaging film and cellulose technology, which is applied in the field of active packaging film preparation, can solve problems such as food safety issues, and achieve the effects of improving comprehensive performance, enhancing mechanical properties and hydrophobicity, and protecting food.

Pending Publication Date: 2021-07-23
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, some plastic components may be released into packaged food, causing food safety problems

Method used

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  • Preparation method of active packaging film using cellulose for controlled release
  • Preparation method of active packaging film using cellulose for controlled release
  • Preparation method of active packaging film using cellulose for controlled release

Examples

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Embodiment Construction

[0022] The following describes the implementation of the present invention in detail by taking specific embodiments as examples in conjunction with the accompanying drawings.

[0023] Film preparation: Polyvinyl alcohol (polyvinyl alcohol)-cornstarch (cornstarch) film was prepared by solution casting method. Pure starch / polyvinyl alcohol film: Weigh 4g of polyvinyl alcohol into 50g of water, and keep stirring in a 97°C water bath for 1 hour until it is completely dissolved. Weigh 4g of cornstarch into 50g of water, stir at 97°C for 30min, slowly pour the polyvinyl alcohol solution into the starch solution, add 1.2mL of glycerin, 1.2g of citric acid, stir for 20min, take it out and ultrasonically defoam for 30min , Cast film at 60°C. Preparation of active film containing cinnamaldehyde: weigh 4 g of polyvinyl alcohol, microfibrillated cellulose (0%, 1%, 2.5%, 5%, 7.5%, 10%, 12.5%, 15% w / w) in 50 g In water, keep stirring in a 95°C water bath for 1 hour until completely dissol...

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Abstract

The invention designs a preparation method of an active packaging film using cellulose for controlled release. Starch and polyvinyl alcohol are used as film substrates, cinnamyl aldehyde is used as an active substance, microfibrillated cellulose is used as a slow-release carrier of the active substance, and the result shows that the microfibrillated cellulose can promote dissolution of cinnamyl aldehyde and enhance the mechanical property and hydrophobicity of the film, and the application value of the film is improved. The microfibrillated cellulose and the cinnamyl aldehyde with different contents are blended, the result shows that the microfibrillated cellulose with low concentration has a slow release effect on the cinnamyl aldehyde, the microfibrillated cellulose with high concentration has a promotion effect on the release of the cinnamyl aldehyde, and the release rate of the cinnamyl aldehyde is controlled by controlling the addition amount of the microfibrillated cellulose. The method is applied to food packaging, food can be protected, the shelf life of the food can be prolonged, the effect of prolonging the fresh-keeping period of the active film is achieved, and the active film is in a controllable state in the whole circulation and use process.

Description

technical field [0001] The invention belongs to the technical field of film slow-release materials, and in particular relates to a preparation method of an active packaging film using cellulose for controlled release. Background technique [0002] Due to the depletion of petroleum resources and the increasing seriousness of environmental pollution, the development of biodegradable packaging materials has become a hot spot. At the same time, some plastic components may be released into packaged food, causing food safety problems. On the other hand, active packaging films based on biodegradable materials with antibacterial or antioxidant activity, which have the ability to prevent food oxidation and inhibit microbial growth, have attracted extensive attention in recent years. Controlled-release packaging, which allows the slow and regular release of active compounds from the packaging into the food, is a more effective way to extend shelf life. After the film is prepared, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L29/04C08L3/02C08L1/02C08K5/07
CPCC08J5/18C08J2329/04C08J2303/04C08J2401/02C08K5/07
Inventor 谢晶宗琳王金锋陈晨伟王佳熙
Owner SHANGHAI OCEAN UNIV
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