Nanometer alpha-Fe2O3 functional modified PVA-base composite coated fresh-keeping package material and preparation method thereof

A technology for coating fresh-keeping and packaging materials, which is applied in the field of food packaging materials, can solve the problems of yellowing on the surface of coating packaging of egg products, poor water resistance and moisture resistance, etc. The effect of water resistance and film-forming barrier properties

Inactive Publication Date: 2015-01-14
CHANGSHU YIHAO FOOD PACKAGING MATERIAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the invention is to: develop a kind of adopting nano α-Fe 2 o 3 Functionally modified PVA-beeswax composite film fresh-keeping packaging new material and its preparation method, using PVA and beeswax as the matrix for emulsification and compounding, and using functional nano-α-Fe 2 o 3 Modify PVA-based composite materials to solve the problems of poor water resistance and moisture resistance of PVA-based composite materials used as coating film fresh-keeping packaging, long-term storage and yellowing of the surface of coated film packaging for egg products, and provide new materials for visible light Catalytic antibacterial and fresh-keeping function

Method used

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  • Nanometer alpha-Fe2O3 functional modified PVA-base composite coated fresh-keeping package material and preparation method thereof
  • Nanometer alpha-Fe2O3 functional modified PVA-base composite coated fresh-keeping package material and preparation method thereof
  • Nanometer alpha-Fe2O3 functional modified PVA-base composite coated fresh-keeping package material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: Nano α-Fe 2 O 3 Functional modified PVA-based composite coating film fresh-keeping packaging material preparation response surface test: nano α-Fe 2 O 3 And the dosage of beeswax is designed according to the response surface test in the table below

[0026] Table 1 Composite coating material α-Fe2O3, beeswax added amount response surface experimental design

[0027]

[0028] Add nano α-Fe to 50g / L PVA aqueous solution 2 O 3 (Dispersed in 10ml of absolute ethanol), then add polyglycerol ester, place in an ultrasonic water bath, sonicate for 15min under the condition of power density 65W / L, nano-α-Fe 2 O 3 After being uniformly dispersed in the PVA solution, the mixture is stirred and heated to 85°C to react at a constant temperature until the PVA is completely dissolved, and then the monoglyceride is added to the melted beeswax (polyglycerol: monoglyceride = 1:0.03), the added amount accounts for the beeswax 60% of the mass, the PVA mixed solution was slowly poured ...

Embodiment 2

[0034] Example 2: Add 0.43g / L nano α-Fe 2 O 3 Disperse into 10ml of absolute ethanol, then add to 50g / L of PVA aqueous solution, add a surfactant polyglycerol ester 0.42g / L (W / L H2O ), placed in an ultrasonic water bath, sonicated for 25 minutes at a power density of 65W / L to make the nano α-Fe 2 O 3 Disperse uniformly in the polyvinyl alcohol aqueous solution; the mixed solution is stirred and heated to 85°C to react at a constant temperature until the PVA is completely dissolved, and then another surfactant monoglyceride 1.26g / L is added to the melted 7.36g / L beeswax. Then, the mixed PVA aqueous solution was slowly poured into beeswax three times, and the crosslinking reaction was stirred for 90 minutes at a constant temperature of 85°C; then stirred and cooled to room temperature to prepare a nano-modified composite coating packaging material, and testing the composite coating fresh-keeping packaging material Film-forming efficiency, the moisture permeability is 401.80g / m 2 *h...

Embodiment 3

[0035] Example 3: Add 0.43g / L nano α-Fe 2 O 3 Disperse into 10ml absolute ethanol, then add to 50g / L PVA aqueous solution, sonicate for 25 minutes under the power density of 65W / L to make nano α-Fe 2 O 3 Disperse uniformly in the polyvinyl alcohol aqueous solution; the mixture is stirred and heated to 85°C to react at a constant temperature until the PVA is completely dissolved, then stirred and cooled to room temperature to prepare nano-α-Fe 2 O 3 Modified composite coating film packaging material.

[0036] In the 50g / L PVA aqueous solution, add a surfactant polyglycerol ester 0.42g / L (W / L H2O ), placed in an ultrasonic water bath, sonicated for 25 minutes at a power density of 65W / L, the mixture was stirred and heated to 85°C to react at a constant temperature until the PVA was completely dissolved, and another surfactant monoglyceride 1.26g / L was added to In the melted 7.36g / L beeswax. Then, the mixed PVA aqueous solution was slowly poured into beeswax in three times, and the c...

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Abstract

The invention relates to a nanometer alpha-Fe2O3 functional modified polyvinyl alcohol(PVA)-base composite coated fresh-keeping package material and a preparation method thereof, and belongs to the field of food fresh-keeping packaging material. The PVA-base coated fresh-keeping package material is prepared through emulsification and combination of the following composition in an aqueous solution: based on 1 L of water, 40-70 g of PVA, 4-10 g of beewax, 0.2g-0.8 g of nanometer alpha-Fe2O3, and a surfactant accounting for 20%-60% by mass of beewax. The preparation method comprises: performing ultrasonic mixing and constant-temperature reaction on nanometer alpha-Fe2O3 and PVA, and also adding the surfactant for crosslinking reaction, so as to prepare a composite coating liquid. The nanometer alpha-Fe2O3 functional modified PVA-base composite coated fresh-keeping package material is substantially reduced in formed-film moisture penetrability by 70% compared with that a PVA single film, and has visible-light-catalyzed antibacterial fresh-keeping effect.

Description

Technical field: [0001] The invention relates to a composite coating film fresh-keeping packaging material for food packaging and a preparation method thereof, and belongs to the technical field of food packaging materials, and specifically relates to a nano-α-Fe 2 O 3 Functional modified PVA-based composite coating film fresh-keeping packaging material and preparation method thereof. Background technique: [0002] The use of functional nanoparticles and environmentally friendly or degradable polymer materials for coupling and compound modification to develop new functional nano-preservation packaging materials with antibacterial and fresh-keeping or high barriers is a new hot spot in the research and development of food preservation packaging in recent years. Its packaging preservation effect depends on the choice of the basic film material, the combination of functional nanoparticles and the preparation method. Polyvinyl alcohol (PVA) is widely used in food packaging because of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L91/06C08L71/00C08K5/103C08K3/22B65D65/38
Inventor 章建浩李璨刘桂超刘瑶王佳媚
Owner CHANGSHU YIHAO FOOD PACKAGING MATERIAL TECH
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