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Nano α-fe 2 o 3 Functionally modified PVA-based composite coating film fresh-keeping packaging 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. Effects of water resistance and film-forming barrier properties

Inactive Publication Date: 2016-11-23
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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  • Nano α-fe <sub>2</sub> o <sub>3</sub> Functionally modified PVA-based composite coating film fresh-keeping packaging material and preparation method thereof
  • Nano α-fe <sub>2</sub> o <sub>3</sub> Functionally modified PVA-based composite coating film fresh-keeping packaging material and preparation method thereof
  • Nano α-fe <sub>2</sub> o <sub>3</sub> Functionally modified PVA-based composite coating film fresh-keeping packaging material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Nano α-Fe 2 o 3 Response Surface Surface Test of Functionally Modified PVA-Based Composite Coated Fresh-keeping Packaging Materials: Nano α-Fe 2 o 3 and beeswax dosage according to the response surface experiment design in the following table

[0026] Table 1 Response Surface Experiment Design of α-Fe2O3 and Beeswax Addition of Composite Coating Materials

[0027]

[0028] Add nano α-Fe in 50g / L PVA aqueous solution 2 o 3 (disperse in 10ml of absolute ethanol), then add polyglycerol ester, place in an ultrasonic water bath, and ultrasonicate for 15min under the condition of power density 65W / L, nanometer α-Fe 2 o 3 After being evenly dispersed in the PVA solution, the mixed solution was stirred and heated to 85°C for a constant temperature reaction until the PVA was completely dissolved, and then the monoglyceride was added to the melted beeswax (polyglycerol: monoglyceride = 1:0.03), and the amount added accounted for 1% of the beeswax 60% of th...

Embodiment 2

[0034] Embodiment 2: the nano-α-Fe of 0.43g / L 2 o 3 Disperse in 10ml absolute ethanol, then add to 50g / L PVA aqueous solution, add a kind of surfactant polyglycerol ester 0.42g / L (W / L H2O ), placed in an ultrasonic water bath, ultrasonicated for 25 minutes under the condition of a power density of 65W / L, to make nano-α-Fe 2 o 3 Uniformly disperse in polyvinyl alcohol aqueous solution; stir and heat the mixture to 85°C for constant temperature reaction until PVA is completely dissolved, then add 1.26g / L of another surfactant, monoglyceride, into the melted 7.36g / L beeswax. Then the mixed PVA aqueous solution was slowly poured into beeswax three times, and the cross-linking reaction was stirred at a constant temperature of 85°C for 90 minutes; then stirred and cooled to room temperature to prepare a nano-modified composite coating packaging material, and the performance of the composite coating fresh-keeping packaging material was tested. Film-forming performance, the water v...

Embodiment 3

[0035] Embodiment 3: the nano-α-Fe of 0.43g / L 2 o 3 Disperse in 10ml of absolute ethanol, then add it to 50g / L PVA aqueous solution, and ultrasonicate for 25 minutes under the condition of power density 65W / L to make nano-α-Fe 2 o 3 Disperse evenly in polyvinyl alcohol aqueous solution; stir and heat the mixture to 85°C for constant temperature reaction until PVA is completely dissolved, then stir and cool to room temperature to prepare nano-α-Fe 2 o 3 Modified composite coating film packaging material.

[0036] In the PVA aqueous solution of 50g / L, add a kind of surfactant polyglycerol ester 0.42g / L (W / L H2O ), placed in an ultrasonic water bath, ultrasonicated for 25 minutes under the condition of a power density of 65W / L, the mixed solution was stirred and heated to 85°C and reacted at a constant temperature until the PVA was completely dissolved, and another surfactant monoglyceride 1.26g / L was added to the Melted 7.36g / L beeswax. Then the mixed PVA aqueous solution ...

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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, belonging to the technical field of food packaging materials, and in particular to a method using nano-α-Fe 2 o 3 A functionally modified PVA-based composite coating film fresh-keeping packaging material and a preparation method thereof. Background technique: [0002] It is a new hotspot in the research and development of food fresh-keeping packaging in recent years by using functional nanoparticles and environmentally friendly or degradable polymer materials to couple and compound modification to develop new functional nano-preservation packaging materials with antibacterial fresh-keeping or high barrier properties. The fresh-keeping effect of its packaging depends on the choice of base film material, the combination of functional nanoparticles and the preparation method. Polyvinyl alcohol (PVA) is widely used in f...

Claims

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Application Information

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Patent Type & Authority Patents(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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