Fresh-keeping packaging material with composite coating of PVA-liquid paraffin and with combined modification of nanosized TiO2-SiO2 and preparation method thereof

A liquid paraffin and coating film preservation technology, which is applied in the field of food packaging materials, can solve the problems of surface yellowing, poor water resistance and moisture resistance, etc., to reduce moisture permeability, improve water resistance and film barrier performance, and change the permeation path Effect

Inactive Publication Date: 2012-09-12
CHANGSHU YIHAO FOOD PACKAGING MATERIAL TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a polyethylene modified by combination of nano-TiO2 -SiO2 Alcohol (PVA)-liquid paraffin composite coating fresh-keeping packaging material and its preparation method, using PVA and liquid paraffin as the matrix, using surfactants for emulsification and crosslinking, and using different functiona

Method used

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  • Fresh-keeping packaging material with composite coating of PVA-liquid paraffin and with combined modification of nanosized TiO2-SiO2 and preparation method thereof
  • Fresh-keeping packaging material with composite coating of PVA-liquid paraffin and with combined modification of nanosized TiO2-SiO2 and preparation method thereof
  • Fresh-keeping packaging material with composite coating of PVA-liquid paraffin and with combined modification of nanosized TiO2-SiO2 and preparation method thereof

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Embodiment 1

[0039] Nano TiO 2 , SiO 2 Added to a concentration of 50 g / L H2O PVA (w / v 水 ) in an aqueous solution, placed in an ultrasonic water bath, and ultrasonicated for 15 minutes under the condition of a power density of 65W / L, nano-TiO 2 and SiO 2 After being evenly dispersed in the PVA solution, the mixed solution was stirred and heated to 88°C for a constant temperature reaction until the PVA was completely dissolved, and then the compound surfactant (Span80: Tween80=1:1 (w / w), the amount added accounted for 40% of the liquid paraffin (w / w)) Add a certain amount of liquid paraffin, heat and stir in a water bath to 88°C and mix evenly, mix the liquid paraffin and PVA solution, and add glutaraldehyde 5g / L at the same time H2O , cross-linking reaction at a constant temperature of 88°C for 50min; stirring and cooling to room temperature, and then preparing a nano-modified composite coating film packaging material.

[0040] Nano-TiO 2 , SiO 2 The dosage is designed according to...

Embodiment 2

[0047] 0.2g / L H2O nano-SiO 2 , 0.15g / L H2O TiO 2 Added to a concentration of 40g / L H2O PVA aqueous solution, placed in an ultrasonic water bath, ultrasonic 15min under the condition of power density 58W / L, nano-TiO 2 and SiO 2 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 compound surfactant (Span80: Tween80=1:0.7 (w / w), the amount added accounted for 20% of the liquid paraffin (w / w)) add 4g / L H2O In liquid paraffin, heat and stir in a water bath to 85°C and mix evenly, mix liquid paraffin and PVA solution, and add glutaraldehyde 4 g / L at the same time H2O , cross-linking reaction at a constant temperature of 85°C for 40 minutes; then stirred and cooled to room temperature to prepare a nano-modified composite coating film packaging material. The film-forming efficiency of the composite coating film fresh-keeping packaging materia...

Embodiment 3

[0049] 0.5g / L H2O nano-SiO 2 , 0.4g / L H2O TiO 2 Added to a concentration of 70g / L H2O PVA aqueous solution, placed in an ultrasonic water bath, ultrasonic 25min under the condition of power density 70W / L, nano-TiO 2 and SiO 2 After being evenly dispersed in the PVA solution, the mixed solution was stirred and heated to 95°C for a constant temperature reaction until the PVA was completely dissolved, and then the compound surfactant (Span80: Tween80=1:1.7 (w / w), the amount added accounted for 50% of the liquid paraffin Add (w / w)) to 1% liquid paraffin, heat and stir in a water bath to 95°C and mix evenly, mix the liquid paraffin and PVA solution, and add glutaraldehyde 6 g / L at the same time H2O , cross-linking reaction at a constant temperature of 95°C for 60 minutes; then stirred and cooled to room temperature to prepare a nano-modified composite coating film packaging material. The film-forming efficiency of the composite coating film fresh-keeping packaging material wa...

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Abstract

A fresh-keeping packaging material with a composite coating of PVA-liquid paraffin by adopting combined modification of functional nanosized TiO2-SiO2 and a preparation method thereof. The packaging material is produced through the reaction and recombination of the following components in an aqueous solution: 40-70g/L of PVA, 4-10g/L of liquid paraffin, 0.15-0.4g/L of nanosized TiO2, 0.2-0.5g/L of nanosized SiO2, 20%-50% (w/w[liquid paraffin]) of surfactant and 4-6g/L of glutaraldehyde. The preparation method comprises adding the nanosized TiO2 and SiO2 to the PVA solution to conduct ultrasonic mixing and thermostatic reaction; and then adding liquid paraffin-surfactant and glutaraldehyde to conduct cross-linking reaction, obtaining the composite-coating material. The PVA-based nano-modified composite-coating packaging material of the invention has a remarkably-reduced film-forming moisture permeability and a significantly improved bacteriostatic and fresh-keeping function.

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 nano-TiO 2 -SiO 2 Combination-modified PVA-liquid paraffin composite film-coated fresh-keeping packaging material and a preparation method thereof. Background technique [0002] Coating film packaging preservation method is a new hotspot in the research and development of food storage and preservation in recent years, and its packaging preservation effect mainly depends on the selection of basic film materials, compounding methods and preparation methods. Polyvinyl alcohol (PVA) is widely used in food packaging because of its easy film formation and degradation, good hygiene and safety, but because of its hydrophilic property, it has high moisture permeability after film formation, which affects its use on food packaging application ...

Claims

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Application Information

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IPC IPC(8): C09D129/04C09D7/12C08J3/24C08K5/07C08K3/22C08K3/36B65D65/38
CPCY02W90/10
Inventor 章建浩马龙俊王佳媚姚毅
Owner CHANGSHU YIHAO FOOD PACKAGING MATERIAL TECH
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