Modified ZnO/PET protective film with high barrier property and preparation method thereof

A high-barrier, protective film technology, applied in the field of polymer composite material synthesis, can solve the problems of decreased mechanical properties, poor barrier performance of PET protective film, uneven mixing of PET composite materials, etc., to achieve uniform distribution, reduce production costs, and combine tight effect

Active Publication Date: 2020-04-17
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to develop a modified ZnO / PET protective film with high barrier property for the poor barrier performance of the existing PET protective film, and the addition of ZnO will lead to the decline of the uneven mechanical properties of the PET composite material. Membrane and its preparation method

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  • Modified ZnO/PET protective film with high barrier property and preparation method thereof
  • Modified ZnO/PET protective film with high barrier property and preparation method thereof
  • Modified ZnO/PET protective film with high barrier property and preparation method thereof

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preparation example Construction

[0026] The preparation method of described PET modified masterbatch comprises the following concrete steps:

[0027] a) Preparation of modified nano-ZnO: Dissolve 10.0g zinc stearate in 50ml toluene to form a homogeneous solution, slowly add 15ml 4mol / L sulfuric acid solution dropwise to the solution to generate a layered stearic acid / toluene mixture and zinc sulfate solution, the gained solution is extracted and separated to obtain stearic acid / toluene mixed solution and zinc sulfate solution; 7g sodium lignosulfonate is dissolved in 50ml deionized water to form a surfactant solution; the zinc sulfate solution obtained by extraction is stirred Slowly add it dropwise to the surfactant solution, mix well, add 100ml of absolute ethanol, then slowly dropwise add 20ml 2.5M NaOH solution, stir for 30min and mix well, put the mixed solution in a water bath at 80°C and stir for 5h, The obtained product was centrifuged, washed, and dried at 50°C to obtain nano-ZnO; the dried nano-ZnO ...

Embodiment 1

[0031] A kind of raw material of modified nano ZnO / PET protective film with high barrier property comprises by weight parts:

[0032] PET resin: 100 parts;

[0033] PET modified masterbatch: 30 parts.

[0034] The PET resin is polyethylene terephthalate (China Resources Polyester (Changzhou) Co., Ltd., 8863), the molecular weight of the monomer terephthalic acid used in its synthesis is 166.13, and the density is 1.55g / cm 3 ; The molecular weight of ethylene glycol is 62.068, and the density is 1.12 g / cm 3 . The intrinsic viscosity of the PET resin is 0.800~0.840 dl / g, the melting point is greater than or equal to 240°C, and the density is 1.38g / cm 3 , Shore hardness 105~110A.

[0035] A preparation method of modified nano-ZnO / PET protective film with high barrier properties: after mixing PET resin and PET modified masterbatch at a rotation speed of 500r / min according to the raw material components, dry at 150°C 4h, injection molded by an injection machine at a temperatur...

Embodiment 2

[0037] A kind of raw material of modified nano ZnO / PET protective film with high barrier property comprises by weight parts:

[0038] PET resin: 100 parts;

[0039] PET modified masterbatch: 30 parts.

[0040] The PET resin is polyethylene terephthalate, the molecular weight of monomer terephthalic acid used in its synthesis is 166.13, and the density is 1.55g / cm 3 ; The molecular weight of ethylene glycol is 62.068, and the density is 1.12 g / cm 3 . The intrinsic viscosity of the PET resin is 0.800~0.840 dl / g, the melting point is greater than or equal to 240°C, and the density is 1.38 g / cm 3 , Shore hardness 105~110A.

[0041] A preparation method of modified nano-ZnO / PET protective film with high barrier properties: after mixing PET resin and PET modified masterbatch at a speed of 500r / min according to the raw material components, dry at 120°C for 6h, It is injection molded by injection machine with a temperature of 245°C. The mixing conditions of the PET modified mast...

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Abstract

The invention provides a high-barrier-property modified ZnO / PET protective film and a preparation method thereof, belonging to the technical field of synthesis of polymer composite materials. The preparation method comprises the following steps: preparing modified nanometer ZnO by using zinc stearate as a zinc source and a modifier, mixing the modified nanometer ZnO with ethylene glycol to obtaina ZnO / ethylene glycol complex, carrying out in-situ polymerization on the ZnO / ethylene glycol complex and terephthalic acid to obtain PET modified master batch, and finally carrying out injection molding on the PET modified master batch and PET resin. The modified nanometer ZnO of the protective film with high barrier property prepared by the method disclosed by the invention is not easy to agglomerate since the nanometer ZnO forms the complex with ethylene glycol, so the protective film has huge surface area and hydrophobic capacity, has excellent water vapor blocking capacity, prevents external water vapor from entering the inner side of the protective film, can absorb water vapor on the inner side of the protective film, and becomes a substitute with more excellent performance in the fields of biomedical packaging, food preservation and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material synthesis, and in particular relates to a modified ZnO / PET protective film with high barrier properties and a preparation method thereof. [0002] technical background [0003] Polymer materials have been widely used in various fields due to their good performance, among which the protective film prepared from polymer materials can be seen in all aspects of life. The protective film, in terms of its function, is to place a film on the physical object to be protected to achieve the purpose of protecting the physical object. Protective film can be divided into digital product protective film, car protective film, household protective film and food preservation protective film according to the protection purpose. Among them, the household protective film is mainly used in the home environment to protect electrical appliances or other items required for home use. The protective fil...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K9/04C08K3/22C08J5/18C08J3/22
CPCC08J3/226C08J5/18C08J2367/02C08J2467/02C08K9/04C08K2003/2296C08K2201/011
Inventor 郑玉婴吴夏晴
Owner FUZHOU UNIV
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