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A kind of 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, uneven mixing of PET composite materials, and poor barrier performance of PET protective film.

Active Publication Date: 2021-06-29
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

Method used

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  • A kind of modified zno/pet protective film with high barrier property and preparation method thereof
  • A kind of modified zno/pet protective film with high barrier property and preparation method thereof
  • A kind of 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 the PET modified masterbatch includes the following specific steps:

[0027] a) Preparation of modified nano ZnO: 10.0 g of zinc stearate is dissolved in 50 ml of toluene to form a homogeneous solution, slowly add 15 ml of 4 mol / L sulfuric acid solution to the solution to form upper and lower layered stearic acid / toluene mixed fluids. And zinc sulfate solution, extract the resulting solution to zinc sulphate mixture and zinc sulfate solution; dissolve 7 g of lignin sulfonate in 50 ml of deionized water to form a surfactant solution; extract the resulting sulfate solution to stir In the case, it slowly added to the surfactant solution, and 100 ml of anhydrous ethanol was mixed, and then 20 ml of a NaOH solution was slowly added dropwise, stirred for 30 min, and the mixed solution was placed in a water bath for 5 h. The resulting product was centrifuged, washed, and dried from 50 ° C; dried nano-ZnO suspended in a stearic acid / toluene mixture o...

Embodiment 1

[0031] A raw material with high barrier modified nano ZnO / PET protective film includes:

[0032] PET resin: 100 parts;

[0033] PET modified masterbatch: 30 copies.

[0034] The PET resin is a polyethylene terephthalate (China Resources Polyester (Changzhou) Co., Ltd., 8863), and the monomer of the synthesis of the monomer is 166.13, the density is 1.55g / cm. 3 Ethylene glycol molecular weight is 62.068, the density is 1.12 g / cm 3 . The PET resin is characterized by 0.800 ~ 0.840 dl / g, the melting point is greater than or equal to 240 ° C, density 1.38 g / cm 3 Shaw's hardness 105 to 110A.

[0035] Method for preparing a modified nano-ZnO / PET protective film by high barrier property: After mixing PET resin and PET modified masterbatch according to the raw material components, drying at 150 ° C at a temperature of 500 r / min. 4h, injection molded by a temperature of 255 ° C injection. The mixing conditions of the PET modified masterbatch and PET resin are: the mixing temp...

Embodiment 2

[0037] A raw material with high barrier modified nano ZnO / PET protective film includes:

[0038] PET resin: 100 parts;

[0039] PET modified masterbatch: 30 copies.

[0040] The PET resin is a polyethylene terephthalate having a molecular weight of the monomer used in the synthesis of 166.13, and the density is 1.55 g / cm. 3 Ethylene glycol molecular weight is 62.068, the density is 1.12 g / cm 3 . The PET resin is characterized by 0.800 ~ 0.840 dl / g, the melting point is greater than or equal to 240 ° C, density 1.38 g / cm 3 Shaw's hardness 105 to 110A.

[0041] Method for preparing a modified nano-ZnO / PET protective film in accordance with a raw material component, after mixing PET resin and PET modified masterbatch at a temperature of 500 r / min, 6 h at 120 ° C, The injection molded by the temperature of 245 ° C injection. The mixing conditions of the PET modified masterbatch and PET resin are: the mixed temperature is 35 ° C, and the mixing time is 10 min.

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Abstract

The invention provides a high-barrier modified ZnO / PET protective film and a preparation method thereof, belonging to the technical field of polymer composite material synthesis. The preparation method comprises: using zinc stearate as a zinc source and a modifying agent to prepare modified nano-ZnO, then mixing the modified nano-ZnO with ethylene glycol to obtain a ZnO / ethylene glycol complex, and then mixing with terephthalic In-situ polymerization of formic acid to obtain PET modified masterbatch, and finally PET modified masterbatch and PET resin for injection molding. The modified nano-ZnO of a high barrier protective film prepared by the method of the present invention is not easy to agglomerate due to the formation of a complex with ethylene glycol, has a huge surface area and hydrophobic ability, has an excellent ability to block water vapor, and avoids external water vapor. The steam enters the inner side of the protective film, and at the same time, it can absorb the water vapor inside the protective film, making it a more excellent substitute in the fields of biomedical packaging and food preservation.

Description

Technical field [0001] In the field of synthesis techniques of polymer composites, the present invention relates to a high barrier modified ZnO / PET protective film and a preparation method thereof. [0002] technical background [0003] Polymer materials have been widely used in various fields due to their good properties, in which protective films prepared as raw materials are more visible in the life. The protective film is functionally placed on the entity item to be protected to achieve the purpose of protecting the physical item. The protective film can be divided into digital product protective film, automotive protective film, household protective film and food preservation protective film, etc. Among them, the home protective film is mainly used in the home environment, and protects the appliances or other items required by the home. The protective film used to protect the home items, generally have anti-fouling and scratching properties, wherein the anti-fouling perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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