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CN-121975227-A - Polyolefin master batch with antibacterial and antioxidant functions and application thereof

CN121975227ACN 121975227 ACN121975227 ACN 121975227ACN-121975227-A

Abstract

The invention provides a polyolefin master batch with antibacterial and antioxidant functions and application thereof, and belongs to the technical field of plastics. The polyolefin master batch comprises 92-99% of polyolefin, 1-5% of titanium dioxide embedded tea polyphenol nano-microspheres and 0-3% of modified nano-zinc oxide by mass fraction. Through the structural design of titanium dioxide embedding tea polyphenol nanometer microballoon, the structure of inside tea polyphenol is protected, and in the use, tea polyphenol can slowly release, reaches continuous antioxidation effect, and the nanometer zinc oxide of adding can form heterojunction structure with titanium dioxide embedding tea polyphenol nanometer microballoon, strengthens ultraviolet resistance when having antibiotic effect, mixes the back with polyolefin, forms the multi-functional polyolefin master batch that has antioxidation, antibiotic, anti ultraviolet.

Inventors

  • ZHU XICHENG
  • YUE XUEBIN
  • ZHANG JIAN

Assignees

  • 南通金丝楠膜材料有限公司

Dates

Publication Date
20260505
Application Date
20260204

Claims (10)

  1. 1. The polyolefin master batch with the antibacterial and antioxidant functions comprises the following components in percentage by mass: 92-99% of polyolefin, 1-5% of titanium dioxide embedded tea polyphenol nano-microspheres and 0-3% of modified nano-zinc oxide.
  2. 2. The polyolefin master batch according to claim 1, wherein in the titanium dioxide embedded tea polyphenol nano-microspheres, the mass ratio of titanium dioxide to tea polyphenol is 1 (1-3).
  3. 3. The polyolefin master batch according to claim 1, wherein the titanium dioxide-embedded tea polyphenol nanomicrospheres are obtained by: under acidic conditions, tetrabutyl titanate is hydrolyzed to obtain titanium hydroxide; Adding tea polyphenol, uniformly stirring, and performing spray drying to obtain the titanium dioxide embedded tea polyphenol nano microsphere.
  4. 4. The polyolefin masterbatch according to claim 1, wherein the polyolefin is polypropylene.
  5. 5. The polyolefin master batch according to claim 4, wherein the polypropylene has a melt index of 3-4 g/10min (230 ℃ C./2.16 kg), a molecular weight distribution coefficient of 5-6, and a flexural modulus of >680Pa.
  6. 6. The polyolefin master batch according to claim 1, wherein the average particle size of the titanium dioxide embedded tea polyphenol nano-microspheres is 100-300 nm.
  7. 7. The polyolefin master batch according to claim 1, wherein the modified nano zinc oxide is obtained by modifying nano zinc oxide with a silane coupling agent or stearic acid, and/or, The mass ratio of the silane coupling agent or stearic acid to the nano zinc oxide is (0.01-0.05): 1.
  8. 8. Use of the polyolefin master batch with antibacterial and antioxidant functions according to any one of claims 1 to 7 for preparing a film.
  9. 9. The use according to claim 8, comprising: stirring and mixing polyolefin, titanium dioxide embedded tea polyphenol nano microspheres and optionally modified nano zinc oxide to obtain a mixture; and (3) sequentially carrying out extrusion granulation and tape casting on the mixture to prepare the film.
  10. 10. The use according to claim 9, wherein the extrusion granulation temperature is 160-200 ℃ and the film thickness is 20-40 μm.

Description

Polyolefin master batch with antibacterial and antioxidant functions and application thereof Technical Field The invention relates to the technical field of plastics, in particular to a polyolefin master batch with antibacterial and antioxidant functions and application thereof. Background In the packaging fields of foods, medicines and the like, the quality of the film is increasingly required. In particular, products in packages need to have a long shelf life, such as oxidation rancidity, microbial contamination or photo aging, which may occur when the package contains grease. In order to solve the problems, the related technology is to coat an antioxidation coating, an antibacterial coating and the like on the surface of a substrate or to stack the functional layers in a composite mode, but the process is more in a stacking mode, the energy consumption is higher, the compatibility between the functional layers is poor, microcracks are easy to form after drying, oxygen or water vapor is caused to penetrate locally, the deterioration of products in the package is accelerated, and the quality and quality of the products are affected. Disclosure of Invention In view of the above, the present invention provides a polyolefin masterbatch with antibacterial and antioxidant functions and application thereof, in order to at least partially solve the above-mentioned technical problems. According to an embodiment of one aspect of the invention, a polyolefin master batch with antibacterial and antioxidant functions is provided, and comprises, by mass, 92-99% of polyolefin, 1-5% of titanium dioxide embedded tea polyphenol nano-microspheres and 0-3% of modified nano-zinc oxide. In some embodiments, in the titanium dioxide embedded tea polyphenol nano-microsphere, the mass ratio of the titanium dioxide to the tea polyphenol is 1 (1-3). In some embodiments, the titanium dioxide embedded tea polyphenol nano-microsphere is obtained by hydrolyzing tetrabutyl titanate under acidic conditions to obtain titanium hydroxide, adding tea polyphenol, uniformly stirring, and performing spray drying to obtain the titanium dioxide embedded tea polyphenol nano-microsphere. In some embodiments, the polyolefin is polypropylene. In some embodiments, the polypropylene has a melt index of 3 to 4g/10min (230 ℃ C./2.16 kg), a molecular weight distribution coefficient of 5 to 6, and a flexural modulus of >680Pa. In some embodiments, the average particle size of the titanium dioxide embedded tea polyphenol nano-microspheres is 100-300 nm. In some embodiments, the modified nano zinc oxide is modified using a silane coupling agent or stearic acid. In some embodiments, the mass ratio of the silane coupling agent or stearic acid to the nano zinc oxide is (0.01-0.05): 1. According to an embodiment of another aspect of the present invention, there is provided an application of the polyolefin master batch having antibacterial and antioxidant functions as described above in preparing a film. In some embodiments, the application comprises stirring and mixing polyolefin, titanium dioxide embedded tea polyphenol nano-microspheres and optionally modified nano-zinc oxide to obtain a mixture, and sequentially extruding, granulating and casting the mixture to prepare the film. In some embodiments, the extrusion granulation temperature is 160-200 ℃ and the film thickness is 20-40 μm. Drawings The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings. Fig. 1 shows a scanning electron microscope image of the titanium dioxide-embedded tea polyphenol nano microsphere prepared in example 1 of the present invention. Detailed Description Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "comprising" as used herein indicates the presence of a feature, step, operation, but does not preclude the presence or addition of one or more other features. Where a formulation similar to at least one of "A, B or C, etc." is used, in general such a formulation should be interpreted in accordance with the ordinary understanding of one skille