A preparation method of high barrier polylactic acid film containing three-dimensional barrier network
A polylactic acid and high-barrier technology, which is applied in the field of preparation of high-barrier polylactic acid films, can solve the problems of limited barrier performance of a single polymer film, inability to meet the requirements of different commodities, shortened shelf life of electronic devices, etc., and achieve low production costs. , good interface properties, excellent barrier properties
Active Publication Date: 2022-01-14
SICHUAN UNIV
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Problems solved by technology
However, the barrier properties of a single polymer film are limited and cannot meet the requirements of different commodities, which will cause problems such as food deterioration, drug failure, and shortened shelf life of electronic devices (Cui Y B, et al.RSC Advances, 2015, 5: 63669- 63690.)
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Embodiment 1-24
[0029] Embodiment 1-24 (see table 1)
[0030] A preparation method of a high-barrier polylactic acid film containing a three-dimensional barrier network of the present invention, the raw materials and reagents used are as follows: raw materials: polylactic acid, polyethylene oxide, graphene oxide; reagents: emulsifier, water, dichloride Methane; The preparation method adopts the following steps:
[0031] S1. Preparation of polylactic acid microspheres: Dissolve polylactic acid at room temperature. The weight average molecular weight of polylactic acid is 200,000-300,000. Polylactic acid solvent can be dichloromethane or chloroform, and the concentration of polylactic acid solution is 0.01-1g / ml, to obtain a clear solution, while adding a water-soluble emulsifier to deionized water, the water-soluble emulsifier can be polyvinyl alcohol, Tween 80, gelatin, polyvinylpyrrolidone, and the concentration of the water-soluble emulsifier is 0.01-1g / ml , mix the above two solutions, a...
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Abstract
The invention discloses a method for preparing a high-barrier polylactic acid film containing a three-dimensional barrier network. The required raw materials are as follows: polylactic acid, polyethylene oxide, and graphene oxide; through the following steps: S1, polylactic acid microspheres Preparation; S2, preparation of graphene oxide / polyethylene oxide dispersion; S3, solution coating; S4, hot pressing. In the present invention, polylactic acid microspheres are used as a template, and the coating of graphene oxide sheets with excellent barrier properties on the surface of polylactic acid microspheres is realized through the solution coating of polyethylene oxide solution system, and the barrier microunits are constructed, namely Graphene oxide / polyethylene oxide@polylactic acid composite microspheres are formed by hot pressing to construct a three-dimensional graphene oxide network in the polylactic acid matrix, which has excellent oxygen barrier properties at an extremely low content of graphene oxide. The polymer composite film has simple preparation process, low production cost and has the potential of industrial production.
Description
technical field [0001] The invention relates to the field of polymer packaging films, in particular to a preparation method of a high-barrier polylactic acid film containing a three-dimensional barrier network. Background technique [0002] At present, barrier packaging materials are widely used in food packaging, drug packaging, electronic device packaging and other fields (Yoo B M, et al. Journal of Applied Polymer Science, 2014, 131:939628.). Among them, polymer film has become the mainstream material for barrier packaging due to its advantages of light weight, low price, and easy processing. However, the barrier properties of a single polymer film are limited and cannot meet the requirements of different commodities, which will cause problems such as food deterioration, drug failure, and shortened shelf life of electronic devices (Cui Y B, et al.RSC Advances, 2015, 5: 63669- 63690.). According to reports, the loss of food and medicine in developing countries is as high...
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IPC IPC(8): C08L67/04C08L71/02C08K3/04C08J5/18
CPCC08J5/18C08J2367/04C08J2471/02C08K3/042
Inventor 黄华东徐平平李忠明钟淦基
Owner SICHUAN UNIV