Pbat-based biodegradable composites with high water vapor barrier properties

Abstract

The invention provides a PBAT-based biodegradable composite material with high vapor barrier property. The composite material comprises the following components: PBAT, organic modification material, inorganic modification material, an initiator, a compatilizer and a catalyst. Compared with the prior art, the PBAT-based biodegradable composite material has the following beneficial effects: the compatibility and dispersity of the inorganic material in PBAT can be greatly improved by bridging PBAT with the inorganic material; the bridging action, generated due to combination of the compatilizer and the initiator, of the inorganic material is partially directionally distributed by layers in a blending system, the pass route of water molecules can be prolonged, and the motion time of the water molecules in the material can be prolonged, so that the water retention property of the material can be remarkably improved, the water vapor permeability of the composite material 10mum thin film material is reduced to 320g / m<2>.24h from 280g / m<2>.24h of the original-specification thin film, which is obviously superior to the similar materials.

Description

technical field [0001] The invention relates to a PBAT-based biodegradable composite material with high water vapor barrier properties, belonging to the technical field of polymer materials. Background technique [0002] After the use of traditional plastic packaging film products, it is not easy to recycle due to the variety of types, and most of them are incinerated after recycling, which increases greenhouse gases (such as CO 2 gas) and harmful substances (such as dioxins), so biodegradable materials and their packaging products have gradually become a hot spot in current research and development. [0003] PBAT is a copolymer of butylene adipate and butylene terephthalate. It has the characteristics of both PBA and PBT. It has good ductility and elongation at break, as well as good heat resistance. and impact performance. In addition, PBAT is also an excellent biodegradable material, so it is widely used in the production of film and sheet packaging products. However, ...

AI Technical Summary

Problems solved by technology

This method uses polycarbonate polymer as the base material, and the glass transition temperature of polycarbonate is only 35°C. It is easy to deform and unstable in summer at high room temperature, and the stability of the coating layer has not been verified. , affecting the service life of the barrier film

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