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A kind of double-layer biomass composite membrane material

A technology of biomass and composite membranes, which is applied in the field of preparation of biomass membrane materials, can solve problems such as insufficient functionality and poor mechanical properties, and achieve the effects of optimizing mechanical properties, increasing barrier properties, and facilitating barriers

Active Publication Date: 2021-04-06
上海万封新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of poor mechanical properties and insufficient functionality of a single material biomass membrane, and provide a preparation method for a double-layer biomass membrane material with good mechanical properties, antibacterial properties and gas barrier properties

Method used

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  • A kind of double-layer biomass composite membrane material

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preparation example Construction

[0050] The preparation technology of described double-layer biomass composite membrane material is:

[0051] (1) Preparation of the bottom chitosan-based blown film layer: put all the raw materials into a high-speed blender and stir for 40min at a speed of 400rpm, and then blow them into a biaxially stretched extrusion blow molding machine to form a film; The conditions for extrusion blow molding are: extrusion section temperature 170°C, longitudinal stretching temperature 80°C, stretching ratio 2.4, transverse stretching temperature 55°C, stretching ratio 1.8, heat treatment temperature 70°C;

[0052] (2) Preparation of surface cellulose-based casting film layer: using deionized water as a solvent, cellulose acetate, carboxymethyl chitosan, four-armed polyethylene glycol propionaldehyde, and sodium alginate were sequentially dropped into deionized water , high-speed stirring until uniform dispersion, the mass concentration of the dispersion is 6.5%, the dispersion is cast on ...

specific Embodiment 2

[0063]A double-layer biomass composite film material, comprising a bottom chitosan-based blown film layer and a surface cellulose-based cast film layer;

[0064] Wherein, chitosan-based film layer comprises material and corresponding mass fraction as follows:

[0065] Chitosan 42 parts

[0066] Carboxymethyl chitosan 16 parts

[0067] Nano plant fiber silk 0.8 parts

[0068] 18 parts gelatin

[0069] Poly(beta hydroxybutyrate-co-beta hydroxyvalerate) 18 parts

[0070] Nano-hydroxyapatite 1.5 parts

[0071] Wherein, the cellulose-based cast film layer includes substances and corresponding parts by mass as follows:

[0072] 30 parts cellulose acetate

[0073] Carboxymethyl chitosan 12 parts

[0074] Four-arm polyethylene glycol propionaldehyde 2.2 parts

[0075] Sodium alginate 6.5 parts

[0076] It is also characterized in that: the bottom chitosan-based blown film layer is formed into a film by melting and blending two-way stretch blow molding, and the surface layer o...

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Abstract

The invention relates to a double-layer biomass composite film material, which comprises a bottom layer of chitosan-based blown film and a surface layer of cellulose-based cast film. It is molded into a film, and the surface cellulose-based cast film layer is cast on the surface of the bottom film with water as a solvent. The double-layer biomass composite film material has good mechanical properties, antibacterial properties and gas barrier properties, can achieve full degradation, and can be applied to high-grade packaging films or biomedical fields.

Description

technical field [0001] The invention relates to a preparation method of a biomass membrane material, in particular to a preparation method of a double-layer biomass membrane material with good mechanical properties, antibacterial properties and gas barrier properties. Background technique [0002] The proportion of film materials in packaging materials is very large, and most of the film materials are still made of plastic materials. On the one hand, although plastic materials have excellent mechanical properties and wide applicability, they are derived from petroleum products and cannot be degraded. It will cause environmental pollution and waste of resources. On the other hand, it is very difficult for plastic materials to achieve certain functions due to their single groups. It is becoming a challenge to find alternative materials with excellent performance, functionality and renewable materials. At present, the top priority of research in the field of materials. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/08C08L97/02C08L89/00C08L67/04C08L1/12C08L5/04C08L71/02C08K3/32C08J5/18C08J7/048
CPCC08J5/18C08J2301/12C08J2305/08C08J2405/04C08J2405/08C08J2467/04C08J2471/02C08J2489/00C08J2497/02C08K2003/325C08K2201/011
Inventor 陈一
Owner 上海万封新材料技术有限公司