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A kind of cellulose paper/dynamic covalent polymer composite packaging material and its preparation method and application

A composite packaging material and cellulose paper technology, applied in the field of material chemistry, can solve the problems of less than 10% recovery rate, low water resistance, poor degradation performance, etc., achieve good thermal processing characteristics, simple production process, and excellent comprehensive performance Effect

Active Publication Date: 2021-07-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the non-degradability of traditional petroleum-based plastics and the high cost of plastic recycling, the current recycling rate of waste packaging plastics is less than 10%
However, the porous and hydrophilic nature of cellulose paper prevents it from having the high gas barrier and water resistance properties required for packaging materials
In addition, the strong hydrogen bonding force between cellulose molecular chains makes cellulose paper not have the thermal melting and plastic processing properties of traditional plastics.
Although the current methods and technologies of chemical vapor deposition, composite graphene, paper-plastic composite, and natural polymer coating have obtained cellulose paper composite materials with the possibility of replacing traditional plastics, these composite materials are still expensive to produce and degraded. Disadvantages such as poor performance, low water resistance and poor thermal processing performance

Method used

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  • A kind of cellulose paper/dynamic covalent polymer composite packaging material and its preparation method and application
  • A kind of cellulose paper/dynamic covalent polymer composite packaging material and its preparation method and application
  • A kind of cellulose paper/dynamic covalent polymer composite packaging material and its preparation method and application

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Effect test

Embodiment 1

[0040] This embodiment provides a method for preparing a printing paper-based packaging material (packaging material 1).

[0041] The preparation method of this packaging material 1 is as follows:

[0042] (1) Preparation of polyimine: according to figure 1 The mechanism of the Schiff base reaction shown, according to the molar ratio of dialdehyde (terephthalaldehyde), diamine (diethylenetriamine) and triamine (tris(2-aminoethyl)amine) is 1:0.3:0.47 , 3.46g terephthalaldehyde, 0.8g diethylenetriamine and 1.76g tris(2-aminoethyl)amine were dissolved in 170ml ethanol, and reacted at room temperature for 6h to obtain a polyimide solution, and further volatilized the organic solvent A polyimide film was obtained. Infrared spectrum ( image 3 ) shows that the synthesized polymer has a strong imine absorption peak, proving the successful synthesis of polyimine. Dynamic mechanical analysis test (DMA) shows that the glass transition temperature (Tg) of polyimide is 115°C ( Figur...

Embodiment 2

[0047] This embodiment provides a method for preparing a newspaper-based packaging packaging material (packaging material 2).

[0048] The preparation method of this packaging material 2 is as follows:

[0049] (1) Preparation of polyimine: according to figure 1 The mechanism of the Schiff base reaction shown, according to the molar ratio of dialdehyde (terephthalaldehyde), diamine (diethylenetriamine) and triamine (tris(2-aminoethyl)amine) is 1:0.3:0.47 3.46g of terephthalaldehyde, 0.8g of diethylenetriamine and 1.76g of tris(2-aminoethyl)amine were dissolved in 170ml of ethanol, and reacted at room temperature for 6h to obtain a polyimide solution. Further volatilize organic solvent to obtain polyimide film, infrared spectrum ( image 3 ) shows that the synthesized polymer has a strong imine absorption peak, proving the successful synthesis of polyimine. Dynamic mechanical analysis test (DMA) shows that the glass transition temperature (Tg) of polyimide is 115°C ( Figur...

Embodiment 3

[0054] This embodiment provides a method for preparing a paper towel base packaging packaging material (packaging material 3).

[0055] The preparation method of this packaging material 3 is as follows:

[0056] (1) Preparation of polyimine: according to figure 1 The mechanism of the Schiff base reaction shown, according to the molar ratio of dialdehyde (terephthalaldehyde), diamine (diethylenetriamine) and triamine (tris(2-aminoethyl)amine) is 1:0.3:0.47 3.46g of terephthalaldehyde, 0.8g of diethylenetriamine and 1.76g of tris(2-aminoethyl)amine were dissolved in 170ml of ethanol, and reacted at room temperature for 6h to obtain a polyimide solution. Further volatilize organic solvent to obtain polyimide film, infrared spectrum ( image 3 ) shows that the synthesized polymer has a strong imine absorption peak, proving the successful synthesis of polyimine. Dynamic mechanical analysis test (DMA) shows that the glass transition temperature (Tg) of polyimide is 115°C ( Figu...

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Abstract

The invention belongs to the field of material chemistry, and specifically discloses a cellulose paper / dynamic covalent polymer composite packaging material, a preparation method and application thereof. The preparation method of the cellulose paper / dynamic covalent polymer composite packaging material comprises the following steps: preparing a dynamic covalent polymer, compounding the dynamic covalent polymer and cellulose paper to obtain cellulose paper / dynamic covalent polymer compound material, and then heat-press the cellulose paper / dynamic covalent polymer composite material to obtain the cellulose paper / dynamic covalent polymer composite packaging material. The polymer matrix-polyimine used in the present invention can be rapidly synthesized at room temperature using inexpensive reactive monomers. At the same time, polyimide has good thermal processing properties, self-healing properties, chemical degradation properties and recycling properties. In addition, cellulose paper and polyimide can be compounded to obtain cellulose paper-based packaging materials only through simple dipping, spraying or coating, and auxiliary hot-pressing treatment.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a cellulose paper / dynamic covalent polymer composite packaging material and its preparation method and application. Background technique [0002] Plastic is an indispensable synthetic polymer material in modern life. It not only has the characteristics of low price, light weight, high transparency, good mechanical strength, etc., but also has the advantages of excellent gas barrier, water barrier and high chemical stability. Therefore, a large amount of plastic products are used as packaging materials for various industrial products. According to statistics, as of 2018, the global production of plastic packaging materials has reached 1.5 billion tons, which accounts for 40% of the world's total plastic production. In addition, it is estimated that the total output of packaging plastics in the world will exceed 2.5 billion tons in 2050. However, due to the non-degr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/49C08G12/06B32B29/00B32B29/06B32B33/00B32B37/06B32B37/10B65D65/40B65D65/38
CPCB32B29/005B32B29/06B32B33/00B32B37/06B32B37/10B32B2250/26B32B2255/12B32B2260/028B32B2260/046B32B2307/716B32B2307/7242B32B2307/7265B32B2309/02B32B2309/04B32B2309/12B65D65/38B65D65/40C08G12/06D21H17/49Y02W30/80
Inventor 王小慧苏治平张伟金英华
Owner SOUTH CHINA UNIV OF TECH