Preparation method of cellulose-based foaming buffer packaging materials in BmimCl/LiOH system

A cellulose-based, cushioning packaging technology, applied in the field of cellulose materials, can solve the problems of high production cost, complicated manufacturing process, environmental pollution, etc., and achieve the effect of excellent performance and simplified process

Active Publication Date: 2018-02-23
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the manufacturing process of the existing cellulose-based foamed materials is complicated, and a large amount of chemical additives are added in the production process, which causes the cellulose-based foamed materials to emit some harmful gases during production and use, causing environmental pollution; in addition, in the traditional production process A lot of waste is produced, the production cost is high, and the treatment process is complicated

Method used

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  • Preparation method of cellulose-based foaming buffer packaging materials in BmimCl/LiOH system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: This example provides a method for preparing a porous cellulose-based foam cushioning packaging material, and the specific steps are as follows:

[0027] (1) Vacuum drying: the microcrystalline cellulose was vacuum-dried at 45°C for 36 h;

[0028] (2) Mixing treatment: Mix 1-butyl-3-methylimidazole chloride and LiOH solution to prepare a solvent, wherein the mass fraction of 1-butyl-3-methylimidazole chloride in the solvent is 97.5 %, then add vacuum-dried microcrystalline cellulose in the solvent to obtain a mixed solution, wherein the massfraction of microcrystalline cellulose in the mixed solution is 5%;

[0029] (3) Protection treatment: Before mixing and dissolving for heat treatment, it is necessary to pass nitrogen protection to the mixed solution to prevent the oxidation of cellulose during heat treatment;

[0030] (4) Heat treatment: The mixed solution obtained after the mixed treatment in step (2) and nitrogen protection in step (3) was placed in a...

Embodiment 2

[0036] Example 2: This example provides a method for preparing a porous cellulose-based foaming cushioning packaging material. The specific steps are as follows:

[0037] (1) Vacuum drying: the microcrystalline cellulose was vacuum-dried at 45°C for 36 h;

[0038] (2) Mixing treatment: Mix 1-butyl-3-methylimidazole chloride and LiOH solution to prepare a solvent, wherein the mass fraction of 1-butyl-3-methylimidazole chloride in the solvent is 97.5 %, then add vacuum-dried microcrystalline cellulose in the solvent to obtain a mixed solution, wherein the massfraction of microcrystalline cellulose in the mixed solution is 10%;

[0039] (3) Protection treatment: Before mixing and dissolving for heat treatment, it is necessary to pass nitrogen protection to the mixed solution to prevent the oxidation of cellulose during heat treatment.

[0040] (4) Heat treatment: The mixed solution obtained after the mixed treatment in step (2) and nitrogen protection in step (3) was placed in a...

Embodiment 3

[0046] Example 3: This example provides a method for preparing a porous cellulose-based foaming cushioning packaging material, and the specific steps are as follows:

[0047] (1) Vacuum drying: the microcrystalline cellulose was vacuum-dried at 45°C for 36 h;

[0048] (2) Mixing treatment: Mix 1-butyl-3-methylimidazole chloride and LiOH solution to prepare a solvent, wherein the mass fraction of 1-butyl-3-methylimidazole chloride in the solvent is 99% %, then add vacuum-dried microcrystalline cellulose in the solvent to obtain a mixed solution, wherein the massfraction of microcrystalline cellulose in the mixed solution is 7%;

[0049] (3) Protection treatment: Before mixing and dissolving for heat treatment, it is necessary to pass nitrogen protection to the mixed solution to prevent the oxidation of cellulose during heat treatment.

[0050] (4) Heat treatment: The mixed solution obtained after the mixed treatment in step (2) and nitrogen protection in step (3) was placed in...

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Abstract

The invention belongs to the technical field of cellulose materials, and relates to a preparation method of cellulose-based foaming buffer packaging materials in a BmimCl/LiOH system. The preparationmethod includes the steps: performing vacuum drying on microcrystalline cellulose; taking mixed solution of chlorination-1-butyl-3-methylimidazole and lithium hydroxide solution as a solvent, adding the dried microcrystalline cellulose, and uniformly mixing mixture; leading in shielding gas, and performing anti-oxidation decomposition treatment; performing stirring and heating to obtain microcrystalline cellulose solution; dripping the solution into water by a falling-ball method to obtain cellulose hydrogel; washing the cellulose hydrogel by a gradient washing method; performing vacuum freezedrying to obtain porous cellulose-based foaming buffer packaging materials; performing filtration, purification and rotary evaporation on the residual solvent, and recycling ionic liquid. The prepared cellulose packaging materials can be biodegraded and are environmentally friendly, a preparation process of the cellulose-based foaming buffer packaging materials is simplified, chemical additivesare omitted, and the packaging materials has the advantages that the materials are environmentally friendly and free from pollution.

Description

technical field [0001] The invention belongs to the technical field of cellulose materials, and relates to a preparation method of a cellulose-based foaming buffer packaging material in a BmimCl / LiOH system. Background technique [0002] With the rise and development of the packaging industry, packaging materials with cushioning and shockproof functions have successively experienced foamed plastics, pulp molding materials and plant fiber foamed packaging materials. Foam plastic has the advantages of light weight, easy processing, good protection performance, wide applicability and low cost, but it is difficult to recycle after it is discarded, incineration pollutes the environment, and its environmental protection performance is poor. As the concept of low-carbon economy and green packaging is gradually recognized by people, the development technology of environmentally friendly packaging materials has been paid more and more attention. [0003] Cellulose is a cheap renewab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J3/075C08J3/09C08L1/04
CPCC08J3/075C08J3/096C08J9/28C08J2201/0484C08J2301/04
Inventor 庞志强王斌收董翠华傅晓童王佩玉
Owner QILU UNIV OF TECH
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