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Preparation method of cellulose-based foaming and buffering packaging material in AmimCl/LiOH system

A cellulose-based, buffer packaging technology, applied in the field of cellulose materials, can solve the problems of complex production process, harmful gas emission from foaming agent, etc., and achieve the effect of simplified process, excellent product performance and good strength

Active Publication Date: 2018-03-27
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem of complex manufacturing process of traditional cellulose-based foaming materials, overcomes the drawbacks of existing foaming agents emitting harmful gases, and provides a method for dissolving cellulose in the AmimCl / LiOH system and regenerating fibers with water as an anti-solvent A method for directly preparing a porous plant fiber buffer material by using freeze-drying to produce a plain hydrogel, wherein AmimCl is an ionic liquid, and its Chinese name is: Chloride-1-allyl-3-methylimidazole

Method used

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  • Preparation method of cellulose-based foaming and buffering packaging material in AmimCl/LiOH system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1, the preparation method of the porous cellulose cushioning packaging material provided in this example is achieved through the following steps:

[0028] (1) Vacuum drying: the microcrystalline cellulose was vacuum-dried at 45°C for 24 h;

[0029] (2) Mixing treatment: Mix the chloride-1-allyl-3-methylimidazole and LiOH solution to prepare a solvent (the mass fraction of the solute in the LiOH solution is 10%), and the chloride-1-allyl- The massfraction of 3-methylimidazole in the solvent is 97%; then add the microcrystalline cellulose after vacuum drying in the solvent to obtain a mixed solution, wherein the massfraction of microcrystalline cellulose in the mixed solution is 4%;

[0030] (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.

[0031] (4) Heat treatment: Mix the step (3) and pass it under nitrogen p...

Embodiment 2

[0037] Example 2: The preparation method of the porous cellulose cushioning packaging material provided in this example is achieved through the following steps:

[0038] (1) Vacuum drying: the microcrystalline cellulose was vacuum-dried at 45°C for 24 h;

[0039](2) Mixing treatment: Mix the chloride-1-allyl-3-methylimidazole and LiOH solution to prepare a solvent (the mass fraction of the solute in the LiOH solution is 10%), and the chloride-1-allyl- The massfraction of 3-methylimidazole in the solvent is 99%; Add vacuum-dried microcrystalline cellulose to the solvent to obtain a mixed solution, wherein the massfraction of microcrystalline cellulose in the mixed solution is 10%;

[0040] (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.

[0041] (4) Heat treatment: The mixed solution obtained after the step (3) was mixed, pla...

Embodiment 3

[0047] Example 3: The preparation method of the porous cellulose cushioning packaging material provided in this example is achieved through the following steps:

[0048] (1) Vacuum drying: the microcrystalline cellulose was vacuum-dried at 45°C for 24 h;

[0049] (2) Mixing treatment: Mix the chloride-1-allyl-3-methylimidazole and LiOH solution to prepare a solvent (the mass fraction of the solute in the LiOH solution is 10%), and the chloride-1-allyl- The massfraction of 3-methylimidazole in the solvent is 99%; Add vacuum-dried microcrystalline cellulose to the solvent to obtain a mixed solution, wherein the massfraction of microcrystalline cellulose in the mixed solution is 7%;

[0050] (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.

[0051] (4) Heat treatment: The mixed solution obtained after the step (3) was mixed, pla...

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Abstract

The invention belongs to the technical field of cellulose materials and relates to a preparation method of a cellulose-based foaming and buffering packaging material in an AmimCl / LiOH system. The preparation method comprises the following steps: performing vacuum drying on microcrystalline cellulose; by adopting the mixed solution of a lithium hydroxide solution and a chloro-1-allyl-3-methylimidazole as a solvent, drying the microcrystalline cellulose and mixing uniformly; introducing a protective gas; stirring and heating; preparing cellulose hydrogel by a falling-sphere method; completely washing residual solvent in the cellulose hydrogel by a gradient washing method; performing vacuum freezing and drying; filtering the residual solvent to remove impurities, performing rotary evaporationand recycling the ionic liquid. According to the preparation method provided by the invention, the prepared cellulose-based buffering material can be regenerated and degraded; existing technology issimplified; the whole preparation process does not need special equipment, and no chemical additive is added in the production process; the product has good performance; the ionic liquid can be recycled and repeatedly used in the production process; the preparation method has the advantages of environmental friendliness, high efficiency and zero 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 an AmimCl / LiOH system. Background technique [0002] With the progress and development of human society, the packaging and transportation industry has flourished in recent years. In packaging and transportation, some valuable and fragile things need to be cushioned and shockproof to prevent damage during transportation. The packaging materials with cushioning and shockproof functions have successively experienced foam plastics, plastic bag inflatable packaging bags, pulp molding materials and plant fiber foaming packaging materials. Styrofoam plastics and plastic bag inflatable packaging bags have the advantages of light weight, easy processing, good protection performance, wide applicability and low cost, but they are difficult to recycle after being discarded, white pollution, non-biodegrad...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08J3/075C08J3/02C08L1/04
CPCC08J3/02C08J3/075C08J9/28C08J2201/0484C08J2301/04Y02P20/54
Inventor 董翠华王斌收庞志强傅晓童王佩玉
Owner QILU UNIV OF TECH
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