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High-water-absorption aerogel packaging material prepared from reed waste residues and preparation method thereof

A high water absorption, packaging material technology, applied in the field of food packaging materials, can solve problems such as insufficient water absorption and degradability, and achieve the effects of reducing extraction costs, reducing output, and improving water absorption

Active Publication Date: 2020-08-28
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a highly water-absorbent airgel packaging material prepared by using reed waste residue and its preparation method, which can effectively solve the problems of insufficient water absorption and degradability existing in the existing packaging materials

Method used

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  • High-water-absorption aerogel packaging material prepared from reed waste residues and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A method for preparing a highly water-absorbent airgel packaging material by using reed waste residue, comprising the following steps:

[0030] (1) After pulverizing the reed waste residue, soak it in a sodium hydroxide solution with a concentration of 6 mol / L at a liquid-solid ratio of 5 mL / g for 8 hours, boil for 5 hours, filter, collect and wash the solid phase product;

[0031] (2) Place the solid-phase product obtained in step (1) in a mixture of lactic acid and betaine with a molar ratio of 0.5:1, stir evenly at 60° C., filter after standing for 5 hours, and collect the solid product;

[0032] (3) Grinding the product obtained in step (2) for 30 minutes at 1000 rpm, and heating at 60° C. for 2 hours;

[0033] (4) Stir and mix the starch-acrylic acid graft copolymer and trisodium phosphate at a weight ratio of 1:1 at 100°C for 5 hours, then cool down to 60°C, add the product obtained in step (3), and continue stirring for 6 hours. Can; The weight ratio of describe...

Embodiment 2

[0036] A method for preparing a highly water-absorbent airgel packaging material by using reed waste residue, comprising the following steps:

[0037] (1) After pulverizing the reed waste residue, soak it in a sodium hydroxide solution with a concentration of 3 mol / L at a liquid-solid ratio of 8 mL / g, soak for 8 hours, boil for 5 hours, filter, collect and wash the solid phase product;

[0038] (2) Place the solid-phase product obtained in step (1) in a mixture of lactic acid and betaine with a molar ratio of 1:1, stir evenly at 70° C., filter after standing for 6 hours, and collect the solid product;

[0039] (3) After grinding the product obtained in step (2) for 20 minutes at 500 rpm, heat at 65° C. for 5 hours;

[0040] (4) Stir and mix the starch-acrylic acid graft copolymer and sodium phosphate at a weight ratio of 1:3 at 120°C for 5 hours, then cool down to 65°C, add the product obtained in step (3), and continue stirring for 2 to 6 hours Get final product; The weight ...

Embodiment 3

[0043] A method for preparing a highly water-absorbent airgel packaging material by using reed waste residue, comprising the following steps:

[0044] (1) After pulverizing the reed waste residue, soak it in a sodium hydroxide solution with a concentration of 3 mol / L at a liquid-solid ratio of 10 mL / g, soak for 8 hours, boil for 5 hours, filter, collect and wash the solid phase product;

[0045] (2) Place the solid phase product obtained in step (1) in a mixture of lactic acid and betaine with a molar ratio of 1:1, stir evenly at 75° C., filter after standing for 10 h, and collect the solid product;

[0046] (3) Grinding the product obtained in step (2) for 30 minutes at 600 rpm, and heating at 75° C. for 3 hours;

[0047] (4) Stir and mix the starch-acrylic acid graft copolymer and sodium dihydrogen phosphate at a weight ratio of 1:4 at 150°C for 3 hours, then cool down to 75°C, add the product obtained in step (3), and continue stirring for 2 hours Get final product; The weig...

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Abstract

The invention discloses a high-water-absorption aerogel packaging material prepared from reed waste residues and a preparation method thereof. The method comprises the following steps: (1) crushing reed waste residues, soaking in a sodium hydroxide solution for 4-8 hours, filtering, and collecting and cleaning a solid-phase product; (2) putting the solid-phase product into a mixture of lactic acidand glycine betaine, uniformly stirring, filtering, and collecting a solid-phase product; (3) grinding the product obtained in the step (2), and heating at 60-75 DEG C for 2-5 hours; (4) stirring andmixing a starch-acrylic acid graft copolymer and phosphate, cooling to 60-75 DEG C, adding the product obtained in the step (3), and continuing stirring for 2-6 hours; and (5) carrying out freeze drying. The aerogel packaging material prepared by the invention has excellent degradation performance and water absorption performance, and is non-toxic, harmless, environment-friendly and safe.

Description

technical field [0001] The invention belongs to the technical field of food packaging materials, and in particular relates to a highly water-absorbent airgel packaging material prepared by using reed waste residue and a preparation method thereof. Background technique [0002] Plastic is a polymer material with good plasticity. It is used in the packaging field. Compared with traditional packaging materials (paper, metal, glass, etc.), plastic packaging materials have unique properties. Various packaging materials made of plastic, such as plastic film, plastic bags, plastic barrels and boxes, plastic bottles and cans, and composite packaging materials, are widely used in the field of food packaging, and the market demand is increasing year by year. The reason why plastic packaging materials can be widely used in food packaging is that plastic packaging has its unique excellent characteristics, such as excellent physical and mechanical properties, good chemical stability, lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L51/02C08L1/02C08K3/32D21C5/00
CPCC08J9/28D21C5/00C08J2205/026C08J2351/02C08J2401/02C08J2451/02C08J2301/02C08J2201/048C08K2003/324Y02W90/10
Inventor 白鸽陈照国王琛仲红艳
Owner QILU UNIV OF TECH
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