A kind of superabsorbent airgel packaging material prepared by using reed waste residue and its preparation method

A technology of high water absorption and packaging materials, which is applied in the field of food packaging materials, can solve the problems of insufficient water absorption and degradability, and achieve the effects of reducing extraction costs, enhancing water absorption, and reducing production

Active Publication Date: 2022-06-07
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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  • A kind of superabsorbent airgel packaging material prepared by using reed waste residue and its preparation method

Examples

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Effect test

Embodiment 1

[0029] A method for preparing highly absorbent aerogel packaging material using reed waste residue, comprising the following steps:

[0030] (1) After crushing the reed waste residue, soaking in sodium hydroxide solution with a liquid-solid ratio of 5mL / g for 8h, boiling for 5h, filtering, collecting and cleaning the solid phase products;

[0031] (2) The solid phase product obtained in step (1) is placed in a mixture of lactic acid and betaine with a molar ratio of 0.5:1, stirred evenly at 60 °C, let stand for 5h and filtered, and the solid product is collected;

[0032] (3) After grinding the product obtained in step (2) under the condition of 1000 rpm for 30 min, heat it at 60 °C for 2h;

[0033] (4) At 100 °C, the starch-acrylic graft copolymer and trisodium phosphate were stirred and mixed for 5h in the ratio of 1:1 by weight, cooled to 60 °C, added to the product obtained in step (3), and continued to stir for 6h; The weight ratio of the resulting product to phosphate in ste...

Embodiment 2

[0036] A method for preparing highly absorbent aerogel packaging material using reed waste residue, comprising the following steps:

[0037] (1) After crushing the reed waste residue, soaking in sodium hydroxide solution with a liquid-solid ratio of 8mL / g for 8h, boiling for 5h, filtering, collecting and cleaning the solid phase products;

[0038] (2) The solid phase product obtained in step (1) was placed in a mixture of lactic acid and betaine with a molar ratio of 1:1, stirred evenly at 70 °C, let stand for 6h and filtered, and the solid product was collected;

[0039] (3) After the product obtained in step (2) is ground under the condition of 500 rpm for 20 min, it is heated at 65 °C for 5 h;

[0040] (4) At 120 °C, the starch-acrylic graft copolymer and sodium phosphate were stirred and mixed for 5h in the ratio of 1:3 by weight, cooled down to 65 °C, added to the product obtained in step (3), and continued to stir for 2~6h; The weight ratio of the resulting product to phosphat...

Embodiment 3

[0043] A method for preparing highly absorbent aerogel packaging material using reed waste residue, comprising the following steps:

[0044] (1) After crushing the reed waste residue, soak the solid phase products in a liquid-solid ratio of 10mL / g in a liquid-solid ratio of 10mL / g in sodium hydroxide solution with a concentration of 3mol / L, boil for 5h, filter, collect and clean the solid phase products;

[0045] (2) The solid phase product obtained in step (1) was placed in a mixture of lactic acid and betaine with a molar ratio of 1:1, stirred evenly at 75 °C, let stand for 10h and filtered to collect the solid product;

[0046] (3) After grinding the product obtained in step (2) under the condition of 600 rpm for 30 min, heat it at 75 °C for 3 h;

[0047] (4) At 150 °C, the starch-acrylic graft copolymer and sodium dihydrogen phosphate were stirred and mixed for 3h in the proportion of 1:4 by weight, cooled down to 75 °C, added to the product obtained in step (3), and continued...

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Abstract

The invention discloses a highly water-absorbing airgel packaging material prepared by using reed waste residue and a preparation method thereof. The method comprises the following steps: (1) crushing reed waste residue, soaking in sodium hydroxide solution for 4-8 hours, filtering, collecting and cleaning the solid phase product; (2) placing the solid phase product in lactic acid and betaine (3) Grind the product obtained in step (2), and then heat it at 60-75°C for 2-5 hours; (4) Stir the starch-acrylic acid graft copolymer and phosphate Mix, lower the temperature to 60-75°C, add the product obtained in step (3), and continue stirring for 2-6 hours; (5) freeze-dry. The airgel packaging material prepared by the invention has excellent degradation performance and water absorption performance, is non-toxic and harmless, and is environmentally friendly and safe.

Description

Technical field [0001] The present invention belongs to the technical field of food packaging materials, specifically relates to a kind of reed waste residue preparation of superabsorbent aerogel packaging materials and preparation methods thereof. Background [0002] Plastic is a very malleable polymer material, it is used in the field of packaging, compared with traditional packaging materials (paper, metal, glass, etc.), plastic packaging materials have their own unique properties. All kinds of packaging materials made of plastics, 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 because plastic packaging has its own unique excellent characteristics, such as excellent physical and mechanical properties, good chemical stability...

Claims

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Application Information

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Patent Type & Authority Patents(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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