Biodegradable packaging material and preparation method thereof
A technology of biodegradable and packaging materials, applied in the field of biodegradable packaging materials and its preparation, can solve problems such as pollution, endangering human survival and health, and endangering the environment, achieving high decomposition rate, increasing hydrophobicity, and improving environmental protection Effect
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[0026] A biodegradable packaging material, comprising the following preparation method steps:
[0027] S1, prepare 20-40 parts of starch, 15-25 parts of cellulose, 15-25 parts of chitin, 10-20 parts of protein, 2-6 parts of polyvinyl alcohol, 1-3 parts of polymerizing agent, and 2-4 parts of plasticizer 3-5 parts of biodegradable additives;
[0028] S2, carry out superfine pulverization of starch, blend polyvinyl alcohol with starch, add a small amount of solubilizer, improve the uniformity of starch dispersion; deacetylate chitin under alkaline adjustment to generate chitosan; chitosan Acetic acid aqueous solution, polyvinyl alcohol aqueous solution, and plasticizer are mixed according to a certain ratio to make a mixture;
[0029] S3, the cellulose is chemically modified to make methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose and carboxymethyl cellulose, from methyl cellulose, hydroxypropyl methyl cellulose , cellulose ether film made from water o...
Embodiment 1
[0033] Embodiment 1: Prepare 20 parts of starch, 15 parts of cellulose, 15 parts of chitin, 10 parts of protein, 2 parts of polyvinyl alcohol, 1 part of polymerization agent, 2 parts of plasticizer, 3 parts of biodegradation additive; Micro-grinding, blending polyvinyl alcohol and starch, adding a small amount of solubilizer to improve the uniformity of starch dispersion; deacetylating chitin under alkaline adjustment to generate chitosan; mixing chitosan with acetic acid aqueous solution, polyethylene Alcohol aqueous solution and plasticizer are mixed according to a certain ratio to make a mixture; the cellulose is chemically modified to make methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose and carboxymethyl cellulose, Cellulose ether films prepared from aqueous or hydroalcoholic solutions of methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose and carboxymethyl cellulose; polymerizing the resulting mixture with cellulose ether fil...
Embodiment 2
[0034] Embodiment 2: Prepare 30 parts of starch, 20 parts of cellulose, 20 parts of chitin, 15 parts of protein, 4 parts of polyvinyl alcohol, 2 parts of polymerization agent, 3 parts of plasticizer, 4 parts of biodegradation additive; Micro-grinding, blending polyvinyl alcohol and starch, adding a small amount of solubilizer to improve the uniformity of starch dispersion; deacetylating chitin under alkaline adjustment to generate chitosan; mixing chitosan with acetic acid aqueous solution, polyethylene Alcohol aqueous solution and plasticizer are mixed according to a certain ratio to make a mixture; the cellulose is chemically modified to make methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose and carboxymethyl cellulose, Cellulose ether films prepared from aqueous or hydroalcoholic solutions of methyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose and carboxymethyl cellulose; polymerizing the resulting mixture with cellulose ether fi...
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