A kind of biodegradable polymer porous composite material and preparation method thereof
A porous composite material and biodegradable technology, which is applied in the field of biodegradable polymer porous composite materials and its preparation, can solve the problems of difficult air bubble fixing and molding, mechanical properties and mechanical strength performance need to be strengthened, and achieve low cost and water absorption. Good, easy-to-operate results
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Embodiment 1
[0032] Using natural polymer materials and synthetic polymers as raw materials, the biodegradable polymer porous composite material is prepared by introducing microorganisms to increase the biodegradability of the material. The preparation steps are:
[0033] In the first step, add 0.5 parts of polyvinyl alcohol in parts by mass to 100 parts of deionized water, and stir at 80° C. for 12 hours to obtain matrix A; 1.2 parts by mass of carboxymethyl cellulose, Add 0.1 part of cyclodextrin to 10 parts of deionized water, and stir at 30°C for 0.1 hour to obtain matrix B.
[0034] In the second step, the prepared foaming matrix is cooled to room temperature, and the mass parts are 10 parts of matrix A, 10 parts of matrix B, 0.5 parts of fresh yeast, 0.2 parts of glucose, 0.1 parts of amino acids, and 0.05 parts of starch , 0.05 parts of citric acid-disodium hydrogen phosphate buffer solution, the temperature is 25 ° C, the stirring speed is 300r / min, stirring for 4 hours, poured i...
Embodiment 2
[0040] Using natural polymer materials and synthetic polymers as raw materials, the biodegradable polymer porous composite material is prepared by introducing microorganisms to increase the biodegradability of the material. The preparation steps are:
[0041] In the first step, add 10 parts of polyvinyl alcohol to 1000 parts of deionized water in parts by mass, and stir at 120°C for 1 hour to obtain matrix A; 2 parts by mass of gelatin and 4 parts of alginic acid Sodium was added to 1000 parts of deionized water, stirred at 100° C. for 8 hours, and matrix B was obtained.
[0042] In the second step, the prepared foaming matrix is cooled to room temperature, and the mass parts are 12.5 parts of matrix A, 16 parts of matrix B, 10 parts of dry yeast, 1 part of wheat starch, 1 part of beef extract, 0.1 part of citric acid-dipotassium hydrogen phosphate buffer solution at a temperature of 40°C and a stirring speed of 400r / min, placed in a constant temperature incubator, stirred f...
Embodiment 3
[0047] Using natural polymer materials and synthetic polymers as raw materials, the biodegradable polymer porous composite material is prepared by introducing microorganisms to increase the biodegradability of the material. The preparation steps are:
[0048] In the first step, add 0.2 parts of polyvinyl alcohol into 10 parts of deionized water in parts by mass, and stir at 100°C for 2 hours to obtain matrix A; add 0.5 parts of sodium alginate, 0.1 parts of Add water-soluble chitin and 0.6 parts of hydroxyethyl cellulose to 20 parts of deionized water, and stir at 100° C. for 6 hours to obtain matrix B.
[0049] In the second step, the prepared foaming matrix is cooled to room temperature, and the mass parts are 12 parts, 16 parts of matrix B, 2.5 parts of instant yeast, 2 parts of potato starch, 0.1 part of bean sprouts extract, 3 parts of Malic acid-potassium citrate buffer solution was stirred at a temperature of 36°C and a stirring speed of 500r / min for 7 hours, poured i...
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