A kind of biodegradable film, its preparation method and the mulch film containing the same
A degradable film and biological technology, applied in the fields of botanical equipment and methods, plant protection, plant protection cover, etc., can solve the problems of inconvenient soil water replenishment process, slow natural degradation rate, and unclean removal of residual film, so as to reduce competitiveness. , The effect of low production cost and labor cost reduction
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Embodiment 1
[0033] The biodegradable film is prepared from the following raw materials: rice husks and polyvinyl alcohol, the thickness of the film is 0.3 mm, and the amount of rice husks per square meter of the film is 150 g.
[0034] The preparation method of the above-mentioned biodegradable film, the method comprises the following steps:
[0035] (1) get rice husk, dry, pulverize, sieve, obtain rice husk powder;
[0036] (2) heating water to 50°C, adding polyvinyl alcohol and stirring, continuing to heat to 80°C and stirring until dissolved, to obtain a polyvinyl alcohol solution, the concentration of which is 8%;
[0037] (3) adding the rice husk powder obtained in the step (1) to the polyvinyl alcohol solution obtained in the step (2), the mass ratio of the rice husk powder and the polyvinyl alcohol solution is 1:25, stirring, Mix evenly to obtain a mixed solution;
[0038] (4) The mixed solution obtained in step (3) is evenly spread on a wire mesh, the aperture of which is 80 mes...
Embodiment 2
[0041] The biodegradable film is prepared from the following raw materials: rice husks and polyvinyl alcohol, the thickness of the film is 1 mm, and the amount of rice husks per square meter of the film is 500 g.
[0042] The preparation method of the above-mentioned biodegradable film, the method comprises the following steps:
[0043] (1) get rice husk, dry, pulverize, sieve, obtain rice husk powder;
[0044] (2) heating water to 40°C, adding polyvinyl alcohol and stirring, continuing to heat to 90°C and stirring until dissolved, to obtain a polyvinyl alcohol solution, the concentration of which is 14%;
[0045] (3) adding the rice husk powder obtained in the step (1) into the polyvinyl alcohol solution obtained in the step (2), the mass ratio of the rice husk powder and the polyvinyl alcohol solution is 1:35, stirring, Mix evenly to obtain a mixed solution;
[0046] (4) Evenly spread the mixed solution obtained in step (3) on a wire mesh with a pore size of 150 meshes, an...
Embodiment 3
[0049] A biodegradable film, the film is prepared from the following raw materials: rice husks and modified polyvinyl alcohol, the modifier of the modified polyvinyl alcohol is epoxy resin, the thickness of the film is 0.7 mm, and the thickness of each square is 0.7 mm. The amount of rice husks in the film is 400g.
[0050] The preparation method of the above-mentioned biodegradable film, the method comprises the following steps:
[0051] (1) take rice husks, dry at 60° C. until the water content in the rice husks is 14.8%, pulverize, and sieve to obtain rice husk powder, and the particle size of the rice husk powder is 0.5 mm;
[0052] (2) Heat water to 45°C, add polyvinyl alcohol and stir, continue heating to 85°C and stir until dissolved, add epoxy resin with 2% by weight of polyvinyl alcohol when it is cooled to 65°C, and keep at 65°C , stirring at a rate of 40 r / min for 2 h to obtain an epoxy resin modified polyvinyl alcohol solution, the concentration of which is 12.5%;...
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