Degradable thin film and preparing method
A degradable film, thermal oxidation degradation technology, applied in the field of degradable film and preparation, can solve the problems of affecting the growth of crops, wasting resources, polluting the air environment, etc., to achieve green sustainable development, high degree of degradation, high degradation rate Effect
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Embodiment 1
[0026] Embodiment 1: a kind of degradable film, it is prepared by the following method:
[0027] (1) dissolving nano-titanium dioxide in N,N-dimethylformamide, adding a thermo-oxidative degradation agent, mixing evenly, controlling the temperature at 105° C. until the solvent evaporates to dryness, and obtaining a thermo-oxidative degradation agent filled with nano-titanium dioxide;
[0028] (2) 100 parts of low-density polyethylene (purchased from Shanghai Petrochemical, with a weight-average molecular weight of 30,000 to 35,000 and a molecular weight distribution index of 2.2, the same below), 30 parts of calcium carbonate, 13.5 parts of pozzolan powder, and 1.5 parts of calcium chloride ( The mass ratio of calcium carbonate, volcanic ash powder and calcium chloride is 1: 0.45: 0.05), 25 parts of starch, 7.2 parts of mineral oil, 0.8 part of PEO-PPO-PEO triblock copolymer (mineral oil and PEO-PPO-PEO The mass of triblock copolymer is 1:0.11), 0.8 part of 2-(2'-hydroxyl-5'-me...
Embodiment 2
[0029] Embodiment 2: a kind of degradable film, it is prepared by the following method:
[0030] (1) dissolving nano-titanium dioxide in N,N-dimethylformamide, adding a thermo-oxidative degradation agent, mixing evenly, controlling the temperature at 110° C. until the solvent evaporates to dryness, and obtaining a thermo-oxidative degradation agent filled with nano-titanium dioxide;
[0031] (2) 100 parts of low-density polyethylene, 32.0 parts of calcium carbonate, 16.0 parts of pozzolan powder, 1.9 parts of calcium chloride (the mass ratio of calcium carbonate, pozzolan powder and calcium chloride is 1:0.50:0.06), 28 parts of starch , 8.8 parts of mineral oil, 1.2 parts of PEO-PPO-PEO triblock copolymer (the quality of mineral oil and PEO-PPO-PEO triblock copolymer is 1:0.14), 1.2 parts of 2-(2'-hydroxyl- 5'-methylphenyl) benzotriazole (abbreviated as UV-P), 1.0 parts of antioxidant 1010 and 9.0 parts of thermal oxidation degradation agent filled with nano titanium dioxide (...
Embodiment 3
[0032] Embodiment 3: a kind of degradable film, it is prepared by the following method:
[0033] (1) dissolving nano-titanium dioxide in N, N-dimethylformamide, adding a thermo-oxidative degradation agent, mixing evenly, controlling the temperature at 115° C. until the solvent evaporates to dryness, and obtaining a thermo-oxidative degradation agent filled with nano-titanium dioxide;
[0034] (2) 100 parts of low-density polyethylene, 33.7 parts of calcium carbonate, 18.6 parts of pozzolan powder, 2.7 parts of calcium chloride (the mass ratio of calcium carbonate, pozzolan powder and calcium chloride is 1:0.55:0.08), 30 parts of starch , 10.4 parts of mineral oil, 1.6 parts of PEO-PPO-PEO triblock copolymer (the quality of mineral oil and PEO-PPO-PEO triblock copolymer is 1:0.15), 1.5 parts of 2-(2'-hydroxyl- 5'-methylphenyl) benzotriazole (abbreviated as UV-P), 1.5 parts of antioxidant 1010 and 12 parts of thermo-oxidative degradation agent filled with nano-titanium dioxide (...
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