A kind of fertilizer type biodegradable plastic film and preparation method thereof
A biodegradable and biodegradable plastic technology is applied in the field of fertilizer-type biodegradable plastic film and its preparation, which can solve the problems that the function of temperature increase and moisture preservation does not meet the needs of crop growth, increase the processing cost, and be difficult to practical application, etc. Beneficial for recycling and crop growth
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Embodiment 1
[0031] A biodegradable mulch film, the raw material is composed of: 73.0 parts by weight of PBAT, 20.0 parts by weight of sodium alginate-coated urea (2000 mesh, urea content is 50%), 5.0 parts by weight of talc, 1.0 parts by weight of ultraviolet stabilizer UV3853, Oxidant B900 1.0 part by weight.
[0032] The preparation method of sodium alginate coated urea (2000 mesh) is as follows:
[0033] (1) with 2% sodium alginate solution as water phase, add urea, stir;
[0034] (2) Take the isooctane solution as the oil phase, add Span-80, stir evenly, and preheat in a 40°C water bath for 10 minutes;
[0035] (3) Add the sodium alginate solution containing urea dropwise to the oil phase, stir while adding dropwise, continue to stir at a high speed for 60min after the dropwise addition, add 8% CaCl dropwise 2 The solution was continuously stirred for 30 minutes, washed fully with absolute ethanol and distilled water, dried at room temperature and filtered to obtain sodium alginate ...
Embodiment 2
[0048] A biodegradable mulch film, the raw material is composed of: 70.0 parts by weight of PBAT, 13.0 parts by weight of PLA, 10.0 parts by weight of chitosan-coated monohydrogen phosphate microspheres (2500 mesh, ammonium monohydrogen phosphate content is 20%), mica 5.0 parts by weight of sheet, 0.5 part by weight of oleic acid, 0.5 part by weight of chain extender ADR-4400, 0.5 part by weight of ultraviolet stabilizer UV 326, and 0.5 part by weight of antioxidant B215.
[0049] The preparation method of chitosan-coated monohydrogen phosphate microspheres is as follows:
[0050] (1) Dissolve chitosan with 2% glacial acetic acid, add ammonium monohydrogen phosphate, and stir evenly;
[0051] (2) Take liquid paraffin as the oil phase, add Span-80, stir evenly, then in a 40°C constant temperature water bath, slowly add the standby mixture described in step (1) under the stirring condition of 1500r / min, and continue Stir for 1h;
[0052] (3) add a certain amount of glutaraldeh...
Embodiment 3
[0064] A biodegradable mulch film, the raw materials are composed of: 60.0 parts by weight of PBAT, 10.0 parts by weight of PPC, 10.0 parts by weight of polyvinyl alcohol-coated ammonium monohydrogen phosphate microspheres (5000 mesh, the content of ammonium monohydrogen phosphate is 50%), potassium sulfate ( 5000 mesh) 10.0 parts by weight, 5.0 parts by weight of modified talc, 1.0 parts by weight of UV stabilizer UV3853, 1.0 parts by weight of antioxidant B225, and 3.0 parts by weight of carrier-free black masterbatch 330BK.
[0065] The preparation method of polyvinyl alcohol-coated ammonium monohydrogen phosphate microspheres is as follows:
[0066] (1) configure a PVA solution with a mass fraction of 5% as the water phase, add ammonium monohydrogen phosphate, and stir evenly;
[0067] (2) take liquid paraffin as oil phase, add Span-80, stir evenly;
[0068] (3) Add a well-mixed water phase to the oil phase, add 2.0g STMP cross-linking agent, add 1mL NaOH as a catalyst, a...
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