A kind of starch-based degradable bioplastic and preparation method thereof
A bioplastic, starch-based technology, applied in the field of starch-based degradable bioplastics and its preparation, can solve the problems of insufficient starch hydrophobicity, pollution of plastic garbage bags, and decreased mechanical strength, etc., and achieves improved hydrophobic performance, low investment, and easy access. control effect
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Embodiment 1
[0017] The preparation method of described starch-based degradable bioplastics comprises the following steps:
[0018] Dry 100 kg of corn starch in a drying oven at 100 °C for 4 h, then weigh 40 kg of the dried starch and add it to a mixer, stirring at 2500 r / min. When the starch temperature is 80 °C, change The dibenzoyl peroxide solution of the modifier is injected into a high mixer through a syringe and mixed with the starch. The amount of the modifier dibenzoyl peroxide solution is 0.2 kg, and after stirring for 30 min, 0.08 kg of nano-silica particles are added. Continue to stir for 10min to obtain highly hydrophobic starchy material, then the saturated triglyceride of 5kg and natural vegetable oil mixture, the zinc stearate of 5kg are mixed, make masterbatch with twin-screw extruder, masterbatch and 50kg After the polypropylene is mixed, injection molding, edge pressing, blow molding, and air molding are made into starch-based biodegradable bioplastics.
Embodiment 2
[0020] The preparation method of described starch-based degradable bioplastics comprises the following steps:
[0021] Dry 100 kg of sorghum starch in a drying oven at 110 °C for 4 h, then weigh 50 kg of the dried starch and add it to a mixer, stirring at 2700 r / min. When the starch temperature is 90 °C, change the The peroxybenzoic acid solution of the modifier is injected into the high mixer through a syringe and mixed with the starch. The dosage of the modifier peroxybenzoic acid solution is 0.25 kg. After stirring for 30 min, add 0.1 kg of nano-silica particles and continue stirring for 10 min. Obtain highly hydrophobic starchy material, then the unsaturated triglyceride of 5kg and natural vegetable oil mixture, the manganese stearate of 5kg are mixed, make master batch with twin-screw extruder, master batch and 40kg polyphenylene After ethylene is mixed, injection molding, edge pressing, blow molding, and air molding are made into starch-based degradable bioplastics.
Embodiment 3
[0023] The preparation method of described starch-based degradable bioplastics comprises the following steps:
[0024] 100kg of potato starch was first dried in a drying oven at 120°C for 4 h, then 35kg of the dried starch was weighed and added to a mixer, and stirred at 3000 r / min. When the starch temperature was 100°C, change The neutralizing agent cumene hydrogen peroxide solution is injected into a high mixer through a syringe and mixed with the starch. The amount of the modifying agent cumene hydrogen peroxide solution is 0.175 kg. After stirring for 30 min, add 0.07 kg of nano-silica particles. Continue to stir for 10min to obtain highly hydrophobic starchy material, then the monoglyceride and triglyceride mixture of 2.5 unsaturated fatty acids, the oleate of zinc of 2.5kg are mixed, make masterbatch with twin-screw extruder, will After the masterbatch is mixed with 60kg of polyvinyl chloride, the starch-based biodegradable bioplastic is made by injection molding, edge p...
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