A kind of preparation method of thermoplastic fully degradable corn starch matrix
A corn starch, fully degradable technology, applied in the field of preparation of mechanical force and citric acid double-modified thermoplastic fully degradable corn starch matrix, can solve the problems of no strong interaction, incomplete degradation, high price, etc., to achieve long-term benefits Preservation, long-term preservation, and enhanced interaction effect
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Embodiment 1
[0015] The preparation method of thermoplastic fully degraded cornstarch matrix comprises the following steps:
[0016] Superfinely pulverize the common cornstarch so that the diameter of the cornstarch granules is 58-64 microns;
[0017] Add 500 kg of ultra-finely pulverized cornstarch and 125 kg of distilled water into a closed reactor and mix them so that the water content of the cornstarch reaches 20%; , stir at high speed for 3 minutes to mix thoroughly, and place in a closed reactor for 24 hours; heat and stir at a temperature of 120°C for 60 minutes for esterification reaction to obtain a viscous esterified product, after the reaction is completed, cool to room temperature to obtain a viscous esterified product; The esterified product is filtered and rinsed twice with distilled water to remove unreacted citric acid, and the product washed with distilled water is dried at 50°C to obtain a dry product, which is pulverized to obtain a light yellow powdery thermoplastic ful...
Embodiment 2
[0019] Add 1,000 kg of ultra-finely pulverized cornstarch and 250 kg of distilled water into a closed reactor and mix them so that the water content of the cornstarch reaches 20%; , and stir on high speed for 5 minutes to mix thoroughly.
[0020] Other steps are the same as in Example 1.
Embodiment 3
[0022] Add 600 kg of ultra-finely pulverized cornstarch and 150 kg of distilled water into a closed reactor and mix them so that the water content of the cornstarch reaches 20%; , beat on high speed for 4 minutes to mix well.
[0023] Other steps are the same as in Example 1.
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