Preparation method of thermoplastic starch material based on non-grain woody plant oil and fat

Abstract

The invention discloses a preparation method of a thermoplastic starch material based on non-grain woody plant oil and fat. The preparation method comprises the steps of stirring fatty acid and derivatives thereof, heating and controlling the temperature to 140-160 DEG C; then, dropwise adding micromolecular polyamine according to the proportion that the mole ratio of the carboxy group of the micromolecular polyamine to the carboxy groups of the fatty acid and the derivatives thereof is (1.1-1.4):1; then, adding a catalyst, wherein the catalyst accounts for 0.25-2.5% of the total mass of a reaction system; raising the temperature to 180-220 DEG C, reacting for 1-4h, and removing unreacted micromolecular polyamine through reduced pressure distillation to obtain an aliphatic amide plasticizer; uniformly mixing the prepared aliphatic amide plasticizer, glycerol and starch according to the mass proportion of (10-50):(10-30):70, collecting the material and storing the material in a sealed way at room temperature for 12-36h; finally, processing the material under the condition of 100-160 DEG C by using a kneading method to obtain the thermoplastic starch material.

Description

[0001] technical field

[0002] The invention belongs to the field of biodegradable materials, and in particular relates to a preparation method of a thermoplastic starch material based on non-grain woody vegetable oil.

[0003] Background technique

[0004] The use of natural bio-based materials to develop fully biodegradable materials can not only alleviate the environmental pollution caused by conventional plastic products, but also enable the plastic industry to get rid of dependence on petroleum resources, which is a real way to reduce plastic waste, protect ecological balance and open up new plastics. important source of raw materials. In recent years, with the advancement of raw material production and product processing technology, degradable plastics, especially biodegradable plastics, have received renewed attention and become the highlight of sustainable and circular economic development. At the same time, they have once again become a hot spot in the world. Sin...

Examples

Embodiment 1

[0030] Stir the fatty acid and its derivatives, heat and control the temperature to 140°C, then add ethanolamine dropwise at a ratio of 1.1:1 to the carboxyl group of ricinoleic acid, and then add 0.25% of the catalyst 1-hydroxybenzotri azole, heated to 180°C, reacted for 4 hours, and distilled off unreacted ethanolamine under reduced pressure to obtain aliphatic amide plasticizer; the obtained aliphatic amide was mixed with glycerin and acorn starch according to the mass ratio of 10:30:70 The mixture was uniformly mixed, collected and sealed at room temperature for 36 hours, and finally processed at 100°C by twin-screw extrusion to obtain a thermoplastic starch material based on vegetable oil.

[0031]

Embodiment 2

[0033] Stir the fatty acid and its derivatives, heat and control the temperature to 140~160°C, then add diethylenetriamine dropwise at a molar ratio of 1.4:1 to the carboxyl group of maleic castor oil, and then add 2.5% of the catalyst phosphoric acid in the total reaction system mass Triphenol ester, heated up to 220°C, reacted for 1h, and distilled off the unreacted diethylenetriamine under reduced pressure to obtain aliphatic amide plasticizer; prepared aliphatic amide with glycerol and acorn starch according to 25 :20:70 mass ratio, mixed evenly, collected and sealed at room temperature for 36 hours, and finally processed by twin-screw extrusion method at 160°C to obtain a thermoplastic starch material based on vegetable oil.

[0034]

Embodiment 3

[0036] Stir the fatty acid and its derivatives, heat and control the temperature to 140~160°C, then add diethylenetriamine dropwise at a ratio of 1.2:1 to the carboxyl group of the dimerized fatty acid, and then add 0.5% of the catalyst imidazole in the total reaction system mass , heated up to 190°C, reacted for 3h, and removed unreacted diethylenetriamine under reduced pressure to obtain an aliphatic amide plasticizer; the prepared aliphatic amide, glycerol, acorn starch according to 50:10: The mass ratio of 70% was mixed evenly, and the material was collected and sealed at room temperature for 24 hours. Finally, a thermoplastic starch material based on vegetable oil was obtained by twin-screw extrusion at 120°C.

[0037]

[0001] technical field

[0002] The invention belongs to the field of biodegradable materials, and in particular relates to a preparation method of a thermoplastic starch material based on non-grain woody vegetable oil.

[0003] Background technique

[0004] The use of natural bio-based materials to develop fully biodegradable materials can not only alleviate the environmental pollution caused by conventional plastic products, but also enable the plastic industry to get rid of dependence on petroleum resources, which is a real way to reduce plastic waste, protect ecological balance and open up new plastics. important source of raw materials. In recent years, with the advancement of raw material production and product processing technology, degradable plastics, especially biodegradable plastics, have received renewed attention and become the highlight of sustainable and circular economic development. At the same time, they have once again become a hot spot in the world. Sin...

Examples

Embodiment 1

[0030] Stir the fatty acid and its derivatives, heat and control the temperature to 140°C, then add ethanolamine dropwise at a ratio of 1.1:1 to the carboxyl group of ricinoleic acid, and then add 0.25% of the catalyst 1-hydroxybenzotri azole, heated to 180°C, reacted for 4 hours, and distilled off unreacted ethanolamine under reduced pressure to obtain aliphatic amide plasticizer; the obtained aliphatic amide was mixed with glycerin and acorn starch according to the mass ratio of 10:30:70 The mixture was uniformly mixed, collected and sealed at room temperature for 36 hours, and finally processed at 100°C by twin-screw extrusion to obtain a thermoplastic starch material based on vegetable oil.

[0031]

Embodiment 2

[0033] Stir the fatty acid and its derivatives, heat and control the temperature to 140~160°C, then add diethylenetriamine dropwise at a molar ratio of 1.4:1 to the carboxyl group of maleic castor oil, and then add 2.5% of the catalyst phosphoric acid in the total reaction system mass Triphenol ester, heated up to 220°C, reacted for 1h, and distilled off the unreacted diethylenetriamine under reduced pressure to obtain aliphatic amide plasticizer; prepared aliphatic amide with glycerol and acorn starch according to 25 :20:70 mass ratio, mixed evenly, collected and sealed at room temperature for 36 hours, and finally processed by twin-screw extrusion method at 160°C to obtain a thermoplastic starch material based on vegetable oil.

[0034]

Embodiment 3

[0036] Stir the fatty acid and its derivatives, heat and control the temperature to 140~160°C, then add diethylenetriamine dropwise at a ratio of 1.2:1 to the carboxyl group of the dimerized fatty acid, and then add 0.5% of the catalyst imidazole in the total reaction system mass , heated up to 190°C, reacted for 3h, and removed unreacted diethylenetriamine under reduced pressure to obtain an aliphatic amide plasticizer; the prepared aliphatic amide, glycerol, acorn starch according to 50:10: The mass ratio of 70% was mixed evenly, and the material was collected and sealed at room temperature for 24 hours. Finally, a thermoplastic starch material based on vegetable oil was obtained by twin-screw extrusion at 120°C.

[0037]

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