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Preparation method of thermoplastic starch material based on non-grain woody vegetable oil

A thermoplastic starch and woody plant technology, applied in the field of biodegradable materials, can solve the problems of easily polluted packaging items, reduce the adverse effects of small molecule plasticizers, plasticizer migration, etc., and achieve low plasticizer migration, Fully degradable, performance controllable effect

Inactive Publication Date: 2015-09-02
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the common plasticizers are small-molecule plasticizers, which have serious plasticizer migration problems and are easy to contaminate the packaged items. Therefore, the inventors designed and synthesized a series of macromolecular oil-based starch plasticizers, which can be partially or Completely replace some small molecule plasticizers, and greatly reduce the adverse effects of small molecule plasticizers on packaging products

Method used

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  • Preparation method of thermoplastic starch material based on non-grain woody vegetable oil
  • Preparation method of thermoplastic starch material based on non-grain woody vegetable oil

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 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.

Embodiment 2

[0026] 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.

Embodiment 3

[0028] 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.

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Abstract

The preparation method of the thermoplastic starch material based on non-grain woody vegetable oil, the preparation steps are: stirring and heating the fatty acid and its derivatives and controlling the temperature to 140-160 °C, and then setting the carboxyl molar ratio of the fatty acid and its derivatives to be 1.1-1. Add small molecule polyamine dropwise at a ratio of 1.4:1, then add catalyst accounting for 0.25%~2.5% of the total reaction system mass, raise the temperature to 180~220°C, react for 1~4h, and remove unreacted small molecule polyamine by vacuum distillation That is to prepare the aliphatic amide plasticizer; mix the prepared aliphatic amide plasticizer with glycerol and starch according to the mass ratio of (10~50):(10~30):70, collect the materials and seal them at room temperature Store for 12-36 hours, and finally process the product at 100-160°C by kneading method.

Description

technical field [0001] 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. Background technique [0002] 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. Since Griffin first ob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08K5/20C08K5/053
Inventor 许玉芝李守海王春鹏储富祥夏建陵金立维
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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