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Graphene oxide/aliphatic-aromatic copolyester and preparation method thereof

A graphene and aromatic technology, applied in the field of graphene oxide/aliphatic-aromatic copolyester and its preparation, can solve the problems of difficult degradation, environmental pollution, inability to be widely used in food and medicine fields, etc., and achieve high barrier properties. , the effect of reducing pollution

Active Publication Date: 2014-03-19
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, the barrier materials widely used in the fields of food and medicine are film products with multi-layer structure made of traditional plastics. Although they have good barrier properties, they can exist stably in nature for a long time and are difficult to degrade. It is difficult to recycle after it is discarded, causing serious pollution to the environment.
However, the biodegradable materials used in the packaging field do not have barrier properties, so they cannot be widely used in the fields of food and medicine.

Method used

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  • Graphene oxide/aliphatic-aromatic copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add 2.0 g of graphene oxide into water, and ultrasonically disperse for 20 minutes, add 33.0 g of BDO under strong stirring, raise the temperature of the solution to 155-180 ° C, completely distill out the water in it, and make the hydroxyl group of the aliphatic dihydric alcohol and The carboxyl group of graphene oxide reacts to obtain graphene oxide / aliphatic glycol solution;

[0045] Add 5.0g of 1,4-cyclohexanedimethanol, 25.0g of adipic acid, 35g of terephthalic acid, and 2.2g of naphthalene dicarboxylic acid into the reaction kettle. Under nitrogen protection, raise the temperature to 210°C, and add n-butyl titanate 30 mg ester, keep the temperature in the reactor at 210°C, and remove the water produced by the reaction by splitting, and judge the degree of reaction by weighing the water generated by the reaction. When the esterification rate reaches 95%, after the temperature reaches 230°C, add Triphenyl phosphite 0.02g, react for 30 minutes, then start to slowly h...

Embodiment 2

[0048] Add 2.5g of graphene oxide into water, and ultrasonically disperse for 20 minutes, add 50.0g of BDO under strong stirring, raise the temperature of the solution to 155-180°C, completely distill out the water in it, and make the hydroxyl group of the aliphatic dihydric alcohol and The carboxyl group of graphene oxide reacts to obtain graphene oxide / aliphatic glycol solution;

[0049] Add 35.0g of terephthalic acid, 34.4g of sebacic acid and 2.5g of naphthalene dicarboxylic acid into the reaction kettle, under the protection of nitrogen, raise the temperature to 210°C, add 30mg of n-butyl titanate, and maintain the temperature in the reaction kettle at 210°C At the same time, the water produced by the reaction is removed by split flow, and the degree of reaction is judged by weighing the water generated by the reaction. When the esterification rate reaches 95%, after the temperature is lowered to 230 ° C, add 0.02 g of triphenyl phosphite and react for 30 minutes. , and t...

Embodiment 3

[0052] Add 2800g of graphene oxide into water, and ultrasonically disperse for 20 minutes, add 33kg of BDO under strong stirring, raise the temperature of the solution to 155-180°C, completely distill out the water in it, and make the hydroxyl group of the aliphatic dihydric alcohol and the graphite oxide The carboxyl group of ene is reacted to obtain graphene oxide / aliphatic dihydric alcohol solution;

[0053] Add 33kg of 1,4-butanediol, 4kg of 1,4-cyclohexanedimethanol, 34kg of terephthalic acid, and 2.5kg of naphthalene dicarboxylic acid into the reaction kettle, raise the temperature to 210°C under the protection of nitrogen, and add titanic acid 30g of n-butyl ester, keep the temperature in the reactor at 210°C, remove the water produced by the reaction by splitting, and judge the degree of reaction by weighing the water generated by the reaction. When the esterification rate reaches 95%, add 25kg of adipic acid, Maintain the reaction temperature at 210°C until the esteri...

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Abstract

The invention discloses graphene oxide / aliphatic-aromatic copolyester. The graphene oxide / aliphatic-aromatic copolyester comprises the following raw materials by weight: 2 to 10% of graphene oxide, 40 to 65% of aliphatic dihydric alcohol, 32 to 57% of diacid or dimethyl ester thereof, 0.01 to 0.2% of a catalyst and 0.01 to 0.18% of a stabilizing agent. A preparation method for the graphene oxide / aliphatic-aromatic copolyester comprises the following steps: pretreatment of graphene oxide; transesterification; and condensation polymerization. The prepared graphene oxide / aliphatic-aromatic copolyester is biodegradable, has a high barrier property and can be extensively used in the fields of food and medicines; since the graphene oxide / aliphatic-aromatic copolyester is a biodegradable barrier material, used graphene oxide / aliphatic-aromatic copolyester can be subjected to composting after discarding, thereby reducing pollution to the environment.

Description

technical field [0001] The invention relates to a graphene oxide / aliphatic-aromatic copolyester and a preparation method thereof. Background technique [0002] Bio-based materials refer to a class of new materials that use renewable biomass, including crops, trees, other plants, and their residues and contents, as raw materials, and are manufactured through biological, chemical, and physical methods. Bio-based products mainly refer to lignocellulosic agricultural and forestry wastes such as straws other than grain, and using them as raw materials to produce environmentally friendly chemical products and green energy is the only way for human beings to achieve sustainable development. Bio-based products and green energy issues have become the forefront of the world's scientific and technological fields. [0003] It is predicted that my country's remaining recoverable oil reserves are 2.3 billion tons, which can only be exploited for 14 years. At present, most of my country'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/199C08G63/189C08G63/85C08K9/04C08K3/04C08L67/02
Inventor 苑仁旭徐依斌李建军焦建赵巍曾祥斌夏世勇钟宇科
Owner KINGFA SCI & TECH CO LTD
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