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Preparation method of polyethylene/graphene master batch

A polyethylene and graphene technology, applied in the field of preparation of polyethylene/graphene master batches, can solve problems such as large environmental hazards, unfavorable re-dispersion, etc., and achieve the effects of low cost, green and pollution-free preparation process, and simple process

Pending Publication Date: 2019-06-04
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method of first reducing graphene oxide to graphene and then mixing it with polymers, graphene will inevitably re-aggregate, which is not conducive to re-dispersion, and uses organic solvents, which is harmful to the environment.

Method used

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  • Preparation method of polyethylene/graphene master batch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) 1g of graphite oxide was added to 200g of water, stirred at 100rpm and 20°C for 0.5h, then ultrasonicated at 500W and 60°C for 30min to disperse and exfoliate to obtain a graphene oxide aqueous solution;

[0029] Add 50% aqueous polyethylene wax emulsion containing 1g of polyethylene into the graphene oxide aqueous solution, stir and mix evenly, then add 2g of 10% calcium chloride solution for demulsification, and obtain polyethylene / graphene oxide particle suspension ;

[0030] (2) Add 5g of vitamin C to the polyethylene / graphene oxide particle suspension prepared in step (1), reduce it for 10 hours at 80°C, and filter it under a vacuum with a vacuum degree of 0.01MPa and a temperature of 60°C. After drying in an oven for 24 hours, the polyethylene / graphene master batch with a graphene content of 50% was obtained.

Embodiment 2

[0032] (1) 1g of graphite oxide was added to 100g of water, stirred at 200rpm and 40°C for 2h, then ultrasonicated at 100W and 80°C for 60min to disperse and peel off to obtain a graphene oxide aqueous solution,

[0033] Add 45% aqueous polyethylene wax emulsion containing 1.5g polyethylene into the graphene oxide aqueous solution, stir and mix evenly, then add 5g 15% magnesium chloride solution for demulsification, and obtain polyethylene / graphene oxide particle suspension;

[0034] (2) Add 10 g of vitamin C to the polyethylene / graphene oxide particle suspension prepared in step (1), reduce it for 24 hours at 25° C. After drying in an oven for 24 hours, a polyethylene / graphene master batch with a graphene content of 40% was obtained.

Embodiment 3

[0036] (1) 1g of graphite oxide was added to 100g of water, stirred at 300rpm and 30°C for 1h, then ultrasonicated at 300W and 40°C for 10min to disperse and peel off to obtain a graphene oxide aqueous solution,

[0037] Add 30% aqueous polyethylene wax emulsion containing 2.3g of polyethylene into the graphene oxide aqueous solution, stir and mix evenly, then add 1g of 10% aluminum chloride solution for demulsification, and obtain polyethylene / graphene oxide particle suspension liquid;

[0038] (2) Add 10 g of glucose to the polyethylene / graphene oxide particle suspension prepared in step (1), reduce it for 24 hours at 80°C, and filter it in a vacuum oven with a vacuum of 0.07MPa and a temperature of 70°C After drying for 15 hours in medium, a polyethylene / graphene masterbatch with a graphene content of 30.3% was obtained.

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Abstract

The invention discloses a preparation method of polyethylene / graphene master batch, comprising the following steps: firstly blending an aqueous solution of graphene oxide and a water-based polyethylene wax emulsion, uniformly mixing and demulsifying to form a polyethylene / graphene oxide particle suspension, adding a reducing agent into the polyethylene / graphene oxide particle suspension to carry out a reduction reaction, filtering and drying to obtain the polyethylene / graphene master batch. By the above method, uniform dispersion of graphene oxide in the polyethylene matrix is realized. In addition, no organic solvent is used such that the preparation method is green and environmentally-friendly. The prepared polyethylene / graphene master batch is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of polymer / graphene, and in particular relates to a preparation method of polyethylene / graphene masterbatch. Background technique [0002] Polyethylene has the advantages of non-toxic, odorless, low density, excellent moisture absorption resistance, excellent acid and alkali corrosion resistance, and excellent solubility resistance. As a general-purpose plastic, it is widely used in the automobile industry, household appliances, pipes, and mechanical parts. etc. However, polyethylene also has shortcomings such as insufficient mechanical strength, sensitivity to environmental stress, and poor heat aging resistance, which limit its application range. Studies have found that when graphene is used as a reinforcing phase and the addition amount is low, the performance of polyethylene can be greatly enhanced. However, due to the large specific surface area of ​​graphene and the inherent van der Waals force betwe...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K9/04C08K3/04C08J3/22
Inventor 邵磊山李静静周小群许敏岑静芸彭叶黄艳芳蔡伟
Owner CHINA PETROLEUM & CHEM CORP
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