Method for increasing lubricating property and heat conductivity of water-based cutting fluid by polyvinylpyrrolidone modified graphene

A technology of polyvinylpyrrolidone and graphene, applied in lubricating compositions, additives, petroleum industry, etc., can solve problems such as insufficient lubricity

Inactive Publication Date: 2016-11-16
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a major problem with water-based cutting fluids, that is, insufficient lubricity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Graphene modified polyvinylpyrrolidone

[0019] Dissolve polyvinylpyrrolidone in ethanol with a concentration of 10mg / ml, then dissolve graphite powder in a polyvinylpyrrolidone ethanol solution with a concentration of 40mg / ml, and finally sonicate for 1-10 hours. Graphite powder is graphite powder with a mesh number of 8000. The molecular weight of vinylpyrrolidone is 200,000.

[0020] (2) Graphene separation with modified polyvinylpyrrolidone

[0021] Separate the sonicated solution at a rotation speed of 2000-8000rpm, remove the bottom sediment, and take the upper solution. Centrifuge the above solution 1-4 times to remove the insoluble graphene inside.

[0022] (3) Purify the separated graphene

[0023] Add 0.5-3 times the petroleum ether to the obtained solution, and then remove the supernatant liquid at a rotation speed of 2000-8000rpm.

[0024] (4) Dry the purified graphene

[0025] The purified solution of petroleum ether is removed from the ethanol in an oven at 50°C...

Embodiment 2

[0027] (1) Graphene modified polyvinylpyrrolidone

[0028] Dissolve polyvinylpyrrolidone in ethanol with a concentration of 20mg / ml, then dissolve graphite powder in a polyvinylpyrrolidone ethanol solution with a concentration of 40mg / ml, and finally ultrasound for 1-10 hours.

[0029] (2) Graphene separation with modified polyvinylpyrrolidone

[0030] Separate the sonicated solution at a rotation speed of 2000-8000rpm, remove the bottom sediment, and take the upper solution. Centrifuge the above solution 1-4 times to remove the insoluble graphene inside.

[0031] (3) Purify the separated graphene

[0032] Add 0.5-3 times the petroleum ether to the obtained solution, and then remove the supernatant liquid at a rotation speed of 2000-8000rpm.

[0033] (4) Dry the purified graphene

[0034] The purified solution of petroleum ether is removed from the ethanol in an oven at 50°C, and the final product is obtained after drying.

Embodiment 3

[0036] (1) Graphene modified polyvinylpyrrolidone

[0037] Dissolve polyvinylpyrrolidone in ethanol with a concentration of 30mg / ml, then dissolve graphite powder in a polyvinylpyrrolidone ethanol solution with a concentration of 40mg / ml, and finally sonicate for 1-10 hours. The graphite powder is graphite powder with a mesh number of 8000. The molecular weight of vinylpyrrolidone is 200,000.

[0038] (2) Graphene separation with modified polyvinylpyrrolidone

[0039] Separate the sonicated solution at a rotation speed of 2000-8000rpm, remove the bottom sediment, and take the upper solution. Centrifuge the above solution 1-4 times to remove the insoluble graphene inside.

[0040] (3) Purify the separated graphene

[0041] Add 0.5-3 times the petroleum ether to the obtained solution, and then remove the supernatant liquid at a rotation speed of 2000-8000rpm.

[0042] (4) Dry the purified graphene

[0043] The purified solution of petroleum ether is removed from the ethanol in an oven at ...

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PUM

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Abstract

The invention relates to a method for increasing the lubricating property and heat conductivity of water-based cutting fluid by polyvinylpyrrolidone modified graphene, comprising the following steps: (1) dissolving polyvinylpyrrolidone in ethanol, then dissolving graphite powder in the polyvinylpyrrolidone ethanol solution, and finally carrying out ultrasonic treatment for 1-10 hours; (2) centrifuging the solution after ultrasonic treatment at the rotation speed of 2000-8000rmp for removing bottom sediments, taking the supernatant solution, and centrifuging the supernatant solution for 1-4 times for removing insoluble graphene in the solution; (3) adding 0.5-3 times of petroleum ether into the solution obtained in the step (2), and centrifuging at the rotation speed of 2000-8000rmp for removing the supernatant solution; and (4) removing ethanol from the petroleum ether-purified solution in an oven at 50 DEG C, and drying to obtain a final product. The method is capable of improving the lubricating property and heat conductivity of the water-based cutting fluid, the whole process is simple and safe, the cost is low, the period is short, and the effect is obvious.

Description

[Technical Field] [0001] The invention belongs to the field of chemical industry, and specifically is a method for increasing the lubricity and thermal conductivity of water-based cutting fluid by polyvinylpyrrolidone modified graphene. [Background technique] [0002] Graphene is a transparent material with a two-dimensional network structure in a single atomic layer developed in the past ten years. It has good electrical conductivity, thermal conductivity, light transmittance, and mechanical strength better than other existing materials. It is pre-made. The best material for the ladder. Since graphene sheets were obtained from experiments for the first time in 2004, its applications in biology, medicine, optoelectronic materials, semiconductors and conductors have been unprecedentedly developed. Due to the excellent properties of graphene, it is predicted to be the 21st century. The most important new material. Currently, the methods for preparing graphene include mechanical e...

Claims

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Application Information

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IPC IPC(8): C10M173/02C10M149/10C10M125/02C01B31/04C10N40/22C10N30/06
CPCC10M125/02C10M149/10C10M173/02C10M2201/041C10M2217/028C10N2030/06C10N2040/22
Inventor 韩生马文飞赵维娜陈海军薛原马鹏蔺华林余焓于飞卢德力蒋继波李原婷邱丰裴素鹏祝俊何忠义熊丽萍
Owner SHANGHAI INST OF TECH
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