Nano-cellulose modified low-conductivity olive insulating oil and preparation method thereof

A nano-cellulose, low-conductivity technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of easy aging of olive insulating oil, transformer insulation failure, insulation performance decline, etc., to facilitate popularization and industrial production, and reduce electrical conductivity The effect of low current and cost

Inactive Publication Date: 2021-10-26
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, olive insulating oil is prone to aging during long-term operation, resulting in an increase in conductivity and a decrease in insulation performance, which can easily lead to transformer insulation failure

Method used

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  • Nano-cellulose modified low-conductivity olive insulating oil and preparation method thereof
  • Nano-cellulose modified low-conductivity olive insulating oil and preparation method thereof
  • Nano-cellulose modified low-conductivity olive insulating oil and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Example 1: Preparation of Nanocellulose Modified Low Conductivity Olive Insulating Oil

[0032] The preparation process of nanocellulose-modified low-conductivity olive insulating oil is as follows figure 1 shown, as follows:

[0033] S1. Preparation of nanocellulose particles:

[0034] S1.1. 10g cotton fibers are dispersed in 200g mass percent concentration of sulfuric acid aqueous solution of 60%;

[0035] S1.2. The mixed solution is hydrolyzed by single-mode microwave radiation to obtain a hydrolyzed solution; wherein the temperature of the hydrolysis process is 45°C, the single-mode microwave radiation power is 100 W, and the radiation time is 5 minutes.

[0036] S1.3. the obtained hydrolyzate is diluted to 10 times of the original hydrolyzate volume, and the diluted hydrolyzate is centrifuged three times under the condition of 10000rpm rotating speed, and the precipitation is taken out;

[0037] S1.4. Take the precipitate for dialysis for two days, filter throug...

Embodiment 2

[0042] S1. Preparation of nanocellulose particles:

[0043] S1.1. 9.5g cotton fibers are dispersed in 200g mass percent concentration of sulfuric acid aqueous solution of 60%;

[0044] S1.2. The mixed solution is subjected to single-mode microwave radiation hydrolysis to obtain a hydrolyzed solution; wherein the hydrolysis process temperature is 45°C, the single-mode microwave radiation power is 100 W, and the radiation time is 6 minutes.

[0045] S1.3. the obtained hydrolyzate is diluted to 10 times of the original hydrolyzate volume, and the diluted hydrolyzate is centrifuged three times under the condition of 10000rpm rotating speed, and the precipitation is taken out;

[0046] S1.4. Take the precipitate for dialysis for two days, filter through a filter membrane after dialysis, and disperse the filtrate by ultrasonic to obtain a stable nanocellulose fiber suspension; wherein the molecular weight cut-off of the dialysis membrane used is more than 8000, and the pore size of ...

Embodiment 3

[0051] S1. Preparation of nanocellulose particles:

[0052] S1.1. Disperse 10.5g cotton fiber in 210g mass percent concentration of sulfuric acid aqueous solution of 60%;

[0053]S1.2. The mixed solution is subjected to single-mode microwave radiation hydrolysis to obtain a hydrolyzed solution; wherein the hydrolysis process temperature is 47°C, the single-mode microwave radiation power is 100 W, and the radiation time is 5 minutes.

[0054] S1.3. the obtained hydrolyzate is diluted to 10 times of the original hydrolyzate volume, and the diluted hydrolyzate is centrifuged three times under the condition of 10000rpm rotating speed, and the precipitation is taken out;

[0055] S1.4. Take the precipitate for dialysis for two days, filter through a filter membrane after dialysis, and disperse the filtrate by ultrasonic to obtain a stable nanocellulose fiber suspension; wherein the molecular weight cut-off of the dialysis membrane used is more than 8000, and the pore size of the fi...

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Abstract

The invention relates to the technical field of high voltage and insulation, and particularly discloses a nano-cellulose modified low-conductivity olive insulating oil and a preparation method thereof. The preparation method comprises the following steps: S1, preparing nano-cellulose particles; and S2, adding the prepared nano-cellulose into olive insulating oil, uniformly stirring, performing ultrasonic dispersion, and finally performing drying treatment to obtain the nano olive insulating oil. Compared with the traditional olive insulating oil, the nano-cellulose modified olive insulating oil has the advantages of low conductivity, breakdown resistance and high thermal conductivity; and by adopting the preparation method of the nano-cellulose modified olive insulating oil, the raw materials are uniformly dispersed, the preparation steps are simple, the cost is relatively low, and popularization and industrial production are facilitated.

Description

technical field [0001] The invention relates to the technical field of high voltage and insulation, in particular to a low-conductivity olive insulating oil modified with nanocellulose and a preparation method thereof. Background technique [0002] Oil-immersed power transformers are critical equipment in the safe operation of power grids, and their failures will interrupt power supply. The insulation performance of oil-immersed transformers mainly depends on the inner insulation composed of insulating oil and insulating paper. Among them, insulating oil plays the role of insulation, heat dissipation and cooling, and ensuring the good operating characteristics of insulating oil is very important for the safe operation of transformers. Olive oil is used as transformer insulating oil due to its advantages of being renewable, degradable, and resistant to breakdown. However, olive insulating oil is easy to age during long-term operation, resulting in increased electrical condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C08B15/02C10N40/16C10N20/06
CPCC10M169/041C08B15/02C10N2040/16C10M2209/12C10M2207/401C10N2020/06
Inventor 张镱议刘捷丰许楚琦李嘉熙
Owner GUANGXI UNIV
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