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High resistivity soil environmental protection grounding resistance reducing agent preparation method

A high-resistivity, resistance-reducing agent technology, used in cable/conductor manufacturing, circuits, connections, etc., can solve the problems of reduced electrical conductivity of metal grounding bodies, rapid rebound of grounding resistance, loss of resistance-reducing effect, etc., to reduce contact resistance. , The structure is dense, and the effect of preventing lightning damage to buildings and equipment

Active Publication Date: 2017-07-11
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing grounding resistance reducing agents are highly corrosive to the metal grounding body. Usually, the longer the time is, the corrosiveness to the metal grounding body will continue to increase, resulting in a continuous decrease in the conductivity of the metal grounding body. In addition, the seasonal groundwater level Rising and falling will cause the active components in the resistance reducing agent to gradually lose its resistance reducing effect with the loss of rainwater, causing the grounding resistance of the grounding device to rebound rapidly, thus limiting the application of the grounding resistance reducing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018]First weigh 100g of lanthanum oxide and 60g of cerium oxide and add them to a beaker containing 300mL of 10% nitric acid solution by mass fraction, then move the beaker into a digital display constant temperature speed measuring stirrer, and stir the reaction at 70°C with a speed of 300r / min After 40 minutes, the mixed solution was obtained and set aside; then 500g of graphene was weighed and added to a pulverizer for pulverization, passed through a 80-mesh sieve, and the sieved matter was collected, and 300g of the sieved matter was placed in a microwave oven, and microwaved at a power of 800W for 8min to make Graphene expansion, adding the expanded graphene to a beaker containing 1L mass fraction of 25% potassium hydroxide solution, soaking for 2h, filtering, collecting the filter residue, washing the filter residue with water 3 times to obtain pretreated graphene; Then above-mentioned pretreatment graphene, Arabic resin, water are mixed by mass ratio 1:1:5 and obtain f...

example 2

[0021] First weigh 150g of lanthanum oxide and 70g of cerium oxide into a beaker filled with 350mL of 10% nitric acid solution, move the beaker into a digital display constant temperature and speed mixer, and stir the reaction at 75°C with a speed of 350r / min After 45min, the mixed solution was obtained and set aside; then 550g of graphene was weighed and added to a pulverizer for pulverization, passed through a 90-mesh sieve, and the sieved matter was collected, and 350g of the sieved matter was placed in a microwave oven, and microwaved for 9min at a power of 800W to make Graphene expansion, adding the expanded graphene to a beaker filled with 1L mass fraction of 25% potassium hydroxide solution, soaking for 2h, filtering, collecting the filter residue, washing the filter residue with water 4 times to obtain pretreated graphene; Then above-mentioned pretreatment graphene, Arabic resin, water are mixed by mass ratio 1:1:5 and obtain fermentation substrate, and fermentation sub...

example 3

[0024] First weigh 200g of lanthanum oxide and 80g of cerium oxide and add them to a beaker containing 400mL of 10% nitric acid solution by mass fraction, then move the beaker into a digital display constant temperature speed measuring stirrer, and stir the reaction at 80°C with a speed of 400r / min 50min, the mixed solution was obtained and set aside; then 600g of graphene was weighed and added to a pulverizer for pulverization, passed through a 100-mesh sieve, and the sieved matter was collected, and 400g of the sieved matter was placed in a microwave oven, and microwaved at a power of 800W for 10min to make Graphene expansion, adding the expanded graphene to a beaker containing 2L mass fraction of 25% potassium hydroxide solution, soaking for 3h, filtering, collecting the filter residue, washing the filter residue with water 5 times to obtain pretreated graphene; Then above-mentioned pretreatment graphene, Arabic resin, water are mixed by mass ratio 1:1:5 and obtain fermentat...

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Abstract

The invention discloses a high resistivity soil environmental protection grounding resistance reducing agent preparation method, and belongs to the grounding material preparation technical field; the method comprises the following steps: reacting lanthana with a nitric acid solution so as to prepare a mixed solution; crushing graphene, heating and expanding same, and Alkaline etching so as to allow the graphene to form a porous structure; importing a resin group on the graphene, allowing the graphene to nest in a bacteria cellulose network structure formed by microbes, and the bacteria cellulose has very strong water reserving ability, thus increasing the grounding body equivalent sectional area and the contact area with the soil; loading organic rare earth and graphene surface resin group into the graphene pores, and mixing with an auxiliary agent so as to obtain the grounding resistance reducing agent. The prepared resistance reducing agent has moisture absorbing ability, is low in resistivity, good in long-acting stability, lossless, and cannot corrode the grounding body, thus providing better resistance reducing effect, and providing wide application prospect.

Description

technical field [0001] The invention discloses a preparation method of an environment-friendly grounding resistance reducing agent for high resistivity soil, and belongs to the technical field of grounding material preparation. Background technique [0002] Grounding is an important means to ensure the safety of electric power, communication, microelectronics and other equipment, buildings and personal safety. A reliable ground should have a low ground resistance value. And the grounding resistance does not change too much with the running time. Usually the ground grid is composed of a closed or open network composed of some horizontal or vertical metal or non-metal electrodes. The grounding material is usually made of steel, copper, stainless steel and other metals, or a grounding device composed of conductive non-metallic materials such as conductive polymers, graphite blocks, conductive paints and metal materials. A stable and reliable grounding device can prevent equi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01R43/00
CPCH01B13/00H01R43/00
Inventor 郭迎庆王维孙冬
Owner CHANGZHOU UNIV
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