Nano-SiC (nano-silicon carbide) modified insulating paper and preparation method and application thereof

A technology of nano-silicon carbide and insulating paper, which is applied in pulp beating methods, special paper, insulators, etc., can solve the problems that the mechanical properties and heat dissipation properties of insulating paper cannot be guaranteed, and achieve excellent power frequency breakdown and dielectric properties. Binding energy, the effect of increasing the contact interface

Inactive Publication Date: 2016-12-21
无锡益联机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, simply using nano-titanium dioxide to modify the insulating paper cannot gu...

Method used

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  • Nano-SiC (nano-silicon carbide) modified insulating paper and preparation method and application thereof

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Embodiment 1

[0022] A preparation method of nano-silicon carbide modified insulating paper, comprising the following steps:

[0023] (1) After the cardboard is cracked by the pulper, it is sent to the refiner for refining. The air source of the refiner is 0.3MPa, the linear speed difference between the chassis and the knife roller is 5.5m / s, and the voltage is 380V , The three-phase is 50Hz, the beating pressure is 1.5kg / cm;

[0024] (2) In parts by weight, mix 26 parts of nano-silicon carbide, 13 parts of nano-titanium dioxide, 9 parts of nano-sodium silicate, 8 parts of coupling agent KH-570, 9 parts of sodium hydroxide, and 32 parts of water, and mix the suspension The liquid was mechanically stirred and dispersed at a speed of 4500r / min, stirred for 7 minutes, and ultrasonically dispersed for 12 minutes to obtain a modified liquid;

[0025] (3) Add the modified liquid prepared in step (2) to the pulp prepared in step (1), stir in a dissociator for 8 minutes, and place the mixture in a...

Embodiment 2

[0029] A preparation method of nano-silicon carbide modified insulating paper, comprising the following steps:

[0030] (1) After the cardboard is cracked by the pulper, it is sent to the refiner for refining. The air source of the refiner is 0.7MPa, the linear speed difference between the chassis and the knife roller is 6.1m / s, and the voltage is 400V , The three-phase is 56Hz, the beating pressure is 3.2kg / cm;

[0031] (2) In parts by weight, mix 43 parts of nano-silicon carbide, 22 parts of nano-titanium dioxide, 14 parts of nano-sodium silicate, 13 parts of coupling agent KH-570, 12 parts of sodium hydroxide, and 40 parts of water. The liquid was mechanically stirred and dispersed at a speed of 5500r / min, stirred for 10 minutes, and then ultrasonically dispersed for 14 minutes to obtain a modified liquid;

[0032] (3) Add the modified liquid prepared in step (2) to the pulp prepared in step (1), stir in a dissociator for 12 minutes, and place the mixture in a sheet former...

Embodiment 3

[0036] A preparation method of nano-silicon carbide modified insulating paper, comprising the following steps:

[0037] (1) After the cardboard is cracked by the pulper, it is sent to the refiner for refining. The air source of the refiner is 0.9MPa, the linear speed difference between the chassis and the knife roller is 6.5m / s, and the voltage is 420V , The three-phase is 60Hz, the beating pressure is 3.8kg / cm;

[0038] (2) In parts by weight, mix 48 parts of nano-silicon carbide, 26 parts of nano-titanium dioxide, 17 parts of nano-sodium silicate, 19 parts of coupling agent KH-570, 15 parts of sodium hydroxide, and 48 parts of water, and mix the suspension The liquid was mechanically stirred and dispersed at a speed of 6000r / min, stirred for 12 minutes, and ultrasonically dispersed for 16 minutes to obtain a modified liquid;

[0039] (3) Add the modified liquid prepared in step (2) to the pulp prepared in step (1), stir in a dissociator for 14 minutes, and place the mixture...

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Abstract

The invention discloses nano-SiC modified insulating paper and a preparation method and application of the nano-SiC modified insulating paper. A paper pulp is modified through using na-SiC particles to obtain the nano-SiC modified insulating paper. Compared with the prior art, the nano-SiC modified insulating paper has the following advantages that (1) nano-SiC is introduced into the nano-SiC modified insulating paper obtained by the preparation method disclosed by the invention to modify the insulating paper, nano-SiC is well combined with cellulose to increase a contact interface between nano-SiC and the cellulose, and a binding effect of nano-SiC in the interface for a fiber intermediate group and effects of interface invagination on carriers bring about more excellent power frequency breakdown and dielectric properties to the insulating paper; (2) the nano-SiC modified insulating paper obtained by the preparation method disclosed by the invention has good mechanical properties and heat dissipation performances.

Description

technical field [0001] The invention belongs to the field of packaging materials for transposed wire cores, and relates to an insulating paper, in particular to a nano-silicon carbide modified insulating paper and a preparation method and application thereof. Background technique [0002] The power transformer is the core component in the power system, and it is responsible for the important task of power transmission in the power system. The inner insulation of the oil-immersed transformer is a composite insulation composed of insulating paper and transformer oil. In recent years, with the continuous improvement of the voltage level, the requirements for the inner insulation of the transformer are also getting higher and higher. Therefore, it is of great practical significance to improve the insulation performance of the composite insulation composed of insulating paper and transformer oil. [0003] At present, a lot of research has been carried out at home and abroad to ...

Claims

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Application Information

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IPC IPC(8): D21H27/12D21H23/06H01B13/06D21D1/02D21F5/14
CPCD21H27/00D21D1/02D21F5/14D21H23/06H01B13/06
Inventor 邱勤晓邱益诚王亚芳
Owner 无锡益联机械有限公司
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