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A kind of insulating material with mica as base material and preparation method thereof

A technology of insulating materials and mica, which is applied in the field of mica-based insulating materials and its preparation, and can solve the problems of limited interface bonding, poor mechanical properties and insulating properties, etc.

Active Publication Date: 2022-06-28
PINGJIANG SHENGYING MICA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The special lamellar structure of mica determines that it has extremely high electrical insulation perpendicular to the cleavage plane. At the same time, it also has good transparency, excellent peelability, chemical stability, reducibility and high temperature resistance. It is a very important insulating material that can maintain the above-mentioned excellent physical and chemical properties in the state. It is widely used in electronics, motors, telecommunications, electrical appliances, aviation, transportation, instrumentation, metallurgy, building materials, light industry and other fields. Aramid mica composite As a new type of insulating material, the material is a composite material prepared from organic high-performance aramid fibers and inorganic mica through modern wet-laid papermaking technology. It has excellent high temperature resistance, flame retardancy and Chemical stability, however, due to the high crystallinity of aramid fibers and the inert surface, the interfacial bonding between them and mica is limited, resulting in loose accumulation of aramid fibers and mica sheets in the material, and there are a large number of structural defects in the material, resulting in The mechanical properties and insulation properties of the material are poor

Method used

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  • A kind of insulating material with mica as base material and preparation method thereof
  • A kind of insulating material with mica as base material and preparation method thereof
  • A kind of insulating material with mica as base material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A mica-based insulating material is prepared from the following components in parts by weight:

[0031] 100 parts of mica, 60 parts of aramid fiber, 10 parts of maleic anhydride grafted polyolefin fiber, 10 parts of carboxymethylated micro / nanocellulose, and 0.5 part of polyethylene oxide.

[0032] Among them, the processing method of mica is as follows:

[0033] Lithium chloride and ethyl dodecanoate were added to ethanol at a mass ratio of 1:1, and after stirring and mixing evenly, the micron mica powder was added, the temperature was raised to reflux and stirred for 4 hours, and then the ethanol was filtered out, washed, and dried.

[0034] Aramid fibers are composed of para-aramid fibers with a length of 1-100 μm and meta-aramid fibers with a length of 1-100 μm;

[0035] Preparation method of carboxymethylated micro / nanocellulose:

[0036] Mix the micro-cellulose with a length of 1-100 μm and the nano-cellulose with a length of 1-100 nm evenly, add isopropyl alcoh...

Embodiment 2

[0042] A mica-based insulating material is prepared from the following components in parts by weight:

[0043] 100 parts of mica, 80 parts of aramid fiber, 10 parts of maleic anhydride grafted polyolefin fiber, 10 parts of carboxymethylated micro / nanocellulose, and 1 part of polyethylene oxide.

[0044] Among them, the processing method of mica is as follows:

[0045] Lithium chloride and ethyl nonadenoate are added to ethanol in a mass ratio of 1:1, and after stirring and mixing evenly, the micron mica powder is added, the temperature is raised to reflux and stirred for 5 hours, then the ethanol is filtered out, washed, and dried.

[0046] Aramid fibers are composed of para-aramid fibers with a length of 1-100 μm and meta-aramid fibers with a length of 1-100 μm;

[0047] Preparation method of carboxymethylated micro / nanocellulose:

[0048] Mix the micro-cellulose with a length of 1-100 μm and the nano-cellulose with a length of 1-100 nm evenly, add isopropyl alcohol to ultr...

Embodiment 3

[0054] A mica-based insulating material is prepared from the following components in parts by weight:

[0055] 80 parts of mica, 60 parts of aramid fiber, 5 parts of maleic anhydride grafted polyolefin fiber, 5 parts of carboxymethylated micro / nanocellulose, and 0.5 part of polyethylene oxide.

[0056] Among them, the processing method of mica is as follows:

[0057] Lithium chloride and ethyl dodecanoate were added to ethanol at a mass ratio of 1:1, and after stirring and mixing evenly, the micron-sized mica powder was added, the temperature was raised to reflux, stirred for 3 hours, and then the ethanol was filtered out, washed, and dried.

[0058] Aramid fibers are composed of para-aramid fibers with a length of 1-100 μm and meta-aramid fibers with a length of 1-100 μm;

[0059] Preparation method of carboxymethylated micro / nanocellulose:

[0060] Mix the micro-cellulose with a length of 1-100 μm and the nano-cellulose with a length of 1-100 nm evenly, add isopropyl alcoh...

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Abstract

The invention relates to the field of insulating materials, in particular to an insulating material with mica as a base material and a preparation method thereof, which is prepared from the following components: mica, aramid fiber, maleic anhydride grafted polyolefin fiber, carboxymethylated Micro / nano cellulose, polyethylene oxide; the mica is treated with Lewis acid and ethyl alkylate, the insulating material prepared by the present invention has good mechanical properties, tensile index ≥ 49.85N·m / g, insulation performance Good, compressive strength ≥ 37.54kV·mm ‑1 , has a good market application prospect.

Description

technical field [0001] The invention relates to the field of insulating materials, in particular to a mica-based insulating material and a preparation method thereof. Background technique [0002] Mica is a special phyllosilicate mineral whose crystal structure is a lamellar structure composed of two layers of silicon-oxygen tetrahedron sandwiched by a layer of aluminum-oxygen octahedron. In its crystal structure, the silicon-oxygen tetrahedron has 1 / 4 Si + Al 3+ Replacement, the original charge balance is broken, the remaining part of the negative charge in the silicon-oxygen tetrahedron needs to be neutralized by metal cations, and the supplementary cation is between the silicon-oxygen tetrahedron and the aluminum-oxygen octahedron. However, the binding force between the supplemented cations and the silicon-oxygen tetrahedron and aluminum-oxygen octahedron is small, which destroys the stable structure between the crystals. Therefore, the crystal plane structure in which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/10C08L51/06C08L1/28C08L71/02C08K9/04C08K3/34
CPCC08L77/10C08L2205/035C08L2205/16C08L2203/20C08L51/06C08L1/286C08L71/02C08K9/04C08K3/34
Inventor 王雅敏
Owner PINGJIANG SHENGYING MICA IND