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A kind of electromagnetic shielding flame retardant material for carbon fiber base material and its preparation method and application

A carbon fiber base material and electromagnetic shielding technology, applied in conductive coatings, fireproof coatings, coatings, etc., can solve the problems of lack of flame retardancy and electromagnetic shielding, shield surface reflection loss, absorption loss, etc., and achieve a good overall flame retardancy effect , good dispersion and stable storage, low surface resistance

Active Publication Date: 2022-02-22
京准化工技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Reflection loss caused by impedance mismatch on the surface of the shield;
[0008] (2) When the electromagnetic wave is transmitted inside the shielding material, the electromagnetic energy is absorbed to cause transmission loss or absorption loss;
[0009] (3) Energy loss caused by multiple reflections of electromagnetic waves between the inner walls of the shielding material
[0025] At present, there is a lack of environmentally friendly products in the market that meet such high standards of flame retardancy, electromagnetic shielding and environmental adaptability

Method used

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  • A kind of electromagnetic shielding flame retardant material for carbon fiber base material and its preparation method and application
  • A kind of electromagnetic shielding flame retardant material for carbon fiber base material and its preparation method and application
  • A kind of electromagnetic shielding flame retardant material for carbon fiber base material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0089] Add toluene, melamine-coated modified ammonium polyphosphate (APP) (Sichuan Shifang Changfeng Chemical Co., Ltd.), neopentyl glycol phosphorus oxychloride (DPPC) into the reaction kettle at 10°C (refer to literature for synthesis, for example, Zhao Xiaotao , Zhao Wuli, Li Zuguang, microwave synthesis of neopentyl glycol phosphorus oxychloride, "Guangdong Chemical Industry", 2012), mechanically stirred and mixed uniformly, acid-binding agent triethylamine was added dropwise within 2h, and the reaction was continued for 4h after dropping; the temperature was raised to 60°C, add melamine aqueous solution within 3 hours, and react for 6 hours after dripping; then raise the temperature to 110°C, add melamine aqueous solution again within 3 hours, and react for 8 hours after dripping; after the reaction is completed, the mixture is concentrated, filtered, washed, and dried , A phosphorus-nitrogen one-component intumescent flame retardant with a three-dimensional macromolecular...

Embodiment 2

[0091] In the reaction vessel, add 200 grams of ethanol, 50 grams of silver-coated copper powder, and then dropwise add 0.4 grams of γ-glycidyl etheroxypropyltrimethoxysilane and 0.2 vinyltriethoxysilane, and stir and reflux at 78°C 3 hours, then filtered, washed the solid 3 times with absolute ethanol, and dried in vacuo to obtain silver-coated copper powder after the surface treatment of the coupling agent.

Embodiment 3

[0093] In the reaction vessel, add 200 grams of ethanol, 60 grams of nickel-coated copper powder, and then dropwise add 0.5 grams of isopropyl tris(dioctyl pyrophosphate acyloxy) titanate, 0.5 grams of γ-glycidyl ether oxypropyl base triethoxysilane, stirred and refluxed at 78°C for 3 hours, then filtered, washed the solid three times with absolute ethanol, and dried in vacuo to obtain nickel-coated copper powder after the surface treatment of the coupling agent.

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Abstract

The invention discloses an electromagnetic shielding flame retardant material for carbon fiber substrates, a preparation method and application thereof. Its materials include 20-50 parts of water-based flame-retardant polymer binder, 5-20 parts of metal powder conductive filler, 8-40 parts of macromolecular intumescent flame retardant, 4-10 parts of ionic liquid containing phosphorus, nitrogen and halogen, 0.5 ‑2.5 parts catalytic carbon forming agent, 0.5‑5.0 parts composite antioxidant, 0.5‑5 parts antibacterial and antifungal agent, 0.5‑5.0 parts flame retardant crosslinking agent, 0.3‑3.0 parts wetting agent, 0.3‑3.0 parts dispersant , 0.3-3.0 parts of leveling agent, 0.2-2.0 parts of defoamer, 0.3-3.0 parts of thickener. After the present invention is applied to the carbon fiber base material, it forms a durable protective layer on its surface, which can protect the carbon fiber base material from the invasion of bacteria and mold, can withstand environmental changes, high and low temperature resistance, heat and humidity smoke resistance, and is safe and environmentally friendly. The protective layer formed by spraying or coating has low surface resistance, high shielding efficiency, and good flame retardant effect. When encountering high-temperature flames, the product of the present invention can quickly expand into charcoal, heat and oxygen insulation, and protect the carbon fiber substrate from damage. .

Description

technical field [0001] The invention relates to an electromagnetic shielding material, in particular to an electromagnetic shielding flame retardant material and a preparation method and application thereof. Background technique [0002] As we all know, electromagnetic wave pollution has become another major public hazard after noise pollution, air pollution, water pollution, and solid waste pollution. It has become an important research direction to explore efficient electromagnetic shielding materials, prevent electromagnetic wave pollution to protect the environment and human health, and prevent electromagnetic wave leakage to ensure information security. [0003] There are many kinds of electromagnetic shielding materials (EMI), which are widely used in clothing, medical treatment, construction, electronics, electrical appliances, communications, military, shipbuilding, military industry, security and other industries. [0004] Especially in the fields of military indus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D5/18C09D7/65C09D7/62C09D7/63C09D5/24C08J7/05C08L63/00C08K7/06
CPCC09D133/04C09D5/185C09D7/65C09D7/62C09D7/63C09D5/24C08J7/05C08J7/0427C08L2201/02C08K2003/085C08K2003/0806C08K2003/0862C08K2003/323C08J2363/00C08J2433/04C08K7/06C08K2201/001
Inventor 杨宝敬王天舒林庭丰金翁佳
Owner 京准化工技术(上海)有限公司