Electromagnetic shielding flame-retardant material for carbon fiber base material as well as preparation method and application thereof
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A carbon fiber base material and electromagnetic shielding technology, applied in conductive coatings, fireproof coatings, coatings, etc., can solve problems such as transmission loss, shield surface reflection loss, absorption loss, etc., to avoid metal carbonization, improve application performance, and improve Effect of Environmental Resistance
Active Publication Date: 2020-09-22
京准化工技术(上海)有限公司
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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
Method used
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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 a carbon fiber base material as well as a preparation method and application of the electromagnetic shielding flame-retardant material. The material comprises 20-50 parts of a water-based flame-retardant polymer adhesive, 5 to 20 parts of a metal powder conductive filler; 8 to 40 parts of a macromolecular intumescentflame retardant; 4 to 10 parts of an ionic liquid containing phosphorus, nitrogen and halogen; 0.5 to 2.5 parts of a catalytic charring agent, 0.5 to 5.0 parts of a composite antioxidant, 0.5 to 5 parts of an antibacterial mildew inhibitor, 0.5 to 5.0 parts of a flame-retardant cross-linking agent, 0.3 to 3.0 parts of a wetting agent, 0.3 to 3.0 parts of a dispersing agent, 0.3 to 3.0 parts of aleveling agent, 0.2 to 2.0 parts of an antifoaming agent and 0.3 to 3.0 parts of a thickener. The electromagnetic shielding flame-retardant material is applied to a carbon fiber base material; a firmand durable protective layer is formed on the surface; the carbon fiber base material can be protected from being invaded by bacteria and mould, can endure environmental change, has high and low temperature resistance and damp and hot smoke resistance. The electromagnetic shielding flame-retardant material is safe and environment-friendly, a protective layer formed by spraying or coating is low insurface resistance, high in shielding efficiency and good in flame-retardant effect, and when meeting high-temperature flames, the electromagnetic shielding flame-retardant material can rapidly expand into carbon, insulate heat and oxygen and protect a carbon fiber base material from being damaged.
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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