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Layered multi-loss mechanism wave-absorbing material and preparation method thereof
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A wave-absorbing material and mechanism technology, applied in the field of wave-absorbing materials, to achieve the effect of facilitating impedance matching and enhancing dielectric loss
Pending Publication Date: 2022-07-08
四川盈乐威科技有限公司
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Although the introduction of magnetic materials on MXene can achieve ideal results, there is still room for improvement in such solutions
Method used
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[0045]Second, the present invention provides a method for preparing a layered multi-loss mechanism wave absorbing material, comprising the following steps:
[0046] Preparation of S1 matching layer
[0047] Ni@MXene was added into WPU, stirred and sonicated to obtain the first mixed solution, and the matching layer was obtained by pouring method;
[0048] Preparation of S2 Sandwich Layer
[0049] ZnO@MXene was added into WPU and stirred and sonicated to obtain a second mixed solution, which was poured on the surface of the matching layer to obtain a sandwich layer;
[0051] MXene is added into WPU and stirred and sonicated to obtain a third mixed solution, which is poured on the surface of the sandwich layer to obtain a reflective layer.
[0052]
Embodiment 1
[0054] A preparation method of a layered multi-loss mechanism wave absorbing material, comprising the following steps:
[0055] Step 1: Preparation of MXene
[0056] Put 40mL 9M HCl into a 100mL polytetrafluoro beaker, then slowly pour 2g LiF into the beaker and stir for 20min, then take 2g Ti 3 AlC 2 - MAX was slowly poured into a beaker, stirred at 40°C for 24h, and after 24h, the reaction product was centrifuged and washed with water to pH > 5, and then MXene was obtained by ultrasonication and freeze-drying;
[0057] Step 2: Preparation of Ni@MXene composite powder
[0058] with NiCl 2 ·6H 2 The Ni@MXene composite powder was prepared with a mass ratio of O to MXene of 3:1: trisodium citrate (0.4 g) and sodium acetate (3.2 g) were dissolved in 60 mL of ethylene glycol; then 0.6 g of ethylene glycol was added to the solution NiCl 2 ·6H 2 O; after it dissolves, add 0.2g MXene to the solution, stir for 20min and then let stand for 1h; then add 6mL N to the solution 2 H...
Embodiment 2
[0067] The difference between this example and Example 1 is that the mass ratio of Ni to MXene in Ni@MXene is 1:1; the mass ratio of ZnO to MXene in ZnO@MXene is 1:1.
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Abstract
The invention relates to the technical field of wave-absorbing materials, and discloses a layered multi-loss-mechanism wave-absorbing material and a preparation method thereof.The layered multi-loss-mechanism wave-absorbing material comprises a matching layer, a sandwich layer and a reflecting layer which are sequentially arranged from outside to inside; the matching layer is composed of Ni (at) MXene / WPU, the sandwich layer is composed of inorganic nano ZnO (at) MXene / WPU, and the reflecting layer is composed of MXene / WPU. According to the layered multi-loss-mechanism wave-absorbing material, the characteristic that different loss mechanisms absorb electromagnetic waves of different frequency bands can be effectively combined, and broadband absorption of the composite material is achieved; compared with the strong reflection effect of resistance loss on electromagnetic waves, the magnetic loss layer on the outer layer reflects less electromagnetic waves, so that the electromagnetic waves can enter the material, namely impedance matching is facilitated.
Description
technical field [0001] The invention relates to the technical field of wave absorbing materials, in particular to a layered multi-loss mechanism wave absorbing material and a preparation method thereof. Background technique [0002] In recent years, the development of electronic equipment and communication technology has brought great convenience to human beings, but also caused a large number of electromagnetic pollution problems. In addition, the requirements for stealth performance of various military equipment are constantly improving, and radar stealth materials are the most critical part of them. Therefore, the development of absorbing stealth materials with excellent electromagnetic wave absorption properties has great strategic value both for national defense construction and national life. [0003] A wave absorbing material is a functional composite material that can convert the energy of incident electromagnetic waves into heat energy and other forms of energy thr...
Claims
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