A broadband terahertz absorbing material and its preparation method
A wave-absorbing material and terahertz technology, applied in the field of terahertz wave-absorbing materials, can solve problems such as the decline of terahertz wave absorption performance indicators, heavy weight of terahertz wave-absorbing materials, and sluggish high-frequency response of electromagnetic fields, etc., to achieve good free space Impedance matching, good absorption performance, and fast high-frequency response
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Embodiment 1
[0038] according to figure 1 The process flow shown prepares a terahertz absorbing material with a size of 300mm×300mm and a thickness of 0.85mm. The specific process flow is as follows:
[0039] Ingredients: Weigh raw materials by mass parts: 1 part of antioxidant KY-405, 24.2 parts of absorbent (acetylene carbon black), 1 part of stearic acid, 100 parts of polyurethane gum, coupling agent (silane coupling agent A -151) 3 parts, vulcanizing agent (2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane) 3 parts, crosslinking aid (triallyl cyanurate TAC) 2 servings.
[0040] Mastication: Masticate 100 parts of raw polyurethane rubber, make it wrap the front roller, make triangular bags several times, add stearic acid, and masticate for 15 minutes in total.
[0041]Mixing: At room temperature, turn on the cooling water, first adjust the roller distance to (2.5±0.5)mm, and gradually add the absorbent acetylene carbon black to the plasticized polyurethane raw rubber until all the absorben...
Embodiment 2
[0049] according to figure 1 The process flow shown prepares a terahertz absorbing material with a size of 300mm×300mm and a thickness of 1.21mm. The specific process flow is as follows:
[0050] Ingredients: Weigh raw materials by weight: 1 part of antioxidant KY-405, 26.6 parts of absorbent (acetylene carbon black), 1 part of stearic acid, 100 parts of polyurethane gum, coupling agent (silane coupling agent A -151) 3 parts, vulcanizing agent (2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane) 3 parts, crosslinking aid (triallyl cyanurate TAC) 2 servings.
[0051] Mastication: Masticate 100 parts of raw polyurethane rubber, make it wrap the front roller, make triangular bags several times, add stearic acid, and masticate for 15 minutes in total.
[0052] Mixing: At room temperature, turn on the cooling water, first adjust the roller distance to (2.5±0.5)mm, and gradually add the absorbent acetylene carbon black to the plasticized polyurethane raw rubber until all the absorbent a...
Embodiment 3
[0060] according to figure 1 The process flow shown prepares a terahertz absorbing material with a size of 300mm×300mm and a thickness of 0.65mm. The specific process flow is as follows:
[0061] Ingredients: Weigh raw materials by mass parts: 1 part of antioxidant KY-405, 19.4 parts of absorbent (mixing carbon black and graphene at a mass ratio of 1:1), 1 part of stearic acid, 100 parts of polyurethane gum, 3 parts of coupling agent (silane coupling agent A-151), 3 parts of vulcanizing agent (2,5-dimethyl-2,5-bis(tert-butyl peroxide) hexane), 3 parts of crosslinking aid (three Allyl cyanurate (TAC) 2 parts.
[0062] Mastication: Masticate 100 parts of raw polyurethane rubber, make it wrap the front roller, make triangular bags several times, add stearic acid, and masticate for 15 minutes in total.
[0063] Mixing: At room temperature, turn on the cooling water, first adjust the roller distance to (2.5±0.5)mm, and gradually add the absorbent acetylene carbon black to the pla...
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