Preparation method of light bandwidth wave-absorbing material
A wave-absorbing material and bandwidth technology, applied in the field of functional materials, to achieve the effect of simple and efficient process, wide absorption frequency band and low surface density
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Embodiment 1
[0022] Step 1: Accurately weigh 85g of the mixture of conductive carbon black and carbonyl iron, 7g of acrylic resin, 8g of silane coupling agent, and 100g of absolute ethanol; dissolve the acrylic resin in absolute ethanol, and stir until it dissolves into a transparent homogeneous solution;
[0023] Step 2: Add conductive carbon black and silane coupling agent to the above-mentioned adhesive glue, mechanically stir and sonicate for 30 minutes to prepare absorbent glue;
[0024] Step 3: Immerse soft polyurethane with a thickness of 6mm in the above glue, pull the filtrate, then dip again, repeat 4 times, finally drain the excess glue, and dry it in a vacuum oven at 40°C ;
[0025] Step 4: Process the dried flexible polyurethane-based foam absorbing material according to the size specified in "GJB2038-94" to obtain the finished product.
Embodiment 2
[0027] Step 1: Accurately weigh 75g of the mixture of conductive carbon black and carbonyl iron, 21g of acrylic resin, 4g of silane coupling agent, and 100g of absolute ethanol; dissolve the acrylic resin in absolute ethanol, and stir until it dissolves into a transparent homogeneous solution;
[0028] Step 2: Add conductive carbon black and silane coupling agent to the above-mentioned adhesive glue, stir mechanically and ultrasonically for 45 minutes to prepare absorbent glue;
[0029] Step 3: Immerse soft polyurethane with a thickness of 3mm in the above glue, pull the filtrate, then dip again, repeat 3 times, finally drain the excess glue, and dry in a vacuum oven at 40°C ;
[0030] Step 4: Process the dried flexible polyurethane-based foam absorbing material according to the size specified in "GJB2038-94" to obtain the finished product.
[0031] Depend on image 3 It can be seen that the light-weight broadband wave-absorbing material prepared in this example has good wav...
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