Carbon fibre wood electromagnetic shielding material and preparation method thereof
A technology of carbon fiber and rubber carbon fiber, which is applied in the field of electromagnetic shielding materials, can solve the problems of complex metallization process, high dependence on graphite, and small particle size, and achieve the requirements of electromagnetic shielding function, good mechanical and conductive characteristics, and simple composite process Effect
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specific Embodiment approach 1
[0018] Specific Embodiment 1: In this embodiment, poplar wood fiber with a moisture content of 6% is used as the matrix material, and 3K, 6mm chopped carbon fiber with a tensile strength of 2.5 to 3.5 Gpa and a tensile modulus of 220 Gpa is used as a reinforcement Material mixing and hot pressing to prepare composite materials, the specific steps are as follows:
[0019] (1) The wood fiber and urea-formaldehyde glue are fully stirred according to the mass ratio of 5:1 by the spray sizing method, and the glue-mixed wood fiber is formed after mixing evenly;
[0020] (2) Mix 6mm chopped carbon fiber with acetone solution at a mass ratio of 10:1 to disperse the carbon fiber;
[0021] (3) Mix isocyanate and acetone solution at a mass ratio of 1:2, and then fully mix with dispersed carbon fibers to form rubber-mixed carbon fibers, wherein the mass ratio of carbon fibers to isocyanate is 10:1;
[0022] (4) According to the mass ratio of the mixture of carbon fiber and isocyanate: th...
specific Embodiment approach 2
[0030] Specific embodiment two: In this embodiment, poplar wood fiber with a moisture content of 6% is used as the matrix material, and 3K, 6mm chopped carbon fiber with a tensile strength of 2.5 to 3.5 Gpa and a tensile modulus of 220 Gpa is used as a reinforcement Materials are mixed and hot-pressed to prepare composite materials, and boards are made according to the method steps of embodiment (1):
[0031] (1) The wood fiber and urea-formaldehyde glue are fully stirred according to the mass ratio of 5:1 by spray sizing method, and the glue-mixed wood fiber is formed after mixing evenly;
[0032] (2) Mix 6mm chopped carbon fiber with acetone solution at a mass ratio of 10:1 to disperse the carbon fiber;
[0033] (3) After mixing isocyanate and acetone solution at a mass ratio of 1:2, fully mix with dispersed carbon fibers to form rubber-mixed carbon fibers, wherein the mass ratio of carbon fibers to isocyanate is 10:1;
[0034] (4) According to the mass ratio, it is a mixtu...
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