Preparation method of porous dielectric composite
A composite material and dielectric technology, applied in the field of composite material preparation, can solve the problems of poor practical applicability, poor material performance, uneven distribution of surface polymers, etc., and achieve the effect of reducing usage and improving material performance.
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Embodiment 1
[0037] Mix 50mg of original carbon nanotubes and 70ml of acetonitrile solvent, and sonicate for 1h. Two monomers, divinylbenzene (DVB) 240 mg and glycidyl methacrylate (GMA) 160 mg, were added to the above suspension. Add 20 mg of initiator AIBN to the above system, blow in nitrogen and raise the temperature to 75°C, and react under this condition for 12 hours. After the reaction was stopped, the core-shell material DVB-GMA@MWNTs with a coating thickness of 5 nm was prepared by washing with DMF, suction filtration, and drying. figure 1 (b) is the TEM picture of the core-shell material that the present embodiment coats thickness is 5nm, and figure 1 (a) Comparison shows that the outer wall of MWNTs has a uniform coating layer. Then 0.5 g of the core-shell material with epoxy groups on the surface was added into 20 ml of ethanol, and ultrasonicated for 1 h. Add 0.3g of polyetheramine D-230 into the mixture and stir evenly. After removing the solvent, place it at 80°C for 2 ho...
Embodiment 2
[0039] Mix 50mg of original carbon nanotubes and 70ml of acetonitrile solvent, and sonicate for 1h. Add 300 mg of the two monomers divinylbenzene (DVB) and 200 mg of glycidyl methacrylate (GMA) to the above suspension. Add 25mg of initiator AIBN to the above system, blow nitrogen gas and raise the temperature to 75°C, and react under this condition for 12h. After the reaction was stopped, the core-shell material DVB-GMA@MWNTs with a coating thickness of 25 nm was prepared by washing with DMF, suction filtration and drying. figure 1 (c) is the TEM picture of the core-shell material that the present embodiment cladding thickness is 25nm, and figure 1 (a) Comparison shows that the outer wall of MWNTs has a uniform coating layer. Then 0.5 g of the core-shell material with epoxy groups on the surface was added into 20 ml of ethanol, and ultrasonicated for 1 h. Add 0.5g of polyetheramine D-230 into the mixture and stir evenly. After removing the solvent, place it at 80°C for 2 ho...
Embodiment 3
[0041] Mix 50mg of original carbon nanotubes and 70ml of acetonitrile solvent, and sonicate for 1h. Two monomers, divinylbenzene (DVB) 360 mg and glycidyl methacrylate (GMA) 240 mg, were added to the above suspension. Add 30mg of initiator AIBN to the above system, blow nitrogen and raise the temperature to 75°C, and react under this condition for 12h. After the reaction was stopped, the core-shell material DVB-GMA@MWNTs with a coating thickness of 35 nm was prepared by washing with DMF, suction filtration and drying. figure 1(d) is the TEM picture of the core-shell material that the present embodiment cladding thickness is 35nm, and figure 1 (a) Comparison shows that the outer wall of MWNTs has a uniform coating layer. Then 0.5 g of the core-shell material with epoxy groups on the surface was added into 20 ml of ethanol, and ultrasonicated for 1 h. Add 0.7g of polyetheramine D-230 into the mixture and stir evenly. After removing the solvent, place it at 80°C for 2 hours, a...
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